As a Software Engineer at Progressive Insurance, you play a vital role in building, maintaining, and scaling the technology platforms that power one of the largest and most innovative insurance providers in the United States. Your daily work directly impacts millions of customers, agents, and internal stakeholders who rely on seamless digital experiences, robust data pipelines, and high-performance backend systems. Whether you are developing modern cloud applications, integrating enterprise policy administration platforms like Duck Creek, or ensuring system reliability, your code helps drive a trillion-dollar industry forward through technical excellence. This position sits at the intersection of business agility and engineering rigor, requiring you to collaborate closely with product managers, data scientists, quality assurance teams, and engineering leadership. You will tackle complex technical challenges involving high-volume transaction processing, secure data handling, and modernizing legacy infrastructure. What makes this role particularly engaging is the scale of operations at combined with a culture that encourages continuous improvement, cross-functional collaboration, and professional growth. Progressive Insurance Expect a work environment that values stability, security, and smart automation, but be prepared for a deliberate, highly structured organizational rhythm.
Phone Screen
reportedInitial screening conducted by a recruiter to discuss background and role fit.
What to demonstrate
- Initial screening conducted by a recruiter to discuss background and role fit
- Depth in Behavioral Interviewing (STAR Method)
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.
Behavioral Interviews
reportedMultiple interviews focusing on behavioral questions to assess fit for the role and company culture.
What to demonstrate
- Multiple interviews focusing on behavioral questions to assess fit for the role and company culture
- Depth in Behavioral Interviewing (STAR Method)
How to prepare
- Prepare three examples from your own work, each with a decision you made and an outcome you can quantify.
- Re-read the description of the behavioral interviews above and write down what you would ask to confirm before it.
Technical Interviews
reportedInterviews with hiring managers and technical teams to evaluate technical skills and problem-solving abilities.
What to demonstrate
- Interviews with hiring managers and technical teams to evaluate technical skills and problem-solving abilities
- Depth in Behavioral Interviewing (STAR Method)
How to prepare
- Answer aloud and timed: Tell me about a time you had to resolve a conflict with a coworker or stakeholder.
- Answer aloud and timed: Describe a situation where you made a mistake on a project and how you handled the remediation and communication.
PracHub editorial advice for the preparation topics above.
Master the STAR format
Practice turning your past engineering projects into concise, structured stories that highlight your specific actions and the resulting business impact.
Keep your GitHub and resume polished
Interviewers frequently review your professional background and project history before technical conversations, so be prepared to discuss every line on your resume in detail.
Embrace the conversational tone
Approach the technical interview as a peer-to-peer engineering discussion rather than an interrogation; interviewers appreciate genuine technical curiosity and collaborative problem-solving.
Ask insightful questions
Use the time at the end of each interview to ask thoughtful questions about team culture, engineering practices, and deployment pipelines to demonstrate your engagement.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Merge partitioned event streams into one ordered feed with bounded lateness
The read-model service consumes 64 log partitions carrying about 4,000 events per second in total. Each partition is ordered within itself, but partitions drift by up to 30 seconds, and the activity feed must present a tenant's events in occurred_at order. Produce the merge. State its complexity, the buffer it requires in events and in bytes, what happens when one partition is idle, and what you do with an event that arrives after you have already emitted its position. Payloads average 1 KB.
Approach
- Merge with a min-heap over the 64 partition heads keyed on (occurred_at, event_id): O(log P) per event and O(n log P) overall. The tie-break on event_id is what makes the output deterministic when two partitions carry the same millisecond, which matters because the feed is paginated and a non-deterministic order reorders pages under the reader.
- Emitting the heap head is only correct once every partition has produced everything up to that timestamp, so the emit condition is a watermark: the minimum across partitions of the highest occurred_at seen, less the allowed lateness. Events are held until the watermark passes them, which is what turns individually ordered streams into a jointly ordered one.
- Size the buffer from the lateness rather than guessing: 4,000 events per second times 30 seconds is 120,000 buffered events, and at 1 KB each about 120 MB of heap. That number is the real price of the ordering guarantee and belongs in front of whoever asked for it.
- Handle the idle partition explicitly, because it fails the feed rather than corrupting it: a partition with no traffic never advances its own maximum, so the watermark freezes and output stops entirely. Either every partition emits a periodic idle marker carrying the broker's current time, or the watermark falls back to wall clock for a partition silent beyond a threshold.
Follow-up
- The lateness budget is raised to five minutes. What is the new buffer, and what besides memory changes?
- The consumer restarts. Where does it resume from, and what does the feed look like for the first 30 seconds?
Canonicalise a request body into a stable idempotency fingerprint
idempotency_key.request_fingerprint is a SHA-256 over the method, path and canonicalised body, and a retry whose fingerprint differs must be rejected with 422 rather than served the stored response. Write the canonicaliser. Bodies are JSON up to 256 KB nested at most 32 levels; clients vary key order, whitespace and unicode escaping, and some send 64-bit ids as JSON numbers. Produce a deterministic byte string such that semantically identical bodies match and any semantic difference does not. State your complexity and name two normalisations you refuse to perform.
Approach
- Parse once into a tree, then re-serialise under fixed rules: object keys sorted, array order preserved, one escaping convention, no insignificant whitespace. Parsing is O(n) and sorting keys is O(k log k) per object, so O(n log n) overall with O(depth) stack, and the 32-level cap is enforced during parsing because hostile nesting is how a canonicaliser becomes a stack overflow.
- Sort keys by their UTF-8 bytes and say why the obvious implementation is wrong in some runtimes: a default string comparison that orders by UTF-16 code units places surrogate pairs, meaning code points from U+10000 up, below U+E000 to U+FFFF, which is not UTF-8 byte order, so two services written in different languages disagree on the same document.
- Do not re-encode numbers through a double. IEEE-754 binary64 represents integers exactly only up to 2^53, so normalising a 19-digit id through a float changes it, and 1 against 1.0 cannot be reconciled without deciding whether they are the same value. Preserve the literal token, and require ids as strings at the API boundary if you want them comparable.
- Reject duplicate keys rather than picking one. JSON permits them and parsers disagree, most keeping the last, so any choice you make ties the fingerprint to a parser detail that the code handling the request does not necessarily share.
Follow-up
- A client sends the same logical request with an extra field your API ignores. Same key, different fingerprint, so you return 422. Is that the right answer?
- Where does the fingerprint get computed relative to request decompression and the body-size limit?
Diff a projection against the primary without per-row point reads
The listing projection has drifted and some rows show a stale version. The primary holds 40,000,000 resource rows across 12,000 tenants while serving 1,200 writes and 14,000 reads per second. The obvious repair, reading each resource row and comparing its version against the projection, is correct and would eventually finish. Explain precisely why it is unacceptable here, then give a diff that finds the differing rows, state its complexity, and make it safe to run against a live primary. Replication lag is usually under 100 ms and is not bounded.
Approach
- Quantify the naive cost rather than calling it slow: 40,000,000 point reads at even 0.5 ms each is over five hours serialised, and the only lever is concurrency, which is exactly what you cannot spend. The primary's pool is sized for the write path, and 40,000,000 random reads evict the buffer cache that sustains the 85 percent cache hit rate, so the audit degrades the system it is auditing.
- Replace random access with one ordered pass per side. Both sides can be read in (tenant_id, resource_id) order, which is a sequential scan on each and a merge join in O(n) time and O(1) memory. For a dense diff that is the whole answer, and it reads the primary once instead of 40,000,000 times.
- For the expected sparse case, compare range hashes instead of rows: partition the key space, compute per range an order-independent aggregate over hash(resource_id, version), compare aggregates, and descend only into ranges that differ. With d differing rows and branching factor B, at most d ranges mismatch per level, so the drill-down examines O(d log_B(n/d)) ranges and reads full rows only in mismatching leaves.
- Aggregate with a sum modulo 2^64 or a multiset hash, never XOR. XOR is order-independent but self-cancelling, so two rows wrong in the same way, or a row duplicated on one side, leave the range aggregate matching and the range is declared clean.
Follow-up
- The diff reports 900 stale rows. How do you decide between patching those rows and rebuilding the projection from resource_revision?
- Same job, but the projection lives in a search index that cannot be scanned in key order. What changes?
Why do you want to join Progressive Insurance and how does your career path align with our mission?
Why do you want to join Progressive Insurance and how does your career path align with our mission?
Approach
- Name the grain you start from and join outward from it.
- Check whether any join is one-to-many before aggregating, or the sums inflate.
- Say which index the query would use, and what makes it unusable.
- Handle the rows that do not match: that is usually the actual question.
Follow-up
- How does the query change if that join becomes one-to-many?
- What happens to this when the table is ten times larger?
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?
These questions evaluate your command of core computer science concepts, object-oriented programming principle
These questions evaluate your command of core computer science concepts, object-oriented programming principles, and your specific technology stack without relying on live coding puzzles.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Are you familiar with SOLID principles, and can you explain how you apply them in your daily development work?
Are you familiar with SOLID principles, and can you explain how you apply them in your daily development work?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
What are the four core principles of object-oriented programming and how do they manifest in your preferred la
What are the four core principles of object-oriented programming and how do they manifest in your preferred language?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Explain a data pipeline you have built and discuss how you would improve its performance or reliability.
Explain a data pipeline you have built and discuss how you would improve its performance or reliability.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
What database topics or window functions would you utilize to solve a complex aggregation or reporting scenari
What database topics or window functions would you utilize to solve a complex aggregation or reporting scenario?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Walk me through the core architecture of an application you recently shipped and the technical trade-offs you
Walk me through the core architecture of an application you recently shipped and the technical trade-offs you made.
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?
Walk me through your process for evaluating a new third-party library or framework for an enterprise project.
Walk me through your process for evaluating a new third-party library or framework for an enterprise project.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
How do you balance technical debt reduction with the delivery of new feature requests from business stakeholde
How do you balance technical debt reduction with the delivery of new feature requests from business stakeholders?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
These prompts assess your analytical approach, troubleshooting mindset, and how you handle ambiguous technical
These prompts assess your analytical approach, troubleshooting mindset, and how you handle ambiguous technical challenges.
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?
How do you approach debugging a critical production issue when logs are sparse and time is running out?
How do you approach debugging a critical production issue when logs are sparse and time is running out?
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 Progressive Insurance candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Progressive Insurance loop
- Write out the reported sequence: Phone Screen, Behavioral Interviews, Technical Interviews.
- 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 3 reported rounds, with the weakest marked.
02Work Behavioral Interviewing (STAR Method)
- Spend the session on Behavioral Interviewing (STAR Method), which Progressive Insurance candidates report being tested on.
- Write one worked example in Behavioral Interviewing (STAR Method) and time yourself on it.
Deliverable: One timed worked example in Behavioral Interviewing (STAR Method).
03Work Asynchronous Video Interviewing
- Spend the session on Asynchronous Video Interviewing, which Progressive Insurance candidates report being tested on.
- Write one worked example in Asynchronous Video Interviewing and time yourself on it.
Deliverable: One timed worked example in Asynchronous Video Interviewing.
04Work Object-Oriented Programming (OOP)
- Spend the session on Object-Oriented Programming (OOP), which Progressive Insurance candidates report being tested on.
- Write one worked example in Object-Oriented Programming (OOP) and time yourself on it.
Deliverable: One timed worked example in Object-Oriented Programming (OOP).
05Answer out loud: Behavioral and Situational (STAR Method)
- Answer aloud, timed: Expect questions that test your interpersonal skills, conflict resolution, and ability to collaborate across teams using structured narrative frameworks.
- Answer aloud, timed: Why do you want to join Progressive Insurance and how does your career path align with our mission?
Deliverable: Spoken answers to 2 reported Behavioral and Situational (STAR Method) question(s), under time.
06Answer out loud: Technical and Domain Knowledge
- Answer aloud, timed: These questions evaluate your command of core computer science concepts, object-oriented programming principles, and your specific technology stack without relying on live coding puzzles.
- Answer aloud, timed: Are you familiar with SOLID principles, and can you explain how you apply them in your daily development work?
Deliverable: Spoken answers to 2 reported Technical and Domain Knowledge question(s), under time.
07Answer out loud: Problem-Solving and Collaboration
- Answer aloud, timed: These prompts assess your analytical approach, troubleshooting mindset, and how you handle ambiguous technical challenges.
- Answer aloud, timed: How do you approach debugging a critical production issue when logs are sparse and time is running out?
Deliverable: Spoken answers to 2 reported Problem-Solving and Collaboration 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.
Expect questions that test your interpersonal skills, conflict resolution, and ability to collaborate across t
Expect questions that test your interpersonal skills, conflict resolution, and ability to collaborate across teams using structured narrative frameworks.
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?
Tell me about a time you helped someone at work learn a new technology or skill.
Tell me about a time you helped someone at work learn a new technology or skill.
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?
Describe a challenging situation where project requirements changed suddenly and how you managed the team resp
Describe a challenging situation where project requirements changed suddenly and how you managed the team response.
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?
Tell me about a time you had to resolve a conflict with a coworker or stakeholder.
Tell me about a time you had to resolve a conflict with a coworker or stakeholder.
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?
Describe a situation where you made a mistake on a project and how you handled the remediation and communicati
Describe a situation where you made a mistake on a project and how you handled the remediation and communication.
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?
Describe a time when you had to onboard onto an unfamiliar codebase or legacy system quickly.
Describe a time when you had to onboard onto an unfamiliar codebase or legacy system quickly.
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
Expect questions that test your interpersonal skills, conflict resolution, and ability to collaborate across teams using structured narrative frameworks.
- 02
Tell me about a time you helped someone at work learn a new technology or skill.
- 03
Describe a challenging situation where project requirements changed suddenly and how you managed the team response.
- 04
Tell me about a time you had to resolve a conflict with a coworker or stakeholder.
How difficult is the interview process and how much preparation time is recommended?
The overall difficulty is moderate, but the process is notably lengthy and structured. We recommend dedicating at least two weeks to gather and refine your STAR stories and review core computer science fundamentals.
Progressive Insurance Software Engineer candidate reports ↗Are there live coding tests like LeetCode during the technical rounds?
No. Progressive intentionally avoids live algorithmic coding puzzles and LeetCode-style gotchas during technical interviews. Instead, discussions focus on your resume projects, object-oriented principles, and architectural reasoning.
Progressive Insurance Software Engineer candidate reports ↗What is the biggest differentiator for successful candidates?
The single biggest differentiator is the quality and structure of your behavioral interview answers. Candidates who master the STAR format and communicate clearly about their teamwork and problem-solving stand out immediately.
Progressive Insurance Software Engineer candidate reports ↗How long does the entire interview process take from start to offer?
The timeline can span anywhere from four to six weeks due to the multi-stage format, which includes video screenings, recruiter discussions, and multiple panel interviews with engineering teams and managers.
Progressive Insurance Software Engineer candidate reports ↗Does Progressive support remote work for Software Engineers?
Work arrangements can vary by specific team and location, with many roles offering hybrid flexibility. Be sure to clarify current workplace policies with your recruiter during the initial screening call.
Progressive Insurance Software Engineer candidate reports ↗What topics does Progressive Insurance test in interviews?
Progressive Insurance interviews most often cover Behavioral Interviewing, Communication Skills, Stakeholder Management, Behavioral Interviewing (STAR Method), and Problem Solving. The exact emphasis depends on the specific role you apply for.
Progressive Insurance 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.
- 01Progressive Insurance 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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