Technical writer, engineering interview questions

As asked

Your public quickstart works on your laptop but fails for many new users with authentication and dependency errors. How do you diagnose and fix it?

Sample answer outline

Start by reproducing in a clean environment, ideally a fresh container or CI job with no cached credentials. Check every assumed prerequisite: package manager version, environment variables, API key scopes, region defaults, network calls, and copy-paste commands. The fix should include clearer errors, preflight checks, pinned or bounded dependency versions, and an automated smoke test that runs the published quickstart. Strong DevRel candidates explain how they collect failure reports without shaming users and how the findings become product improvements. A common miss is only editing the prose while leaving the fragile path intact.

Expect these follow-ups

• What would your quickstart CI test actually run?
• How do you decide between adding explanation and simplifying the product flow?
• What telemetry would you add to know where developers drop off?

As asked

You are asked to document a new API, but the only source material is the implementation, tests, and a few Slack threads. How do you produce accurate docs?

Sample answer outline

A strong writer triangulates from code, tests, and engineers rather than rewriting Slack notes. Start by identifying the audience, main tasks, authentication path, request and response shapes, error cases, limits, and versioning behaviour. Run the examples against a real or local environment so the docs are executable, not aspirational. The candidate should push for missing product decisions where the code is ambiguous. Interviewers look for accuracy discipline: docs review, changelog links, owned examples, and a maintenance path when the API changes.

Expect these follow-ups

• What do you do when the implementation and the intended behaviour disagree?
• How do you test code samples in docs?
• Which parts belong in reference docs versus a tutorial?

As asked

You join a team mid-sprint and the lead engineer drops you into a Swagger file and a Postman collection for a payment API that ships in three weeks. Walk me through exactly what you do in the first two days.

Sample answer outline

Strong answers mention reading the OpenAPI spec top to bottom first, running every endpoint in Postman to verify the spec matches actual behavior, flagging discrepancies immediately, and setting up a lightweight doc skeleton before writing prose. Candidates should mention identifying the primary user persona (developer integrating the API) and scoping the happy path first before edge cases.

Expect these follow-ups

• What do you do when the Postman collection and the spec disagree on a field name?
• How do you prioritize which endpoints to document first?

As asked

If I hand you an OpenAPI 3.1 file and ask you to assess it before you generate any docs from it, what are the five or six things you look at first?

Sample answer outline

Strong answers cover: meaningful summary and description fields (not just auto-generated names), proper schema names rather than inline anonymous objects, example values that reflect realistic payloads, correct use of $ref to avoid duplication, complete error response definitions, and tags that map to a logical grouping the reader would recognize. Candidates should flag that generated docs are only as good as the spec.

Expect these follow-ups

• How do you push back on engineers who say description fields are optional?

As asked

What is your process for writing changelog entries, and what is the difference between a changelog entry that helps a developer upgrade confidently versus one that just lists commits?

Sample answer outline

Strong answers describe structuring entries by impact (breaking changes first, then new features, then fixes), linking directly to the changed reference page and migration guide, and writing from the developer's perspective: what they need to do, not what the team did internally. Candidates should mention following Keep a Changelog conventions or a documented in-house format, and avoiding commit-message dumps.

Expect these follow-ups

• How do you get engineers to submit useful release notes rather than one-line commit messages?

As asked

I often see developer docs that try to be both at once and end up being neither. How do you draw the line between reference content and tutorial content, and what are the failure modes of each?

Sample answer outline

Strong answers draw the Diátaxis-style distinction: reference is information-oriented and complete (every parameter, every return type), tutorials are learning-oriented and opinionated (this is the one way we will do it today). Reference fails when it omits why or when to use something. Tutorials fail when they branch on every option instead of committing to a single path. Candidates may mention how-to guides as a third category distinct from tutorials.

Expect these follow-ups

• How do you handle a tutorial that needs to show two different authentication methods?