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Senior Software Engineer, Full-Stack Mobile

Tonal

Salary not specified
Dec 6, 2025
San Francisco, CA, US
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Tonal is looking for a Senior Mobile developer to build the Mobile application that powers the world's most intelligent personal trainer, solving challenging problems in the development of software for a unique consumer fitness product.

Requirements

  • 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 Swift and/or Kotlin programming languages
  • 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
  • Experience in hardware-software integration, computer visions and AI-based applications
  • Familiarity with Apple Health and/or Google Health Connect platforms

Responsibilities

  • 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

Other

  • 5+ years of software development experience
  • 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
  • Passion for fitness, wellness, or health-tech industries
  • Entrepreneurial, thrive in a fast-paced, agile environment, and execute at an A-level.