Senior Frontend Engineer

Role summary: A product\-minded senior frontend engineer who thrives in fast\-growth environments, owns features (and their quality) end\-to\-end, and uses agentic development workflows to ship faster. Works closely with product and design, not just executing tickets.

Responsibilities: Work closely with the Product team to build out core applications for both internal and external users.

Evaluation criteria (in priority order):

1\. Fast\-growth / high\-performance startup or scaleup experience *(highest weight)*

• Has worked at a Series A/B (or comparable) startup through a period of rapid scaling, ideally not just a large, stable org.


• Comfortable with ambiguity, shifting priorities, and shipping under pressure without over\-engineering.


• Signals: early/founding engineer roles, "first N engineers," ownership of significant surface area, demonstrable velocity. Be wary of CVs showing only big\-company or agency/consultancy backgrounds.

2\. Strong agentic workflows / development optimisation

• Actively uses AI coding agents (Claude Code, Cursor, etc.) as a core part of how they work, not as an occasional aid.


• Thinks about optimising their own and the team's development workflow \- tooling, automation, spec\-driven development.


• Signals: mentions of agentic/AI\-native development, internal tooling, DX improvements, side projects built with agents, relevant OSS contributions (MCP, agent frameworks). Recency matters \- this should be current, not aspirational.

3\. Strong product engagement / design collaboration

• Engages with the "why," contributes to product decisions, and pushes back constructively rather than waiting for fully\-specced tickets.


• Collaborates directly with designers; comfortable with Figma handoff and translating design intent into polished UI.


• Signals: product\-led teams, mentions of shaping features, user\-facing ownership, design\-system or UX\-quality work.

4\. React experience

• Solid, current production React. Adjacent modern stack (TypeScript, Next.js) is a plus.


• Note: lowest\-weighted of the ranked criteria \- a strong agentic, product\-minded scaleup engineer with a slightly different framework background may still be worth considering.

Ownership of quality (baseline expectation):

• Used to owning their own testing and quality \- writes and maintains their own tests, doesn't rely on a separate QA function to catch issues.


• Signals: TDD/testing discipline, mentions of test coverage ownership, "you build it, you run it" cultures.

Disqualifiers / flags:

• Cannot commute to London.


• Purely backend or infrastructure focus with no frontend ownership.


• No evidence of any of the top three criteria.

Levels is an equal opportunity employer. We welcome applications from all qualified candidates regardless of background, and we're committed to building a diverse and inclusive team.

Compensation Range: £85K \- £95K

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