As a Software Engineer at Coding it Forward, you are at the forefront of developing innovative solutions that directly impact community engagement and social good. Your role is critical in building software that not only enhances user experience but also contributes to the mission of creating positive change through technology. You'll engage with diverse teams to design, implement, and refine products that serve a wide array of users, from civic organizations to individual advocates. The Software Engineer position is pivotal in shaping the functionality and performance of products that embody the values of Coding it Forward. You will work on complex problems that require a deep understanding of technology and its application in various social contexts. This role is not just about coding; it's about understanding the end-user and their needs, ensuring that your contributions align with the broader objectives of the organization. Expect to collaborate with cross-functional teams, tackling unique challenges that arise from real-world applications of technology.
Application Submission
reportedCandidates submit their application articulating their reasons for wanting to join Coding it Forward.
What to demonstrate
- Candidates submit their application articulating their reasons for wanting to join Coding it Forward
- Depth in System Design
How to prepare
- Answer aloud and timed: What programming languages are you most comfortable with, and why?
- Answer aloud and timed: Describe a challenging technical problem you faced and how you resolved it.
Technical Round
reportedCandidates undergo a technical round focused on system design, collaboration, and written assessments.
What to demonstrate
- Candidates undergo a technical round focused on system design, collaboration, and written assessments
- Depth in System Design
How to prepare
- Answer aloud and timed: How do you ensure code quality and maintainability in your projects?
- Answer aloud and timed: Explain the difference between REST and GraphQL APIs.
Office Matching Round
reportedCandidates rank their preferences for potential office locations based on interests and experience.
What to demonstrate
- Candidates rank their preferences for potential office locations based on interests and experience
- Depth in System Design
How to prepare
- Answer aloud and timed: How would you design a real-time chat application?
- Answer aloud and timed: What considerations would you take into account for a high-traffic web application?
Office Interview
reportedFinal interview tailored to the candidate's office match, assessing fit with the team.
What to demonstrate
- Final interview tailored to the candidate's office match, assessing fit with the team
- Depth in System Design
How to prepare
- Answer aloud and timed: Describe how you would approach designing a database schema for an e-commerce platform.
- Answer aloud and timed: Describe a time when you disagreed with a team member. How did you handle it?
PracHub editorial advice for the preparation topics above.
Understand the mission
Familiarize yourself with Coding it Forward's mission and values to effectively convey your alignment during the interview.
Practice coding
Regularly engage in coding challenges and practical exercises to sharpen your technical skills and prepare for potential coding interviews.
Prepare behavioral examples
Reflect on past experiences that highlight your collaboration, leadership, and problem-solving abilities to share during behavioral interviews.
Stay engaged
Demonstrate genuine interest and enthusiasm for the role and the organization's mission throughout the interview process.
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?
Explain your thought process while writing a sorting algorithm.
Explain your thought process while writing a sorting 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?
How do you optimize a search function in a large dataset?
How do you optimize a search function in a large dataset?
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 approach designing a database schema for an e-commerce platform.
Describe how you would approach designing a database schema for an e-commerce platform.
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?
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?
What programming languages are you most comfortable with, and why?
What programming languages are you most comfortable with, and why?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
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 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?
Explain the difference between REST and GraphQL APIs.
Explain the difference between REST and GraphQL 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 would you design a real-time chat application?
How would you design a real-time chat 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?
What considerations would you take into account for a high-traffic web application?
What considerations would you take into account for a high-traffic 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?
Given a specific user story, how would you gather requirements from stakeholders?
Given a specific user story, how would you gather requirements 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?
Describe a project where you had to balance technical debt against new feature development.
Describe a project where you had to balance technical debt against new feature 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 production issue with a live application?
How would you approach debugging a production issue with a live 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 Coding it Forward candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Coding it Forward loop
- Write out the reported sequence: Application Submission, Technical Round, Office Matching Round, Office 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 4 reported rounds, with the weakest marked.
02Work System Design
- Spend the session on System Design, which Coding it Forward candidates report being tested on.
- Write one worked example in System Design and time yourself on it.
Deliverable: One timed worked example in System Design.
03Work Software Engineering (General)
- Spend the session on Software Engineering (General), which Coding it Forward 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).
04Work Critical Thinking
- Spend the session on Critical Thinking, which Coding it Forward candidates report being tested on.
- Write one worked example in Critical Thinking and time yourself on it.
Deliverable: One timed worked example in Critical Thinking.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What programming languages are you most comfortable with, and why?
- 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 real-time chat application?
- Answer aloud, timed: What considerations would you take into account for a high-traffic web application?
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 disagreed with a team member. How did you handle it?
- Answer aloud, timed: What do you think makes a successful software engineer in a collaborative environment?
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 disagreed with a team member. How did you handle it?
Describe a time when you disagreed with a 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 do you think makes a successful software engineer in a collaborative environment?
What do you think makes a successful software engineer in a collaborative environment?
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?
- 01
Describe a time when you disagreed with a team member. How did you handle it?
- 02
What do you think makes a successful software engineer in a collaborative environment?
- 03
How do you prioritize tasks when working on multiple projects?
What is the interview difficulty level, and how much preparation time is typical?
The interview process at Coding it Forward can range from average to challenging, depending on the specific team and role. Candidates typically spend several weeks preparing, focusing on both technical skills and behavioral questions.
Coding it Forward Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates demonstrate a strong technical foundation, effective communication skills, and a genuine alignment with Coding it Forward's mission. They also show an eagerness to learn and adapt throughout the interview process.
Coding it Forward Software Engineer candidate reports ↗What is the culture like at Coding it Forward?
Coding it Forward fosters a collaborative and inclusive culture where innovation and social impact are prioritized. Employees are encouraged to share ideas and contribute to projects that align with their passions.
Coding it Forward Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
The timeline can vary, but candidates can generally expect a response within a few weeks after their interviews. The entire process may take 4-6 weeks depending on scheduling and availability.
Coding it Forward Software Engineer candidate reports ↗Are there remote work options available?
Yes, Coding it Forward offers flexible working arrangements, including remote and hybrid options. However, the specifics may vary based on the role and team.
Coding it Forward Software Engineer candidate reports ↗What topics does Coding it Forward test in interviews?
Coding it Forward interviews most often cover System Design, Asynchronous video interview platforms, Software Engineering (General), Time-boxed responses, and Critical Thinking. The exact emphasis depends on the specific role you apply for.
Coding it Forward 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.
- 01Coding it Forward 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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