Founding Product Engineer (Frontend)
About the role
Confident AI is building the infrastructure that makes AI trustworthy. The Founding Product Engineer will own the frontend product end-to-end, from user research and design to shipped code, including API routes and server logic. This role is a founding position with high autonomy and direct impact on product quality and user experience.
Responsibilities
- Own user-facing features from product decision to design to shipped code. You make the design calls — there are no Figma files waiting for you.
- Build data-dense, fast, polished interfaces for traces, evaluation results, and testing workflows — the screens our users live in every day.
- Talk to users, understand their workflows, and turn what you learn into product decisions.
- Work across the stack. Most of your time is in the frontend, but you'll write the API routes, queries, and server logic your features need without waiting on anyone.
- Architect the frontend to last — the components, state management, and patterns you establish need to hold up as the product and team grow around them.
- Set the standard for product quality and user experience that every engineer we hire after you builds to.
Qualifications
- 3+ years building production web applications, ideally at a fast-moving product company or startup.
- Deep proficiency with React, Next.js, TypeScript, and CSS. You don’t reach for a UI library because you can write the styles yourself — you reach for one when it’s the right call.
- A genuine eye for design. You notice when spacing is off by 2px, opinions on motion and hierarchy, and can take a feature from idea to polished UI without a designer.
- You understand frontend at scale — rendering performance, state management, data fetching, and architecture that doesn’t collapse as the product grows.
- Enough backend fluency to move fast — databases, APIs, caching, auth. You won’t be scaling them, but you build against them confidently.
- Fluent with AI coding tools like Claude Code and Cursor as part of your daily workflow.
- You think in user experiences, not components.
- High-agency and comfortable with ambiguity. Seed-stage environment.
Skills
About Confident AI
Open-Source Unit Testing for LLM Applications
Confident AI allows companies of all sizes to benchmark, safeguard, and improve LLM applications, with best-in-class metrics and guardrails powered by DeepEval. Built by the creators of DeepEval (4.3k stars, >400k monthly downloads), Confident AI is able to offer battle-tested, open-source evaluation algorithms while providing the infrastructure needed for teams to stay confident their LLM systems.
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