Staff Frontend Architect — React & React Native

Trading-21; Greater London; On-site; GBP 110,000 - 170,000; Full time

Job summary

Trading-21 is seeking a Staff Frontend Engineer to shape architecture and engineering direction across product teams, spanning web and mobile using React, React Native, and an Nx monorepo. You will work closely with cross-team stakeholders on shared libraries, platform capabilities, and developer tooling to raise quality at scale.

You will remain hands-on to prototype and investigate complex problems, mentor senior engineers, and drive decisions that improve clarity and reduce friction across

Qualifications

• Evidence of architectural or platform impact across multiple frontend teams.
• Deep ownership of complex production systems built with React or React Native and TypeScript.
• Strong judgement in application boundaries, shared libraries, state management, performance and migration design.
• A track record of improving developer effectiveness, reliability or product quality through durable mechanisms.
• Practical experience diagnosing performance and correctness problems across web or mobile systems.
• The ability to influence technical direction through evidence, clarity and trusted execution rather than title.
• Clear communication that helps teams act on complex technical decisions.
• Strong engineering and product judgement, including knowing when not to introduce a new abstraction.

Responsibilities

• Set direction for frontend architecture across React, React Native and the shared monorepo.
• Own cross-team problems in platform capabilities, shared libraries, design-system foundations, tooling and developer experience.
• Lead decisions on boundaries, abstractions, state and data flow, performance, testing and migration strategy.
• Diagnose systemic rendering, bundle, runtime and release-quality problems and create durable fixes.
• Remain hands-on where implementation, prototyping or technical investigation is the fastest way to create clarity.
• Partner with product, backend engineering and QA on risks and decisions that cross team boundaries.
• Mentor senior engineers, raise review quality and make sound frontend judgement easier to reproduce across teams.
• Balance standardisation with team autonomy, avoiding platform work that creates more friction than leverage.

Job description

Trading-21 is seeking a Staff Frontend Engineer to shape architecture and engineering direction across product teams, spanning web and mobile using React, React Native, and an Nx monorepo. You will work closely with cross-team stakeholders on shared libraries, platform capabilities, and developer tooling to raise quality at scale.

You will remain hands-on to prototype and investigate complex problems, mentor senior engineers, and drive decisions that improve clarity and reduce friction across