Software Engineer II, Fellow Development

Handshake•San Francisco, CA

5d•$190,000 - $210,000•Onsite

About The Position

As a Software Engineer II on Fellow Development, you’ll build the learning, feedback, and community systems that help Handshake AI’s network of AI trainers do their best work. You'll own features end-to-end, drive technical design, and ship tools that directly shape how tens of thousands of people train and evaluate AI models. This role rewards engineers who are curious about the problem, not just the code. You'll work closely with PMs, operators, and the L&T team to understand what makes a great fellow experience, translate that into reliable, scalable systems, and own the outcome from first line of code to launch.

Requirements

3–5 years of professional software engineering experience building full-stack applications
Strong proficiency in TypeScript across frontend and backend surfaces
Hands-on experience with modern web stacks (React, Next.js, GraphQL)
Solid command of relational databases (PostgreSQL) and thoughtful data modeling
Track record of owning features independently and driving them to completion
Strong communicator who collaborates well with product, design, and cross-functional partners
Comfortable navigating ambiguity and making sound tradeoffs in a fast-paced environment

Nice To Haves

Strong user-facing product instincts — you care as much about the experience as the implementation
Background in edtech, learning platforms, or tools that help people improve at something
Familiarity with workflow orchestration tools like Temporal or async job systems

Responsibilities

Own features end-to-end across frontend and backend, from scoping and technical design through launch and iteration
Build the full-stack systems that power how fellows learn, get feedback, and improve their work
Partner closely with product and design to translate ambiguous requirements into polished, reliable user experiences
Contribute meaningfully to architecture discussions and help establish patterns the team can build on
Write clean, well-tested, maintainable code and actively participate in code reviews
Collaborate across engineering, L&T, and operations to understand how your work lands and iterate based on real usage
Proactively identify and address technical debt, reliability gaps, and performance bottlenecks