Full Stack Developer in Toronto

MLSE Sport Performance Lab is seeking a Full Stack Developer to join our team. This individual will play a key role in developing and maintaining team coaching applications across multiple projects. They will focus on frontend development (React), backend/API development (Python/AWS), and provide development support for mobile applications using React Native. This role reports to the Director, Software Engineering.

Sport Performance Lab is a research & development team focused on delivering wins for our professional teams. We are looking for individuals who are eager to learn and able to collaborate within a diverse team.

Position Type: 12-month independent contract

Responsibilities:

• Develop and maintain web application features using React, adhering to modern DevOps practices and security standards.
• Design, implement, and support APIs to integrate frontend and backend systems, leveraging Python and AWS services.
• Provide development support for iOS apps using React Native.
• Use AI-assisted development tools to accelerate delivery while maintaining code quality, security, and correctness standards.
• Assist with backend development tasks using Python, ensuring stability and performance.
• Collaborate with other teams, such as infrastructure and application engineering, to define metadata layers, technical strategies, and efficient integration across the existing landscape.
• Develop and implement testing solutions, including automation, to ensure application quality and reliability.
• Provide high-level sizing estimates and contribute to planning and scoping discussions to ensure alignment on technical solutions, project goals, and prioritization.
• Contribute to and maintain documentation of engineering best practices, tools, and frameworks.

Qualifications:

• Minimum 3-5 years of experience in full stack development.
• Hands-on experience with React for frontend development.
• Proficiency in Python for backend and API development.
• Familiarity with AWS services and their integration into backend systems.
• Familiarity with AI-assisted development tooling (e.g., Claude Code, GitHub Copilot, Cursor) and sound judgment about when to use it, including review of AI-generated code.
• Knowledge of React Native or a strong interest in learning mobile development is a plus.
• Advocate of security best practices and micro-service architecture.
• Proven ability to take a project from scoping requirements through to product launch.
• Strong understanding of software development lifecycle (SDLC) practices, including version control, code reviews, testing, and operations.
• Experience collaborating with backend developers to design and integrate APIs and web services into applications.
• Excellent problem-solving and analytical skills.
• Ability to work collaboratively in a team and effectively manage multiple priorities.

Nice-to-haves:

• Experience building Swift apps.
• Familiarity with tools like Figma, Invision, or Adobe XD for design handoffs.
• Experience with sports data or knowledge of the sports industry.
• Interest in or experience with data visualization techniques or libraries for presenting complex statistics.
• Basic understanding of DevOps practices and CI/CD pipelines.
• Previous experience working with confidential data or information.

Job Posting Compensation Range/Rate: Freelance Rate