Alex V.

Senior Full-Stack Engineer | Next.js, Supabase, OpenAI | 15+ yrs

Senior full-stack engineer with 15+ years shipping software. I build and maintain AI SaaS products end to end: Next.js, React, TypeScript, Supabase, PostgreSQL, Stripe, OpenAI. Expert-Vetted (top 1%), Top Rated Plus, 100% Job Success, 50+ contracts, zero abandoned projects. I work best on long-term engagements: a product I take responsibility for over months, not a one-off build I walk away from. Several of my project clients grew into ongoing retainer partnerships. If you're looking for a senior engineer who stays, answers, and ships, that's the work I do. What I bring - 15+ years of full-stack development, from legacy web platforms to modern React and TypeScript - Production AI SaaS shipped to paying users, not demos - Reliability as a package: commitments kept, on time, responsive, no ghosting - Work like an in-house engineer: daily written updates, GitHub PRs, documented decisions, risks flagged early Experience - Freelance Full-Stack Engineer (2016–present): 50+ contracts, Expert-Vetted. Build and maintain SaaS for founders and small teams. - CTO, inCode Systems (2015): set technical direction, led the dev team, oversaw architecture and delivery. - Head of Development, BTI Pro (2014–2015): assembled and led a cross-functional team of developers, QA, and DevOps building ERP SaaS. - Web Developer, IPC2U (Germany, remote, 2012–2014): maintained and optimized a platform of 34 live production sites. Recent live projects - AuditMake: multi-tenant audit platform. Supabase RLS, role-based access, OpenAI document pipeline, PDF reports, MFA, Docker deployment. - Excello: AI voice coaching platform. LiveKit, ElevenLabs, Stripe subscriptions, session reports. - Valtra: AI invoice verification for construction. LangChain extraction with Zod schemas, savings analytics, multi-tenant admin panel. Stack Next.js (App Router), React 19, TypeScript, Node.js, Supabase (PostgreSQL, RLS, Auth, Storage), Stripe (subscriptions, usage-based, self-service portal), OpenAI and Anthropic APIs, LangChain, pgvector, Docker. I use Claude Code and Cursor daily and review every line they produce. How I work - Available up to 40 hours/week. Timezone EET (Burgas, Bulgaria): good overlap with Europe and US mornings. - Daily written updates, GitHub PRs, documented decisions. - Can usually start immediately. - Fixed-price or hourly. Not available for equity-only roles. Send me one line about your product and what you need. I reply within a day.