Vetted engineers with verified commercial track record in Supabase
Khmelnytskyi, Ukraine
Full-Stack Developer, Fractional CTO — Websites, Apps, Servers, Databases, AI, SEO & QA
Full-stack developer working across the entire stack — websites, apps, servers, databases, AI integrations, SEO, and QA. Languages & Core: writes code in JavaScript, TypeScript, Python, PHP, Go, and Rust. Architects scalable systems for large-scale projects. Frontend & Interfaces: builds websites and web applications with React and Next.js. Crafts responsive interfaces with Tailwind CSS, Radix UI and Shadcn, adds smooth animations with Framer Motion, and interactive charts with Recharts. SEO Audit & On-Page Optimization: semantic keyword research, resolving technical indexing issues, and optimizing page load speeds. Structures page architecture, meta tags, and multi-language support (i18n). Copywriting & Content Strategy: writes technical articles, drafts precise content briefs for writers, and develops content plans. QA & Testing: full-cycle testing for websites, web services, and Android apps — manual QA for UI/UX and business logic, plus automated testing with Jest, Vitest, Playwright and E2E. Backend, Cloud & Databases: complex API integrations of any scale. Builds servers with Node.js (Express, Fastify). Works with PostgreSQL, MySQL and MongoDB, ORMs (Prisma, Drizzle), and cloud infrastructure (Supabase, Firebase, Cloudflare). Browser Extensions & Automation: develops Manifest V3 browser extensions for Chrome, Edge, Firefox and other browsers. Builds web scrapers for complex data extraction using Puppeteer and Playwright. AI & Intelligent Agents: builds custom AI agents and integrates LLMs from OpenAI, Google Gemini, and Anthropic Claude via API, including Claude Code setups. Servers & DevOps: Linux (Ubuntu) and VPS administration — setup, updates, real-time monitoring, secure process isolation, Nginx, PM2, and CI/CD deployment via GitHub Actions. Telegram Bots: develops advanced Telegram bots (Telegraf, Grammy) integrated with AI, payment gateways, Google Sheets, and crypto exchanges. Desktop Applications: builds cross-platform software for Windows and macOS using Electron and Rust. Additional expertise: site development and customization with WordPress and Astro.
Supabase provides an exceptional backend-as-a-service foundation on top of PostgreSQL, offering instant REST APIs, real-time subscriptions, and authentication. However, digital agencies often bill $140 to $220 per hour while treating Supabase as a generic black-box backend, frequently neglecting critical database security policies.
ProofDevs connects you directly with independent senior Supabase developers who understand underlying PostgreSQL mechanics, write airtight Row-Level Security (RLS) policies, and deploy secure Edge Functions at transparent rates between $45 and $95 per hour.
| Engagement Metric | Web Development Agency | ProofDevs Independent Senior |
|---|---|---|
| Hourly Billing Rate | $140 – $220 / hr | $45 – $95 / hr |
| RLS Architecture | Often permissive policies exposing tables via public API | Airtight Row-Level Security with tenant isolation |
| Contractual Lock-in | Multi-month minimum retainers | None (book by specific task or weekly sprint) |
| Direct Communication | Account managers and ticket dispatchers | Direct technical collaboration with the engineer |
| Code Ownership | Proprietary agency scaffolding | 100% client-owned Supabase migrations and Edge Functions |
Because Supabase exposes PostgreSQL tables directly to client frontends via PostgREST, Row-Level Security (RLS) is your application's primary defense barrier. A single missing RLS policy allows unauthorized users to query or mutate private records using the public anon API key.
Senior Supabase engineers architect multi-tenant RLS policies using indexed tenant IDs (`auth.uid() = user_id`), preventing cross-tenant data leaks and avoiding performance degradation on large tables.
They also build Deno Edge Functions for sensitive operations: handling Stripe webhooks, generating signed URLs for Supabase Storage, and triggering asynchronous background workflows.
Senior Supabase developers manage database schemas through version-controlled SQL migration files using the Supabase CLI, avoiding manual table edits in the web dashboard.
Architecture Rule: The Subquery RLS Performance Trap
Using unindexed subqueries inside RLS policies forces PostgreSQL to re-evaluate the subquery for every examined row, slowing queries to a crawl. Senior engineers optimize RLS policies using indexed joins and security definer functions.
Timelines for standard commercial Supabase engineering tasks.
Independent Supabase engineers charge between $45 and $95 per hour. You retain 100% intellectual property ownership of all migration files, Edge Function repositories, and Supabase project configurations upon milestone signoff.
You will receive matches with available senior Supabase specialists within 2 to 4 hours of submitting your technical requirements.
Rates range from $45 to $95 per hour, based on expertise in PostgreSQL RLS, Edge Functions, and Supabase Auth.
Yes. Our engineers audit all public tables, eliminate permissive RLS policies, and verify that unauthorized client requests are strictly blocked.
Yes. All schema changes, functions, and triggers are authored in version-controlled migration files for reproducible deployments.
You own 100% of all Git repositories, migration files, and project credentials upon milestone completion.
