Company description

Finteli is an early-stage, pre-seed startup building B2B licensed software for financial practices. We help firms run structured, AI-assisted work on real client files with qualified accountants staying in control of outputs before anything is finalised.

Role description

This is not a narrow ticket factory role. You will join as an early engineer and take on real ownership from day one, with room to expand and develop as the company grows.

Expect to work across the full stack: product experience, APIs, data modelling, third-party integrations, and the operational basics (testing, CI, deployment, security-minded defaults). You will shape how we build, not only what we ship next week.

Required skills & experience

Strong TypeScript skills in production (3+ years), including typing, modules, and async patterns
React experience building non-trivial SPAs (hooks, state, forms, API-driven UI)
Node.js backend experience (Express or similar): routing, middleware, REST, structured errors
LLM / AI SDK usage (Anthropic, OpenAI, etc.) - structured outputs, cost and latency awareness
AI agent development - assisting in the creation of tailored AI agents
SQL / relational databases - comfortable reading and writing migrations, queries, and basic modelling
Git workflow in a team (PRs, code review, CI)
API integration experience (REST, auth headers, webhooks, env-based configuration)
Testing discipline - unit tests for logic you own; manual QA for user flows
Communication skills - you can explain trade-offs to non-engineers in a product-led startup
Right to work in the UK

Nice to haves

Postgres (indexes, constraints, row-level security concepts)
Supabase or similar BaaS (Auth-adjacent patterns, Storage, client libraries)
Clerk (or Auth0 / WorkOS) - organisations, roles, JWT / session flows
Document processing - PDF / Excel parsing, chunking, citation-style UX
Docker and deploying Node services (Railway, Fly.io, AWS, Render, etc.)
Vite build tooling and production front-end performance
Zod or similar runtime validation

What we offer

£70,000 – £75,000+ salary
25 days holiday allowance + 8 days for bank holidays
Favourable sick pay
Fully remote - we are a fully remote company
Flexible working
Enhanced pension contributions
Regular salary reviews
Performance bonuses
Training allowance
Potential equity (depending on growth and performance)

Apply by email using the Apply button above.