The role of a Software Engineer at Littler Mendelson is pivotal in enhancing the firm's technological capabilities and supporting its mission as a leader in labor and employment law. As a Software Engineer, you will be responsible for developing and maintaining software applications that streamline the firm’s operations, improve client interactions, and facilitate legal processes. Your work directly impacts the productivity of attorneys and support staff, ensuring that they have the tools necessary to provide exceptional legal services. This position offers a unique opportunity to engage with complex legal systems and contribute to innovative solutions that address the unique challenges faced by a law firm. You will work closely with cross-functional teams, including legal experts and product managers, to create software that is not only functional but also user-friendly and compliant with legal standards. The role's strategic importance is underscored by the ongoing digital transformation within the legal sector, making it both a challenging and rewarding career path.
HR Call
reportedInitial call to discuss your background and motivation for applying.
What to demonstrate
- Initial call to discuss your background and motivation for applying
- Depth in Software Engineering
How to prepare
- Answer aloud and timed: What programming languages are you proficient in, and which do you prefer to use for software development?
- Answer aloud and timed: Describe a challenging technical problem you faced and how you resolved it.
Technical Interviews
reportedInterviews involving coding challenges, problem-solving exercises, and discussions about past projects.
What to demonstrate
- Interviews involving coding challenges, problem-solving exercises, and discussions about past projects
- Depth in Software Engineering
How to prepare
- Answer aloud and timed: How do you ensure the quality and reliability of your code?
- Answer aloud and timed: Can you explain the principles of object-oriented programming?
On-site Interview
reportedOpportunity to meet with team members and experience the company’s environment firsthand.
What to demonstrate
- Opportunity to meet with team members and experience the company’s environment firsthand
- Depth in Software Engineering
How to prepare
- Answer aloud and timed: What development tools and methodologies do you utilize in your projects?
- Answer aloud and timed: How would you design a system to manage case files for a law firm?
PracHub editorial advice for the preparation topics above.
Research the Firm
Understanding Littler Mendelson’s mission and values is crucial. Familiarize yourself with their practices in labor law to effectively discuss how your role contributes to their objectives.
Prepare for Behavioral Questions
Be ready to share specific examples from your past experiences that showcase your problem-solving skills and teamwork abilities.
Highlight Relevant Projects
During your interviews, discuss specific projects that demonstrate your technical skills and your ability to deliver results in a legal or complex environment.
Practice Coding
If coding challenges are part of your interview, practice common algorithms and data structures. Use platforms like LeetCode or HackerRank to simulate interview conditions.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to sort a list of case files by date.
Write a function to sort a list of case files by date.
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 solving the "two-sum" problem?
How would you approach solving the "two-sum" 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?
Can you discuss a data structure you find particularly useful and why?
Can you discuss a data structure you find particularly useful and why?
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 the concept of recursion and provide an example.
Explain the concept of recursion and provide an example.
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 is the difference between breadth-first search and depth-first search?
What is the difference between breadth-first search and depth-first search?
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?
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?
Keep soft-deleted accounts from blocking re-registration
app_user holds user_id, tenant_id, email CITEXT, password_hash (NULL for SSO principals), email_verified_at, auth_version, status ('invited','active','suspended','deactivated'), created_at, updated_at, deleted_at. Two live accounts for one address inside a tenant must be impossible, but an address freed by a soft delete must be reusable, and the same tenant may delete and re-register it repeatedly. Write the uniqueness DDL for PostgreSQL 16, then the equivalent for MySQL 8 where partial indexes do not exist, and say what each permits once three deleted rows already hold that address.
Approach
- Start from what is actually unique: not (tenant_id, email), but (tenant_id, email) among live rows. PostgreSQL says that directly — CREATE UNIQUE INDEX app_user_live_email ON app_user (tenant_id, email) WHERE deleted_at IS NULL. A full constraint over the same two columns burns the address permanently the first time someone deletes an account.
- Keep case-insensitivity in the type or the index, never in the application: CITEXT as given, or UNIQUE (tenant_id, lower(email)) as an expression index where the extension is unavailable. A case-sensitive unique column is exactly how two accounts for one human appear.
- For MySQL 8 the predicate has to move inside the key: add a discriminator column that is a constant 0 while the row is live and is set to user_id on delete, with UNIQUE (tenant_id, email, deleted_marker). Live rows share the constant and still collide; deleted rows differ from each other and stop colliding.
- State the NULL variant and its dependency: leaving the marker NULL for deleted rows also works, because a unique index treats NULLs as distinct — true in MySQL, and true in PostgreSQL only under the default NULLS DISTINCT, which PostgreSQL 15 lets you reverse. Check the polarity against the three existing deleted rows: constant-on-live is what preserves the collision you want, and reversing it silently admits duplicate live accounts.
Follow-up
- A deleted account re-registers with the same address the next day. Do the old resource rows follow the new user_id, and how does the API keep the two principals apart?
- How do you honour an erasure request while resource_revision.actor_user_id still references this table?
What programming languages are you proficient in, and which do you prefer to use for software development?
What programming languages are you proficient in, and which do you prefer to use for software development?
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 challenging technical problem you faced and how you resolved it.
Describe a challenging technical problem 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?
How do you ensure the quality and reliability of your code?
How do you ensure the quality and reliability of your code?
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 principles of object-oriented programming?
Can you explain the principles of object-oriented 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 development tools and methodologies do you utilize in your projects?
What development tools and methodologies do you utilize 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 design a system to manage case files for a law firm?
How would you design a system to manage case files for a law firm?
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 considerations do you take into account when designing a software architecture?
What considerations do you take into account when designing a software 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?
Describe how you would optimize a database for performance.
Describe how you would optimize a database for performance.
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?
Explain the trade-offs between microservices and monolithic architecture.
Explain the trade-offs between microservices and monolithic 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?
How would you implement security measures in a legal software application?
How would you implement security measures in a legal software 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?
Given a scenario where a software feature is underperforming, how would you diagnose the issue?
Given a scenario where a software feature is underperforming, how would you 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?
Develop a solution for automating a manual process within a law firm.
Develop a solution for automating a manual process within a law firm.
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 analyze user feedback for a software product?
What steps would you take to analyze user feedback for a software product?
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 handle a situation where project requirements change midway through development?
How would you handle a situation where project requirements change midway through development?
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 complicated issue in production?
How would you approach debugging a complicated issue in production?
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 Littler Mendelson candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Littler Mendelson loop
- Write out the reported sequence: HR Call, Technical Interviews, On-site 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 Software Engineering
- Spend the session on Software Engineering, which Littler Mendelson candidates report being tested on.
- Write one worked example in Software Engineering and time yourself on it.
Deliverable: One timed worked example in Software Engineering.
03Work Interview Process (Technical Rounds)
- Spend the session on Interview Process (Technical Rounds), which Littler Mendelson candidates report being tested on.
- Write one worked example in Interview Process (Technical Rounds) and time yourself on it.
Deliverable: One timed worked example in Interview Process (Technical Rounds).
04Work Development Team Interview
- Spend the session on Development Team Interview, which Littler Mendelson candidates report being tested on.
- Write one worked example in Development Team Interview and time yourself on it.
Deliverable: One timed worked example in Development Team Interview.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What programming languages are you proficient in, and which do you prefer to use for software development?
- Answer aloud, timed: Describe a challenging technical problem you faced and how you resolved it.
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: System Design / Architecture
- Answer aloud, timed: How would you design a system to manage case files for a law firm?
- Answer aloud, timed: What considerations do you take into account when designing a software architecture?
Deliverable: Spoken answers to 2 reported System Design / Architecture question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a time when you had to collaborate with a difficult team member. How did you handle it?
- Answer aloud, timed: What motivates you to excel in your role as a Software Engineer?
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 a time when you had to collaborate with a difficult team member. How did you handle it?
Describe a time when you had to collaborate 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 motivates you to excel in your role as a Software Engineer?
What motivates you to excel in your role as a Software Engineer?
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 projects?
How do you prioritize tasks when working on multiple 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?
Can you give an example of how you have influenced a team decision?
Can you give an example of how you have influenced a team decision?
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 approach feedback and criticism of your work?
How do you approach 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?
- 01
Describe a time when you had to collaborate with a difficult team member. How did you handle it?
- 02
What motivates you to excel in your role as a Software Engineer?
- 03
How do you prioritize tasks when working on multiple projects?
- 04
Can you give an example of how you have influenced a team decision?
What is the typical interview difficulty for the Software Engineer position?
The interview process at Littler Mendelson is moderately challenging, with a focus on both technical skills and cultural fit. Candidates generally require several weeks of preparation to feel confident.
Littler Mendelson Software Engineer candidate reports ↗What differentiates successful candidates at Littler Mendelson?
Successful candidates demonstrate strong technical proficiency, problem-solving skills, and a commitment to collaboration. They also align with the firm’s values and show a genuine interest in contributing to the legal field.
Littler Mendelson Software Engineer candidate reports ↗Can you describe the culture and working style at Littler Mendelson?
The culture at Littler Mendelson emphasizes teamwork, innovation, and a commitment to excellence. Employees are encouraged to collaborate across departments and actively engage in continuous learning.
Littler Mendelson Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
Candidates can expect the interview process to take several weeks, with most stages occurring within a month. Communication is generally prompt, but it’s advisable to follow up if there are delays.
Littler Mendelson Software Engineer candidate reports ↗Are remote work options available for this role?
While some flexibility may exist, the position often requires in-office collaboration, especially for initial training and team-building activities.
Littler Mendelson Software Engineer candidate reports ↗What topics does Littler Mendelson test in interviews?
Littler Mendelson interviews most often cover Software Engineering, DevOps Engineering, Persona / Behavioral Fit, Marketing Analytics, and Scrum Framework. The exact emphasis depends on the specific role you apply for.
Littler Mendelson 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.
- 01Littler Mendelson 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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