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Tonal Logo Tonal · IT - Software Development

Senior Software Engineer, Full-Stack Mobile

United States, San Francisco 165000.00 - 185000.00 USD / Year · Job Posted February 18, 2026
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Job Description

Tonal is looking for a passionate Senior Mobile developer to work cross-functionally with product, engineering, and design, and play a critical role in building the Mobile application that powers the world’s most intelligent personal trainer. You will be given the opportunity to solve challenging problems in the development of software for a unique consumer fitness product. You are entrepreneurial, thrive in a fast-paced, agile environment, and execute at an A-level. Like us, you value clean, fast, high-performing, and maintainable software.

Job Responsibility

  • Design, develop and maintain robust, complex features powered by intelligence, personalization, and computer vision
  • Collaborate cross-functionally with product, design, and engineering teams to deliver high-quality, maintainable solutions of product deliverables
  • Work on cross-platform engineering challenges to elevate the user journey and create seamless, engaging experiences
  • Identify opportunities for improvement in architecture, code coverage, tooling, processes, and propose creative solutions
  • Coordinate with onshore/offshore teams to streamline the development/testing activities
  • Help build a quality-driven engineering culture that values innovation, continuous improvement, and team work
  • Troubleshoot/triage customer issues and perform root cause analysis to identify improvement opportunities

Requirements

  • 5+ years of software development experience
  • Proficient in design principles, architecture patterns and engineering best practices for Flutter based applications
  • Extensive experience in iOS and/or Android Mobile Platform with backend services integration
  • Experience in Dart for multi-platform development and Swift for native iOS
  • Working knowledge of data analytics and logging tools such as Sentry, Amplitude, or OpenSearch
  • Familiar with source control management, CI/CD workflow, and build/release processes
  • High attention to detail, both in code and UI/UX with a creative approach to problem-solving
  • Ability to effectively communicate with technical and non-technical stakeholders

Nice to have

  • BA, BS, or MS in Computer Science/Engineering or equivalent
  • Experience in hardware-software integration, computer visions and AI-based applications
  • Familiarity with Apple Health and/or Google Health Connect platforms
  • Passion for fitness, wellness, or health-tech industries

What we offer

  • Offers Equity
  • health insurance
  • retirement savings benefits
  • life insurance and disability benefits
  • flexible paid time off
  • parental leave
Tonal - All Job Offers

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