Senior .NET Full-Stack Developer

6 days ago

Tallinn, Harjumaa, Estonia Fusebox Full time €104,000 - €130,878 per year

About Fusebox

Fusebox
is an energy tech company building cutting-edge software solutions that unlock flexibility in electricity systems. Our platform helps commercial and industrial customers automatically shift their energy usage to support a greener and more balanced grid — and get paid for it. We're active across several European markets and scaling fast.

Our mission is to make energy flexibility simple, accessible, and valuable. We're a small but passionate team combining tech, energy market expertise, and customer-centric design to build the future of energy.

About the Role

We're looking for a
Senior
.NET Full-Stack Developer
to join our core development team. You'll play a vital role in shaping the architecture, building robust features, and setting the standard for code quality as we scale our product and engineering team.

In this position, you'll collaborate closely with product and operations, take ownership of key components, and help build out our internal development culture. If you're ready to make an impact in a purpose-driven company, we'd love to hear from you.

What You'll Do

  • Develop and deliver full-stack features using
    C#/.NET
    and
  • Design and evolve the system architecture and DevOps workflows
  • Conduct code reviews, improve test coverage, and maintain code quality
  • Mentor developers and shape team culture
  • Lead development on critical components of our energy flexibility platform

What We're Looking For

Must-haves:

  • 6+ years professional experience in
    C#/.NET
    backend development
  • Strong front-end skills with
    JavaScript
    preferred)
  • Solid experience with
    REST APIs
    and
    relational databases
  • Background in SaaS or product-based companies
  • Clean code practices, collaborative mindset, and technical leadership ability
  • Nice-to-haves:
  • Experience with
    Azure
    ,
    Docker
    ,
    CI/CD pipelines
    , or
    Kubernetes
  • Prior experience in energy tech or real-time data systems

Why Join Fusebox?

Impact from Day One
: What you build directly powers the company's growth and mission.

Ownership
: You'll shape the tech stack and development culture as we scale.

Collaboration
: Work closely with a committed, cross-functional team

Career Growth
: Grow into tech leadership, architecture, or mentoring roles as the team expands.

Meaningful Mission
: Be part of the transition toward a more sustainable and efficient energy system.

Ready to Apply?

Join us at
Fusebox
and help us build smarter energy systems for a sustainable future. Apply now and let's talk

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