Looking for a job

Eugene Sabynin

@eugenesab

Message

Senior Fullstack Engineer at World (Tools for Humanity)

Georgia

Message

What I'm looking for

I’m a senior fullstack engineer (React, Next.js, TypeScript, Node.js, plus Java/Spring) looking for a product team where I can own features end-to-end, from API design to production. I’m most interested in fintech, crypto and AI-driven products, and I work agent-first day to day with Claude Code.

Open to fully remote roles, or relocation to Poland or Sweden with visa support.

Senior fullstack engineer with 10+ years of experience building web products in digital identity, fintech and e-government. At World (Tools for Humanity) I own products end-to-end: Find an Orb (18M+ verified users), ZKP-based authentication, a WebView <> native JS bridge and a P2P feature built from scratch.

Earlier I built a theming system for a product with 5M MAU, a COVID-19 platform serving 10M MAU, and led a team of 4 engineers. Stack: React, Next.js, TypeScript, Node.js, Java/Spring, GraphQL, PostgreSQL, AWS.

Experience

Work history, roles, and key accomplishments

Current

Senior Fullstack Engineer

Current

Tools for Humanity

Jan 2023 - Present (3 years 9 months)

• Owned end-to-end delivery of Orb on Demand, Benefits, Invites (web) and Rewards.
• Built Find an Orb, a high-traffic WebView for Orb verification (18M+ verified users).
• Integrated ZKP auth into NextAuth.js, later migrated to attested keys.
• Built a WebView <> native JS bridge and a P2P feature for Argentina from scratch.
• Migrated Find an Orb from Vercel to AWS.

Senior Frontend Engineer

Digitally Inspired, part of Intellias

Mar 2022 - Jan 2023 (10 months)

• Developed an admin platform for City Plumbing UK, a major retailer with 700K MAU.
• Built a shared UI component library with unit tests and Storybook docs.
• Introduced a microfrontend architecture across two apps, extracting reusable components into a shared package.
• Optimized Apollo Client caching, cutting redundant GraphQL requests and fixing cache consistency issues.

Senior Fullstack Engineer

BTSDigital

Mar 2019 - Mar 2022 (3 years)

• Built eOtinish, Kazakhstan's national e-gov appeals platform (16M+ appeals processed).
• Frontend of a COVID-19 platform: 10M MAU, 30K concurrent users.
• Theming system for a 5M MAU product, enabling new monetization.
• Built and led a team of 4 engineers; set dev standards.
• Improved page load performance by 2.5x.

Senior Software Engineer

Deutsche Telekom

Dec 2015 - Mar 2019 (3 years 3 months)

• Developed web applications supporting operations at 10+ major European airports.
• Reduced document processing costs by $150K–200K annually through automated document generation.
• Implemented dynamic flight grid configuration with asynchronous real-time updates.
• Migrated a complex legacy app from AngularJS to Angular.
• Tech lead of an internal challenges portal.