As a Software Engineer at Endeavor, you play a pivotal role in shaping innovative technology solutions that drive the company's mission forward. This position is integral not only to the development of software products but also to the enhancement of user experiences across various platforms. You will be collaborating with cross-functional teams to design, build, and maintain scalable systems that underpin the core functionalities of Endeavor's offerings. The impact of your work extends to both internal stakeholders and external customers, ensuring that the technology you develop meets user needs while aligning with business objectives. This role is particularly compelling due to the scale of operations and the complexity of systems involved, offering you the opportunity to solve significant challenges that can influence the company's strategic direction.
Recruiter Call
reportedBegin with a screening call with a recruiter to discuss your background and the role.
What to demonstrate
- Begin with a screening call with a recruiter to discuss your background and the role
- Depth in Interview technical questionnaires
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
reportedParticipate in interviews with technical team members to assess your technical capabilities.
What to demonstrate
- Participate in interviews with technical team members to assess your technical capabilities
- Depth in Interview technical questionnaires
How to prepare
- Answer aloud and timed: Describe a project where you implemented a complex algorithm. What challenges did you face?
- Answer aloud and timed: How do you ensure code quality and maintainability in your projects?
Hiring Manager Interview
reportedInterview with hiring managers focusing on problem-solving skills and cultural fit.
What to demonstrate
- Interview with hiring managers focusing on problem-solving skills and cultural fit
- Depth in Interview technical questionnaires
How to prepare
- Prepare two projects you led end to end, each with the decision you owned and what it cost.
- Have three questions about the team's roadmap and how success is measured in the first six months.
PracHub editorial advice for the preparation topics above.
Practice Coding
Regularly solve coding problems on platforms like LeetCode or HackerRank to sharpen your skills.
Understand the Company
Research Endeavor's mission, values, and recent projects to demonstrate your alignment with their goals during interviews.
Prepare STAR Stories
Use the STAR (Situation, Task, Action, Result) method to structure your behavioral interview responses effectively.
Ask Questions
Prepare insightful questions about the team, projects, and company culture to engage your interviewers and show your interest.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Describe a project where you implemented a complex algorithm. What challenges did you face?
Describe a project where you implemented a complex algorithm. What challenges did you face?
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?
Write a function to reverse a string in your preferred programming language.
Write a function to reverse a string in your preferred programming language.
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 implement a binary search algorithm? Explain its time complexity.
How would you implement a binary search algorithm? Explain its time complexity.
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?
Can you solve a basic problem involving data structures, such as arrays or linked lists?
Can you solve a basic problem involving data structures, such as arrays or linked lists?
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?
What are the key differences between a stack and a queue?
What are the key differences between a stack and a queue?
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?
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?
What programming languages are you most proficient in, and why?
What programming languages are you most proficient in, and why?
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?
Can you explain the difference between object-oriented and functional programming?
Can you explain the difference between object-oriented and functional programming?
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 ensure code quality and maintainability in your projects?
How do you ensure code quality and maintainability in your projects?
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 optimize a slow-running application?
How would you optimize a slow-running application?
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 steps would you take to improve the performance of a web application?
What steps would you take to improve the performance of a web application?
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?
Given a specific scenario, how would you prioritize tasks when multiple issues arise?
Given a specific scenario, how would you prioritize tasks when multiple issues arise?
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?
Can you walk us through your thought process when debugging a complex issue?
Can you walk us through your thought process when debugging a complex 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 Endeavor candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Endeavor loop
- Write out the reported sequence: Recruiter Call, Technical Interviews, Hiring Manager Interview.
- 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 Interview technical questionnaires
- Spend the session on Interview technical questionnaires, which Endeavor candidates report being tested on.
- Write one worked example in Interview technical questionnaires and time yourself on it.
Deliverable: One timed worked example in Interview technical questionnaires.
03Work Systems fundamentals
- Spend the session on Systems fundamentals, which Endeavor candidates report being tested on.
- Write one worked example in Systems fundamentals and time yourself on it.
Deliverable: One timed worked example in Systems fundamentals.
04Work Networking fundamentals
- Spend the session on Networking fundamentals, which Endeavor candidates report being tested on.
- Write one worked example in Networking fundamentals and time yourself on it.
Deliverable: One timed worked example in Networking fundamentals.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What programming languages are you most proficient in, and why?
- Answer aloud, timed: Can you explain the difference between object-oriented and functional programming?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Problem-Solving / Case Studies
- Answer aloud, timed: Describe a time when you encountered a significant bug in production. How did you resolve it?
- Answer aloud, timed: How would you optimize a slow-running application?
Deliverable: Spoken answers to 2 reported Problem-Solving / Case Studies question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Tell us about a time you had to work with a difficult team member. How did you handle it?
- Answer aloud, timed: Describe a situation where you had to lead a project. What was the outcome?
Deliverable: Spoken answers to 2 reported Behavioral / Leadership 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.
What is your experience with version control systems, particularly Git?
What is your experience with version control systems, particularly Git?
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 encountered a significant bug in production. How did you resolve it?
Describe a time when you encountered a significant bug in production. How did you resolve 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?
Tell us about a time you had to work with a difficult team member. How did you handle it?
Tell us about a time you had to work with a difficult team member. 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?
Describe a situation where you had to lead a project. What was the outcome?
Describe a situation where you had to lead a project. What was the outcome?
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 feedback, both giving and receiving?
How do you handle feedback, both giving and receiving?
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?
Can you provide an example of how you successfully managed competing priorities?
Can you provide an example of how you successfully managed competing priorities?
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 perform your best at work?
What motivates you to perform your best at work?
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 time when you needed to optimize an algorithm for better efficiency.
Discuss a time when you needed to optimize an algorithm for better efficiency.
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
What is your experience with version control systems, particularly Git?
- 02
Describe a time when you encountered a significant bug in production. How did you resolve it?
- 03
Tell us about a time you had to work with a difficult team member. How did you handle it?
- 04
Describe a situation where you had to lead a project. What was the outcome?
How difficult are the interviews, and how much preparation time is typical?
The interviews at Endeavor are moderately challenging. Candidates typically prepare for 2-4 weeks, focusing on both technical and behavioral aspects.
Endeavor Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates demonstrate a strong balance of technical skills, problem-solving abilities, and cultural fit. They are also effective communicators who can articulate their thought processes clearly.
Endeavor Software Engineer candidate reports ↗What is the culture and working style at Endeavor?
Endeavor fosters a collaborative and innovative culture where team members are encouraged to share ideas and take ownership of their work. A strong emphasis is placed on continuous learning and improvement.
Endeavor Software Engineer candidate reports ↗What is the typical timeline from the initial screen to an offer?
The timeline can vary, but candidates often receive feedback within a week after their first interview, with the entire process taking 3-4 weeks from screening to offer.
Endeavor Software Engineer candidate reports ↗Are there remote work or hybrid expectations?
Endeavor supports flexible working arrangements, including hybrid options, depending on the team's needs and individual circumstances.
Endeavor Software Engineer candidate reports ↗What topics does Endeavor test in interviews?
Endeavor interviews most often cover Problem Solving, Analytical Thinking, Data Analysis, Data Interpretation, and Stakeholder Management. The exact emphasis depends on the specific role you apply for.
Endeavor 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.
- 01Endeavor 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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