{"schemaVersion":"jobsearcher.job.v1","id":"8b34fb3f4fe7fc4d4ffcdc64","url":"https://jobsearcher.com/jobs/8b34fb3f4fe7fc4d4ffcdc64","canonicalUrl":"https://jobsearcher.com/jobs/8b34fb3f4fe7fc4d4ffcdc64","title":"Founding Engineer","description":"Hybrid Role: 85% remote, but requires 3 nights on-site in Miami or NYC every month. This is NOT a remote position. Candidates must live in these locations, have valid work authorization, and be fully bilingual (English/Spanish). Please apply only if you meet these specific criteria.About The CompanyOur partner is a stealth-stage legal technology company applying AI to plaintiff-side litigation at institutional scale, with eyes toward reinventing the way law is practiced end-to-end. They operate at the intersection of special situations litigation and litigation finance building infrastructure that doesn't yet exist in the legal industry. They raised a seed round that was 75% oversubscribed in February 2026, and they're building the team that will define how this company grows.Their engineering culture is small, deliberate, and high-stakes. This isn't a place where you hand off tickets and wait for feedback. It's a place where precision matters, where the domain has real consequences, and where the expectation is that you think in systems, not features.The RoleWe're looking for a Founding Builder Engineer; the next person to join the core team. This isn't a job description for an engineer slot. It's an invitation for someone who has already proven they belong in the top 1% of their craft and wants to build something that matters.You'll work across the full stack — backend-first, owning architecture end-to-end, and with taste for elegant and convenient UX/UI while collaborating closely with a product-leaning counterpart. You'll design systems around AI, not just use it. LLM orchestration, agentic workflows, MCP integrations.The domain is regulated and high-precision. Prior exposure to legal tech, compliance-adjacent data pipelines, or enterprise SaaS in a domain with real stakes is a strong signal. You understand why a wrong output has consequences and you build accordingly.What We're Looking ForYou have Software engineering depth with a backend-first instinct. You're comfortable owning complex platforms and products end-to-end without hand-holding, and you've shipped production-grade systems that you'd stand behind today.You're AI-native by default. You design systems with and for AI, not around it. You've built with LLMs in production not as a feature, but as infrastructure.You operate at high autonomy, low maintenance, low ego. You communicate precisely, flag blockers early, ship in fast-moving environments, and don't need structure imposed from above.You've worked in a domain where precision matters: legal, compliance, healthcare, fintech. You know what it means to be wrong in a regulated context.Tech StackFrontend: Next.js 16, React 19, TypeScript 5.9, Tailwind CSS 4, shadcn/ui, Radix UI, Recharts, MapLibre GL, Framer Motion, Lucide ReactAI: Anthropic Claude API (SDK), Server-Sent Events streaming, custom agentic tool system, dynamic skill loading from S3Backend: Next.js API routes, Auth.js (NextAuth v5), Drizzle ORM, PostgreSQL, DuckDB, S3-backed Parquet filesData Pipeline: Python 3.13, Hive-partitioned Parquet on S3, DuckDB analytical engineLogisticsBased in New York or Miami preferred; exceptional candidates in other locations consideredPerson fluent in English and Spanish85% remote with monthly in-person meetings in New York and Miami (3 nights)Monster equity: 0.20%–0.99% of the business as of May 2026 — meaningful, early-stage ownership in a well-funded company4-round interview process: founder screen (25 min) → blind work sample → half-day panel (ethics + adversarial assessments) → social event with the teamFounding Builder — New York / Miami","company":"Katapult Labs","rawCompany":"katapult labs","city":"Miami","state":"FL","isRemote":false,"isActive":false,"createdAt":"2026-04-22T18:40:17.863Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"23-1011.00","title":"Lawyers","slug":"lawyers"},{"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":"Founding Engineer","description":"Hybrid Role: 85% remote, but requires 3 nights on-site in Miami or NYC every month. This is NOT a remote position. Candidates must live in these locations, have valid work authorization, and be fully bilingual (English/Spanish). Please apply only if you meet these specific criteria.About The CompanyOur partner is a stealth-stage legal technology company applying AI to plaintiff-side litigation at institutional scale, with eyes toward reinventing the way law is practiced end-to-end. They operate at the intersection of special situations litigation and litigation finance building infrastructure that doesn't yet exist in the legal industry. They raised a seed round that was 75% oversubscribed in February 2026, and they're building the team that will define how this company grows.Their engineering culture is small, deliberate, and high-stakes. This isn't a place where you hand off tickets and wait for feedback. It's a place where precision matters, where the domain has real consequences, and where the expectation is that you think in systems, not features.The RoleWe're looking for a Founding Builder Engineer; the next person to join the core team. This isn't a job description for an engineer slot. It's an invitation for someone who has already proven they belong in the top 1% of their craft and wants to build something that matters.You'll work across the full stack — backend-first, owning architecture end-to-end, and with taste for elegant and convenient UX/UI while collaborating closely with a product-leaning counterpart. You'll design systems around AI, not just use it. LLM orchestration, agentic workflows, MCP integrations.The domain is regulated and high-precision. Prior exposure to legal tech, compliance-adjacent data pipelines, or enterprise SaaS in a domain with real stakes is a strong signal. You understand why a wrong output has consequences and you build accordingly.What We're Looking ForYou have Software engineering depth with a backend-first instinct. You're comfortable owning complex platforms and products end-to-end without hand-holding, and you've shipped production-grade systems that you'd stand behind today.You're AI-native by default. You design systems with and for AI, not around it. You've built with LLMs in production not as a feature, but as infrastructure.You operate at high autonomy, low maintenance, low ego. You communicate precisely, flag blockers early, ship in fast-moving environments, and don't need structure imposed from above.You've worked in a domain where precision matters: legal, compliance, healthcare, fintech. You know what it means to be wrong in a regulated context.Tech StackFrontend: Next.js 16, React 19, TypeScript 5.9, Tailwind CSS 4, shadcn/ui, Radix UI, Recharts, MapLibre GL, Framer Motion, Lucide ReactAI: Anthropic Claude API (SDK), Server-Sent Events streaming, custom agentic tool system, dynamic skill loading from S3Backend: Next.js API routes, Auth.js (NextAuth v5), Drizzle ORM, PostgreSQL, DuckDB, S3-backed Parquet filesData Pipeline: Python 3.13, Hive-partitioned Parquet on S3, DuckDB analytical engineLogisticsBased in New York or Miami preferred; exceptional candidates in other locations consideredPerson fluent in English and Spanish85% remote with monthly in-person meetings in New York and Miami (3 nights)Monster equity: 0.20%–0.99% of the business as of May 2026 — meaningful, early-stage ownership in a well-funded company4-round interview process: founder screen (25 min) → blind work sample → half-day panel (ethics + adversarial assessments) → social event with the teamFounding Builder — New York / Miami","datePosted":"2026-04-22T18:40:17.863Z","dateModified":"2026-04-22T18:40:17.863Z","hiringOrganization":{"@type":"Organization","name":"Katapult Labs","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Miami","addressRegion":"FL","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"8b34fb3f4fe7fc4d4ffcdc64"},"url":"https://jobsearcher.com/jobs/8b34fb3f4fe7fc4d4ffcdc64"}}