Senior Software Developer

Responsibilities

• Design, develop, test and document software for existing and new products
• Develop, maintain, and optimize backend services, with a focus on ASP.NET web applications
• Design and develop backend of our product, including Dotnet based RESTful API, SQL Server database
• Design, build, version, and optimize RESTful APIs with a focus on clear contracts, performance, security, and backwards compatibility
• Integrate with and consume third-party APIs reliably (auth, rate limits, retries, error handling)
• Use an agentic coding IDE (Cursor or similar) as part of your daily workflow to ship faster, while reviewing and verifying agent-generated code rather than accepting it blindly
• Collaborate with frontend web and mobile developers to design and deliver cohesive, high-quality features
• Collaborate with a team to design, develop and ship new features
• Work with DevOps to patch and release the product
• Work with designers and developers to provide feedback on design
• Review code and handle merge requests from other developers
• Identify and correct bottlenecks and fix bugs
• Help maintain code quality, organization, and automatization
• Work closely with the team to provide estimation and progress for the project
• Lead and coach Junior/Intermediate developers
• Actively identify and improve software development best practices and processes that make sense for the Development team
• Participate in a shared team responsibility to monitor and respond to critical issues, including system instabilities or feature regressions, ensuring rapid resolution and maintaining service reliability

Requirements

• Bachelor's Degree in Computer Science or a related field
• Typically, 5+ years of .NET experience and/or other object-oriented programming languages
• Experience with Microsoft Visual Studio
• Familiar with C#, WebAPIs, MVC, ASP.NET
• Strong RESTful API experience: designing, building, versioning, and optimizing APIs for performance and reliability
• Habitual use of an agentic coding IDE (Cursor or similar) with sound judgment for reviewing and verifying AI-generated code
• In-depth understanding of JavaScript programming and familiar with ES6
• Work effectively in a cloud-based environment; experience with AWS is a strong plus
• Familiar with object-oriented design patterns
• Familiar with RESTful APIs
• Experience with MS SQL Server and T-SQL language
• Understanding of SQL best practices and methodologies and experience investigating and solving SQL performance issues
• Proficient understanding of code versioning tools such as Git and the associated best practices
• Familiarity with Agile methodologies and experience with leading a scrum team
• AND IT'S GREAT TO HAVE
• Experience with the NoSQL database will be a plus
• Experience integrating high-traffic or third-party APIs
• Exposure to multi-tenant SaaS products
• General familiarity with a modern TypeScript / cloud-native SaaS stack is a plus, but not required
• On the lookout for a Senior Backend Developer to join the Trainer experience development team with Trainerize powered by ABC Fitness Solutions (www.trainerize.com).

Benefits

Additional Information

Join ABC Fitness and become part of a culture that's as ambitious as it is authentic. Let's transform the future of fitness-together! Our Values Best Life We believe great work begins with great people. That's why our culture is built on respect, trust, and belonging. We create an inclusive environment where every team member can bring their authentic self to work-because diverse perspectives drive innovation and meaningful impact. Growth Mindset We are doers, thinkers, and dreamers. At ABC Fitness, your growth is our investment. Through continuous learning, mentorship, and professional development opportunities, we empower you to reach new heights-personally and professionally. One Team From day one, you'll be part of a team that collaborates, celebrates, and cares. We move fast, support one another, and have fun along the way. Because when you thrive, we all thrive.

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