Senior Full-Stack Engineer for Mission-Critical Systems

NestAI; Helsinki; On-site; EUR 90,000 - 120,000; Full time

Job summary

NestAI in Helsinki is seeking a Senior Full Stack FDE to deliver and integrate autonomous systems for critical partners. You will build, adapt, and scale web apps, dashboards, and backend services across cloud and edge environments, prioritising security and reliability.

You’ll work across teams to translate operational needs into scalable features, travel up to 10% within Europe, and shape the roadmap for mission-critical software used in defence contexts.

Qualifications

• 5+ years of experience as a Full Stack Software Engineer, shipping complex web apps.
• Proficient in React, TypeScript, and server-side ecosystems (Node.js, Python, or Go).
• Experience with RESTful APIs, WebSockets, and database management (SQL/NoSQL).
• Familiar with Docker, Kubernetes, and CI/CD pipelines across cloud or on-prem.
• Able to adapt to changing environments and communicate with partners.
• Willingness to travel up to 10% within Europe.
• Nice-to-have: client-facing delivery or GIS libraries (Mapbox, Cesium), defence/aerospace.

Responsibilities

• Take technical ownership of client-facing web apps, dashboards, and backend services.
• Design and deploy robust APIs and backend services connecting NestOS with external systems.
• Build responsive, low-latency decision-support UIs with React/TypeScript.
• Leverage AI-assisted tools to accelerate development while maintaining security.
• Collaborate with customer teams and R&D to translate requirements into features.

Skills

React

TypeScript

Full stack

Tools

Node.js

Python

Go

Docker

Kubernetes

CI/CD

Job description

NestAI in Helsinki is seeking a Senior Full Stack FDE to deliver and integrate autonomous systems for critical partners. You will build, adapt, and scale web apps, dashboards, and backend services across cloud and edge environments, prioritising security and reliability.

You’ll work across teams to translate operational needs into scalable features, travel up to 10% within Europe, and shape the roadmap for mission-critical software used in defence contexts.