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Description
Hybrid requirements: This role has flexible working patterns.
Haystack is working with a direct employer on this opportunity.
Senior Full Stack Engineer (Frontend-focused)
Location: London (Hybrid – 3 days/week in office)
Type: Full-time
We’re hiring an exceptional Senior Software Engineer to help shape the future of our client’s platform.
The client’s brief:
You’ll play a key role in building intuitive, scalable, and high-performing features across our product. Whether your strength is in crafting elegant UI experiences or architecting robust backend systems, we’re looking for engineers who thrive in cross-functional teams and love owning features end-to-end.
What You’ll Do
Deliver impactful features across the stack, with a focus aligned to your expertise (frontend or backend).
Own systems from architecture and implementation to deployment and ongoing improvement.
Collaborate closely with design, product, and customer teams to translate ideas into polished user experiences.
Contribute to the evolution of our technical direction, engineering practices, and product strategy.
Participate in the full development lifecycle: planning, coding, reviewing, launching, and iterating.
What We’re Looking For
5+ years’ experience building and shipping full stack applications.
Deep experience with React and TypeScript, strong UI/UX sensibilities, and a portfolio that showcases your frontend work.
Strong experience building scalable APIs and backend systems, ideally using Python (or a willingness to learn it).
Solid understanding of cloud infrastructure (AWS, GCP, or Azure).
Comfortable working in fast-paced, collaborative environments.
Bonus: Experience in a high-growth startup, familiarity with testing tools (e.g., Playwright, Storybook), and serverless architecture.
Tech Stack
Frontend: React, TypeScript, Playwright, Storybook
Backend: Python, FastAPI, Postgres, TypeScript
Cloud: AWS (Lambda, DynamoDB, EKS, etc.)
DevOps & Tooling: GitHub Actions, Terraform, Docker
Role tech stack
React
TypeScript
Python
AWS
