Fullstack Developer - Backend Focus

Fluxion
📍 Helsinki, Uusimaa, Finland 💼 Full-time 🕒 Posted March 02, 2026

Job Description

Build the modeling engine that powers everything.

As a Fullstack Developer with a backend bias, you’ll focus on Fluxion’s core systems: the graph-based modelling engine, APIs, and infrastructure that make complex business modelling possible — and fast.

You’ll still work across the stack, but your main impact is in correctness, performance, and scalable architecture.

What you’ll do

  • Design and build core backend systems for modelling, simulation, and scenario planning
  • Develop APIs and data models that support rich frontend and AI workflows
  • Integrate AI capabilities into core product logic
  • Make architecture decisions balancing speed, reliability, and enterprise requirements
  • Work closely with frontend, design, and AI to ship end-to-end features

About You

  • Strong backend experience with solid understanding of fullstack systems
  • Comfortable with complex data models, p...

Ready to Apply?

Submit your application today and join our talented team at Fluxion.

Submit Application

Job Details

  • Location Helsinki, Uusimaa
  • Job Type Full-time
  • Category Software Development
  • Posted Date March 02, 2026
  • Application Deadline April 11, 2026