As a Software Engineer at InMoment, you play a vital role in shaping the technology that drives our customer experience solutions. Your work directly impacts how we gather, analyze, and act on customer feedback, which is crucial for businesses striving to improve their offerings and enhance customer satisfaction. This position is not just about writing code; it’s about contributing to a holistic understanding of user needs, optimizing the performance of our platforms, and innovating solutions that scale. The Software Engineer is integral to various projects, ranging from developing new features on our analytics platform to enhancing our data processing capabilities. You will collaborate closely with cross-functional teams, including product managers and data scientists, to deliver high-quality software that meets the demands of our dynamic industry. This role offers the opportunity to engage in complex problem-solving and work on cutting-edge technologies, making it both exciting and impactful. Expect to be challenged intellectually while also having the chance to contribute significantly to the company’s success. The work you do will not only influence our products but also shape how organizations leverage customer insights to drive their strategies.
HR Screening Call
reportedInitial call to assess candidate's background and fit for the role.
What to demonstrate
- Initial call to assess candidate's background and fit for the role
- Depth in Programming (coding exercises)
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 that may include coding challenges and system design discussions.
What to demonstrate
- Interviews that may include coding challenges and system design discussions
- Depth in Programming (coding exercises)
How to prepare
- Answer aloud and timed: Describe your experience with cloud-based platforms such as AWS or Azure.
- Answer aloud and timed: What are the key considerations when designing a RESTful API?
Phone Interviews
reportedA mix of phone interviews with team members to evaluate technical skills.
What to demonstrate
- A mix of phone interviews with team members to evaluate technical skills
- Depth in Programming (coding exercises)
How to prepare
- Answer aloud and timed: Can you explain the concept of microservices architecture?
- Answer aloud and timed: Write a function to reverse a linked list.
On-site Interviews
reportedIn-person interviews that may involve discussions with multiple team members.
What to demonstrate
- In-person interviews that may involve discussions with multiple team members
- Depth in Programming (coding exercises)
How to prepare
- Answer aloud and timed: How would you implement a binary search algorithm?
- Answer aloud and timed: Given a list of integers, write a function to find the two numbers that add up to a specific target.
PracHub editorial advice for the preparation topics above.
Understand the company’s products
Familiarize yourself with InMoment’s offerings and how they serve clients. This will help you tailor your responses during the interview.
Practice coding on a whiteboard
Many interviews may involve whiteboard coding exercises. Practice explaining your thought process as you solve problems.
Be ready for behavioral questions
Prepare examples from your past experiences that demonstrate your skills and how you handle challenges.
Align with company values
Research InMoment’s core values and think about how your experiences align with them. This can help you demonstrate cultural fit.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to reverse a linked list.
Write a function to reverse a linked list.
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?
How would you implement a binary search algorithm?
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 list of integers, write a function to find the two numbers that add up to a specific target.
Given a list of integers, write a function to find the two numbers that add up to a specific target.
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?
Describe how you would handle concurrency in a web application.
Describe how you would handle concurrency in a web application.
Approach
- Say what the runtime actually does before reasoning about the code.
- Name what is shared across threads and what owns each piece of state.
- Identify the window where an invariant is briefly untrue.
- Distinguish a value from a reference to it, and say which one you handed out.
Follow-up
- What happens if two callers reach this at the same time?
- Where could this allocate more than you expect?
Implement a caching mechanism to improve performance.
Implement a caching mechanism to improve performance.
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 a slow-running SQL query?
How would you optimize a slow-running SQL query?
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?
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?
Explain the difference between object-oriented and functional programming.
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?
What are the key considerations when designing a RESTful API?
What are the key considerations when designing a RESTful API?
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?
Can you explain the concept of microservices architecture?
Can you explain the concept of microservices architecture?
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?
You are tasked with improving the performance of an existing application. What steps would you take?
You are tasked with improving the performance of an existing application. What steps would you take?
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 the design of a new feature for our analytics platform?
How would you approach the design of a new feature for our analytics platform?
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?
Suppose you notice a significant drop in user engagement in one of our products. What analysis would you perfo
Suppose you notice a significant drop in user engagement in one of our products. What analysis would you perform to diagnose the issue?
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?
Design a system that can process and analyze large volumes of customer feedback data.
Design a system that can process and analyze large volumes of customer feedback data.
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
How would you design an application to handle millions of concurrent users?
How would you design an application to handle millions of concurrent users?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Discuss the trade-offs between using a monolithic versus microservices architecture in a large-scale applicati
Discuss the trade-offs between using a monolithic versus microservices architecture in a large-scale application.
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Describe how you would ensure data integrity and consistency in a distributed system.
Describe how you would ensure data integrity and consistency in a distributed system.
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?
What strategies would you use to scale a web application?
What strategies would you use to scale a web application?
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?
p99 jumped on one listing filter while p50 stayed flat
After a release that added an owner_user_id filter to the resource listing, p99 rose from 90 ms to 1.9 s while p50 stayed at 40 ms. Traffic and row counts are unchanged. resource carries the index (tenant_id, status, updated_at DESC, resource_id DESC). The new query filters tenant_id and owner_user_id, orders by updated_at DESC, resource_id DESC, and takes 20 rows. On PostgreSQL, explain the shape of the regression, prove it from a query plan, and give the index you would add.
Approach
- Start from the shape. A flat p50 with a moved p99 means a subset of requests changed cost, not all of them, so the first job is naming the subset. Bucket the endpoint's latency by the tenant's row count; the natural hypothesis is that large tenants are a small share of requests and all of the tail.
- Get the plan for the new query on a large tenant with EXPLAIN (ANALYZE, BUFFERS). Expect an index scan over the tenant's range, a filter discarding most of it, then a Sort feeding the Limit, possibly reporting Sort Method: external merge Disk. Read actual rows on the scan node, not estimated.
- Explain why the existing index cannot serve it. A composite B-tree is seekable only as a left prefix, and with no equality predicate on status the scan cannot treat updated_at as an ordering, because rows in the tenant's range are ordered by status first. Everything matching must be read and sorted before LIMIT 20 can apply, so a tenant with 400,000 rows pays 400,000 rows to return 20.
- Add (tenant_id, owner_user_id, updated_at DESC, resource_id DESC). Equality on the first two columns leaves the index ordered by updated_at within that pair, so the plan becomes an index scan that stops after 20 rows with no Sort node. PostgreSQL can scan a B-tree backwards, so the DESC markers matter only if the two sort columns ever disagree in direction; keeping them explicit documents the order the keyset cursor depends on.
Follow-up
- The endpoint paginates with OFFSET. What does page 500 cost with your index, and what does the keyset version cost?
- How would you have caught this before release, given that a 10,000-row seed database produces the same plan shape at an unnoticeable cost?
Built from the rounds and topics InMoment candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the InMoment loop
- Write out the reported sequence: HR Screening Call, Technical Interviews, Phone Interviews, On-site 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 4 reported rounds, with the weakest marked.
02Work Programming (coding exercises)
- Spend the session on Programming (coding exercises), which InMoment candidates report being tested on.
- Write one worked example in Programming (coding exercises) and time yourself on it.
Deliverable: One timed worked example in Programming (coding exercises).
03Work Problem Solving
- Spend the session on Problem Solving, which InMoment candidates report being tested on.
- Write one worked example in Problem Solving and time yourself on it.
Deliverable: One timed worked example in Problem Solving.
04Work NLP (Natural Language Processing)
- Spend the session on NLP (Natural Language Processing), which InMoment candidates report being tested on.
- Write one worked example in NLP (Natural Language Processing) and time yourself on it.
Deliverable: One timed worked example in NLP (Natural Language Processing).
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: Explain the difference between object-oriented and functional programming.
- Answer aloud, timed: How would you optimize a slow-running SQL query?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Coding / Algorithms
- Answer aloud, timed: Write a function to reverse a linked list.
- Answer aloud, timed: How would you implement a binary search algorithm?
Deliverable: Spoken answers to 2 reported Coding / Algorithms question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a challenging project you worked on and how you handled obstacles.
- Answer aloud, timed: How do you prioritize tasks when facing tight deadlines?
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 cloud-based platforms such as AWS or Azure.
Describe your experience with cloud-based platforms such as AWS or Azure.
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 project you worked on and how you handled obstacles.
Describe a challenging project you worked on and how you handled obstacles.
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 facing tight deadlines?
How do you prioritize tasks when facing tight deadlines?
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?
Give an example of a time when you had to work with a difficult colleague.
Give an example of a time when you had to work with a difficult colleague.
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 ensure effective communication within a team?
How do you ensure effective communication within a team?
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.
Describe a situation where you had to learn a new technology 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?
Describe a time when your solution to a problem was not successful. What did you learn from that experience?
Describe a time when your solution to a problem was not successful. What did you learn from that experience?
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 would you handle conflicting requirements from different stakeholders?
How would you handle conflicting requirements from different 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?
- 01
Describe your experience with cloud-based platforms such as AWS or Azure.
- 02
Describe a challenging project you worked on and how you handled obstacles.
- 03
How do you prioritize tasks when facing tight deadlines?
- 04
Give an example of a time when you had to work with a difficult colleague.
What is the typical interview difficulty and preparation time?
The interview process for a Software Engineer at InMoment is generally considered average in difficulty. Candidates typically spend 2-4 weeks preparing, focusing on technical skills and behavioral questions.
InMoment Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates demonstrate a strong technical foundation, excellent problem-solving abilities, and the capacity to work collaboratively. They also align well with the company’s values and culture.
InMoment Software Engineer candidate reports ↗What can you tell me about the culture at InMoment?
InMoment promotes a collaborative and innovative culture, where employees are encouraged to share ideas and feedback. The company values user-centric thinking and strives to create an inclusive work environment.
InMoment Software Engineer candidate reports ↗How long does the typical interview process take?
The overall timeline can vary, but candidates can expect the process to take between 4-6 weeks from initial screening to final offer.
InMoment Software Engineer candidate reports ↗Are there remote work options available?
InMoment offers flexible working arrangements, including remote and hybrid options, depending on the specific role and team requirements.
InMoment Software Engineer candidate reports ↗How should I approach technical questions during the interview?
Be prepared to think aloud and explain your reasoning process. Interviewers are interested in understanding your thought process as much as your final answer.
InMoment Software Engineer candidate reports ↗What topics does InMoment test in interviews?
InMoment interviews most often cover Stakeholder Management, Problem Solving, Stakeholder Communication, Technical Interviewing, and Whiteboard Exercises. The exact emphasis depends on the specific role you apply for.
InMoment 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.
- 01InMoment 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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