Senior Full-Stack Engineer: C#, .NET, AI & Device APIs

Candela Medical; Marlborough (MA); On-site; USD 144,000 - 176,000; Full time

Job summary

Candela Corporation, a leading aesthetic device company based in Marlborough, MA, seeks a Senior Full Stack Software Engineer to advance web and mobile applications using C#/.NET and modern front-end tech, including Blazor. You will design APIs, integrate with device controllers, and drive secure, scalable solutions across the stack.

Ideal candidates have 5+ years in full-stack development, strong OO design, and hands-on experience with Azure/AWS/GCP, CI/CD pipelines, and regulated medical

Qualifications

• Bachelor's degree in Computer Science, Software Engineering or a related field, or equivalent experience.
• 5+ years of experience in development, full-stack with a focus on front-end and service development.
• Web and mobile application development with modern front-end technologies and frameworks (ideally Blazor).
• Experience in C#/.NET and HTML/CSS/JS or TypeScript.
• Web service and API development including service-to-device communication and API design.
• Strong understanding of OOP and patterns (MVC, MVVM, DI).
• Git and Agile methodologies; Scrum environment experience.
• Knowledge of IEC 62304 with design control and traceability docs.
• Agentic AI development practices incl. retrieval, tool use, guardrails, evaluation in regulated products.
• Strong problem-solving, proactive, and teamwork oriented.
• Cloud platforms (Azure, AWS, or Google Cloud), containers, and CI/CD pipelines.
• Cybersecurity principles and Secure SDLC (OWASP ASVS, threat modeling, SBOM).
• Embedded or device integration exposure (C/C++, RTOS, device protocols).
• Hardware-in-the-loop testing exposure.

Responsibilities

• Design and develop responsive, user-friendly applications and services using modern front-end and server-side technologies.
• Collaborate with UX/UI designers to translate designs into accessible code.
• Implement APIs and services for device controllers and connected medical devices.
• Optimize applications for speed, scalability and reliability.
• Troubleshoot and debug full-stack applications.
• Write clean, well-documented code and promote coding standards.
• Lead code reviews and mentor engineers.
• Ensure UI/UX designs are technically feasible.
• Apply secure-by-design practices including threat modeling and vulnerability remediation.
• Integrate automated tests into CI/CD pipelines and support regulated medical device software validation.
• Evaluate and integrate agentic AI capabilities with tool calling and retrieval-augmented generation.
• Provide design documentation and traceability artifacts.
• Stay updated with web, application, and AI development trends.

Skills

Full-stack development

C#/.NET

Blazor

API design

CI/CD

Cloud platforms

Security by design

Agile/Scrum

Mentoring

TypeScript

Education

Bachelor's degree in CS/SE

Tools

Blazor

Git

CI/CD

Azure

Docker

TypeScript

Job description

Candela Corporation, a leading aesthetic device company based in Marlborough, MA, seeks a Senior Full Stack Software Engineer to advance web and mobile applications using C#/.NET and modern front-end tech, including Blazor. You will design APIs, integrate with device controllers, and drive secure, scalable solutions across the stack.

Ideal candidates have 5+ years in full-stack development, strong OO design, and hands-on experience with Azure/AWS/GCP, CI/CD pipelines, and regulated medical