Senior Software Engineer

Be yourself at Protolabs

Studies have shown that women and people of color are less likely to apply to jobs unless they meet every single qualification. We are an equal opportunity employer, and we are committed to building a diverse team that feels they are valued in the workplace. So do you feel you do not meet every single requirement but still intrigued? We encourage you to still apply! You can help make our company even better. We do not discriminate based on race, color, national origin, sexual orientation, gender, age, mental or physical ability, or any way you represent yourself. We strongly believe diversity makes for more successful teams.

Why Protolabs?

We are the leaders in digital manufacturing. We hire doers, makers, and creative thinkers who tackle our roles with an entrepreneurial spirit. Our culture is centered around meaningful work that brings new and innovative products to market at unprecedented speeds. We are a diverse team that comes from all walks of life and take pride in our team who is smart, genuine, humble, and passionate about what we do. It’s our people who fuel our creativity and make our culture feel like home.

Join our team as a Senior Software Engineer Engineer!

This is a fixed hybrid role on-site Tuesday, Wednesday, Thursday in Nashua NH

What You'll Do

• Design, develop, and maintain software applications used across Protolabs’ digital manufacturing and commerce platforms
• Build and enhance features using .NET Core, C#, web services, and SQL Server
• Utilize AI tools for software development such as Cursor, Claude or Co-pilot
• Design, implement, debug, and deliver high quality software
• Participate in requirements gathering, system design discussions, design reviews, and code reviews
• Create and maintain unit tests and automated acceptance tests to ensure software quality and reliability
• Debug and resolve production issues across functional and technical areas
• Work from established system designs and specifications using standard development tools, procedures, and best practices
• Collaborate effectively with architects, other engineers, product partners, and cross functional teams
• Provide technical input and assistance to less experienced engineers when appropriate
• Communicate development progress, risks, and support needs to team members and management
• Follow software engineering best practices and contribute to system resilience, performance, and maintainability
• Stay current on relevant technologies, frameworks, and industry best practices
• Participate in 24x7 on‑call rotation in support of global software systems
• Perform other duties as assigned

What It Takes

Education and Experience:

• A degree in Computer Science, Software Engineering, or related field
• 5+ years of professional software development experience (or equivalent demonstrated capability)
• Proficient in C#, Visual Studio, MS‑SQL, HTML, JavaScript
• .NET development work experience
• Experience developing, maintaining, and supporting production software systems
• Experience with multiple .NET patterns and platform technologies like client/server, ASP .NET sites, web services, WCF endpoints, SOA, or MVC
• Experience using version control systems in a team environment

Knowledge, Skills, And Abilities

• Strong communication skills and work ethic
• Solid understanding of core software engineering concepts, design principles, and development practices
• Familiarity with Agile/Scrum development methodologies
• Demonstrated accountability, positive attitude, and ability to meet commitments
• Strong problem‑solving, analytical, and debugging skills
• Ability to work independently on assigned tasks while collaborating within a team
• Demonstrated history of staying current on best practices in technology

What's In It For You?

• We offer a competitive salary and annual bonus opportunity
• In addition, we offer amazing benefits including but not limited to:
  • Health Insurance: Traditional OR High Deductible plan
  • Flexible Spending Accounts
  • Health Savings Account (including employer contributions)
  • Dental and Vision
  • Basic and Supplemental Life Insurance
  • Short‑Term and Long‑Term Disability
• Paid caregiver leave
• You will receive at least 3 weeks of PTO + Holiday Pay + Wellness Hours + Volunteer Hours
• 401k with company match and immediate vest
• Employee Stock Purchase Program at a 15% discounted rate
• Matching grants through Protolabs foundation
• And More!

$107,400 - $161,000 a year

Proto Labs maintains ITAR‑compliant operations in all of our United States based facilities. Due to ITAR regulations, this role is only open to U.S. Citizens, lawful permanent residents (green card holders) or foreign nationals granted refugee or asylee status. Individuals with temporary visas (e.g. E, F‑1, H‑1, H‑2, L, B, J, TN or OPT) are not eligible for hire in this role. Proto Labs, Inc. is an Equal Opportunity Employer

Physical Demands

While performing the essential duties of this job, the employee is regularly required to sit; use a computer keyboard, monitor and mouse, telephone and printer; reach with hands, and arms, talk, see and hear. The employee is occasionally required to stand, walk, stoop or kneel and must occasionally lift and/or move up to 25 pounds.

Work Environment

Indoors (A/C); nonsmoking; the majority of this job function is performed in an office setting requiring normal safety precautions. However, there may be job duties that require the employee to spend time in the manufacturing areas exposed to machinery and noise; eye protection occasionally required. Occasionally works in outside weather conditions. Occasionally works near moving mechanical parts and in high, precarious places and is occasionally exposed to wet and/or humid conditions, fumes or airborne particles, toxic or caustic chemicals, risk of electrical shock and vibration. The noise level in the work environment is usually quiet to moderate.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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