Full Stack Engineer
🔥Senior Full Stack Engineer (Backend Focus)🔥
Rapidly Expanding AI Startup
📍 Remote (UK-based)
💰 Competitive Salary + Strong Equity with potential early realisation (12–18 months)
We’re working with an early Series A, rapidly scaling AI startup building a next-generation platform that helps enterprises turn AI ambition into production-grade, measurable business outcomes.
The product enables teams to design, deploy, and operationalise AI agents in real-world environments with strong early traction already across enterprise customers.
This is a high-ownership engineering role, with a clear emphasis on backend systems, architecture, and scalable AI infrastructure, while still contributing across the full stack when needed.
🚀 Why this role stands out
✔️ Early Series A stage, strong funding, fast growth trajectory, product already in market.
✔️ Real enterprise traction, working systems already in production with global clients.
✔️ Backend ownership, core services, architecture, and system design responsibility.
✔️ AI-native product, building deeply with LLMs, agents, and streaming systems.
✔️ Small, elite engineering team, high autonomy, low ego, high trust environment.
✔️ High-impact equity, meaningful upside tied directly to company scale.
🛠️ What you’ll be doing
• Own end-to-end product features, with a strong focus on backend systems and architecture.
• Design and build scalable Python services (FastAPI or similar) powering AI workflows.
• Build and operate AI-native systems – async processing, streaming pipelines, state-heavy workflows.
• Collaborate with Product, Design, and AI teams to ship production-grade features.
• Contribute to frontend development (TypeScript / React) where needed for full feature ownership.
• Drive engineering quality across testing, performance, observability, and reliability.
• Help shape technical direction and mentor other engineers in a high-trust environment.
⚙️ Tech environment
Backend (core focus):
• Python (FastAPI or similar).
• Async/concurrent systems, API design, distributed workflows.
Frontend:
TypeScript, React, Next.js.
Data:
• Postgres (schema design, performance tuning, migrations).
Auth & Security:
• OAuth / OIDC, JWT, RBAC / ABAC.
AI / Platform:
• LLM integrations and tool/function calling.
• Streaming architectures to frontend.
• Vector databases.
• Agent-based systems and state management.
✅ What we’re looking for
• Strong experience as a backend-leaning full stack engineer in production environments.
• Deep expertise in Python backend systems (FastAPI or similar).
• Strong TypeScript + React capability (able to ship end-to-end features).
• Experience building SaaS platforms with authentication and permissions.
• Exposure to AI-native development or LLM-powered systems.
• Strong product thinking and ability to work in ambiguous environments.
• Comfortable taking ownership of core backend architecture and services.
🌱 Why join
This is a chance to join an early Series A company at a pivotal scaling point, where engineering decisions directly shape product direction, architecture, and long-term success.
You’ll be joining a small, highly technical team building infrastructure for the next wave of enterprise AI adoption.