As a Software Engineer at Oxa, you are at the forefront of autonomous mobility. This role is not just about writing code; it is about solving complex, real-world challenges in robotics, sensor fusion, and autonomous navigation. You will be contributing to a platform that demands high reliability, safety, and performance, working alongside a multidisciplinary team of engineers and researchers to bring autonomous solutions to complex environments. The impact of your work is direct and significant. You will be building the software infrastructure that allows autonomous vehicles to perceive, reason, and act in dynamic scenarios. Whether you are working on core navigation algorithms, data processing pipelines, or system-level architecture, your efforts directly influence the safety and efficiency of Oxa’s fleet. This position offers the rare opportunity to work at the intersection of cutting-edge research and commercial deployment, making it ideal for engineers who thrive on technical complexity and mission-driven innovation. ##### Tip Oxa values technical depth, but it is equally important to demonstrate a collaborative mindset. The team is highly supportive, and they look for candidates who are not only skilled coders but also excellent team players.
Recruiter Screening Call
reportedInitial call with a recruiter to assess candidate fit and discuss the role.
What to demonstrate
- Initial call with a recruiter to assess candidate fit and discuss the role
- Depth in Behavioral interviews
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 Interviews
reportedInterviews with team members and leads involving live coding challenges and project discussions.
What to demonstrate
- Interviews with team members and leads involving live coding challenges and project discussions
- Depth in Behavioral interviews
How to prepare
- Answer aloud and timed: What are the trade-offs between different data structures in the context of real-time processing?
- Answer aloud and timed: How would you design a system to handle high-frequency sensor data ingestion?
Behavioral Interviews
reportedInterviews focused on leadership principles and past experiences.
What to demonstrate
- Interviews focused on leadership principles and past experiences
- Depth in Behavioral interviews
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.
PracHub editorial advice for the preparation topics above.
Communicate Proactively
If you have a question about the process or the role, don't hesitate to ask your recruiter. Clarity is a two-way street.
Show Your Work
In coding tasks, walk the interviewer through your logic. They want to see how you arrive at a solution, not just the final result.
Know Your Resume
Be prepared to discuss every project on your CV in detail, including the challenges you faced and the specific technical decisions you made.
Research the Company
Familiarize yourself with Oxa's recent milestones and the specific challenges of autonomous driving to show your passion for the industry.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Can you solve this medium-difficulty LeetCode-style problem using C++ or Python?
Can you solve this medium-difficulty LeetCode-style problem using C++ or Python?
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 specific piece of code to improve latency?
How would you optimize this specific piece of code to improve latency?
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?
Given a piece of legacy code, how would you identify areas for improvement and refactoring?
Given a piece of legacy code, how would you identify areas for improvement and refactoring?
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 why the owner filter ignores the listing index
The only index on resource is (tenant_id, status, updated_at DESC, resource_id DESC). A new endpoint returns one user's resources across all statuses, newest created first: WHERE tenant_id = $1 AND owner_user_id = $2 ORDER BY created_at DESC LIMIT 20. On a tenant with 2M rows it takes 900 ms and EXPLAIN shows a sort above a large scan. Explain precisely why the existing index cannot serve it, give the index that can, and state which of these the new index still will not help: owner_user_id alone across tenants; the same query ordered by updated_at. PostgreSQL 16.
Approach
- Separate the two jobs an index does. For filtering, a composite btree is seekable only on a left prefix, so with no predicate on status the scan can at best range over tenant_id and test owner_user_id per row; PostgreSQL 16 has no btree skip scan to jump the unconstrained column.
- For ordering, the index is sorted by (status, updated_at) within a tenant and not by created_at, so the LIMIT cannot stop early: every matching row is read and then sorted. That is the 'Sort Method: top-N heapsort' line, and it is why the plan reads 2M rows to answer with 20.
- Derive the replacement from the access path — equality, equality, then the ordering column: CREATE INDEX CONCURRENTLY ON resource (tenant_id, owner_user_id, created_at DESC). The scan seeks to the (tenant, owner) range and walks 20 entries in order, so the Sort node disappears along with the row-read.
- Treat INCLUDE (title, status) as conditional, not free. An index-only scan still visits the heap for any row whose page is not marked all-visible, so on a table taking 1.2k writes/second the win depends on autovacuum keeping the visibility map current, and the wider index costs more on every insert.
Follow-up
- 90% of rows are status='active'. Would a partial index WHERE status = 'active' change your answer, and for which of the three queries?
- A dashboard runs this for 40 owners in one page load. What changes about the design?
Write the update path that detects a concurrent edit
resource carries version INT NOT NULL DEFAULT 1. resource_revision holds revision_id, resource_id, version, actor_user_id, change_kind, patch JSONB, request_id, created_at with UNIQUE (resource_id, version). outbox_event holds aggregate_type, aggregate_id, aggregate_version, event_type, payload, status. A PUT carries the version the client read. Write the exact statements for the single transaction that applies the edit, records the revision and enqueues 'resource.updated', and give the handler's branch on zero affected rows. Then say what PostgreSQL 16 does under READ COMMITTED when two of these updates hit one row at once.
Approach
- One transaction, three writes, no network call inside it: UPDATE resource SET title = $3, version = version + 1, updated_at = now() WHERE resource_id = $1 AND tenant_id = $4 AND version = $2; then INSERT the resource_revision row at version $2 + 1; then INSERT the outbox_event row at the same aggregate_version. The event goes to a table rather than a broker because no transaction spans both.
- Branch on the affected-row count before doing anything else. Zero has three causes — stale version, wrong tenant, row gone — so re-read once and map to 409 carrying the current version, or 404 for an id outside the caller's tenant, which also stops the endpoint confirming that another tenant's id exists.
- State the engine behaviour instead of assuming it. Under READ COMMITTED the second UPDATE blocks on the row lock, and when the first commits PostgreSQL re-evaluates the WHERE clause against the newly committed row, so the version predicate now fails and the statement reports zero rows. Under REPEATABLE READ the identical collision raises SQLSTATE 40001 instead, so the handler must fold both shapes into one conflict response.
- Keep UNIQUE (resource_id, version) even though the predicate already serialises writers. It is what makes a lost update unwritable if any other path ever reaches the revision table, and it converts a logic bug into 23505 rather than into a silently missing history row.
Follow-up
- A client sends the version it read ten minutes ago and the resource has moved three versions. What is in your 409 so it can resolve the conflict without a full re-fetch?
- Two editors, two disjoint fields, no overlap. Does your answer still refuse the second write, and should it?
Can you walk us through a complex technical challenge you faced and how you resolved it?
Can you walk us through a complex technical challenge you faced and how you resolved it?
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 trade-offs between different data structures in the context of real-time processing?
What are the trade-offs between different data structures in the context of real-time processing?
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 would you design a system to handle high-frequency sensor data ingestion?
How would you design a system to handle high-frequency sensor data ingestion?
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 how you would fetch and manipulate data from an API in a React/Frontend context.
Walk me through how you would fetch and manipulate data from an API in a React/Frontend context.
Approach
- Say who the caller is and what they do when the call fails halfway.
- Define the identity of a request so a retry cannot double-apply it.
- Separate accepted, pending, failed and confirmed; they are different facts.
- Design the error taxonomy before the success shape; callers branch on it.
Follow-up
- What happens if the caller retries after a timeout?
- How does a client discover it is on an old version of this contract?
How do you ensure your code is maintainable and testable in a large, distributed codebase?
How do you ensure your code is maintainable and testable in a large, distributed codebase?
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 approach debugging a memory leak or a performance bottleneck in a resource-constrained environment?
How do you approach debugging a memory leak or a performance bottleneck in a resource-constrained environment?
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 Oxa candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Oxa loop
- Write out the reported sequence: Recruiter Screening Call, Technical Interviews, Behavioral 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 interviews
- Spend the session on Behavioral interviews, which Oxa candidates report being tested on.
- Write one worked example in Behavioral interviews and time yourself on it.
Deliverable: One timed worked example in Behavioral interviews.
03Work Leadership principles / leadership behaviors
- Spend the session on Leadership principles / leadership behaviors, which Oxa candidates report being tested on.
- Write one worked example in Leadership principles / leadership behaviors and time yourself on it.
Deliverable: One timed worked example in Leadership principles / leadership behaviors.
04Work STAR method
- Spend the session on STAR method, which Oxa candidates report being tested on.
- Write one worked example in STAR method and time yourself on it.
Deliverable: One timed worked example in STAR method.
05Answer out loud: Technical and Domain Knowledge
- Answer aloud, timed: Can you walk us through a complex technical challenge you faced and how you resolved it?
- Answer aloud, timed: How do you approach debugging a memory leak or a performance bottleneck in a resource-constrained environment?
Deliverable: Spoken answers to 2 reported Technical and Domain Knowledge question(s), under time.
06Answer out loud: Coding and Problem Solving
- Answer aloud, timed: Can you solve this medium-difficulty LeetCode-style problem using C++ or Python?
- Answer aloud, timed: How would you optimize this specific piece of code to improve latency?
Deliverable: Spoken answers to 2 reported Coding and Problem Solving question(s), under time.
07Answer out loud: Behavioral and Leadership Principles
- Answer aloud, timed: Tell me about a time you had to disagree with a technical decision; how did you handle it?
- Answer aloud, timed: How do you prioritize tasks when working on multiple high-impact projects simultaneously?
Deliverable: Spoken answers to 2 reported Behavioral and Leadership Principles 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.
Can you explain your experience with Linux and its role in embedded or real-time systems?
Can you explain your experience with Linux and its role in embedded or real-time systems?
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 disagree with a technical decision; how did you handle it?
Tell me about a time you had to disagree with a technical decision; how did you handle 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?
How do you prioritize tasks when working on multiple high-impact projects simultaneously?
How do you prioritize tasks when working on multiple high-impact projects simultaneously?
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 had to learn a new technology quickly to solve a problem.
Describe a situation where you had to learn a new technology quickly to solve a problem.
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 contribute to a positive and inclusive team environment?
How do you contribute to a positive and inclusive team environment?
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?
What motivates you to work in the field of autonomous vehicles?
What motivates you to work in the field of autonomous vehicles?
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
Can you explain your experience with Linux and its role in embedded or real-time systems?
- 02
Tell me about a time you had to disagree with a technical decision; how did you handle it?
- 03
How do you prioritize tasks when working on multiple high-impact projects simultaneously?
- 04
Describe a situation where you had to learn a new technology quickly to solve a problem.
How long does the interview process usually take?
The process can vary, but it often spans several weeks due to the number of stages involved. It is common for the process to take 4–7 weeks from the initial screen to a final decision.
Oxa Software Engineer candidate reports ↗What is the best way to prepare for the coding challenges?
Focus on standard data structures and algorithms, but prioritize readability and clean code over clever, obscure solutions. If you are interviewing for a role involving robotics, ensure you are comfortable with C++ memory management.
Oxa Software Engineer candidate reports ↗Are the behavioral questions difficult?
They are not "trick" questions; they are designed to understand your past behavior and alignment with Oxa's values. Using the STAR method to provide structured, clear examples will serve you well.
Oxa Software Engineer candidate reports ↗Is the technical interview "hostile"?
Most candidates describe the interviewers as friendly and supportive. While the technical questions are challenging, the environment is generally intended to be an open discussion rather than an interrogation.
Oxa Software Engineer candidate reports ↗What topics does Oxa test in interviews?
Oxa interviews most often cover Python, API Design, Behavioral interviews, Data Engineering for ML systems, and Multimodal sensor data. The exact emphasis depends on the specific role you apply for.
Oxa 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.
- 01Oxa 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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