Senior Software Engineer – TeamUp

DaySmart supercharges experience-based businesses with innovative, industry-specific software services that power customer and revenue growth. With thousands of partners worldwide and dozens of industry awards, we provide best-inclass solutions to accelerate their business. TeamUp, a DaySmart product, is the most recommended management software for in-person and online classes at fitness studios, boxes, and gyms worldwide.

Position

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As a Senior Software Engineer at TeamUp, you will play a critical role in evolving our platform to meet the needs of a rapidly growing customer base. You will be a key contributor to the design, development, and maintenance of our core API services, application logic, and data models, as well as the Vue single-page applications our customers use every day — ensuring a secure, reliable, and performant experience end to end. You will leverage your deep understanding of Python and frameworks like Django and FastAPI to modernize our application and drive technical excellence within the team. We are an AI-first engineering organization. We expect our engineers to work fluently with AI coding assistants and agentic development tools as a normal part of the daily workflow — using them to plan, generate, review, and test code — and to apply the same engineering judgment to AI output that they would to their own. You will also help us build AI-powered capabilities into the product itself. This is an opportunity to make a direct impact on the success of thousands of fitness businesses worldwide, working closely with product teams and even directly with customers to understand and address their needs.

Responsibilities

• Design, develop, and maintain core API services and backend systems using Python, Django, and FastAPI.
• Contribute to the modernization of our application, transitioning from a legacy Django MVC architecture to an APIfirst approach.
• Optimize application performance and scalability to handle increasi