Senior C#/.NET Full-Stack Engineer — Medical Devices (Hybrid)

Connexion Systems and Engineering, Inc.; Wayland (MA); Hybrid; USD 160,000 - 180,000; Full time

Job summary

Connexion Systems & Engineering is seeking a Senior Full Stack Software Engineer with strong C#/.NET expertise to develop software for medical devices. You will work across the stack, from UI to backend services, integrating with device controllers in a regulated environment.

The role requires hands-on engineering across front-end and back-end, collaboration with UX/UI, and adherence to Secure SDLC practices. Hybrid work in Northborough, MA with on-site 3 days / remote 2 days per week.

Qualifications

• 5+ years of professional full-stack development experience.
• Strong expertise in C#/.NET development.
• Experience building modern web apps with HTML/CSS/JavaScript/TypeScript.
• Knowledge of MVC/MVVM and DI patterns.
• Experience with RESTful APIs and backend services.

Responsibilities

• Design, develop, and maintain responsive web applications, backend services, and APIs using C#/.NET, HTML, CSS, JS/TS.
• Develop front-end apps with modern frameworks; Blazor is a plus.
• Build APIs and services for communication with device controllers and medical devices.
• Collaborate with UX/UI to translate wireframes into high-quality apps.
• Optimize for performance, scalability, reliability, and maintainability.
• Troubleshoot and resolve issues across front-end, back-end, and services.
• Apply OOP principles and design patterns (MVC, MVVM, DI).
• Mentor junior engineers and participate in architectural discussions.
• Work in Agile/Scrum with Git and modern workflows.
• Support regulated medical devices with IEC 62304 compliance.

Skills

C#/.NET

Front-end development

RESTful APIs

Git

Agile/Scrum

Debugging

Education

Bachelor's degree in Computer Science or related field

Tools

Blazor

Azure/AWS/Google Cloud

Job description

Connexion Systems & Engineering is seeking a Senior Full Stack Software Engineer with strong C#/.NET expertise to develop software for medical devices. You will work across the stack, from UI to backend services, integrating with device controllers in a regulated environment.

The role requires hands-on engineering across front-end and back-end, collaboration with UX/UI, and adherence to Secure SDLC practices. Hybrid work in Northborough, MA with on-site 3 days / remote 2 days per week.