Why pre-screen interface developers before the portfolio review
Screenshots hide everything that matters after launch. Whether the layout survives a longer translation, whether a keyboard user can reach the menu, whether the stylesheet is a set of overrides nobody dares touch. Developers worth hiring build for those cases from the start rather than fixing them in a bug queue. A short screen asks what happens to their layout when the text gets longer.
What actually matters when screening User Interface Developer candidates
- 01
Technical proficiency
Check depth in semantic HTML, modern CSS (grid, container queries, cascade layers) and a framework like React or Vue: ask about state handling, hooks, and component APIs they built.
- 02
Systems and trade-offs
Probe how they weigh bundle size, hydration cost and browser support: ask about Core Web Vitals numbers, code splitting decisions, and when they rejected a UI library.
- 03
Evidence and rigour
Test verification habits: Lighthouse and axe audits, WCAG 2.2 AA fixes, keyboard and screen reader passes, visual regression snapshots, and cross-browser checks on real devices.
- 04
Collaboration and communication
Assess handoff with designers and backend: Figma spec interrogation, pushing back on unbuildable states, agreeing API shapes, and documenting components for other developers.
Pre-screening questions to ask User Interface Developer candidates
12 questions grouped by what they test. Ask the same set in every screen and score answers on a consistent scale, or send them as an async video screen and compare answers side by side.
Interfaces they built
3 questions01Can you talk about an interface project you recently worked on?
Listen forA shipped interface with their own contribution stated, and the constraints they were building against.
Projects described visually only, or contribution to the build not distinguished from the design.
02What kinds of applications or sites have you built with markup and stylesheets?
Listen forSemantic markup used deliberately, with layout built using modern techniques rather than fought into place.
Layouts built from generic containers throughout, or positioning used to force elements into place.
03What is your process for building an interface from scratch?
Listen forStructure and states considered before styling, with edge cases such as empty and error states planned.
Building straight from a static design, or error and empty states left until someone reports them.
Maintainable code
4 questions04How do you use scripting in interface work, and where do you avoid it?
Listen forNative behaviour preferred where it exists, with scripting used only where it genuinely adds something.
Scripted replacements for elements the browser already handles, or interactions that break without scripting.
05Do you have experience with interface frameworks or component libraries?
Listen forLibraries used with an understanding of what they generate, and customisation done without fighting the library.
Framework defaults overridden extensively, or no knowledge of the markup a component produces.
06Do you have experience with version control systems?
Listen forVersion control used as normal practice, with review and branching rather than files copied around.
Changes made directly on a live site, or no version history for interface code.
07Have you written or maintained interface guidelines or a style guide?
Listen forShared components and tokens documented so other developers build consistently without asking.
Guidelines written and never used, or every screen styled independently from scratch.
Accessible and responsive
3 questions08How do you ensure your interfaces are accessible to all users?
Listen forSemantics, keyboard access and focus handled as they build, with testing using an actual screen reader.
Accessibility treated as an audit at the end, or attributes added without testing whether they help.
09Do you have experience with cross-browser compatibility and responsive layouts?
Listen forTesting on real devices including older ones, with layout behaviour checked at awkward intermediate widths.
Testing done only by resizing a desktop browser, or older devices assumed to be someone else's problem.
10Do you have experience testing and debugging interface issues?
Listen forBrowser tooling used to diagnose layout and performance problems rather than changing values until it looks right.
Problems fixed by adding overrides, or no use of developer tooling to find the actual cause.
Feedback handled
2 questions11How do you handle feedback and criticism about your work?
Listen forFeedback taken without defensiveness, with a case where a review changed their approach for the better.
Design decisions defended regardless, or feedback described as interference from non-designers.
12What is your approach to incorporating user feedback into interface work?
Listen forReal usage evidence used to change an interface, with a specific change that came from watching people.
Decisions made on internal opinion, or no contact with anyone who actually uses the product.
How to score responses
Score every candidate on the same four criteria immediately after the screen. At this stage you are shortlisting for panel interviews, not making the final call.
Technical proficiency
35%5Explains component composition, CSS specificity and re-render behaviour precisely, and names build tooling such as Vite, Tailwind or Storybook they configured.
Systems and trade-offs
25%5Cites measured LCP or CLS improvements, justifies framework and styling trade-offs, and knows where a design system token layer belongs.
Evidence and rigour
25%5Describes specific accessibility defects found and remediated, plus test coverage using Playwright, Jest or Chromatic rather than manual clicking alone.
Collaboration and communication
15%5Gives concrete examples of resolving design ambiguity, contributing to shared component docs, and reviewing peers' front-end pull requests constructively.
Screenshots hide whether a keyboard reaches the menu or the layout survives longer text. A one-way video screen asks about both.
Try it on HirevireScreening FAQ
Process basics
How long should a pre-screening round for this role take?
Fifteen minutes across eight to ten questions, answered async, alongside a portfolio. Enough to establish what they built, test accessibility and browser habits, and check code practice.
Should I ask for links to live work?
Yes, and ask which parts were theirs. A finished interface tells you nothing about whether they built the components or styled a template that already existed.
Evaluating answers
What is the strongest signal when screening this role?
Accessibility handled as they build. Developers who take it seriously mention keyboard access and semantics without prompting. Anyone who treats it as a later audit will hand you a remediation backlog.
How do I judge their code quality?
Ask how they structure styles across a large interface. Real answers describe components and shared tokens. Anyone whose approach is overriding earlier rules will produce a stylesheet nobody can change.
Go deeper on this role
Sanat has been hiring since 2012 and watching the recruitment industry change up close ever since, and turned that screening process into Hirevire's video screening platform. LinkedIn
