savienko.com

Personal page

Burgas, Bulgaria

42.50° N, 27.47° E

EET / EEST

UTC+2 / UTC+3 · Remote

Anton Savienko

Status

Open to work

Remote roles
B2B / C2C contract

Get in touch

Senior Full Stack Engineer. React, Next.js, Node.js, NestJS, TypeScript, AWS. AI/LLM in production: Claude, MCP, RAG.

  • 10 yrs

    building web applications

  • 7 yrs

    with Node.js and NestJS

  • End to end

    frontend, backend and deployment

01 Profile

I’m a senior full-stack engineer with 10 years of building web applications — React and TypeScript on the front end, Node.js and NestJS behind it, AWS underneath. At Runtime Verification I designed and built an internal SaaS platform for formal-verification jobs and took an LLM vulnerability-detection tool from concept to production. Now I’m shipping my own AI products and looking for my next remote role.

Target roles

  • Senior Software Engineer
  • Lead Software Engineer
  • Full Stack Engineer
  • AI Engineer

Stack

React, Next.js, TypeScript, Node.js, NestJS, PostgreSQL, AWS, Terraform, GraphQL, Docker

AI

Claude API, MCP, RAG, ElevenLabs

Languages

  • English · professional
  • Ukrainian · native
  • Russian · native
  • Polish · elementary
  • German · elementary

Education

O.M. Beketov National University of Urban Economy, Kharkiv · 2008–2012

02 Now building

Self-employed since Jul 2026 — designing, building and shipping my own AI products end to end.

  • 02.1

    Loro

    A listening-first AI language-learning app for iOS, Android and web, with FSRS spaced repetition.

    Expo · React Native · NestJS · PostgreSQL · AWS · Claude API · ElevenLabs

    github.com/asavienko/loro

  • 02.2

    AI Outbound Voice Agent

    Calls businesses over Twilio, discloses it is an AI, handles discovery and objections, and books demos.

    ElevenLabs · Claude Haiku 4.5 · TypeScript · Hono · 36 Vitest tests

    github.com/asavienko/outbound-agent

03 Runtime Verification

Full Stack Engineer, contract

Dec 2022 – Jul 2026 · Remote · Formal verification and security tooling for smart-contract code

  • 5

    dedicated high-performance machines run verification, symbolic execution and fuzzing jobs on the SaaS platform I designed and built alone.

  • ~50–70%

    fewer false positives from the AI vulnerability-detection tool, shipped as an MCP server and VS Code extension.

  • Minutes

    to triage test failures, down from hours, after integrating the Claude API into CI.

04 Career

  1. 2026–nowSenior Full Stack Engineer, Self-employed
  2. 2022–2026Full Stack Engineer, Runtime Verification
  3. 2022Front-end Developer, StandForUA (volunteer)
  4. 2021–2022Technical Lead, Rentbetta.com
  5. 2020–2021Full Stack Developer, PioGroup Software
  6. 2020Front-end Developer, Esverito
  7. 2019–2020Front-end Developer, Babyroom.ua
  8. 2017–2019Full Stack Developer, BINTIME
  9. 2016–2017Front-end Developer, Babyroom.ua
  10. 2011–2016Head of Sales, Babyroom.ua

Moved from sales into engineering in 2016.

05 Contact

Open to remote roles on a B2B or C2C contract. I’m comfortable taking responsibility for a feature across the frontend, backend, and deployment.