Sviat O.

Building an AI prototype is fast. Turning it into a reliable product that doesn't break under real users, or quietly drain your cloud budget, is where most founders without a technical co-founder get stuck.

I step in as your Tech Lead or Fractional CTO. I take ownership of your architecture, untangle fragile AI-generated or contractor code, and make sure your app holds up in production without forcing a costly rewrite.

WHY FOUNDERS KEEP ME ON (1,300+ hr longest contract, 180+ hr average):

• Proven in AI SaaS: Lead Engineer of LIVEDAB since 2023 (5,300+ commits, multi-tenant AI photo and video pipelines on Replicate, OpenAI, Gemini, and Remotion AWS Lambda). • Founder mindset: I built and run my own profitable AI SaaS (Mosfoto, built with NextJS, Postgres, Stripe, and Replicate). I care about unit economics and shipping, not over-engineering. • AI-native, test-driven: I use Claude Code daily behind strict test suites and codebase rules so AI-generated code actually holds up. "He put real thought into working with AI coding tools, setting up rules and structure in the codebase so the generated code actually fit." (Past Client)

WHAT I HANDLE FOR YOU:

• Technical Ownership: Roadmap sequencing, PR reviews, and plain-English product trade-offs. • Production Readiness: Multi-tenant security, DB migrations, Stripe billing, background jobs, and cutting wasted cloud spend (recently fixed a runaway script draining cloud budget at Genvision). • Reliable AI Pipelines: Validated LLM outputs, durable workflows that survive restarts, and image, video, and audio generation.

HOW WE START:

We begin with a 1-week fixed-price codebase audit (you get a clear written plan of risks, priorities, and fixes) or a single scoped milestone, then move to a weekly retainer if we click. You work 100% directly with me, and every handover is fully documented:

"Sviatoslav is one of the few I kept on for close to a year... When he handed his work over, he documented every step so nobody was left guessing." (Past Client)

Stack: TypeScript, NextJS, React, NodeJS, NestJS, PostgreSQL, Supabase, AWS, Vercel, Stripe, OpenAI, Anthropic, Replicate, Remotion, Playwright.

Stuck on a release or worried about your codebase? Send me a message with a quick note on what's breaking, and I'll tell you how I'd fix it.