{"schemaVersion":"jobsearcher.job.v1","id":"40fd1f96fc669bb2acd1ab5d","url":"https://jobsearcher.com/jobs/40fd1f96fc669bb2acd1ab5d","canonicalUrl":"https://jobsearcher.com/jobs/40fd1f96fc669bb2acd1ab5d","title":"Senior Full Stack Engineer","description":"Overview\nAs a Senior Full Stack Engineer at Sincere, you own end-to-end product improvements across a broad stack, influencing customer value and UX. You collaborate with product, design, and DevOps to identify pain points, shape solutions, and ship high-quality features. You’ll leverage AI-assisted development tools and monitor product impact to drive pragmatic tradeoffs and reliable experiences. This role offers ownership, cross-functional impact, and opportunities to shape large-scale customer-facing applications.\n\nCompensation / Benefits100% Health, Dental & Vision coverage401K Plan with Profit ShareAnnual bonus potentialHealth & Wellness stipendsPaid time off plus 12 paid holidays & Summer FridaysPaid parental leave\nResponsibilitiesBuild full-stack features across Ruby on Rails and Next.jsOwn product initiatives end-to-end from ideation to launch and iterationPartner with product managers and designers to identify pain points and opportunitiesLeverage AI-assisted tools (Claude Code, Codex) to explore, develop, test, and shipMake practical technical decisions balancing speed, quality, and maintainabilityDeliver polished, user-focused experiences with strong UXUse Datadog and Mixpanel to monitor production behavior and inform decisionsChampion new ideas and continuously improve products and engineering practices\nKey requirements7+ years of professional software developmentProficiency across Ruby on Rails, TypeScript, React, Next.js, MySQL/Postgres, Redis, MongoDB, Sidekiq, OpenSearch, AWS, DockerFluent with AI-assisted development tools (Claude Code, Codex)Experience building and maintaining large-scale customer-facing web appsProduct-minded with strong instincts for customer needs and business valueSelf-starter who brings structure to undefined problems and executesCollaborative with DevOps, understanding of cloud infrastructure (AWS), TerraformPragmatic improvement of existing architectures and codebasesCollaborative and low-egoStrong communication and craft prideDetail-oriented with a focus on customer experienceRuby on RailsTypeScriptReact","company":"Sincere","rawCompany":"sincere","city":"Somerville","state":"MA","isRemote":false,"isActive":false,"createdAt":"2026-09-15T04:01:41.539Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Full Stack Engineer","description":"Overview\nAs a Senior Full Stack Engineer at Sincere, you own end-to-end product improvements across a broad stack, influencing customer value and UX. You collaborate with product, design, and DevOps to identify pain points, shape solutions, and ship high-quality features. You’ll leverage AI-assisted development tools and monitor product impact to drive pragmatic tradeoffs and reliable experiences. This role offers ownership, cross-functional impact, and opportunities to shape large-scale customer-facing applications.\n\nCompensation / Benefits100% Health, Dental & Vision coverage401K Plan with Profit ShareAnnual bonus potentialHealth & Wellness stipendsPaid time off plus 12 paid holidays & Summer FridaysPaid parental leave\nResponsibilitiesBuild full-stack features across Ruby on Rails and Next.jsOwn product initiatives end-to-end from ideation to launch and iterationPartner with product managers and designers to identify pain points and opportunitiesLeverage AI-assisted tools (Claude Code, Codex) to explore, develop, test, and shipMake practical technical decisions balancing speed, quality, and maintainabilityDeliver polished, user-focused experiences with strong UXUse Datadog and Mixpanel to monitor production behavior and inform decisionsChampion new ideas and continuously improve products and engineering practices\nKey requirements7+ years of professional software developmentProficiency across Ruby on Rails, TypeScript, React, Next.js, MySQL/Postgres, Redis, MongoDB, Sidekiq, OpenSearch, AWS, DockerFluent with AI-assisted development tools (Claude Code, Codex)Experience building and maintaining large-scale customer-facing web appsProduct-minded with strong instincts for customer needs and business valueSelf-starter who brings structure to undefined problems and executesCollaborative with DevOps, understanding of cloud infrastructure (AWS), TerraformPragmatic improvement of existing architectures and codebasesCollaborative and low-egoStrong communication and craft prideDetail-oriented with a focus on customer experienceRuby on RailsTypeScriptReact","datePosted":"2026-09-15T04:01:41.539Z","dateModified":"2026-09-15T04:01:41.539Z","hiringOrganization":{"@type":"Organization","name":"Sincere","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Somerville","addressRegion":"MA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"40fd1f96fc669bb2acd1ab5d"},"url":"https://jobsearcher.com/jobs/40fd1f96fc669bb2acd1ab5d"}}