Job Title

We’re building coSow — a new intelligence layer sitting upstream of enterprise software implementation spend. Enterprise software implementations represent hundreds of billions in annual global spend. Yet scoping, pricing, and vendor selection remain manual, inconsistent, and opaque. coSow replaces: Manual discovery calls Subjective scoping Weeks-long proposal cycles With: Structured scoping engine Retrieval-augmented estimation Deterministic rule-based modeling AI-assisted SOW generation A competitive marketplace for implementation partners Risk scoring and benchmarking over time This is not an “AI wrapper.” This is a hybrid system combining: Structured domain modeling RAG pipelines LLM reasoning Deterministic rule engines Multi-tenant SaaS architecture Marketplace mechanics The Role We are looking for a senior engineer who thinks like a systems architect. You will design and ship: RAG workflows over historical implementation data Prompt pipelines grounded in structured ERP domain data Rule-based estimators that parse and validate LLM output Multi-tenant RBAC architecture Marketplace bidding logic Secure production deployment Stack: React + TypeScript Supabase (Postgres, RLS, Edge Functions) LLM APIs Vector search (pgvector or Pinecone) Stripe Secure SaaS infrastructure What Makes This InterestingReal domain complexity (ERP implementations are non-trivial) Deterministic + probabilistic hybrid architecture Enterprise-grade trust requirements Marketplace design problems Opportunity to define the intelligence layer of a massive services ecosystem Who You Are5+ years experience Strong in system design Comfortable with ambiguity Have built or deeply understand RAG systems Understand tradeoffs between LLM outputs and deterministic constraints Care about production quality, not just demos CompensationCompetitive USD contract compensation (6 months) Optional equity discussion for long-term fit Potential transition into founding engineer role If you want to work on something ambitious at the intersection of AI, enterprise SaaS, and marketplace infrastructure - this is that opportunity. Share: GitHub Architecture you’re proud of Your view on LLM + rule-engine hybrid systems