Antoinette Janus

Senior Full-Stack Software Engineer |based in Seattle, Washington | E-mailacj.gfx@gmail.com | (703) 470-7607 | https://linkedin.com/in/internette | https://acjanus.com

LinkedIn | GitHub | Portfolio

Summary

Senior Frontend Engineer with 10+ years building accessible, performant web applications across e-commerce, media, and SaaS. Deep expertise in TypeScript, React, and design systems — with a track record of leading 0→1 initiatives, from redesigns to component libraries adopted across multiple teams. Experienced in full-stack work (Node.js, GraphQL, Go), CI/CD pipelines, and embedding accessibility into the build process, not bolted on after the fact.

Experience

Senior Software Engineer, XFactor | JAN 2025 - PRESENT

  • Led design system architecture and cross-team adoption as the sole frontend specialist on a backend-heavy engineering team — establishing component standards, documentation, and contribution patterns from the ground up.
  • Owned and shipped a full application redesign, introducing Next.js and migrating the existing codebase to align with the new design system.
  • Drove AI-assisted frontend workflows using Copilot, accelerating component development and design system migration across the team.
  • Built full-stack features in TypeScript, React, and Node.js with Redis integration, collaborating closely with backend-focused engineers to own the frontend layer end to end.
JAN 2025 - PRESENT

Software Engineer II, LuLuLemon | JULY 2019 - SEPT 2024

  • Served as Design System liaison across Checkout and My Bag teams, introducing epic-level design system change tracking to proactively reduce tech debt and keep a 15+ component library aligned across teams.
  • Led E2E testing initiative using Cypress — mentored a junior engineer through implementation and owned the full handoff to QA, including documentation and onboarding.
  • Maintained 75% test coverage across Checkout and My Bag with Jest; championed testing culture on a 5-person team within a 3-team org.
  • Conducted accessibility audits and introduced Google Lighthouse into the CI/CD pipeline, ensuring ongoing WCAG compliance without manual intervention.
  • Participated in on-call rotation with full incident ownership — responding to production issues, writing postmortems, and maintaining runbooks.
  • Built and led implementation of new features using React, TypeScript, Next.js, and GraphQL with comprehensive test coverage.
JULY 2019 - SEPT 2024

Software Engineer, PBS Kids | MAY 2017 - MAY 2019

  • Developed interactive producer sites using Craft CMS, React, Vue, PHP, and Twig.
  • Debugged and optimized JavaScript-based games.
  • Built internal tools and expanded PHP-based APIs; introduced GraphQL and ElasticSearch.
  • Ensured accessibility standards and led audits.
MAY 2017 - MAY 2019

Software Engineer, FastOrientation | APR 2016 - FEB 2017

  • Ported features from Angular 1 to Angular 2; integrated Angular 2 into existing build chain.
  • Wrote semantic HTML, CSS, and JavaScript with full Jasmine test coverage.
  • Collaborated with designers to deliver responsive, branded user interfaces.
APR 2016 - FEB 2017

Skills

Frameworks: React, Next.js, Node.js, GraphQL/Apollo, Vue

Tools: Storybook, Lighthouse, Redis, Cloudwatch, Splunk, Sentry

Languages: TypeScript, JavaScript, HTML, CSS/SCSS

Testing: Jest, Cypress, Jasmine, Sinon, Mocha