A Software Engineer at Farallon Capital Management plays a pivotal role in the development and maintenance of critical applications that support the firm’s investment strategies and client services. This position is integral to the company's mission of delivering high-quality financial solutions, as software engineers are responsible for creating efficient, reliable, and scalable applications that handle large volumes of data and complex algorithms. The impact of this role extends beyond code; software engineers at Farallon contribute to systems that facilitate real-time data analysis, automate trading processes, and enhance user experiences for both internal teams and external clients. Working in a collaborative environment, you will engage with various teams, including quantitative analysts and product managers, to solve challenging problems and innovate solutions that drive business success. Excelling in this role means not only demonstrating technical prowess but also embracing the strategic influence your work has on the company's objectives and goals.
Phone Screening
reportedCandidates begin with a brief phone screening with a recruiter.
What to demonstrate
- Candidates begin with a brief phone screening with a recruiter
- Depth in Legacy Application Maintenance
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
reportedCandidates undergo technical interviews that may include coding challenges and discussions with hiring managers.
What to demonstrate
- Candidates undergo technical interviews that may include coding challenges and discussions with hiring managers
- Depth in Legacy Application Maintenance
How to prepare
- Answer aloud and timed: Describe a time when you optimized a piece of code for performance.
- Answer aloud and timed: Write a function to find the longest substring without repeating characters.
PracHub editorial advice for the preparation topics above.
Understand the Company Culture
Familiarize yourself with Farallon Capital Management's values and mission. Aligning your answers with their focus on excellence and collaboration can enhance your candidacy.
Practice Coding Under Time Constraints
Given that coding interviews may be time-limited, practice solving problems within a set timeframe to simulate the interview environment.
Be Ready for Scenario-Based Questions
Expect questions that require you to think through real-world problems and articulate your approach clearly.
Show Enthusiasm for Learning
Highlight your willingness to learn new technologies and methodologies, indicating that you are adaptable and growth-oriented.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to find the longest substring without repeating characters.
Write a function to find the longest substring without repeating characters.
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 binary tree, implement a function to perform a level order traversal.
Given a binary tree, implement a function to perform a level order traversal.
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?
Solve a problem involving data transformation or parsing.
Solve a problem involving data transformation or parsing.
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?
Hold a per-tenant active cap against concurrent creates
A tenant on the standard plan may hold at most 50 resources with status='active'. The create handler runs SELECT count(*) FROM resource WHERE tenant_id = $1 AND status = 'active', compares to 50, then inserts. Two creates arrive 3 ms apart on different instances and the tenant lands at 51. Name the anomaly, say whether PostgreSQL 16 READ COMMITTED or REPEATABLE READ prevents it and why, then give an implementation that holds the cap at READ COMMITTED with the exact statements. Finally, say what changes when the cap is 'at most one running export per tenant' on job_run.
Approach
- Name it: write skew. The two transactions read an overlapping set and write disjoint rows, so there is no row-level conflict for the engine to detect and each commit is individually legal.
- Rule out the levels precisely. READ COMMITTED takes a fresh snapshot per statement and takes no lock on the counted rows, so both see 49. PostgreSQL's REPEATABLE READ is snapshot isolation: it removes non-repeatable reads and phantoms within the snapshot but still admits write skew, because the anomaly is not a re-read of a changed row, it is a read of a set that a concurrent transaction invalidates. Only SERIALIZABLE closes it, by tracking the read dependency and aborting one transaction with SQLSTATE 40001 — a guarantee that exists only if the application re-runs the whole transaction from the read.
- Convert the set predicate into a single-row conflict: keep tenant.active_resource_count and run UPDATE tenant SET active_resource_count = active_resource_count + 1 WHERE tenant_id = $1 AND active_resource_count < 50 in the same transaction as the INSERT. Zero affected rows is the cap, returned as 409. The row lock serialises the decision at any isolation level, and contention is bounded to one tenant's row — which is also the fair-scheduling unit, unlike a global counter that would convoy every tenant behind one row.
- State the cost you just took on: a counter is a second source of truth that can drift, so every path that changes status must adjust it inside the same transaction, and a periodic reconciliation has to exist, with resource_revision as the authority for what the count should have been.
Follow-up
- A resource moves from archived back to active. Which statements change, and what breaks if the counter update and the status change land in different transactions?
- The cap becomes plan-dependent and a plan can change mid-month. Where does the number 50 live, and who reads it?
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 differences between REST and SOAP APIs.
Explain the differences between REST and SOAP APIs.
Approach
- Say who the caller is and what they do when the call fails halfway.
- Define the identity of a request so a retry cannot double-apply it.
- Separate accepted, pending, failed and confirmed; they are different facts.
- Design the error taxonomy before the success shape; callers branch on it.
Follow-up
- What happens if the caller retries after a timeout?
- How does a client discover it is on an old version of this contract?
How do you ensure your code is scalable and maintainable?
How do you ensure your code is scalable and maintainable?
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?
Design a system that can handle real-time stock price updates for a trading application.
Design a system that can handle real-time stock price updates for a trading 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?
How would you architect a microservices-based application for a financial platform?
How would you architect a microservices-based application for a financial platform?
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 different database technologies for a large-scale application.
Discuss the trade-offs between different database technologies for 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 gather requirements for a new feature from stakeholders.
Describe how you would gather requirements for a new feature from stakeholders.
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 metrics would you use to measure the success of a software application?
What metrics would you use to measure the success of a software 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?
How would you approach debugging a complex issue in a production application?
How would you approach debugging a complex issue in a production application?
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 Farallon Capital Management candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Farallon Capital Management loop
- Write out the reported sequence: Phone Screening, Technical 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 2 reported rounds, with the weakest marked.
02Work Legacy Application Maintenance
- Spend the session on Legacy Application Maintenance, which Farallon Capital Management candidates report being tested on.
- Write one worked example in Legacy Application Maintenance and time yourself on it.
Deliverable: One timed worked example in Legacy Application Maintenance.
03Work Windows Forms (WinForms)
- Spend the session on Windows Forms (WinForms), which Farallon Capital Management candidates report being tested on.
- Write one worked example in Windows Forms (WinForms) and time yourself on it.
Deliverable: One timed worked example in Windows Forms (WinForms).
04Work Stock Chart Visualization
- Spend the session on Stock Chart Visualization, which Farallon Capital Management candidates report being tested on.
- Write one worked example in Stock Chart Visualization and time yourself on it.
Deliverable: One timed worked example in Stock Chart Visualization.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: Explain the differences between REST and SOAP APIs.
- Answer aloud, timed: How do you ensure your code is scalable and maintainable?
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 find the longest substring without repeating characters.
- Answer aloud, timed: Given a binary tree, implement a function to perform a level order traversal.
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 overcame obstacles.
- Answer aloud, timed: How do you prioritize tasks when working on multiple projects?
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 optimized a piece of code for performance.
Describe a time when you optimized a piece of code 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?
Describe a challenging project you worked on and how you overcame obstacles.
Describe a challenging project you worked on and how you overcame 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 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?
Explain how you handle conflicts within a team setting.
Explain how you handle conflicts within a team setting.
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 optimized a piece of code for performance.
- 02
Describe a challenging project you worked on and how you overcame obstacles.
- 03
How do you prioritize tasks when working on multiple projects?
- 04
Explain how you handle conflicts within a team setting.
How difficult is the interview process?
The interview process at Farallon Capital Management is known to be rigorous, typically requiring a solid technical foundation and problem-solving skills. Candidates usually spend a few weeks preparing to ensure they are equipped to handle the complexities of the questions.
Farallon Capital Management Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates demonstrate strong technical abilities, clear communication skills, and a good cultural fit with the team's values. They are proactive in seeking solutions and effectively collaborate with others.
Farallon Capital Management Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
The timeline can vary, but candidates often progress from the initial screening to the final interview within a few weeks. Feedback is provided after each stage, although it may not always be detailed.
Farallon Capital Management Software Engineer candidate reports ↗Is remote work an option?
While Farallon Capital Management has embraced flexible work arrangements, the specific policies may depend on team needs and project requirements. Candidates should inquire about these expectations during the interview.
Farallon Capital Management Software Engineer candidate reports ↗What topics does Farallon Capital Management test in interviews?
Farallon Capital Management interviews most often cover Stakeholder Management, Data Analysis (General), Problem Solving, Technical Take-Home Assessment, and Legacy Application Maintenance. The exact emphasis depends on the specific role you apply for.
Farallon Capital Management 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.
- 01Farallon Capital Management 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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