Senior Fullstack Engineer, AI Platform & Scale

SoSafe; United Kingdom; Remote; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Work/Life balance: Flexible hours

33 vacation days

Open Up & discounts

Virtual events & meet-ups

Tech equipment & referral bonuses

Job summary

SoSafe is seeking a skilled full‑stack engineer to help build the core capabilities of our AI Platform. You will work in a small, autonomous team delivering runtimes, model routing, tool registries and shared services that power AI agents used across SoSafe products.

You’ll design and implement production-grade platform services using Node.js, TypeScript, NestJS and React, and you’ll work with LLMs, LangChain, LangGraph and agent orchestration to solve governance, observability and scalability

Qualifications

• Experience building modern full-stack applications with Node.js, TypeScript and React.
• Hands-on experience building AI-powered applications or platforms using LLMs and AI agents.
• Ability to design reusable APIs and tooling for engineers.

Responsibilities

• Build core capabilities behind SoSafe's AI Platform including runtimes and model routing.
• Design and build production-grade platform services and developer tooling with Node.js/TS/NestJS/React.
• Develop reusable AI infrastructure enabling teams to deploy AI agents securely at scale.
• Work hands-on with LLMs, LangChain/LangGraph, agent orchestration, governance and observability.

Skills

Node.js

TypeScript

React

Full-stack

LLMs

Tools

NestJS

LangChain

LangGraph

MCP

Job description

SoSafe is seeking a skilled full‑stack engineer to help build the core capabilities of our AI Platform. You will work in a small, autonomous team delivering runtimes, model routing, tool registries and shared services that power AI agents used across SoSafe products.

You’ll design and implement production-grade platform services using Node.js, TypeScript, NestJS and React, and you’ll work with LLMs, LangChain, LangGraph and agent orchestration to solve governance, observability and scalability