Senior Back End Developer

BoomerangFX; Mississauga; On-site; CAD 110,000 - 140,000; Full time

Job summary

BoomerangFX, a dynamic and fast-growing healthcare tech company, seeks a Senior Back-End Developer to strengthen our global SaaS platform and engineering team.

You will design, build, and optimize server-side logic, APIs, and data integrations using .NET, Azure, and SQL Server, collaborating in agile sprints with cross-functional teams to deliver scalable solutions.

Qualifications

• 5+ years of hands-on back-end development experience.
• Strong proficiency in .NET (C#).
• Solid experience with Microsoft Azure services.
• Expertise in SQL Server and relational database design.
• Experience developing RESTful APIs and web services.
• Understanding of CI/CD pipelines and version control (Git).

Responsibilities

• Develop, test, and deploy scalable and secure back-end services using .NET (C#).
• Design and maintain APIs and database structures to support front-end features.
• Work with Azure cloud services (App Services, Functions, Blob Storage, etc.).
• Ensure high performance and responsiveness to requests from the front end.
• Collaborate with front-end developers, QA, and product managers in agile sprints.
• Maintain clean, scalable, and well-documented code.
• Troubleshoot and optimize application performance, security, and scalability.

Skills

Back-end development

.NET (C#)

Microsoft Azure

SQL Server

RESTful APIs

CI/CD pipelines

Git

Job description

BoomerangFX isn’t just a company— it’s a movement redefining how private pay healthcare practices operate. Recognized as one of North America’s Fastest Growing Tech Companies two years in a row by Deloitte’s Fast 500 program ranking 6th in Canada and 23rd in North America. We are a global leader in practice management software and digital marketing solutions. Our growth trajectory of over 8000% is matched by our ambition to disrupt and dominate the healthcare technology landscape.

With offices across the USA, Canada, UK, Sydney, and India, we’re building a truly global organization and expanding our presence in international markets. This is an exciting opportunity to join a high-growth company and play a meaningful role in shaping and supporting our continued international growth.

About the Role:

We are seeking a talented and experienced Senior Back-End Developer to join our growing team. The ideal candidate will have strong experience working with .NET, Microsoft Azure, and SQL/Sequence. You will be responsible for building, maintaining, and optimizing the server-side logic, APIs, and database integrations of our SaaS platform.

Key Responsibilities:

• Develop, test, and deploy scalable and secure back-end services using .NET (C#)
• Design and maintain APIs and database structures to support front-end features
• Work with Azure cloud services (App Services, Functions, Blob Storage, etc.)
• Ensure high performance and responsiveness to requests from the front end
• Collaborate with front-end developers, QA, and product managers in agile sprints
• Maintain clean, scalable, and well-documented code
• Troubleshoot and optimize application performance, security, and scalability

Required Qualifications:

• 5+ years of hands-on back-end development experience
• Strong proficiency in .NET (C#)
• Solid experience with Microsoft Azure services
• Expertise in SQL Server and familiarity with Sequence or relational database design
• Experience developing RESTful APIs and web services
• Understanding of CI/CD pipelines and version control (Git)` tags, replaces `` with ``, removes decorative emojis, and retains all protected content exactly as requested.