Company: Jack & Jill
Location: London
Job Description:
Job Title
Software Engineer (Frontend)
Salary
£175k–£200k + Equity
Company Description
Well-funded data infrastructure startup
Job Description
As a senior frontend‑leaning full‑stack engineer, you will own the entire user experience for a mission‑critical data orchestration platform. You will build complex DAG visualizations and cost observability tools using React and TypeScript, ensuring data teams can trust and monitor their AI workflows through a high‑performance, power‑user interface.
Location
London, UK
Why this role is remarkable
- Ship to production multiple times daily within a high‑velocity, 10‑person engineering team.
- Backed by top‑tier VCs and prominent industry angels from major data tech leaders.
- Significant equity stake in a pre‑seed company shaping the future of AI‑native data workflows.
What You Will Do
- Design and implement complex frontend features including DAG visualizations and lineage graphs.
- Partner directly with customers to prototype, iterate, and ship features without design bottlenecks.
- Contribute to the Python/FastAPI backend and AWS serverless infrastructure to support full‑stack delivery.
The ideal candidate
- At least 5+ years of experience building and scaling production‑grade web applications.
- Deep mastery of React and TypeScript with a strong eye for UI/UX craft and performance.
- Comfortable working as a generalist in a fast‑paced environment with a customer‑centric mindset.
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Posted: May 22nd, 2026