Senior Backend Engineer - San Francisco California

Company: Tonal Systems, Inc.
Location: San Francisco, California
Posted On: 05/09/2025

OverviewTonal is looking for a passionate Senior Backend Engineer to work cross-functionally with product, engineering, and design, and play a critical role in building the platform 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.What You Will Do

• Impact and contribute to the development of major software projects for our backend services. These services drive everything in our platform from personalized workout recommendations to dynamic media generation and distribution, and analytics based on the largest and most advanced fitness data set in the world
• Collaborate with our tightly integrated software, hardware and content teams to continually evolve a unique, consumer-oriented fitness product
• Work closely with product team to clarify requirements and develop designs for new features
• Implement, test, deploy and monitor software for our cloud-based backend microservices
• Write and review clean, secure and testable code with a focus on maintainability, scalability and performance
• Develop and support cloud-based big data pipelines
• Use analytics to understand product behavior and motivate data-driven decisions
• Mentor and share your broad knowledge with more junior engineersWho You Are
  • A self-driven backend engineer, with experience owning software projects end-to-end and a desire to work in a fast-paced, iterative, and collaborative environment.
  • 3+ years of software development experience
  • Track record of solving problems end-to-end
  • Experience with distributed systems, microservices architecture, cloud platforms (AWS, Azure or GCP) and RESTful APIs
  • Expertise in server-side software development in Golang (or other languages, e.g. Rust, C++, C#, Java, Python)
  • Strong understanding of database design and modeling (e.g., PostgreSQL)
  • Excellent communicator with the ability to work collaboratively and cohesively in a cross-functional team
  • Experience with data-intensive applications, big data pipelines and analytics, having used tools such as Snowflake, DataBricks, Amplitude and Looker
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