{"schemaVersion":"jobsearcher.job.v1","id":"d080c7e6cc1eff33d4833a7e","url":"https://jobsearcher.com/jobs/d080c7e6cc1eff33d4833a7e","canonicalUrl":"https://jobsearcher.com/jobs/d080c7e6cc1eff33d4833a7e","title":"Senior Fullstack Software Engineer","description":"🚀 Senior Fullstack Software Engineer | San Francisco, CA | $200K–$400K + EquityWe’re hiring a Senior Fullstack Software Engineer to help build the web platform for a fast-growing consumer technology company in San Francisco.This is a high-ownership, 0→1 opportunity. You’ll establish the web platform, set React/TypeScript standards, and bring an existing consumer mobile product to the web.What you’ll do• Build and launch a consumer web product from the ground up• Own the end-to-end web stack and frontend architecture• Establish React and TypeScript standards and best practices• Build polished, responsive interfaces with thoughtful motion and micro-interactions• Translate Figma designs into pixel-perfect production experiences• Own internal tools and dashboards• Partner with backend engineers on APIs, data models, and performance• Help establish the foundation for future web and Android experiences• Work autonomously in a fast-moving, high-agency startup environmentWhat we’re looking for• 5+ years of fullstack web engineering experience• Deep expertise in React, TypeScript, and modern JavaScript• Proven experience shipping a 0→1 consumer web product at a startup• Experience owning frontend architecture/platform standards• Strong product sense and exceptional attention to UI/UX details• Experience with animations, motion, responsive design, and pixel-perfect Figma implementation• Comfortable making decisions and shipping quickly with limited direction• Strong collaboration with backend engineers on API design and data modelsBonus• Consumer gaming experience• Payments or real-money product experience• Real-time application experience• React Native experience🎯 This role is especially suited for founders, founding engineers, early startup hires, or engineers who have taken a consumer product from idea → launch → scale.Compensation: $200K–$400K + competitive equityLocation: San Francisco, CAWork arrangement: On-site, 5 days/weekVisa: Open to visa transfers, including OPT/H-1B transfersIf you’ve built and shipped a consumer product from 0→1 and want significant ownership over what comes next, we’d love to hear from you.📩 Apply with your resume and a brief description of the consumer product you personally helped build and launch.","company":"A4assist","rawCompany":"a4assist","city":"Menlo Park","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-09-19T08:52:17.532Z","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":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Fullstack Software Engineer","description":"🚀 Senior Fullstack Software Engineer | San Francisco, CA | $200K–$400K + EquityWe’re hiring a Senior Fullstack Software Engineer to help build the web platform for a fast-growing consumer technology company in San Francisco.This is a high-ownership, 0→1 opportunity. You’ll establish the web platform, set React/TypeScript standards, and bring an existing consumer mobile product to the web.What you’ll do• Build and launch a consumer web product from the ground up• Own the end-to-end web stack and frontend architecture• Establish React and TypeScript standards and best practices• Build polished, responsive interfaces with thoughtful motion and micro-interactions• Translate Figma designs into pixel-perfect production experiences• Own internal tools and dashboards• Partner with backend engineers on APIs, data models, and performance• Help establish the foundation for future web and Android experiences• Work autonomously in a fast-moving, high-agency startup environmentWhat we’re looking for• 5+ years of fullstack web engineering experience• Deep expertise in React, TypeScript, and modern JavaScript• Proven experience shipping a 0→1 consumer web product at a startup• Experience owning frontend architecture/platform standards• Strong product sense and exceptional attention to UI/UX details• Experience with animations, motion, responsive design, and pixel-perfect Figma implementation• Comfortable making decisions and shipping quickly with limited direction• Strong collaboration with backend engineers on API design and data modelsBonus• Consumer gaming experience• Payments or real-money product experience• Real-time application experience• React Native experience🎯 This role is especially suited for founders, founding engineers, early startup hires, or engineers who have taken a consumer product from idea → launch → scale.Compensation: $200K–$400K + competitive equityLocation: San Francisco, CAWork arrangement: On-site, 5 days/weekVisa: Open to visa transfers, including OPT/H-1B transfersIf you’ve built and shipped a consumer product from 0→1 and want significant ownership over what comes next, we’d love to hear from you.📩 Apply with your resume and a brief description of the consumer product you personally helped build and launch.","datePosted":"2026-09-19T08:52:17.532Z","dateModified":"2026-09-19T08:52:17.532Z","hiringOrganization":{"@type":"Organization","name":"A4assist","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Menlo Park","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"d080c7e6cc1eff33d4833a7e"},"url":"https://jobsearcher.com/jobs/d080c7e6cc1eff33d4833a7e"}}