Full Stack Engineer (Onsite)

Attis; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Equity

Coding credits

On-site London team

Job summary

Attis, a London-based venture-backed startup, is seeking a Senior Full Stack Engineer to own the user-facing application and agentic tool layer from day one. The role focuses on real-time AI-powered coordination for critical infrastructure and logistics, with a strong emphasis on end-to-end product ownership.

You will integrate TypeScript frontend with Python backend services, craft the tool layer atop core operational models, and enable workflow creation from chat interfaces.

Qualifications

• 3+ years of professional experience shipping production full-stack software.
• Exceptional proficiency in TypeScript (frontend) and Python (backend).
• Proven track record of deploying LLM-powered products beyond the demo stage.

Responsibilities

• Own the product end-to-end, spanning the TypeScript interface and Python backend services.
• Architect and scale the tool layer over core operational models.
• Build seamless workflow creation and execution directly from chat interfaces.
• Implement structured data access, frontline communication channels, and exception handling.
• Develop evaluation harnesses to ensure agent accuracy and prevent regressions.

Skills

TypeScript

Python

LLMs

Agentic AI

AWS

Postgres

Job description

Stack: TypeScript, Python, Agentic AI, LLMs, AWS, Postgres

Mission: Real-time AI workforce coordination for critical infrastructure and logistics.

Tired of building generic CRUD apps that live behind screens and never touch the physical world?

A top-tier venture-backed London startup is replacing legacy spreadsheets, radios, and manual chaos with real-time algorithmic control and agentic AI. They need a Senior Full Stack Engineer to own the user-facing application and agentic tool layer from day one.

Zero red tape. Real-world physical impact. Meaningful early-stage upside.

Why Build Here:

• End-to-End Ownership: Take complete control of the web application and agentic tool layer with zero bureaucracy.
• Direct Operational Exposure: Work side-by-side with frontline coordinators on-site to see your code solve real-world problems.
• High-Caliber In-Person Team: Build alongside exceptional engineers in a tight-knit London environment.
• Founding-Tier Package: Generous equity and dedicated coding credits to build without constraints.

The Tech & Work:

• Own the product end-to-end, spanning the TypeScript interface and Python backend services
• Architect and scale the tool layer over core operational models
• Build seamless workflow creation and execution directly from chat interfaces
• Implement structured data access, frontline communication channels, and exception handling
• Develop evaluation harnesses to ensure agent accuracy and prevent regressions

Hard Filters:

• 3+ years of professional experience shipping production full-stack software
• Exceptional proficiency in TypeScript (frontend) and Python (backend)
• Proven track record of deploying LLM-powered products past the demo stage (tool use & structured outputs)
• Based in London (on-site model) with valid UK work authorization

No terminology in this advert is intended to discriminate on the grounds of age, sex, race, religion or belief, disability, pregnancy and maternity, marriage and civil partnership, sexual orientation, gender, and/or gender reassignment, and we confirm that we are happy to accept applications from anyone for this role.

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