{"schemaVersion":"jobsearcher.job.v1","id":"3a07babdc76ff84e8ff63567","url":"https://jobsearcher.com/jobs/3a07babdc76ff84e8ff63567","canonicalUrl":"https://jobsearcher.com/jobs/3a07babdc76ff84e8ff63567","title":"Full Stack Engineer (Hayward)","description":"We are hiring a Full-Stack Software Engineer with strong front-end depth to help scale the contributor-facing marketplace and internal operations platform. Our client is building the human data layer for multimodal intelligence and a marketplace that connects domain experts with high-paying AI training opportunities at leading AI labs. You will own product features end-to-end across React, Django and PostgreSQL, working directly with the CTO in a small, high-ownership engineering team.What you will ownBuild end-to-end product features across the contributor-facing marketplace and internal operations platform.Write Django views, serializers and migrations while keeping the React front ends that consume them in sync.Lead front-end architecture decisions and set the bar for UI quality.Contribute to CI/CD pipeline work using GitHub Actions to Elastic Beanstalk.Support deployment infrastructure and operational reliability.Collaborate with product, design and operations to ship features that scale the marketplace.Performance-optimize and debug across React, Django, PostgreSQL and infrastructure layers.Improve the platform experience for contributors, domain experts, operations users and clients.Must-have requirements3-5+ years of full-stack engineering experience with strong front-end leaning depth.Strong React experience and modern front-end fundamentals.Proven ability to own product features end-to-end without dropping quality on either side of the stack.Working knowledge of Django or a comparable back-end framework such as FastAPI, Rails or similar.PostgreSQL fundamentals including indexing, query optimization and transaction semantics.Performance optimization and debugging ability across the full stack.Experience collaborating cross-functionally with product, design and operations teams.Nice-to-have requirementsPrior marketplace engineering at scale up two-sided marketplace company.Founding engineer experience at YC startups or comparable early-stage companies.Django-Q2 or Celery background for background tasks.Multi-frontend monorepo experience using Vite or separate apps sharing a back end.Experience with security-sensitive code: auth flows, payment webhooks or PII handling.Background in data annotation, recruiting tech, expert networks or markIdeal background:3-5+ years of full-stack engineering experienceStrong React and modern front-end fundamentalsWorking knowledge of Django, FastAPI, Rails or a comparable back-end framework PostgreSQL fundamentalsStartup or high-ownership product engineering experience, preferably YC startups or Unicorns.Marketplace, recruiting tech, AI data, annotation or expert-network experience is a strong plusLocation: San Francisco or Europe. Remote acceptable for Europe-based candidates.","company":"Key Technology","rawCompany":"key technology","city":"Hayward","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-05-23T17:52:30.160Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Full Stack Engineer (Hayward)","description":"We are hiring a Full-Stack Software Engineer with strong front-end depth to help scale the contributor-facing marketplace and internal operations platform. Our client is building the human data layer for multimodal intelligence and a marketplace that connects domain experts with high-paying AI training opportunities at leading AI labs. You will own product features end-to-end across React, Django and PostgreSQL, working directly with the CTO in a small, high-ownership engineering team.What you will ownBuild end-to-end product features across the contributor-facing marketplace and internal operations platform.Write Django views, serializers and migrations while keeping the React front ends that consume them in sync.Lead front-end architecture decisions and set the bar for UI quality.Contribute to CI/CD pipeline work using GitHub Actions to Elastic Beanstalk.Support deployment infrastructure and operational reliability.Collaborate with product, design and operations to ship features that scale the marketplace.Performance-optimize and debug across React, Django, PostgreSQL and infrastructure layers.Improve the platform experience for contributors, domain experts, operations users and clients.Must-have requirements3-5+ years of full-stack engineering experience with strong front-end leaning depth.Strong React experience and modern front-end fundamentals.Proven ability to own product features end-to-end without dropping quality on either side of the stack.Working knowledge of Django or a comparable back-end framework such as FastAPI, Rails or similar.PostgreSQL fundamentals including indexing, query optimization and transaction semantics.Performance optimization and debugging ability across the full stack.Experience collaborating cross-functionally with product, design and operations teams.Nice-to-have requirementsPrior marketplace engineering at scale up two-sided marketplace company.Founding engineer experience at YC startups or comparable early-stage companies.Django-Q2 or Celery background for background tasks.Multi-frontend monorepo experience using Vite or separate apps sharing a back end.Experience with security-sensitive code: auth flows, payment webhooks or PII handling.Background in data annotation, recruiting tech, expert networks or markIdeal background:3-5+ years of full-stack engineering experienceStrong React and modern front-end fundamentalsWorking knowledge of Django, FastAPI, Rails or a comparable back-end framework PostgreSQL fundamentalsStartup or high-ownership product engineering experience, preferably YC startups or Unicorns.Marketplace, recruiting tech, AI data, annotation or expert-network experience is a strong plusLocation: San Francisco or Europe. Remote acceptable for Europe-based candidates.","datePosted":"2026-05-23T17:52:30.160Z","dateModified":"2026-05-23T17:52:30.160Z","hiringOrganization":{"@type":"Organization","name":"Key Technology","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Hayward","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"3a07babdc76ff84e8ff63567"},"url":"https://jobsearcher.com/jobs/3a07babdc76ff84e8ff63567"}}