Senior Software Engineer .NET

Start: According to agreement

Duration: Long term. 12 months initially, good possibility for extension for the right candidate

Location: Remote, office in Stockholm

Are you a senior .NET engineer looking to work on a technically challenging, high-impact product used across the world? Do you want a role where you influence architecture, drive modernization, and build scalable systems, all within a fast-growing and profitable tech company? If so, this opportunity is for you!

Our client is a successful and rapidly scaling product company delivering a next-generation SaaS platform used by enterprises globally. The platform enables seamless management of complex workflows and high-volume operations, combining modern architecture, advanced data handling, and a strong focus on usability and performance. They are now looking to build a brand new generation and part of their product, so this is a unique opportunity to be a part of building something new from ground - but with a strong foundation in place. Take this opportunity to join a company that values technical excellence, long-term product development, and meaningful impact.

Who you are:

• You enjoy technical ownership and thrive in an environment where engineering decisions matter.
• You appreciate working in a product-first company where you can influence both architecture and long-term vision.
• You are curious, proactive, and motivated by solving meaningful technical problems at scale.
• You want to work in a modern, agile team that values simplicity, quality, and continuous learning.

This is a long term assignment, where the end goal is to be recruited by our client after the initial 12 months - as long as everybody is happy with the collaboration.

Job Requirements

What we are looking for:

• Several years of relevant experience within system development in .NET/C#
• Deep knowledge of .NET Core, C#, design and implementation of REST API:s and databases (such as SQL Server)
• Good understanding of CI/CD pipelines, architectural principles and coding standards
• Thrives in an environment where you analyze and modernize existing systems
• You are a team player that actively shares knowledge and contribute to the team
• You are fluent in English (and preferably in Swedish as well)

Nice-to-have experience:

• Experience with DDD (Domain-Driven Design) or Vertical Slice Architecture.
• Background in building or maintaining SaaS platforms or distributed systems.
• Familiarity with event-driven architectures, message queues, or asynchronous communication patterns.
• Frontend experience with Blazor (WASM) or similar component-based frameworks.
• Knowledge of PWA, offline-first functionality, or applications with complex client-side state handling.
• Experience participating in teams with structured code review processes (PR-based workflows).
• Exposure to AI/ML, data-intensive applications, or building models (nice, but not expected).

Application procedure

A Maandag® recruiter will assess your application as soon as possible to determine whether you are suitable for an open position.

About The Company

If you are a good match, we would like to receive a CV in WORD format with motivation why you fit this assignment, your availability and any scheduled holidays.

Why Maandag Nordic? With us, you’ll get the chance to really put your ideas into action. We offer a work environment where you can grow and learn through hands-on experience - trying things out, making mistakes, and improving.

For more than 35 years, Maandag® has been at the forefront of empowering people and organisations. We not only help professionals get jobs, but also connect them with a future that matches their values, desires and ambitions. Because when people are truly in the right place, they can develop themselves, fulfil their dreams and go to work with fresh energy every day. The energy and power released in the process is a catalyst for growth for companies. We started in the Netherlands, but now we also help professionals and organisations in Belgium, Poland, Dubai and Sweden. Our extensive knowledge of different markets, coupled with our wide network, enables us to make perfect matches quickly.