Principal Platform Engineer
Stitch Fix
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Job summary
Stitch Fix, a leading fashion-tech company in the United States, is seeking a Principal Platform Engineer to drive platform initiatives, shaping core architecture and AI‑driven workflows across engineering tooling.
You will lead end-to-end delivery, build scalable shared capabilities, mentor engineers, and embrace evolving AI and cloud technologies to boost productivity and reliability while reducing operational friction.
Qualifications
- Bachelor’s degree in CS, Software Eng, or equivalent.
- 5+ years designing, building, and operating complex production systems in platform, infrastructure, backend, or developer tooling.
- Deep experience with distributed architectures, microservices, APIs, and cloud infrastructure; proficiency in Ruby/Rails, Python, or Rust.
- Hands-on experience using AI-assisted engineering workflows (AI agents, LLM integrations, Copilot).
Responsibilities
- Own end-to-end delivery of platform initiatives from discovery through rollout and operations.
- Design and build scalable, observable platform capabilities, APIs, gateways, and backend services for developer experience and performance.
- Prototype emerging technologies, including AI agents and automation, into safe reusable tools.
- Lead design reviews and mentor engineers through code reviews and feedback.
- Deliver self-service tooling and automation to reduce manual work across production systems.
Skills
Education
Tools
Job description
Stitch Fix (NASDAQ: SFIX) Stitch Fix is redefining retail by combining human creativity with advanced data science and Generative AI. As we build the future of personalized shopping, we’re equally committed to building yours. We believe in investing in our team as much as our technology. Join us to be a trendsetter in the industry and help us redefine what’s possible for our clients, while we help you reach your full potential.
Stitch Fix (NASDAQ: SFIX) Stitch Fix is redefining retail by combining human creativity with advanced data science and Generative AI. As we build the future of personalized shopping, we’re equally committed to building yours. We believe in investing in our team as much as our technology. Join us to be a trendsetter in the industry and help us redefine what’s possible for our clients, while we help you reach your full potential.
The Platform organization at Stitch Fix designs, builds, and evolves shared infrastructure and tools to ensure engineering teams deliver software safely, reliably, and efficiently. As a Principal Platform Engineer, you will combine hands‑on technical contribution with independent leadership to solve ambiguous problems and eliminate operational friction across engineering. Partnering closely with Engineering Managers, Architects, Technical Program Managers, and cross‑functional stakeholders, this role acts as a primary technical multiplier for the organization. By shaping core platform architecture and embedding AI‑driven workflows into developer tooling, you directly elevate engineering productivity, system reliability, and overall business velocity.
- Own the end‑to‑end technical delivery of platform initiatives from discovery and design through implementation, rollout, and operational readiness.
- Design and build scalable, observable, and maintainable shared platform capabilities, APIs, gateways, and backend services to streamline developer experience and system performance.
- Evaluate and prototype emerging technologies, including AI agents and automated workflows, turning promising approaches into safe, reusable platform tools.
- Lead technical design reviews and mentor engineers across the organization through code reviews, pairing, and actionable feedback to raise the bar for technical excellence.
- Eliminate manual and operationally expensive work by delivering self‑service tooling, automation, and continuous improvement across production systems.
- Leverage modern AI workflows (e.g., GitHub Copilot, ChatGPT, agentic coding tools) to accelerate software delivery, optimize code quality, and automate routine technical tasks.
- Build and operate systems within our core technical landscape, spanning Ruby/Rails, Python, Rust, React/TypeScript, GraphQL, and cloud infrastructure.
- Evolve core platforms so AI agents and automated systems can safely discover capabilities, execute actions, monitor outputs, and recover from failures independently.
- Adapt quickly to emerging platforms, continuously integrating new tools and methodologies into production environments to maximize engineering efficiency.
- Education: Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.
- Relevant Experience: Demonstrated track record (typically 5+ years) designing, building, and operating complex production systems in platform, infrastructure, backend, or developer tooling environments.
- Technical Expertise: Deep experience with distributed architectures, microservices, APIs, and cloud infrastructure, along with proficiency in languages such as Ruby/Rails, Python, or Rust.
- AI Tooling Capabilities: Hands‑on experience using and implementing modern AI‑assisted engineering workflows (e.g., AI agents, LLM integrations, Copilot) to optimize developer processes.
- Leadership & Collaboration: Strong problem‑solving abilities with proven experience leading complex technical projects end‑to‑end, communicating trade‑offs clearly, and influencing cross‑functional teams without direct authority.
- Physical Requirements: This position may require the ability to sit for extended periods of time, use a computer or other office equipment, and communicate effectively (verbal and written).
- Experience working with GraphQL technologies, API gateways, and modern web frameworks like React and TypeScript.
- Exposure to e‑commerce, personalization, or large‑scale retail engineering ecosystems.
- Proven track record of developing self‑service platform tools that safely expose underlying infrastructure to AI agents.
- Active contributions to open‑source software, industry whitepapers, or technical communities focused on developer tooling and platform engineering.
- We are a group of bright, kind people who are motivated by challenge. We value integrity, innovation and trust. You’ll bring these characteristics to life in everything you do at Stitch Fix.
- We cultivate a community of diverse perspectives— all voices are heard and valued.
- We are an innovative company and leverage our strengths in fashion and tech to disrupt the future of retail.
- We win as a team, commit to our work, and celebrate grit together because we value strong relationships.
- We boldly create the future while keeping equity and sustainability at the center of all that we do.
- We are the owners of our work and are energized by solving problems through a growth mindset lens. We think broadly and creatively through every situation to create meaningful impact.
- We offer comprehensive compensation packages and inclusive health and wellness benefits.
This role will receive a competitive salary, benefits, and equity. The salary for US‑based employees hired into this role will be aligned with the range below, which includes our three geographic areas. A variety of factors are considered when determining someone’s compensation–including a candidate’s professional background, experience, location, and performance. This position is eligible for an annual bonus, and new hire and ongoing grants of restricted stock units, depending on employee and company performance. In addition, the position is eligible for medical, dental, vision, and other benefits.
$125,300—$209,000 USD
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Please review Stitch Fix's US Applicant Privacy Policy and Notice at Collection here: https://stitchfix.com/careers/workforce-applicant-privacy-policy
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