Senior Platform Engineer

At Medius, we believe finance should be about 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 remove complexity, 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 is built on freedom, curiosity, and continuous improvement, giving you space to focus on what matters and still have time to live your best life.

Join Medius and be part of a team where ideas matter, innovation thrives, and your impact is felt.

Learn more at www.medius.com

Job overview

The Capture team at Medius processes millions of invoices through a cloud‑native platform built on Azure. As a Senior Platform Engineer, you will play a key role in shaping the application platform that underpins the product. You will work directly in the product codebase, building frameworks, abstractions, and cross‑cutting capabilities that improve reliability, scalability, security, and developer experience. Success in this role means elevating the engineering effectiveness of the entire team and strengthening the platform foundations that enable Capture to deliver a world‑class product experience.

Responsibilities and Duties

• Identify, prioritize, and implement solutions for impactful cross‑cutting concerns such as reliability, scalability, security, developer experience, and customer experience.

• Strengthen shared platform components and libraries in a mature codebase, balancing pragmatic improvements with long-term architectural evolution in close collaboration with product engineers.

• Improve testing practices and quality assurance across the platform—whether through better test frameworks and data management, contract testing for service boundaries, or strategies that make legacy code more testable without requiring full rewrites.

• Modernize deployment practices and infrastructure as the platform migrates from Service Fabric to AKS, improving reliability and release velocity for a production system serving millions of invoices.

• Raise engineering quality through pair programming, thoughtful code reviews, and clear technical communication.

• Collaborate closely with engineers across the team to promote best practices, knowledge sharing, and consistent architectural patterns.

Qualifications

• Experience as a senior engineer working in cloud‑native Azure and .NET environments.

• Proven track record of improving engineering effectiveness in areas such as throughput, stability, observability, and developer experience.

• Strong proficiency in C#, .NET, and Azure services

• Ability to analyse systemic problems and design robust abstractions rather than localized fixes.

• Strong collaborative mindset, with experience in pair programming, mentoring, and driving technical alignment.

• Excellent communication skills and fluency in English for effective cross‑team collaboration.

Benefits

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

• Fun & connection: Summer & Xmas parties, Game Board nights, and spontaneous events