Available for senior / lead full-stack roles and carbon-infrastructure contracts.

Oleh Kruchai

Full-Stack & Web3 Engineer

Ukraine · remote worldwide

Full-stack engineer with 10+ years of experience building scalable production software — from UFC.com and the world's largest German-language dictionary to national climate infrastructure. Spent four years at Reneum / A6 Labs architecting and delivering a blockchain-based Article 6 carbon registry for the Government of Zimbabwe, now carrying over 2 million issued mitigation outcomes. Work across the full stack daily — TypeScript, React, Next.js, Node.js, PostgreSQL — with deep experience in API design, smart-contract integration, containerized deployments, and team leadership. AI-native engineer: built RAG systems and multi-model orchestration pipelines, actively use MCP integrations, and apply AI across coding, architecture, debugging, testing, and documentation as a core part of delivery.

01

Experience

Reneum / A6 Labs

Lead Front-End Developer
July 2022 — June 2026Remote

Joined as the company built RWA tokenization products; stayed through its evolution into A6 Labs (founded January 2025), focused on Article 6 of the Paris Agreement (6.2, 6.4, 6.8).

Zimbabwe Carbon Registry

2025–2026

Led the frontend for the world's first blockchain-based national carbon registry under Article 6, built for the Government of Zimbabwe (live at zicma.org.zw). Mandatory national infrastructure — all carbon project developers must register and transact through the platform — serving a market that supplies roughly 12.5% of Africa's carbon credits.

  • Delivered the platform now carrying 2,024,197 issued mitigation outcomes (tCO₂e), 1,307,855 corresponding adjustments reported under the Paris Agreement, and 20,767 retirements across 25 registered projects and 333 users (as of July 2026)
  • Architected the frontend from scratch as a configurable, multi-country SaaS platform — hybrid layout system serving the public registry, developer onboarding, and admin panel from one codebase
  • Built data-heavy interfaces for credit issuance, transfer, retirement, and certificate registries, integrating blockchain and smart-contract flows into a UI usable by non-technical government and developer users
  • Implemented a token-based design system in close partnership with the design team
  • Led a team of three engineers (senior, mid, junior), mentoring across levels and setting frontend standards

RWA & carbon tokenization platform

2022–2024

Built the platform for trading and issuing tokenized environmental assets — carbon credits and renewable energy certificates representing megawatts generated by solar, wind, and other near-zero-footprint sources, with certification issued on-chain.

  • Delivered the trading platform used by both credit producers and traders
  • Built certificate issuance and verification interfaces backed by blockchain records, across web, mobile, and tablet
Credit Lifecycle

Schematic view of a carbon credit through the registry

event   ISSUE
credit  CRD-0001
from    —  →  to ACCT-REGISTRY
note    verified project · vintage 2026
TypeScriptReactReact NativeNode.jsPostgreSQLSoliditySmart contractsDockerDesign systems

Duden

Senior Developer
2021Remote

Senior developer on duden.de — the world's largest German-language online dictionary.

  • Built and maintained features for a high-traffic reference platform serving millions of German-speaking users
  • Part of the team developing a spell- and grammar-checking service, a German-language counterpart to Grammarly
  • Worked in a headless architecture: Drupal and PHP on the backend, React on the frontend
PHPDrupalHeadless ReactJavaScript

Endeavor

Full-Stack Developer
2019 — 2020Kyiv

Full-stack developer on UFC.com — one of the highest-traffic sports properties in the world.

  • Built features across the stack: Drupal and PHP on the backend, JavaScript on the frontend
  • Delivered advanced animation and interaction work with GSAP under real performance and scale constraints
  • Contributed to a flagship, globally recognized product
PHPDrupalJavaScriptGSAPAdvanced CSSAnimation

Full-stack, frontend and web development roles, 2016–2019.

02

Skills

Languages

TypeScriptJavaScriptPHPSolidity

Frontend

ReactNext.jsReact NativeAdvanced CSSGSAPAnimationDesign systems (token-based)

Backend

Node.jsExpressREST/GraphQL API designPostgreSQLMongoDBDrupal

Infrastructure

Docker (8+ years)CI/CDContainerizationServer deploymentCloud platforms

Web3

Smart contractsOn-chain dataWallet integrationRWA tokenization

AI & Engineering

RAG systemsMulti-model orchestrationMCP integrationsAI-native development workflow

Domain

Article 6 (6.2 / 6.4 / 6.8)Paris AgreementCarbon registriesMRVRenewable energy certificates

Working

Technical leadershipMentoringSaaS product developmentFluent EnglishRemote-first
03

Education

MSc, Computer Science

Lutsk National Technical University

2018Information Control Systems and Technologies
04

Contact

Emailo@kruch.ai
LinkedInlinkedin.com/in/olegkruchay
GitHubgithub.com/kruchai