F
Farther
Senior Frontend Engineer (Conversational & General User Interface)
Skills
DynamoDBReactTypescriptPythonTailwind CSSAWS LambdaVercelData AnalysisAIAWSGitHub
1 month ago
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Important information
Contract type:
Permanent
Location:
York, UK
Work mode:
Onsite
Published on:
18 September 2026
What they need
- Farther’s AI assistant answers advisor questions and drives the product on their behalf — navigating, opening workflows, and more
- This role continues and deepens the interaction between the assistant and our traditional UI platform. Next, it composes the interface itself
- You will contribute to both the framework that makes that possible and the assistant itself
- You are not designing screens, you are designing the system that decides what a screen can be, and the guardrails for the moment it is handed something nobody anticipated
- Deliver the assistant experience, prototype → production — the surface advisors reach for, and the thing every other item on this list exists to make possible
- Build the framework underneath it, so any Farther surface can declare what the agent can do and what it can see in a few lines
- Design the renderer that turns a model’s output into a real, validated, submittable interface, extensible so a new kind of input is additive and never a refactor
- Negotiate and version the wire contract with the agent backend team, and hold both sides to it with tests
- Treat developer experience as a first-class deliverable — design the API, document it, and judge it by how many teams build on it without asking you for help
- Mentor the engineers coming up behind you and set the quality bar in review
- Technical Stack
React - TypeScript
- Python
TanStack Query - React-hook-form
- Zod
Styling — Tailwind and CSS
UI modules built and deployed independently, then assembled into one application
Testing Library - ESLint
- Prettier
- GitHub Actions CI
Benefits
- Opportunity to work with a talented team of professionals.
- Drive the success of a venture-backed, rapidly growing firm- Comfortable context-switching across multiple concurrent workstreams
- Fluent in an AI-assisted development loop — building with Claude Code, shipping through Git-based PRs and automated review
- Distributed systems fundamentals — timeouts, retries, idempotency, failure isolation
- Genuine product instincts — you care about the user experience, and raise ambiguity as a decision rather than absorbing it as a guess
- Composition over configuration; modular, scalable frontend patterns are how you think by default
- Strong knowledge-sharing / documentation habit
- 6+ years building production web applications, including time somewhere the frontend was the product
- Production experience with LLMs — agentic systems, tool calling, streaming responses, conversational interfaces — and a point of view on what an interface owes a user when the model is slow, wrong, or halfway through an answer
- Expert-level frontend engineering, where strict typing is how you already work
- End-to-end ownership and a track record of meeting deadlines
- Used or extended a framework for agent-to-UI communication, and can say precisely where it stopped being enough
- Built and versioned a component library other teams depended on, and know what a breaking change costs once they have all imported it
- AWS fluency — Lambda, API Gateway, DynamoDB, CloudWatch
- Turned LLMs on how your own team builds: codegen, large-scale migrations, spec-to-code pipelines
- Engineering platform or internal tooling — Vercel, an internal PaaS, or the developer platform at your last company
- Wealth management, financial services, or analytics products dense with numbers people act on — including the craft that keeps them fast: profiling, bundle size, render performance
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