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Fullstack Engineer I (TypeScript focused) – Handshake AI

Handshake

$200,000 - $240,000
Sep 5, 2025
San Francisco, CA, US
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Handshake AI is a human data labeling business that leverages the scale of the largest early career network to build a new generation of human data products for the world's leading AI research labs, aiming to shape the future of AI through better data, better tools, and better systems.

Requirements

  • Strong experience as a fullstack engineer, with a focus on frontend development.
  • Worked with ReactJS, Typescript and PostgreSQL.
  • Comfortable working across the stack, from crafting performant frontend interfaces to designing and consuming backend APIs.
  • Worked on LLM products in production.

Responsibilities

  • Regular collaboration on a cross-functional team with a designer, product manager and other engineers.
  • Engage frequently with engineers, support, marketing and data analysts across the organization.
  • Lead by example in maintaining a high standard of quality in your own work and in the feedback provided to peers in code review and architecture discussions.
  • Lend your technical knowledge and experience to influence the team’s roadmap and prioritization of innovation and operational health initiatives such as quality control and on-call.
  • Provide mentorship to engineers and unblock and support your team to meet deliverables.
  • Lead sizable individual projects and projects that require multiple engineers.
  • Crafting performant frontend interfaces to designing and consuming backend APIs.

Other

  • Day-to-day work will feature regular collaboration on a cross-functional team with a designer, product manager and other engineers.
  • You will also engage frequently with engineers, support, marketing and data analysts across the organization.
  • Thrive in a high-velocity environment and can execute quickly while maintaining high standards, adapting seamlessly as priorities shift and new challenges emerge.
  • Demonstrate ownership-mentality and maintain a high degree of accountability for your work.
  • Demonstrated success collaborating with partners in product, design and analytics to define, build, and ship great products and experiences.
  • Act with empathy when working with fellow engineers and coworkers, and enjoy providing mentorship and guidance to enable and support your team.
  • Strive for individual and team growth, proactively seeking feedback and identifying areas of the code, processes or procedures that need improvement.
  • Strong communicator and can articulate technical concepts and rationale to audiences of varying technical knowledge levels.
  • San Francisco, CA | 5 days/week in-office