C# | Senior Software Developer

Job Description

Are you a solution-oriented developer with a passion for writing robust, maintainable code? At Coherent in Järfälla, you'll be part of the team building software that drives state-of-the-art optoelectronic research and high-volume production.

About Coherent

Coherent Corp. is a global leader in photonics and optoelectronics, operating across 73 sites in 18 countries.

At our Järfälla facility, we design and manufacture advanced fiber-optic communication chips used in everything from short-range data centers to long-haul telecom networks. These high-performance solutions are central to cloud services, 5G expansion, and the AI ecosystem.

With more than 330 engineers, technicians, and operators, our goal is clear: to lead through innovation and quality.

The Role

You Will Join a Small, Highly Skilled Team That Develops And Maintains The Software Systems Critical To Our Production Flow. Typical Work Includes

• Developing in-house applications such as our MES, chip-test infrastructure and service-maintenance tools
• Designing databases and systems, plus implementation, testing and maintenance
• Building CI/CD pipelines and driving automation across the factory
• Collaborating daily with colleagues in R&D, process engineering and operations to design new or improve existing solutions.
  
  

Tech stack

• C#, .NET / .NET Core (primary)
• WPF and/or Blazor (highly valued)
• SQL Server (design & advanced querying)
• ORM frameworks: Entity Framework, Dapper
• RavenDB or other document databases (nice to have)
• Azure DevOps & CI/CD pipelines
  
  

What you bring

• MSc/BSc in Computer Science, Engineering Physics or similar
• 5+ years of hands-on C# development
• Solid software-design and debugging skills
• Proficiency in English; Swedish is a plus
  
  

Voices from the Team

“It’s a great feeling to come into work every day and collaborate with my team of incredibly skilled, inventive, and ambitious developers. Watching the systems we build genuinely make the whole organization better is immensely rewarding.”

Tomas Jonsson – Manager Software Systems Engineering

“When I started working here, one of the first feeling I got was that I found my way home. Awesome colleagues, interesting and challenging work.”

Mikael Gustavsson – Senior Software Developer

Why Coherent?

At Coherent, you’ll work at the forefront of technology in a supportive and collaborative environment. Our site in Järfälla combines global innovation with local expertise and a strong sense of community.

What We Offer

• Cutting-edge technology and impactful work
• A diverse, international team
• Opportunities for both technical and leadership development
• A culture built on our ICARE values: Integrity, Collaboration, Accountability, Respect, and Enthusiasm
  
  

Culture Commitment

We work hard to ensure adherence to the company’s values (ICARE) in all aspects of your position at Coherent:

• Integrity – Create an Environment of Trust
• Collaboration – Innovate Through the Sharing of Ideas
• Accountability – Own the Process and the Outcome
• Respect – Recognize the Value in Everyone
• Enthusiasm – Find a Sense of Purpose in Work
  
  

Practical Information

Start: As agreed

Location: Järfälla – On Site

Scope: Full-time

Ready to build the next generation of opto-electronic manufacturing tools?

Submit your CV and a brief cover letter through our recruitment system.

Please note that reference and background checks will be conducted as part of the process.

About Us

Coherent is a global leader in lasers, engineered materials and networking components. We are a vertically integrated manufacturing company that develops innovative products for diversified applications in the industrial, optical communications, military, life sciences, semiconductor equipment, and consumer markets. Coherent provides a comprehensive career development platform within an environment that challenges employees to perform at their best, while rewarding excellence and hard-work through a competitive compensation program. It's an exciting opportunity to work for a company that offers stability, longevity and growth. Come Join Us!

Note to recruiters and employment agencies: We will not pay for unsolicited resumes from recruiters and employment agencies unless we have a signed agreement and have required assistance, in writing, for a specific opening.

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