Senior .NET/C# Developer

Senior .NET/C# Developer with Capital Markets Experience

Are you an experienced developer and are eager to challenge yourself and take the next step on your career? Crosskey is now looking for Senior Software Developer position to join our Capital Markets team in Helsinki. The position is permanent and full-time. Join our team of highly skilled experts who share a strong sense of team spirit. This role provides a great opportunity to develop your skills with modern technologies while contributing your own ideas to drive continuous development within the company. If interested, please read on, and apply promptly.

Job Description

You will be joining an agile and highly supportive product development team that maintains and evolves the OneFactor back-office system, part of our capital markets offering. Your tasks will primarily involve programming in a .NET environment, working on both the development of new features and maintenance of existing systems.

You will be involved in the entire software development lifecycle, based on your strengths and interests—from refining business requirements to design, coding, code reviews, deployment pipeline automation, test script development, troubleshooting, documentation, and implementation.

You will also actively participate in our agile development process, including daily stand-ups, sprint planning, retrospectives, and client meetings when relevant.

Your position will be based in our Helsinki Office.

Senior .NET/C# Developer (Capital Markets Focus)

Technical Skills & Experience

• 5+ years of hands-on experience in software development, with a strong focus on .NET/C# technologies.
• Proven expertise in Dynamics 365 CRM, particularly in plugin and workflow development is preferable,
• Experience with source control systems such as Git, including branch-based workflows (e.g., GitFlow).
• Ability to write clean, maintainable, testable, and efficient code, following SOLID principles and modern software engineering practices.
  
  

Domain Knowledge

• Solid understanding of the capital markets domain (e.g., asset management, fund trading, clearing & settlement) is strongly preferred.
• Prior experience in financial system integration or regulatory compliance domains (MiFID II, DORA, AML, etc.) is an advantage.
  
  

Development Methodology & Tools

• Deep familiarity with Agile development methodologies, such as Scrum or SAFe.
• Experience with CI/CD pipelines, automated testing, and modern DevOps tooling is beneficial.
  
  

Soft Skills & Collaboration

• Strong analytical and problem-solving skills; ability to independently troubleshoot complex issues across application layers.
• Excellent communication skills in English; ability to collaborate in distributed teams. Proficiency in Finnish or Swedish is considered a plus.
• A proactive and structured work style: you take initiative, communicate clearly, and thrive in team environments.
  
  

Personal Attributes

• You are organized, detail-oriented, and quality-driven.
• You enjoy continuous learning and are eager to improve both your technical and domain-specific expertise.
• Comfortable mentoring junior developers and contributing to technical design discussions.
  
  

We offer you a fun and challenging workplace in an innovative company where our employees are at the center. We have an open and flexible culture. Freedom with responsibility, collaboration, and feedback are some of our cornerstones. We love challenges and are driven by making our customers more successful.

For more information, please contact Product Area Manager Pekka Häkkinen at [email protected] or HR Manager Monika Sigmark at +358 40 717 8456.

Apply at https://www.crosskey.fi/career no later than July 31, 2025.