Do you want to help shape a modern, scalable HR platform used by organisations worldwide?

At HR-ON we’re looking for a Senior Fullstack Developer to help build, maintain, and scale a mature SaaS platform using C#, .NET, Typescript and Azure. As the product is already live, a significant part of your work will focus on maintaining and improving existing systems, ensuring user experience, reliability and performance.

• Design and build core services in C#, .NET and Typescript
• Model and optimise data in Azure, ensuring performance and reliability at scale.
• Develop and maintain REST endpoints that power our product features and partner integrations.
• Evolve the platform architecture for resilience, observability, and easy maintenance.
• Automate CI/CD pipelines with GitLab and champion clean-code practices through code reviews and pair-programming.
• Collaborate with product, frontend, and DevOps peers to deliver end-to-end features that delight our users.

You’re an experienced engineer who:

• Has built C#, .NET and REST services and integrated external systems, even if integrations aren’t your sole focus.
• Uses GitLab (or similar) for version control, CI, and automated tests.
• Thinks in terms of scalable, maintainable architecture and values knowledge-sharing with teammates.

Bonus Points

• Experience in managing teams and projects is an advantage.
• AWS infrastructure-as-code (CDK, Terraform, CloudFormation).
• Bash/Zsh scripting on *nix systems.
• A fondness for type-safe, declarative coding styles (e.g. fp-inspired TypeScript).

We don’t expect you to tick every box—curiosity and a growth mindset matter most.

• High autonomy & influence over tech choices and ways of working.
• Value-based self-management—trust, transparency, and flexibility come first.
• Central Odense office with remote options; we still value regular in-person collaboration.
• 50 passionate colleagues across Denmark, Germany, Norway, and Japan, united by a flat structure and meaningful work.

We assess applications continuously - apply online today, ideally with code samples or project links.

Questions?

• Ali E. Cevik, CEO: +45 71 99 07 65 | ali.cevik@hr-on.com

We look forward to hearing from you!