SaaS Product | Node.Js + Express + TypeScript | Supabase | Multi Portal

Senior Full-Stack Engineer — Code Review & Iteration This is not a greenfield build. The bulk of the product is already complete. I need: 1. A thorough code and architecture review — identify security gaps, performance concerns, scalability risks, code quality issues, and areas that don't follow best practices. 2. Follow-on development — after the review, implement recommended changes, refactors, and feature additions on an ongoing contract basis. I'm looking for a long-term collaborator, not a one-and-done consultant. TECH STACK - Backend: Node.js + Express (TypeScript), monorepo structure - Database: Supabase (Postgres) with Row-Level Security (RLS) for multi-tenant isolation - Hosting: Railway - CDN / Edge: Cloudflare - Error Monitoring: Sentry WHAT I'M LOOKING FOR Required: - Strong Node.js + TypeScript experience (production-grade) - Deep Postgres experience, especially with Row-Level Security and multi-tenant data models - Comfortable reviewing existing codebases and delivering clear, actionable feedback - Familiarity with Supabase and Railway (or equivalent PaaS platforms) - Strong written communication — I need a written review, not just verbal notes Nice to have: - Experience with adapter/connector patterns for third-party integrations (this platform will integrate with district timekeeping and VMS systems) DELIVERABLES (PHASE 1 — REVIEW) - Written architecture and code review document - Prioritized list of issues (critical → nice-to-have) - Recommendations for refactors, security hardening, and best-practice alignment - Discussion / walkthrough call to align on next steps PHASE 2 — ONGOING DEVELOPMENT Once the review is complete and we align on priorities, I'd like to continue working together on an hourly or project basis to implement the recommended changes and build new features.