A Software Engineer at Ettain Group plays a vital role in developing robust software solutions that drive innovation and enhance user experiences. This position is integral to the company’s mission of delivering high-quality technology services to clients across various industries. As a Software Engineer, you'll be involved in designing, coding, and testing software applications, ensuring they meet functional and performance requirements. Your work directly impacts the products and services that Ettain Group offers, influencing user satisfaction and business success. This role is not only about writing code; it encompasses problem-solving, collaboration, and strategic thinking. You will engage with cross-functional teams, including product managers and quality assurance specialists, to develop solutions that address complex business challenges. With opportunities to work on diverse projects, you will contribute to the development of scalable systems and applications that enhance functionality and performance, making your work both challenging and rewarding.
Initial Screening
reportedA phone call with a recruiter to discuss your background, experiences, and general fit for the role.
What to demonstrate
- A phone call with a recruiter to discuss your background, experiences, and general fit for the role
- Depth in Software Engineering (General)
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 Interview
reportedA technical interview conducted over Zoom, including coding challenges or problem-solving scenarios.
What to demonstrate
- A technical interview conducted over Zoom
- Including coding challenges or problem-solving scenarios
How to prepare
- Answer aloud and timed: Can you explain a challenging technical problem you encountered and how you resolved it?
- Answer aloud and timed: What software development methodologies are you familiar with, and how have you applied them in your work?
Team Interviews
reportedInterviews with team members or stakeholders, focusing on both technical skills and cultural fit.
What to demonstrate
- Interviews with team members or stakeholders
- Focusing on both technical skills and cultural fit
How to prepare
- Answer aloud and timed: Discuss a time when you had to optimize an application for performance.
- Answer aloud and timed: Walk us through your thought process in designing a software solution for [specific problem scenario].
PracHub editorial advice for the preparation topics above.
Prepare for Behavioral Questions
Use the STAR (Situation, Task, Action, Result) method to structure your responses. This helps you present your experiences clearly and effectively.
Practice Coding Challenges
Familiarize yourself with common coding problems and algorithms. Use platforms like LeetCode or HackerRank to sharpen your skills.
Research the Company
Understand Ettain Group’s mission, values, and recent projects. This knowledge can help you tailor your responses and demonstrate your enthusiasm for the role.
Ask Insightful Questions
Prepare thoughtful questions for your interviewers that show your interest in the role and the company. This reflects your engagement and helps you assess if the company is the right fit for you.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to [specific coding problem].
Write a function to [specific coding 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?
How would you approach a problem involving data structures like trees or graphs?
How would you approach a problem involving data structures like trees or graphs?
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?
Discuss the time complexity of your solution to a coding problem you solved.
Discuss the time complexity of your solution to a coding problem you solved.
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 explain how you would test the performance of your code?
Can you explain how you would test the performance of your code?
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?
Stop tag and share joins from fanning out a page
resource_tag is (resource_id, tag_id) with PK (resource_id, tag_id); resource_share is (resource_id, shared_with_user_id, permission). The tagged-and-shared listing inner-joins resource to both, filters tenant_id, tag_id = ANY($2) and shared_with_user_id = $3, orders by updated_at DESC and takes 50. Pages come back with fewer than 50 distinct resources and the total in the header is far too high. Explain the row multiplication, rewrite both the page query and the count query so each is correct, and name the index each one needs. PostgreSQL 16.
Approach
- Do the arithmetic against the predicates that are actually there. An inner join emits one row per matching child row, and both joins are filtered: tag_id = ANY($2) admits only the requested tags, shared_with_user_id = $3 admits one user's share rows. So a resource holding three of the requested tags and shared with $3 once yields three rows, not one — the multiplier is its count of matching tags times its share rows for that single user, and that second factor is 1 unless the table admits duplicate (resource_id, shared_with_user_id) pairs. LIMIT 50 then limits rows rather than resources, and COUNT(*) counts pairs — the header is the product, not the population.
- Reject DISTINCT as the fix. It deduplicates after the product has been built, so the planner must materialise and sort the fanned-out set before the LIMIT can apply, and it leaves any SUM or AVG in the same select list wrong.
- Rewrite both filters as semi-joins, keeping resource as the only row source: AND EXISTS (SELECT 1 FROM resource_tag rt WHERE rt.resource_id = r.resource_id AND rt.tag_id = ANY($2)) and the same shape against resource_share. A semi-join stops at the first match per resource and preserves the driving index order, so ORDER BY updated_at DESC, resource_id DESC LIMIT 50 still stops after 50 rows.
- Count with the same predicates and no join at all: SELECT count(*) FROM resource r WHERE r.tenant_id = $1 AND r.status = 'active' AND EXISTS (...) AND EXISTS (...). Nothing multiplies a resource, so the number is the population.
Follow-up
- The filter changes from 'any of these tags' to 'all of these tags'. Rewrite it and state what it costs relative to the ANY form.
- A resource can be shared with the same user twice under different permissions. Does your count change, and should it?
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?
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?
Can you explain a challenging technical problem you encountered and how you resolved it?
Can you explain a challenging technical problem you encountered 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 software development methodologies are you familiar with, and how have you applied them in your work?
What software development methodologies are you familiar with, and how have you applied them in your 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?
Walk us through your thought process in designing a software solution for [specific problem scenario].
Walk us through your thought process in designing a software solution for [specific problem 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?
Describe a project where you had to quickly learn a new technology or framework. How did you handle it?
Describe a project where you had to quickly learn a new technology or framework. How did you handle 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?
If you were given a project with tight deadlines, how would you prioritize your tasks?
If you were given a project with tight deadlines, how would you prioritize your tasks?
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 approach debugging a complex issue in a live system?
How would you approach debugging a complex issue in a live system?
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 Ettain Group candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Ettain Group loop
- Write out the reported sequence: Initial Screening, Technical Interview, Team 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 Software Engineering (General)
- Spend the session on Software Engineering (General), which Ettain Group candidates report being tested on.
- Write one worked example in Software Engineering (General) and time yourself on it.
Deliverable: One timed worked example in Software Engineering (General).
03Work Product Ownership (Product Owner Experience)
- Spend the session on Product Ownership (Product Owner Experience), which Ettain Group candidates report being tested on.
- Write one worked example in Product Ownership (Product Owner Experience) and time yourself on it.
Deliverable: One timed worked example in Product Ownership (Product Owner Experience).
04Work Interview Process & Screening
- Spend the session on Interview Process & Screening, which Ettain Group candidates report being tested on.
- Write one worked example in Interview Process & Screening and time yourself on it.
Deliverable: One timed worked example in Interview Process & Screening.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: Describe your experience with [specific programming languages or technologies relevant to the role].
- Answer aloud, timed: How do you ensure code quality and maintainability in your projects?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Problem-solving / Case Studies
- Answer aloud, timed: Walk us through your thought process in designing a software solution for [specific problem scenario].
- Answer aloud, timed: How would you approach debugging a complex issue in a live system?
Deliverable: Spoken answers to 2 reported Problem-solving / Case Studies question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a situation where you had to work with a difficult team member. How did you handle it?
- Answer aloud, timed: What strategies do you use to communicate technical information to non-technical stakeholders?
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.
Describe your experience with [specific programming languages or technologies relevant to the role].
Describe your experience with [specific programming languages or technologies relevant to the role].
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 had to optimize an application for performance.
Discuss a time when you had to optimize an application for performance.
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 steps would you take to handle conflicting requirements from stakeholders?
What steps would you take to handle conflicting requirements from stakeholders?
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 work with a difficult team member. How did you handle it?
Describe a situation where 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?
What strategies do you use to communicate technical information to non-technical stakeholders?
What strategies do you use to communicate technical information to non-technical stakeholders?
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 share an example of a time when you took the lead on a project? What was the outcome?
Can you share an example of a time when you took the lead on 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 and criticism of your work?
How do you handle feedback and criticism of your 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?
What motivates you as a software engineer, and how do you stay updated with industry trends?
What motivates you as a software engineer, and how do you stay updated with industry trends?
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 is your experience with version control systems, and how do you use them in your projects?
What is your experience with version control systems, and how do you use them in your projects?
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
Describe your experience with [specific programming languages or technologies relevant to the role].
- 02
Discuss a time when you had to optimize an application for performance.
- 03
What steps would you take to handle conflicting requirements from stakeholders?
- 04
Describe a situation where you had to work with a difficult team member. How did you handle it?
How challenging is the interview process?
The interview process for the Software Engineer position is moderately challenging. Candidates typically require several weeks to prepare, focusing on both technical skills and behavioral competencies.
Ettain Group Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates often demonstrate a strong balance of technical proficiency, problem-solving skills, and the ability to collaborate effectively. They are also able to articulate their thought processes during problem-solving scenarios clearly.
Ettain Group Software Engineer candidate reports ↗What is the culture like at Ettain Group?
Ettain Group fosters a collaborative and inclusive culture that values innovation and continuous learning. Teamwork and open communication are essential components of the work environment.
Ettain Group Software Engineer candidate reports ↗How long does the hiring process typically take?
The timeline from initial screening to offer can vary, but it generally takes a few weeks. Candidates should be prepared for multiple rounds of interviews, including technical assessments and behavioral discussions.
Ettain Group Software Engineer candidate reports ↗Are there opportunities for remote work?
Ettain Group offers flexible work arrangements, including remote and hybrid options, depending on the role and team needs. Make sure to clarify your preferences during the interview process.
Ettain Group Software Engineer candidate reports ↗How can I stand out during my interviews?
To stand out, focus on showcasing your relevant experiences, demonstrating your problem-solving process, and aligning your values with those of Ettain Group. Be prepared to discuss your technical projects and how they relate to the position.
Ettain Group Software Engineer candidate reports ↗What topics does Ettain Group test in interviews?
Ettain Group interviews most often cover Problem Solving, Project Management, Coding Assessments, Sales Interview Preparation, and Software Engineering (General). The exact emphasis depends on the specific role you apply for.
Ettain Group 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.
- 01Ettain Group 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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