Senior Fullstack Engineer – AI Platform

Stack

Responsibilities

• ▹Build the core capabilities behind SoSafe's Agentic AI Platform: agent runtimes, model routing, tool registries and shared platform services
• ▹Design and build production-grade platform services and developer tooling using Node.js, TypeScript, NestJS and React
• ▹Develop reusable AI infrastructure that enables engineering teams to build, deploy and operate AI agents securely and at scale
• ▹Work hands-on with LLMs, LangChain/LangGraph and agent orchestration, solving platform challenges around governance, observability and scalability
• ▹Own features end-to-end, from architecture and implementation through deployment and continuous improvement
• ▹Shape the future of AI engineering by contributing ideas, improving developer experience and influencing platform architecture

Requirements

• ▹Strong experience building modern full-stack applications with Node.js, TypeScript and React
• ▹Hands-on experience building AI-powered applications or platforms using LLMs, AI agents, LangChain, LangGraph, MCP or similar technologies
• ▹A platform mindset: enjoying building reusable systems, APIs and tooling that help other engineers move faster
• ▹Confidence using AI coding tools daily while applying sound engineering judgment to architecture, code quality and technical decisions
• ▹The ability to thrive in ambiguity, take ownership and solve complex engineering problems in a fast-moving environment

Nice to have

• ▹Experience with developer platforms, distributed systems, infrastructure-as-code, cloud-native architectures or AI governance

Soft skills

What we offer

• ▹Flexible hours, 33 vacation days
• ▹Access to Open Up and corporate discounts
• ▹Virtual events, collaborative team activities, and local meet-ups
• ▹Tech equipment, referral bonuses, dog-friendly HQ

About the company

SoSafe aims to become the leading human risk management provider in Europe; its award-winning awareness platform drives behavioural change through cybersecurity and data protection training and simulations.