Adarga · Software Engineer
Updated · 2026-09-24

Adarga Software Engineer
Interview Questions & Guide 2026

THE 60-SECOND BRIEF

As a Software Engineer at Adarga, you are at the forefront of building sophisticated AI-powered intelligence platforms. Your work directly impacts how organizations process vast amounts of unstructured data, turning complex information into actionable insights. This role is critical to the mission of Adarga, as you contribute to the core architecture that powers high-stakes decision-making environments.

The behavioural round is a technical round in narrative form. Prepare it by collecting specifics you actually owned, such as a design you argued against, an incident you diagnosed, or a decision you later reversed, rather than by rehearsing phrasing.

Adarga candidates report 2 rounds · ≈ 2-4 weeks. The stages below are what candidates describe, not a published process.

Bound blast radius with per-tenant concurrency limitsEvolve APIs without breaking pinned SDK clientsMake every write idempotent under client retries

39 min read

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See the practice prompts

15Practice promptsAcross five skill areas
3With worked solutionsIncluded in the practice prompts

As a Software Engineer at Adarga, you are at the forefront of building sophisticated AI-powered intelligence platforms. Your work directly impacts how organizations process vast amounts of unstructured data, turning complex information into actionable insights. This role is critical to the mission of Adarga, as you contribute to the core architecture that powers high-stakes decision-making environments.

You will work in a fast-paced, collaborative environment where technical depth and intellectual curiosity are highly valued. Whether you are optimizing system performance, automating infrastructure, or ensuring security, your contributions will have a tangible effect on the scalability and reliability of Adarga products. Expect to engage with challenging problems that require both a strong grasp of fundamentals and the ability to adapt to new, evolving technologies.

The Adarga interview process

01

First Round

reported

You cannot drill a format you do not know, so put the preparation into material that travels. Three pieces of your own work, each rehearsed until you can take a follow-up you did not anticipate, will carry a conversation or a code walkthrough equally well. Specificity is what separates that from filler. A number needs its definition before it means anything: a p99 is over some window and measured at some hop, and a server-side figure excludes the queueing and network time a client would see. The number you cannot qualify is the one to leave out.

What to demonstrate

  • Whether your examples carry detail only someone who did the work would hold, such as what the binding constraint actually was, which alternative you rejected and why it was worse, and what you measured on each side of the change
  • Whether a number survives one follow-up, meaning you can say what it was measured over and whether it moved because of your change or merely alongside it
  • Whether a failure is described with the specific change that followed it, rather than a lesson stated in general terms
  • Whether your part in a team effort is stated accurately, including what other people did

How to prepare

  • Write a page on each of three projects covering the constraint, the option you rejected, the measurement before and after, and what went wrong. Cut any line you cannot take a follow-up on, since you are writing the parts you will be pressed on rather than a summary.
  • Recover the real figures while you still have access: request volume, data size, latency with its percentile and window, team size, timeline. Note where each came from, whether a dashboard, a design document or memory, and mark the estimates so you can say which they are out loud.
  • Take your weakest project story to someone who works in a different area and have them ask why four times in succession. The point where you run out of answer is the part to go and re-read before the round.
PracHub interview research ↗
02

Second Round

reported

An unlabelled round is first an information problem, and the cheapest information is free. Whoever schedules it can usually tell you how long it runs, who will be in the room and what they work on, whether you will be writing code and in what environment, and whether anything is being sent beforehand. Ask in writing so the answer is on record, then prepare for the two or three formats those answers still leave open instead of betting on one. What separates a strong candidate is not guessing right; it is having an opening that works whichever one it turns out to be.

What to demonstrate

  • Whether you can start work from an ambiguous brief, since tolerating a vague scope without stalling is the same thing the job asks for
  • Whether the questions you asked beforehand were ones that change your preparation, such as duration, medium and who is joining, rather than ones whose answers you could not have acted on
  • Whether you adapt when the round turns out to be something other than what you were told, instead of spending the first ten minutes visibly recalibrating

How to prepare

  • Send one short scheduling message asking four things: how long, who is joining and what they work on, whether you will be writing code and where, and whether to prepare anything in advance. Treat a vague reply as real information, since it means the round is loosely structured and you will be shaping it yourself.
  • Write one opening that works in any of the formats still open: restate in your own words what you have been asked to do, then ask which of two directions is more useful to them. Say it aloud until it stops sounding recited.
  • Set up for the two most likely formats before the call starts, with a blank editor in the language you would choose and a shared document you can type into, so a format surprise costs you nothing in the first minutes
PracHub interview research ↗

Where candidates lose points

PracHub editorial advice for the preparation topics above.

01

Serialising a tenant's writes through select ... for update on a single counter row

It is the first change that makes a counter correct, and it caps that tenant's write throughput at roughly one divided by the lock hold time. A transaction that takes the lock, makes a network call and then commits holds it for the entire round trip: at 2 ms that is about 500 writes per second for the whole tenant, and the largest tenants are exactly the ones that exceed it. The damage then spreads, because every waiter holds a database connection while it queues, so one hot tenant drains the shared pool and the symptom presents as a site-wide latency incident rather than as a lock problem. The repairs are to shrink the critical section to a single statement, to shard the counter into per-(tenant, hour) or per-(tenant, bucket) rows and sum on read, or to batch in memory and flush periodically while accepting the bounded loss that batching implies.

02

Paginating a growing table with limit and offset

Two unrelated defects share the idiom. Correctness: rows inserted or deleted between page requests shift the window, so a consumer walking an export skips rows and sees others twice, which for a customer-facing sync is silent data loss rather than an error anyone notices. Cost: the database still produces and discards the skipped rows, so page N costs time proportional to N times the page size and a deep page on a large table degrades from milliseconds to seconds. Keyset pagination over a stable, unique, indexed ordering -- where (created_at, id) < ($1, $2) order by created_at desc, id desc limit $3 -- is constant-cost per page and immune to shifting, on the precondition that the cursor columns never change value for a row, which disqualifies updated_at as a cursor.

03

Retrying a write that is not safe to repeat

A timeout tells you nothing about whether the server applied the write, so a blind retry of a create or a charge can duplicate it. Either make the operation idempotent, with a caller-supplied key the server deduplicates on or a conditional update, or do not retry it; and use exponential backoff with jitter so the retries of many clients do not synchronise into a second outage.

04

Assuming the input fits in memory

Ask how large the input is in bytes before committing to an in-memory algorithm; beyond that point the options are a single streaming pass, an external sort with bounded buffers, or a sketch that trades exactness for constant memory. An algorithm that assumes random access to the whole input is a different algorithm from one that sees each element once.

Questions & practice

Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.

12 technical prompts3 include a worked solution

Locate a billing reconciliation gap without rescanning ninety million events

hardWorked solution
reconciliationdimensional-bisectionwatermarkshypothesis-testing

A tenant's sealed invoice total is 0.4% below the sum of its raw usage_event rows for the period. That tenant has 90 million events over 30 days in a table partitioned daily on ingested_at, and its rollups carry source_max_ingested_at, revision and sealed_at. Recomputing all 30 days from raw is correct, and you are not going to do it. Give the procedure that locates the divergent (workspace, sku, hour) cell, the cost of each probe, and the one query you run before any of it.

Approach
  1. Run the free query first. Sum raw quantity for the period restricted to ingested_at <= source_max_ingested_at of the sealed rollups, and compare that against the unrestricted sum. The rollup stores the watermark precisely so this can be answered without a scan. If the whole 0.4% sits above the watermark, nothing is broken: it is late data, it becomes an adjustment line, and the investigation ends in one query.
  2. Only if the gap survives that test do you bisect, and you bisect by dimension rather than by rows. Compare 30 per-day totals, then inside the offending day compare the 6 SKUs, then the workspaces, then the 24 hours. That is roughly 30 + 6 + W + 24 grouped probes, each an indexed range scan over one daily partition for one tenant, against O(N) per attempt for the naive re-fold.
  3. Quantify why naive is not merely slow but unusable mid-incident: at a generous 200,000 rows/second sequential, 90 million rows is about 7.5 minutes per attempt, you will want ten attempts, and every one competes for I/O on the same partitions live ingest is writing. The diagnostic worsens the backlog it is diagnosing.
  4. Before fetching each comparison, state what it would look like under each hypothesis. Two adjacent hours off by equal and opposite amounts is occurred_at versus ingested_at bucketing. A whole day offset by exactly N hours is a timezone applied at the wrong layer. A gap confined to one SKU in one workspace is an environment filter. The same (tenant_id, idempotency_key) present in two ingested_day partitions is the dedup horizon losing a retry that crossed midnight.
  5. Make the next bisection cheap by storing the aggregate you keep recomputing. A per-(tenant_id, ingested_day) count and quantity checksum turns step two from thirty probes into one read, and it is the same number the reconciliation job already produces.
  6. Whatever you find, the sealed period does not change value. The correction is an adjustment line pointing at the line it reverses, carrying its own source_rollup_watermark, because the original invoice is the evidence of what the customer was charged.
Worked solution 35 min
  1. Reproduce the shape locally: generate 2 million events for one synthetic tenant over 5 days, fold them, then inject three defects, namely 0.2% of events bucketed by ingested_at, a handful of duplicate idempotency_key values whose retries cross midnight, and a block of events ingested after the seal.
  2. Write the watermark-bounded query first and record how much of the gap it explains on its own.
  3. Bisect by day, then SKU, then hour, recording the probe count and the rows each probe touches.
  4. For each located cell, write down the predicted signature before querying it, then check whether the data matches the prediction.
  5. Time a full re-fold of the 2 million rows and extrapolate to 90 million.
EXPECTED RESULTThe watermark-bounded query accounts for the post-seal block entirely and removes it from the investigation. The `ingested_at` bucketing appears as adjacent hours off by equal and opposite amounts. The midnight-crossing duplicates appear as one `(tenant_id, idempotency_key)` present in two `ingested_day` partitions. Bisection reaches each cell in fewer than 70 probes.
Follow-up
  • The gap is 0.4% in one direction on one day and 0.4% the other way the next day. What does that shape rule in, and what does it rule out?
  • How do you distinguish a duplicate from a restatement, given revision and recomputed_at on the rollup?
  • Ingest is still running while you investigate. What makes your two numbers comparable at all?

Hold a tenant to a trailing sixty-second request limit

medium
sliding-windowtwo-pointerrate-limitingtenant-skew

The gateway must hold each tenant to R requests in any trailing 60 seconds, in aggregate across three regions and every pod, within a budget of under 10 ms added p99. Peak is 30,000 requests/second across 200,000 active tenants, and traffic is heavily skewed toward a handful of them. Give an exact single-process algorithm with its amortised per-request cost and its memory per tenant, then a bounded-memory approximation and the worst-case overshoot it actually admits. Say what the distributed version does when the counter store is unreachable.

Approach
  1. Exact, single process: a per-tenant deque of request timestamps. On arrival, pop from the front while front <= now - 60s, then admit if the remaining length is below R and push. Each timestamp is pushed once and popped once, so the cost is O(1) amortised. The O(R) version is the one that re-filters the whole deque on every request.
  2. Quote the memory. R = 1,000 across 200,000 active tenants is up to 2 x 10^8 timestamps at 8 bytes, about 1.6 GB, and that is the worst case rather than the mean, because the long tail of small tenants holds almost nothing. Skew helps you here and hurts you in the sharding decision.
  3. Bounded alternative, with its real bound stated: a fixed 60-second counter is O(1) memory but admits close to 2R across a 60-second span straddling a boundary. The weighted two-bucket estimate, prev * (60 - elapsed)/60 + cur, is better on smooth traffic but assumes the previous window's arrivals were uniform; an adversary packing them at the end of that window is undercounted and can still approach 2R. Say that rather than calling it exact.
  4. Token bucket is the usual gateway answer and a different contract: O(1) state per tenant (tokens, last_refill), a sustained rate, and a deliberate burst allowance equal to the bucket size. Choose it when a burst is acceptable and the log when the limit is contractual.
  5. Distributed: the limit is per tenant in aggregate, so a local bucket of R/N per pod is wrong in both directions under skew. A tenant landing on one pod is throttled at R/N, and a tenant spread evenly across pods exceeds R. The shared check must be a single atomic round trip, one script or one increment-and-compare, never read-then-write, and it must fit inside the 10 ms p99 budget.
  6. Decide the unavailable case in advance and write it down. Failing open keeps the product up and lets a tenant exceed its limit for the duration; failing closed converts a counter-store outage into a full outage. Most gateways fail open on rate limits and closed on authorisation, and those are two separate decisions made separately.
Follow-up
  • One tenant sends 40% of all traffic. What does that do to a single counter key, and what do you shard on instead?
  • Quotas rather than rate limits: the check is select used; if used < limit then insert. Name the isolation level that still permits the overshoot, and the two fixes.
  • How do you return an accurate Retry-After from the exact algorithm without a second scan?

Order a job dependency graph and find its critical path

medium
topological-sortdag-longest-pathcycle-detectioncritical-path

A workspace defines up to 50,000 jobs with up to 200,000 dependency edges and an estimated duration_seconds per job. Given the edge list, reject the graph if it contains a cycle and name one cycle's nodes; otherwise return a valid execution order, the earliest possible completion time with unlimited workers, and the set of jobs whose slack is zero. Then say which single job to shorten in order to cut the completion time, and by exactly how much. State the complexity of each part.

Approach
  1. Kahn's algorithm for the order: compute indegrees, seed a queue with zero-indegree nodes, emit and decrement. O(V + E), which at 50,000 and 200,000 is milliseconds. If fewer than V nodes are emitted, the graph contains a cycle.
  2. Kahn detects a cycle but cannot name one. The nodes left with indegree above zero contain every cycle, so run one DFS restricted to that residual subgraph with three-colour marking and report the stack slice from the grey node the back edge points at. That is the difference between a usable error message and 'dependency cycle detected'.
  3. Earliest completion with unlimited workers is the longest path, which is NP-hard on a general graph and linear on a DAG. State the precondition, then relax in topological order: earliest_finish[v] = duration[v] + max(earliest_finish[u] for u in preds(v)), taking the max over an empty predecessor set as zero. The makespan T is the maximum over all nodes. O(V + E).
  4. Second pass in reverse topological order for latest_finish, then slack[v] = latest_finish[v] - earliest_finish[v]. Zero-slack nodes form the critical path, and there can be several disjoint critical paths, so return the set rather than one chain. slack[v] = 0 is exactly the statement that some longest path runs through v; equivalently, the longest path through v has length T - slack[v].
  5. The speed-up bound is the point of the question, and the obvious form of it is wrong. Shortening a zero-slack job v by d, with 0 <= d <= duration[v], cuts the makespan by min(d, T - L_avoid(v)), where L_avoid(v) is the longest path in the graph with v deleted: the longest path that avoids v, not the second-longest path overall. The two coincide only when the runner-up path misses v. Counterexample: A of 10 s feeds both B of 5 s and C of 4 s, so T = 15 s and the second-longest path is 14 s, yet shortening A by 10 s leaves a makespan of 5 s. The realised gain is the full 10 s, because both paths ran through A and shrank together, while min(10, 15 - 14) predicts 1 s. The reason is structural: shortening v reduces every path through v by d and leaves every other path alone, so the new makespan is max(T - d, L_avoid(v)).
  6. Compute L_avoid(v) the direct way: delete v and re-run the same forward relaxation, O(V + E) per candidate. The cheaper equivalent skips the deletion, since L_avoid(v) only ever matters through that max: set duration[v] := 0, recompute the makespan as T0(v) = max(T - duration[v], L_avoid(v)), and the gain is min(d, T - T0(v)), which is identical for every d <= duration[v]. Only zero-slack jobs are candidates, because shortening a job with positive slack changes the completion time not at all. One relaxation is milliseconds at this size, so ranking a critical set in the hundreds costs O(k(V + E)) and is worth doing exactly; a critical set in the tens of thousands is not, and there you evaluate a shortlist, longest jobs first, and say that the answer is the best of that shortlist rather than the optimum.
Follow-up
  • Only m workers are available. What happens to your answer, and what can you still promise about the schedule you produce?
  • Edges arrive incrementally as the customer edits the pipeline. How do you detect a cycle at insert time without re-running Kahn over 250,000 elements?
  • Durations are estimates. How would you express completion time as a distribution, and what breaks about the critical path once you do?

Suggested practice checklist

Roughly ninety minutes on weeknights with one longer weekend block. The plan cuts scope rather than compressing everything, on the assumption that one thing finished per night beats four half-started.

Small steps. Visible outcomes.0 / 7 completed
ONE WEEK · YOUR PACE

Prepare, practise & reflect

One practical outcome each day. Spend longer where you need it.

0 / 7 done
01Fix the scope and take a cold baseline
  • Read the role description and write the three things the loop will almost certainly test, then write an explicit not-doing list and keep it visible all week.
  • Take one twenty-five-minute coding problem and one fifteen-minute design prompt cold, and write the single sentence naming what blocked each, because those two sentences decide where the remaining evenings go.
  • Set the week's rule: one thing finished every night, including the night you only have forty minutes.

Deliverable: A one-page scope with a not-doing list and two cold attempts, each carrying one sentence on what blocked it.

Practice prompt ↗Practice prompt ↗Practice prompt ↗Worked solution ↗
02One pattern, written three times from blank
  • Choose the single pattern most likely to appear in your loop and write it three times from an empty file rather than editing the previous attempt.
  • On the third pass, write the invariant as a comment before the loop body and the complexity before the first line of code.
  • Stop at ninety minutes even if the third version is imperfect, and write the one thing you would fix given another hour.

Deliverable: Three independent implementations of the same pattern plus a note on what changed between them.

Practice prompt ↗Practice prompt ↗
03One design, only to the depth you can defend
  • Take one system shape and go only as far as requirements, interface and data model, refusing to draw a box you could not survive a follow-up about.
  • Attach one number to each non-functional requirement, deriving it rather than asserting it, and write the assumption the number rests on.
  • Write the one tradeoff you are choosing against and the observation that would make you reverse it.

Deliverable: One design at interface-and-schema depth with derived numbers and one written reversible tradeoff.

Practice prompt ↗Practice prompt ↗
04Only the fundamentals you will have to defend
  • Write, in under two hundred words each, the answers to the two questions that follow almost any implementation: why this structure and not the obvious alternative, and what happens to this code at a hundred times the input.
  • Write what an index actually costs: faster lookups on the indexed columns against a write that now maintains a second structure, plus the cases where the planner declines to use it anyway, low selectivity, or a predicate wrapping the column in a function.
  • Delete any answer you cannot deliver aloud in under a minute, since an answer that needs reading is not an answer you have.

Deliverable: Three written answers, each under two hundred words and each timed aloud.

Practice prompt ↗Practice prompt ↗Worked solution ↗
05Your own work, timed
  • Write a ninety-second and a four-minute version of your main project and time both aloud rather than reading them.
  • Prepare the two follow-ups that always come: what you would do differently, and how you knew it worked.
  • Put one number in the first sentence and be ready to say exactly where it came from and what it excludes.

Deliverable: Two timed narratives with one defensible number in the opening line.

Practice prompt ↗Practice prompt ↗
06The one full rehearsal, in the weekend block
  • Run a sixty-minute mock covering a coding round and a design round in one sitting with no break, because sustained attention is the thing evenings have not trained.
  • Immediately afterwards, and before hearing any feedback, write the three moments you lost the thread.
  • Spend the rest of the block only on those three moments, and on nothing you merely feel shaky about.

Deliverable: Mock notes naming three failure moments with a specific fix written under each.

Practice prompt ↗Practice prompt ↗
07Taper
  • Write the twenty-minute warm-up you will actually do on the morning: one problem you can already solve from a blank file, one design you can narrate, and nothing you have never seen.
  • Re-read only your own notes from this week and open no new material.
  • Write the logistics down: the editor or shared document you will be working in, whether execution and lookups are permitted, and the sentence you will use when you do not know something.

Deliverable: A one-page card holding the design structure, the project numbers, and the logistics.

Practice prompt ↗Practice prompt ↗Worked solution ↗

Expand any day for tasks and deliverables. Your progress is saved on this device.

'We rewrote it in a better framework' is not a story

A migration is a cost you chose to pay, not an achievement. The story is what the old system made expensive, what you measured before committing, what kept serving traffic during the cutover, and what you would have done if the numbers had come back flat. Without those, a rewrite reads as taste.

Can you walk us through your experience with specific languages and to…

medium
behavioural and engineering judgement

Can you walk us through your experience with specific languages and tools you prefer?

Approach
  1. Name the disagreement and how you resolved it with evidence.
  2. Close with what you would do differently, concretely.
  3. State the situation in two sentences and spend the rest on the reasoning.
Follow-up
  • What would you do differently if you ran that again?
  • What did you decide not to do, and why?

Own the incident where invoices undercounted metered usage

medium
incident responseat-least-oncebilling correctionpostmortem

A metering consumer acknowledged each batch before committing the fold into usage_rollup_hourly. A rolling deploy restarted consumers mid-batch for two hours; roughly 1.4M usage_event rows were acknowledged and never folded, and 61 invoices sealed against the resulting rollups before anyone noticed. Take the owner's role. Describe an incident of comparable blast radius you owned: how it surfaced, the query that sized the loss, what you stopped first, and how the money was corrected. Give a wall-clock timeline and one thing you got wrong while it was still live.

Approach
  1. Open with the invariant that broke and the direction of the error, because they determine everything else: acknowledging before committing makes the consumer at-most-once, so this loses events rather than duplicating them, and loss raises no error anywhere. A listener who hears 'we lost revenue silently' knows immediately why detection took two hours.
  2. Size it with a stated reconciliation rather than an adjective: sum(quantity) from usage_event grouped by (tenant_id, sku, hour of occurred_at) over the window, against usage_rollup_hourly.quantity_sum on the same keys, filtered to environment='production' because staging and sandbox are metered but not billed. Then bisect by hour and tenant until single cells explain the gap. Say how long that ran and whether a replica could serve it while the incident was live.
  3. Separate mitigation from fix and say which came first. Mitigation is holding the sealing job, because a sealed row is frozen by design and every minute of sealing converts a recoverable rollup into an invoice correction. The fix is moving the acknowledgement after the commit, which re-introduces duplicates that the dedup check on (tenant_id, idempotency_key) must now absorb.
  4. State the correction path in the domain's own terms: sealed periods are never edited, so each affected tenant gets an adjustment line on the next invoice with kind='adjustment' and voided_by_line_id pointing at the line it reverses, priced against the same rate tier and carrying the watermark it priced against. That is four separate numbers — tenants affected, minor units, the cycle the adjustment lands in, and when customers were told.
  5. Close on one prevention control with its cost, not five: a per-hour reconciliation comparing raw sum to rollup sum that pages above a threshold. Name the threshold and the false-page rate you accepted, because a detector nobody will keep staffed is not prevention.
  6. Name a mistake you made inside the response window — the wrong first hypothesis, a mitigation that made it worse — rather than a design mistake from six months earlier. That is the part candidates rehearse away and interviewers weight heavily.
Follow-up
  • Your fix moves the acknowledgement after the commit. What breaks now, and what absorbs it?
  • One undercharged tenant has since churned. Do you bill them, and who decides?
  • How would you have caught this in ten minutes instead of two hours, and what would that detector cost you in pages per week?

Disclose a cross-tenant webhook delivery to affected customers

medium
cross-tenant leakdisclosureblast radiusauthorisation checks

An enqueue path took the subscription from one lookup and the payload from another. For nineteen minutes, webhook_delivery rows were created whose tenant_id did not match the subscription's tenant, and eleven payloads were signed and sent to four endpoints belonging to other customers. You hold payload_digest, delivery timestamps and response codes. Describe how you handle a disclosure of this kind: what the records prove, what they cannot prove, what you say before you know everything, the one code change that closes it, and which parts you personally drove.

Approach
  1. Bound the population before saying anything externally. The affected set is deliveries in the window where the event's tenant and the subscription's tenant differ; the ones that actually left are those with delivered_at set and a 2xx in last_response_code. Attempted and delivered are two different counts and a disclosure has to use the right one in the right sentence.
  2. Separate what the records prove from what they do not, and say both halves rather than the flattering one. They prove which payloads were signed, where they went, and — through payload_digest — exactly which bytes. They do not prove what the receiving system did with them, and they do not bound the window more precisely than your deploy timestamps do.
  3. Communicate on the facts you hold, with the scope stated as an upper bound: 'at most eleven payloads, four recipient endpoints, these fields, this window' is more useful and more honest than waiting a day for certainty. The field list matters more than the event count, because a customer cannot assess exposure from 'an event'.
  4. Name the code change precisely, because this class never originates in the delivery worker. Compare the event's tenant against the subscription's tenant at enqueue and again immediately before the payload is signed, and make the second comparison drop the delivery rather than log a warning. Say why one check is insufficient: the enqueue check protects against the bug you know about, the pre-signing check protects the boundary itself.
  5. Run the history question in parallel and say so: a query over historical deliveries for the same mismatch tells you whether this was nineteen minutes or a year, and you would rather find the second case yourself than have a customer find it after your disclosure.
  6. Split the response into workstreams with owners — recipients asked to delete, affected customers notified, the check landed with a test, history swept — and say which you personally drove and which you handed off. Claiming all four is not credible and claiming none is not ownership.
Follow-up
  • The historical sweep finds two more instances from last year. What changes in what you have already told people?
  • Who approves the wording, and what do you do when you are asked to soften the scope?
  • A customer asks you to prove a redelivery contained the same bytes as the original. What do you show them?
  • 01

    Can you walk us through your experience with specific languages and tools you prefer?

  • 02

    A metering consumer acknowledged each batch before committing the fold into usage_rollup_hourly. A rolling deploy restarted consumers mid-batch for two hours; roughly 1.4M usage_event rows were acknowledged and never folded, and 61 invoices sealed against the resulting rollups before anyone noticed. Take the owner's role. Describe an incident of comparable blast radius you owned: how it surfaced, the query that sized the loss, what you stopped first, and how the money was corrected. Give a wall-clock timeline and one thing you got wrong while it was still live.

  • 03

    An enqueue path took the subscription from one lookup and the payload from another. For nineteen minutes, webhook_delivery rows were created whose tenant_id did not match the subscription's tenant, and eleven payloads were signed and sent to four endpoints belonging to other customers. You hold payload_digest, delivery timestamps and response codes. Describe how you handle a disclosure of this kind: what the records prove, what they cannot prove, what you say before you know everything, the one code change that closes it, and which parts you personally drove.

PracHub interview preparation framework ↗

Frequently asked questions

Is this an official Adarga interview guide?

No. It is PracHub's own research and practice material for the Software Engineer role at Adarga. Rounds and questions reflect what candidates have reported, not a process Adarga has published, and they change over time. Confirm the current format and scope with your recruiter.

PracHub interview research ↗
How long does the entire interview process take?

The process is typically streamlined into two main calls. You can expect the entire cycle to move relatively quickly, provided there is alignment between your skills and the team's needs.

PracHub interview research ↗
Is the technical interview focused on whiteboard coding?

Not necessarily. While you should be prepared for technical challenges, the focus is often on real-world application, architecture, and your ability to reason through problems rather than just algorithm memorization.

PracHub interview research ↗
What is the best way to prepare for the "human" aspect of the interview?

Be authentic. Adarga prides itself on a "human" approach to evaluation. They are looking for colleagues who are easy to work with, curious, and willing to share their thought process during a conversation.

PracHub interview research ↗
What is the most common reason candidates don't move forward?

Lack of preparation regarding the company's specific mission and an inability to explain the "why" behind their technical choices. Always be ready to defend your architectural decisions.

PracHub interview research ↗
Sources & methodology 3 sources ↗

No official company page is cited. Rounds and questions come from candidate reports and PracHub editorial material; each source shows the date it was read.

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