Principal Platform Engineer
Stitch FixBase Salary
$125k - $209k/yr
Responsibilities
- Own end-to-end technical delivery of platform initiatives from discovery and design through implementation, rollout, and operational readiness.
- Design and build scalable, observable, maintainable shared platform capabilities, APIs, gateways, and backend services.
- Evaluate and prototype AI agents and automated workflows, turning them into safe and reusable platform tools.
- Lead technical design reviews and mentor engineers through code reviews, pairing, and actionable feedback.
- Deliver self-service tooling, automation, and continuous improvements that reduce manual and operationally expensive work.
- Build and operate systems across Ruby/Rails, Python, Rust, React/TypeScript, GraphQL, and cloud infrastructure.
- Evolve platforms so AI agents and automated systems can discover capabilities, execute actions, monitor outputs, and recover from failures safely.
Requirements
- Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.
- Typically 5+ years of experience designing, building, and operating complex production systems in platform, infrastructure, backend, or developer tooling environments.
- Deep experience with distributed architectures, microservices, APIs, and cloud infrastructure.
- Proficiency in Ruby/Rails, Python, or Rust.
- Hands-on experience using and implementing AI-assisted engineering workflows, AI agents, LLM integrations, or Copilot.
- Experience leading complex technical projects end to end, communicating tradeoffs, and influencing cross-functional teams without direct authority.
- GraphQL, API gateway, React, and TypeScript experience is a nice-to-have.
- Experience with e-commerce, personalization, large-scale retail engineering, self-service platform tools for AI agents, open-source software, technical whitepapers, or developer tooling communities is preferred.
Benefits
- Competitive salary, benefits, equity, annual bonus eligibility, and potential restricted stock unit grants.
- Medical, dental, vision, and other health and wellness benefits.
- Inclusive workplace emphasizing diverse perspectives, innovation, integrity, trust, sustainability, and professional growth.
About Stitch Fix
Few things are more personal than getting dressed, but finding clothing that fits and looks great can be a challenge. Stitch Fix solves that problem. Stitch Fix is the leading online personal styling service that helps people discover the styles they will love that fit perfectly so they always look - and feel - their best. Through our team of expert stylists and best-in-class AI and recommendation algorithms, we leverage our assortment of exclusive and national brands to meet each client’s individual tastes and needs, making it convenient for our clients to express their personal style without having to spend hours in stores or sifting through endless choices online. Stitch Fix, which was founded in 2011, is headquartered in San Francisco.