At Saronic Technologies, a Software Engineer is at the intersection of high-stakes autonomy, hardware integration, and mission-critical systems. You are not just writing code; you are building the software brain for autonomous vessels that operate in some of the most challenging environments on Earth. Your work directly impacts the reliability, intelligence, and performance of platforms that redefine maritime security. This role requires a unique blend of systems-level thinking and rapid execution. You will contribute to a fast-paced, iteration-heavy environment where the feedback loop between your code and the physical vessel is tight. Whether you are working on embedded systems, Linux environments, or cloud-based data backends, your primary goal is to ensure that our autonomous systems are robust, scalable, and capable of making split-second decisions in the field. ##### Tip Saronic Technologies values candidates who demonstrate a 'builder' mindset. Be prepared to discuss projects where you had to bridge the gap between abstract software requirements and physical hardware constraints.
Recruiter Screen
reportedInitial screening by a recruiter to evaluate your background and fit for the role.
What to demonstrate
- Initial screening by a recruiter to evaluate your background and fit for the role
- Depth in System Design
How to prepare
- Be able to walk your CV end to end in two minutes, and say why this company specifically.
- Have your salary expectations, notice period and location constraints ready, and ask for the rest of the loop in writing.
Technical Assessments
reportedA series of progressively complex technical assessments, including remote coding exercises.
What to demonstrate
- A series of progressively complex technical assessments
- Including remote coding exercises
How to prepare
- Answer aloud and timed: Explain your thought process during a live, collaborative coding session.
- Answer aloud and timed: How would you optimize this algorithm for memory usage in an embedded environment?
Technical Presentations
reportedCandidates may be required to present technical topics or projects to assess communication skills.
What to demonstrate
- Candidates may be required to present technical topics or projects to assess communication skills
- Depth in System Design
How to prepare
- Answer aloud and timed: Design a system for real-time data ingestion from remote, hardware-constrained devices.
- Answer aloud and timed: How would you architect a communication layer between a cloud backend and an autonomous vessel?
Onsite Visit
reportedAn intensive onsite interview that includes multiple rounds of evaluations.
What to demonstrate
- An intensive onsite interview that includes multiple rounds of evaluations
- Depth in System Design
How to prepare
- Answer aloud and timed: Discuss the trade-offs between different communication protocols for low-bandwidth environments.
- Answer aloud and timed: How do you ensure high availability in a distributed system with intermittent connectivity?
PracHub editorial advice for the preparation topics above.
Own your past work
Be prepared to explain every line of code or design decision in the projects you present. If you didn't build it yourself, be clear about your specific contribution.
Communicate your thought process
We are as interested in how you arrive at a solution as we are in the solution itself. Thinking out loud is highly encouraged.
Stay mission-focused
Understand what Saronic Technologies is building and why it matters. Connecting your technical skills to our mission will set you apart.
Prepare for ambiguity
Real-world engineering is rarely clean. Don't be afraid to ask clarifying questions if a problem statement seems incomplete; this is a sign of a thoughtful engineer.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Solve a system of equations given varying input formats (e.g., strings, dictionaries, trees).
Solve a system of equations given varying input formats (e.g., strings, dictionaries, trees).
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Implement a specific data structure or algorithm from scratch to solve a parsing problem.
Implement a specific data structure or algorithm from scratch to solve a parsing problem.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Explain your thought process during a live, collaborative coding session.
Explain your thought process during a live, collaborative coding session.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
How would you optimize this algorithm for memory usage in an embedded environment?
How would you optimize this algorithm for memory usage in an embedded environment?
Approach
- Say what the runtime actually does before reasoning about the code.
- Name what is shared across threads and what owns each piece of state.
- Identify the window where an invariant is briefly untrue.
- Distinguish a value from a reference to it, and say which one you handed out.
Follow-up
- What happens if two callers reach this at the same time?
- Where could this allocate more than you expect?
Find version gaps and relay lag with window functions
outbox_event holds event_id, aggregate_type, aggregate_id, aggregate_version, event_type, payload, status ('pending','published','dead'), attempts, created_at, published_at. A projection is missing rows and you must decide whether the relay skipped events or the consumer dropped them. Write three queries over the last seven days: one listing every aggregate_id whose published aggregate_version sequence has a hole, one giving per-day counts with a running total, and one returning the newest published event per aggregate. For each, say where the window function is evaluated relative to WHERE and LIMIT. PostgreSQL 16.
Approach
- Gaps: compute lead(aggregate_version) OVER (PARTITION BY aggregate_id ORDER BY aggregate_version) in a subquery, then filter next_version <> aggregate_version + 1 in the outer query. Window functions are evaluated after WHERE, GROUP BY and HAVING and before the outer ORDER BY and LIMIT, so the predicate cannot sit in the same WHERE clause and PostgreSQL 16 has no QUALIFY.
- Say what the seven-day filter does to the answer: it truncates every partition, so the first row per aggregate has no predecessor inside the window and a hole spanning the boundary is invisible. Widen the window, or join to resource.version as the authority for the true maximum.
- Running total: SELECT date_trunc('day', created_at) AS d, count() AS n, sum(count()) OVER (ORDER BY date_trunc('day', created_at) ROWS UNBOUNDED PRECEDING). An aggregate inside a window call is legal because grouping runs before windowing. The grouping key is unique per row here so ROWS and RANGE agree, but write the frame anyway — over ungrouped rows with tied timestamps the default RANGE frame pulls in every peer row and the total jumps.
- Newest per aggregate: DISTINCT ON (aggregate_id) ... ORDER BY aggregate_id, aggregate_version DESC is the cheap PostgreSQL-only form when an index matches that order; row_number() OVER (PARTITION BY aggregate_id ORDER BY aggregate_version DESC) = 1 is the portable form and needs a subquery for the same evaluation-order reason as the gap query.
Follow-up
- Relay failover redelivers events. Does a duplicate break the gap query, and how would you detect one from this table alone?
- Turn the gap check into a continuous monitor rather than a query someone runs after an incident. What does it watch?
Denormalise tenant onto revisions and backfill it live
resource_revision (revision_id, resource_id, version, actor_user_id, change_kind, patch, request_id, created_at) has 400M rows and no tenant column; tenant_id lives only on resource. Two reads need it: a tenant-scoped audit feed ordered by created_at DESC, and an offboarding purge. Both join back to resource today. Justify adding tenant_id to resource_revision against those two reads, name the anomaly the copy introduces and the constraint that prevents it, then give the ordered migration for a live table taking 1.2k writes/second — the lock each step takes, how the backfill is batched, and where each step stops being reversible. PostgreSQL 16.
Approach
- Justify from the access path rather than from taste. Without the column, the audit feed either scans resource_revision by created_at and discards other tenants' rows, or resolves the tenant's resource_ids first and probes with them — both proportional to the tenant's whole history rather than to one page. With (tenant_id, created_at DESC, revision_id DESC) it is a seek that stops at 50 rows, and the purge becomes a ranged delete instead of a join.
- Name the cost exactly: a second copy of a fact can disagree with the first. Make the disagreement unwritable rather than documented — add UNIQUE (resource_id, tenant_id) on resource so it can serve as a foreign-key target, then FOREIGN KEY (resource_id, tenant_id) REFERENCES resource (resource_id, tenant_id) on the revision table. A revision can then only ever carry its parent's tenant.
- Step one, expand: ALTER TABLE resource_revision ADD COLUMN tenant_id BIGINT NULL, with no default, so it is a catalogue change and no rewrite. It still needs ACCESS EXCLUSIVE for an instant, and that instant queues behind the longest open transaction on the table while every later query queues behind it — set lock_timeout to 2s and retry rather than wait.
- Step two, dual-write: deploy the writer that populates tenant_id on every new revision while reads still use the join. Reversible by redeploying the previous build, because nothing reads the column yet.
Follow-up
- The backfill is half finished and a rollback is required. What state is the table in, and what does the previous build do with a half-populated column?
- How do you verify the backfill actually finished, given rows are still being inserted while it runs?
Design a system for real-time data ingestion from remote, hardware-constrained devices.
Design a system for real-time data ingestion from remote, hardware-constrained devices.
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
How would you architect a communication layer between a cloud backend and an autonomous vessel?
How would you architect a communication layer between a cloud backend and an autonomous vessel?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Discuss the trade-offs between different communication protocols for low-bandwidth environments.
Discuss the trade-offs between different communication protocols for low-bandwidth environments.
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
How do you ensure high availability in a distributed system with intermittent connectivity?
How do you ensure high availability in a distributed system with intermittent connectivity?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Describe a project where you had to work closely with hardware engineers to debug a system-level issue.
Describe a project where you had to work closely with hardware engineers to debug a system-level issue.
Approach
- Establish what changed and when, before forming any theory.
- Pick a bisection that eliminates candidates whichever way it turns out.
- Check the instrumentation before believing the symptom.
- Separate the trigger from the cause; the deploy is rarely the bug.
Follow-up
- What would you look at first, and what would it rule out?
- How would you tell a cause from a coincidence here?
Built from the rounds and topics Saronic Technologies candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Saronic Technologies loop
- Write out the reported sequence: Recruiter Screen, Technical Assessments, Technical Presentations, Onsite Visit.
- For each round, write one sentence on what it is judging, from the description above, and mark the one you are least ready for.
Deliverable: A one-page map of the 4 reported rounds, with the weakest marked.
02Work System Design
- Spend the session on System Design, which Saronic Technologies candidates report being tested on.
- Write one worked example in System Design and time yourself on it.
Deliverable: One timed worked example in System Design.
03Work Systems Software
- Spend the session on Systems Software, which Saronic Technologies candidates report being tested on.
- Write one worked example in Systems Software and time yourself on it.
Deliverable: One timed worked example in Systems Software.
04Work Embedded / Linux Environments
- Spend the session on Embedded / Linux Environments, which Saronic Technologies candidates report being tested on.
- Write one worked example in Embedded / Linux Environments and time yourself on it.
Deliverable: One timed worked example in Embedded / Linux Environments.
05Answer out loud: Coding and Algorithmic Proficiency
- Answer aloud, timed: Solve a system of equations given varying input formats (e.g., strings, dictionaries, trees).
- Answer aloud, timed: Implement a specific data structure or algorithm from scratch to solve a parsing problem.
Deliverable: Spoken answers to 2 reported Coding and Algorithmic Proficiency question(s), under time.
06Answer out loud: System Design and Architecture
- Answer aloud, timed: Design a system for real-time data ingestion from remote, hardware-constrained devices.
- Answer aloud, timed: How would you architect a communication layer between a cloud backend and an autonomous vessel?
Deliverable: Spoken answers to 2 reported System Design and Architecture question(s), under time.
07Answer out loud: Behavioral and Problem Solving
- Answer aloud, timed: Tell me about a time you had to pivot your technical approach based on new hardware constraints.
- Answer aloud, timed: Describe a project where you had to work closely with hardware engineers to debug a system-level issue.
Deliverable: Spoken answers to 2 reported Behavioral and Problem Solving question(s), under time.
Expand any day for tasks and deliverables. Your progress is saved on this device.
Behavioural rounds judge the decision you made and what it cost.
Tell me about a time you had to pivot your technical approach based on new hardware constraints.
Tell me about a time you had to pivot your technical approach based on new hardware constraints.
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
How do you handle situations where requirements are underspecified or constantly changing?
How do you handle situations where requirements are underspecified or constantly changing?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
Discuss a technical failure you experienced and the specific steps you took to remediate it.
Discuss a technical failure you experienced and the specific steps you took to remediate it.
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
- 01
Tell me about a time you had to pivot your technical approach based on new hardware constraints.
- 02
How do you handle situations where requirements are underspecified or constantly changing?
- 03
Discuss a technical failure you experienced and the specific steps you took to remediate it.
Is the interview process strictly LeetCode-based?
While we do use coding challenges to assess fundamental skills, our process is heavily focused on real-world problem solving and system design. You should be prepared to discuss your past projects in great depth.
Saronic Technologies Software Engineer candidate reports ↗How long does the entire process take?
We aim to move quickly. From the initial recruiter screen to a final decision, the process can take anywhere from a few weeks to a month depending on scheduling.
Saronic Technologies Software Engineer candidate reports ↗What is the company culture like?
We pride ourselves on being mission-driven and focused. We value engineers who are self-starters, comfortable with ambiguity, and eager to solve "impossible" problems in a fast-paced environment.
Saronic Technologies Software Engineer candidate reports ↗How should I prepare for the onsite visit?
Treat the onsite visit as a full day of collaboration. Be prepared to whiteboard solutions, present your work, and engage in technical discussions with multiple members of the team.
Saronic Technologies Software Engineer candidate reports ↗What topics does Saronic Technologies test in interviews?
Saronic Technologies interviews most often cover Stakeholder Management, Cross-Functional Collaboration, Project Management, Business Analysis, and Autonomy software development. The exact emphasis depends on the specific role you apply for.
Saronic Technologies Software Engineer candidate reports ↗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.
- 01Saronic Technologies Software Engineer candidate reports ↗
Company-reported rounds, questions and FAQ.
Candidate reports · Accessed 2026-09-22 - 02PracHub Software Engineer practice ↗
PracHub practice material, not company-reported.
PracHub page · Accessed 2026-09-22 - 03PracHub preparation framework ↗
PracHub preparation guidance.
PracHub page · Accessed 2026-09-22
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