{"schemaVersion":"jobsearcher.job.v1","id":"650044dcc22291f034f7054a","url":"https://jobsearcher.com/jobs/650044dcc22291f034f7054a","canonicalUrl":"https://jobsearcher.com/jobs/650044dcc22291f034f7054a","title":"Senior Product Engineer, React Native + Backend","description":"About Base\nBase is a platform for in-real-life social connection and community. Our Members are accomplished people who have built careers, families, and reputations. They come to Base for what their calendars are missing: regular, in-person time with peers they actually want to know. The gathering is the product.\n\nThe systems that make it possible are what this role exists to protect.\n\nEngagement\nContract: 4 to 6 week paid audit, with the option to extend into implementation.\n\nAbout the Role\nWe're looking for a senior, hands-on engineer to audit and stabilize a consumer mobile product and its internal admin tool, HomeBase. This is a 4-week paid trial: come in, understand the system fast, separate the real problems from the noise, and ship. It's a stabilization engagement, not a net-new feature role. The long-term build-and-own seat is a separate Tech Lead position.\nThe system spans a React Native + Expo mobile app, a TypeScript monorepo, two backend APIs on AWS (a member-facing API and an admin/back-office API) that run the Stripe payment, subscription, and refund integrations, a Supabase Postgres database with hundreds of migrations, an automation and data-integration layer (n8n-style workflows plus reverse-ETL into downstream tools), and Metabase reporting. Parts of it are mid-migration and lightly tested.\nThis is not a greenfield build. We need someone who can quickly understand an existing codebase, identify architectural and execution risks, separate real problems from noise, and ship fixes that hold.\n\nWhat You'll Do\nAudit the React Native + Expo mobile app and the HomeBase admin flows.\nReview the backend and API structure, the Postgres data models, and the business logic around bookings, guests, cancellations, refunds, credits, and notifications.\nTrace the payment path (Stripe) and the automation / data-integration layer (n8n-style workflows and reverse-ETL) for fragility and silent-failure points.\nIdentify technical debt, broken workflows, security gaps, stale code, and missing tests.\nReview Linear and project artifacts, and compare planned work against what actually shipped.\nProduce a prioritized technical recovery plan.\nShip or supervise one small but meaningful stabilization fix during the trial.\nRecommend the exact team needed to continue: mobile, backend, data, QA, or design.\n\nMust Have\nSenior or staff-level full-stack experience shipping production React Native + TypeScript apps.\nStrong backend experience building and operating GraphQL APIs on a relational database (Postgres or similar), deployed on a cloud provider. We run AWS + Supabase.\nHands-on Stripe across subscriptions, refunds, invoices, webhooks, and reconciliation, integrated into backend services (ours run on AWS).\nYou've worked inside messy, partially-migrated, lightly-tested systems and brought order without freezing delivery.\nYou make fast, pragmatic judgment calls in unfamiliar code and explain them clearly to a non-technical founder.\nComfort working without perfect specs.\n\nNice to Have\nExperience with Metabase or analytics cleanup\nExperience migrating away from NativeBase, NativeWind, or inconsistent styling systems\nExperience with mobile release pipelines, QA automation, push notifications, and email workflows\nPrior startup rescue, code audit, or fractional CTO experience\nExpo and EAS builds in production, with manual store submission (no OTA).\nApollo Client and GraphQL on the front end.\nSupabase specifically (Auth, Postgres, Storage).\nAutomation glue and reverse-ETL: n8n, Hightouch, Airflow, or similar.\nStripe in a booking, marketplace, or membership context.\nMobile observability and E2E testing: Sentry, PostHog, Maestro.\nMetabase or analytics cleanup.\nMigrating away from NativeBase, NativeWind, or inconsistent styling systems.\nUntangling a codebase mid-rewrite (legacy and new trees coexisting in production).\nPrior startup rescue or code-audit experience.\n\nFirst Deliverables\n\nWithin 5 business days:\nCodebase map: frontend, backend, database, integrations\nTop 10 technical and product risks\nWhat is broken versus merely messy\nEstimate to stabilize HomeBase\nHiring plan for the next 30 to 60 days\n\nWithin 4 to 6 weeks:\nRecovery roadmap\nTechnical debt triage\nRecommended architecture changes\nTest and QA priorities\nOne shipped stabilization improvement, or a verified implementation plan\n\nDetails\nType: Contract (4 to 6 weeks, option to extend) Location: Remote, US Compensation: Candidate-proposed hourly or weekly rate Eligibility: Eligible to work in the US\n\nHow to Apply\nApply through the link below. You'll be asked to share work samples, relevant experience, your availability, and to answer one short screening question:\nDescribe a production system you inherited that had a single point of failure: a sole owner, a fragile integration, no monitoring, or no tests. What did you stabilize first, and why that one?\nAlongside your answer, upload a visual representation of that work: a system map, architecture diagram, data-flow sketch, or whiteboard photo of the system you describe. It can be rough. We want to see how you picture a system, not only how you write about it.\nBase is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status.","company":"Base","rawCompany":"base","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-08-14T13:01:24.170Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-1253.00","title":"Software Quality Assurance Analysts and Testers","slug":"software-quality-assurance-analysts-and-testers"}],"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 Product Engineer, React Native + Backend","description":"About Base\nBase is a platform for in-real-life social connection and community. Our Members are accomplished people who have built careers, families, and reputations. They come to Base for what their calendars are missing: regular, in-person time with peers they actually want to know. The gathering is the product.\n\nThe systems that make it possible are what this role exists to protect.\n\nEngagement\nContract: 4 to 6 week paid audit, with the option to extend into implementation.\n\nAbout the Role\nWe're looking for a senior, hands-on engineer to audit and stabilize a consumer mobile product and its internal admin tool, HomeBase. This is a 4-week paid trial: come in, understand the system fast, separate the real problems from the noise, and ship. It's a stabilization engagement, not a net-new feature role. The long-term build-and-own seat is a separate Tech Lead position.\nThe system spans a React Native + Expo mobile app, a TypeScript monorepo, two backend APIs on AWS (a member-facing API and an admin/back-office API) that run the Stripe payment, subscription, and refund integrations, a Supabase Postgres database with hundreds of migrations, an automation and data-integration layer (n8n-style workflows plus reverse-ETL into downstream tools), and Metabase reporting. Parts of it are mid-migration and lightly tested.\nThis is not a greenfield build. We need someone who can quickly understand an existing codebase, identify architectural and execution risks, separate real problems from noise, and ship fixes that hold.\n\nWhat You'll Do\nAudit the React Native + Expo mobile app and the HomeBase admin flows.\nReview the backend and API structure, the Postgres data models, and the business logic around bookings, guests, cancellations, refunds, credits, and notifications.\nTrace the payment path (Stripe) and the automation / data-integration layer (n8n-style workflows and reverse-ETL) for fragility and silent-failure points.\nIdentify technical debt, broken workflows, security gaps, stale code, and missing tests.\nReview Linear and project artifacts, and compare planned work against what actually shipped.\nProduce a prioritized technical recovery plan.\nShip or supervise one small but meaningful stabilization fix during the trial.\nRecommend the exact team needed to continue: mobile, backend, data, QA, or design.\n\nMust Have\nSenior or staff-level full-stack experience shipping production React Native + TypeScript apps.\nStrong backend experience building and operating GraphQL APIs on a relational database (Postgres or similar), deployed on a cloud provider. We run AWS + Supabase.\nHands-on Stripe across subscriptions, refunds, invoices, webhooks, and reconciliation, integrated into backend services (ours run on AWS).\nYou've worked inside messy, partially-migrated, lightly-tested systems and brought order without freezing delivery.\nYou make fast, pragmatic judgment calls in unfamiliar code and explain them clearly to a non-technical founder.\nComfort working without perfect specs.\n\nNice to Have\nExperience with Metabase or analytics cleanup\nExperience migrating away from NativeBase, NativeWind, or inconsistent styling systems\nExperience with mobile release pipelines, QA automation, push notifications, and email workflows\nPrior startup rescue, code audit, or fractional CTO experience\nExpo and EAS builds in production, with manual store submission (no OTA).\nApollo Client and GraphQL on the front end.\nSupabase specifically (Auth, Postgres, Storage).\nAutomation glue and reverse-ETL: n8n, Hightouch, Airflow, or similar.\nStripe in a booking, marketplace, or membership context.\nMobile observability and E2E testing: Sentry, PostHog, Maestro.\nMetabase or analytics cleanup.\nMigrating away from NativeBase, NativeWind, or inconsistent styling systems.\nUntangling a codebase mid-rewrite (legacy and new trees coexisting in production).\nPrior startup rescue or code-audit experience.\n\nFirst Deliverables\n\nWithin 5 business days:\nCodebase map: frontend, backend, database, integrations\nTop 10 technical and product risks\nWhat is broken versus merely messy\nEstimate to stabilize HomeBase\nHiring plan for the next 30 to 60 days\n\nWithin 4 to 6 weeks:\nRecovery roadmap\nTechnical debt triage\nRecommended architecture changes\nTest and QA priorities\nOne shipped stabilization improvement, or a verified implementation plan\n\nDetails\nType: Contract (4 to 6 weeks, option to extend) Location: Remote, US Compensation: Candidate-proposed hourly or weekly rate Eligibility: Eligible to work in the US\n\nHow to Apply\nApply through the link below. You'll be asked to share work samples, relevant experience, your availability, and to answer one short screening question:\nDescribe a production system you inherited that had a single point of failure: a sole owner, a fragile integration, no monitoring, or no tests. What did you stabilize first, and why that one?\nAlongside your answer, upload a visual representation of that work: a system map, architecture diagram, data-flow sketch, or whiteboard photo of the system you describe. It can be rough. We want to see how you picture a system, not only how you write about it.\nBase is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or veteran status.","datePosted":"2026-08-14T13:01:24.170Z","dateModified":"2026-08-14T13:01:24.170Z","hiringOrganization":{"@type":"Organization","name":"Base","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"650044dcc22291f034f7054a"},"url":"https://jobsearcher.com/jobs/650044dcc22291f034f7054a"}}