> Markdown version of [/jobs/ext/2022240-senior-frontend-engineer](https://www.wearedevelopers.com/jobs/ext/2022240-senior-frontend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Frontend Engineer - **Company:** Reactive Markets - **Location:** UK (Remote available) - **Experience:** Expert - **Salary:** £62,181.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Code Review, Software Debugging, Linux, Distributed Systems, Python (Programming Language), Network Protocols, TypeScript, WebSocket, ReactJS, Git, Real Time Data, Front End Software Development, Api Design, Restful APIs, Es2015 - **Published:** August 11, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5834873547 ## About the Role * Strong full-stack engineering ability with deep TypeScript / JavaScript (ES6+) (5+ years) * Solid experience with React and reactive state management (RX, MobX, or similar) * Real working ability in Rust - it's part of our stack and not optional at this level. If your Rust is still developing, a strong track record of picking up new languages to depth quickly is essential * Strong grasp of distributed systems, API design, and real-time data (REST, WebSockets, network protocols such as TCP/UDP and binary protocols) * Comfortable reasoning about architecture and making defensible technical trade-offs * Python for scripting, automation, and tooling is a bonus * Git and Linux fundamentals * Experience in financial services or trading technology is a plus but not essential How you work: * You ship. You're delivery-focused - you iterate, you improve, you get things into production * You run with things. Give you an ambiguous, complex problem and you drive it to done without being managed through it. Senior here means trusted, not just experienced * You have range. You're not just strong in the familiar parts of the stack - you pick up the unfamiliar and hold your own on the hardest work * You own it. When you build something, you take responsibility for its behaviour in production. You respond to incidents (15-minute acknowledgement SLA during working hours), investigate issues, and close the loop * You raise the bar. You review peers' work thoughtfully, mentor the engineers around you through the craft, and set a standard others calibrate to * You write things down. Documentation is not an afterthought - it's how we scale knowledge across a distributed team. If it's not written down, it doesn't exist * You communicate. We're a distributed team across multiple time zones. Clear, proactive communication - especially when things go wrong - is essential * You embrace AI tooling. We use AI tools (Claude, Gemini) to amplify our engineering capability - from code review and debugging to incident investigation and documentation. You don't need to be an expert, but you should be curious and willing to learn ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025)