Mid Software Engineer

At Medius, we believe finance should empower strategy, not stress. Founded in Sweden in 2001, we’ve grown from a local startup into a global leader in cloud-based spend management. Thousands of organizations trust our AI-powered solutions to simplify processes, eliminate manual work, and give finance teams clarity, confidence, and control. 

We’re more than a software company – we’re a global team of problem-solvers and innovators reinventing accounts payable. Our culture thrives on freedom, curiosity, and continuous improvement, giving you space to focus on what matters – and still have time to live your best life. 

If you want to make a real impact, see your ideas come to life, and shape the future of finance, Medius is the place for you. 

Job overview

We are looking for a highly skilled Software Engineer to join our Kraków-based team as we scale our next-generation, true cloud service. Supporting over 1,000 global clients, our main platform is built on a modern stack of Azure, .NET Core, React, and TypeScript. In this role you will do more than write code; you will influence the product’s future by designing scalable solutions and championing the integration of AI to revolutionize our development lifecycle. Success in this role means balancing high-velocity feature delivery with long-term architectural health.

What you'll do:

• Build and maintain scalable cloud services that can handle the load a global customer base puts on them.

• Apply Domain-Driven Design (DDD) principles in practice — modular, maintainable code, not just the vocabulary.

• Use AI tools (GitHub Copilot, LLM assistants, etc.) as a genuine part of your workflow — code generation, refactoring, documentation, test writing.

• Design and maintain RESTful APIs that integrate cleanly within a complex cloud environment.

• Work with Azure services and make sensible trade-offs between performance, cost, and security.

• Collaborate with engineers, product owners, and designers in an agile team — contribute to the work and to the culture.

• Write good tests, participate in code reviews, and hold a high bar for code quality.

• Keep an eye on emerging tooling and bring back what's actually useful.

Qualifications:

• 3+ years of professional software development experience, strong with C# and .NET.

• Hands-on frontend experience — React (or equivalent), TypeScript/JavaScript.

• Practical familiarity with DDD and CQRS patterns, not just theoretical knowledge.

• Experience deploying and operating services on Microsoft Azure.

• Some real experience using AI tools to speed up development — and genuine curiosity to go further.

• Solid with relational databases and RESTful API design.

• Strong testing habits and a track record of maintaining quality in production software.

• CS degree or equivalent experience.

• English at B2 or above — you can explain technical decisions clearly to non-technical stakeholders.

• You take ownership of your work and invest in your own growth and in the team's.

Why Medius: 

• Well-being perks: Multikafeteria program, private healthcare (LuxMed), life insurance 

• Fun & connection: Summer & Christmas parties, Game Board nights, spontaneous team events 

• Growth & impact: Be part of a team where your ideas matter, innovation thrives, and your work is visible globally