Adhil S.

I help founders and teams improve existing SaaS applications: secure the backend, connect external services, fix production issues, and prepare releases for real users. I work with the codebase you already have, without proposing a rebuild unless the architecture genuinely requires one. Where I fit best: 1. SaaS backend security and production fixes Supabase/PostgreSQL RLS, tenant isolation, authentication, authorization, database design, Next.js server-side logic, bug fixes, deployment and release hardening. 2. API and AI integrations Third-party APIs, Google OAuth, LLM/model integrations, structured outputs, document workflows, failure handling and cost-aware execution. The goal is reliable backend behavior, protected credentials and clear error handling, not just a working demo. 3. AI workflows inside existing products Multi-model workflows, human review and approval, document processing, and retrieval-backed features where they fit the product. Selected engineering work: I built a private multi-tenant Next.js/Supabase/PostgreSQL platform foundation with tenant isolation, RLS, server-side authorization, admin configuration and versioned publishing with rollback. I also delivered confidential AI backend workflows with multiple models, human approval, document outputs, cost controls and production deployment. Portfolio work includes Google sign-in, API-backed structured document extraction, and a personal RAG app with source-page citations. Core stack: Next.js, React, TypeScript, Node.js, Python/FastAPI, Supabase, PostgreSQL, Vercel and Render. For an inherited codebase with unclear scope, I can begin with a bounded paid technical audit and prioritized fix plan. If the fix is already defined, I can scope the implementation directly with acceptance criteria and fixed-price milestones.