RZ

Ruslan Zholud

Available to hire

I’m Ruslan Zholud, a Fullstack developer with 9 years of experience building secure, user-friendly web and API systems—especially in banking, cryptocurrency, and data management.

About

I’m Ruslan Zholud, a Fullstack developer with 9 years of experience building secure, user-friendly web and API systems—especially in banking, cryptocurrency, and data management. I specialize in React/Next.js and Node.js (Nest/Express/Koa), and I enjoy working on complex product architectures that connect frontend, backend, and blockchain components.

In recent roles, I’ve developed web3 applications and dapp experiences, built microservices on AWS, and collaborated on smart contract development and integrations. I also bring leadership experience from team and technical leadership responsibilities, with a strong focus on problem-solving, attention to detail, and delivering reliable features end-to-end.

  • 8 years' experience
  • Joined April 2026

Languages

  • UkrainianFluent
  • EnglishAdvanced

Industry experience

  • Software & Internet
  • Financial Services
  • Gaming
  • Healthcare
  • Other

More experts in Valencia, Spain

Work experience· 11 roles

Full Stack Developer · X O OBMar 2024 – Apr 2026 · 2 yrs 2 mos

Web3 Telegram application and dApp Next.js application. Full-stack development: API and UI, integrating and editing smart contracts. Microservices, AWS (CloudTrail, S3, CloudWatch, Cognito, Lambda).

Full Stack Developer · Crypto WalletJul 2022 – Feb 2024 · 1 yr 8 mos

Crypto wallet/exchange: React web and React Native apps with a microservices backend. Designed frontend architecture; extended API with features including analytics, user data endpoints, exchange creation/estimation, and swap operations.

Team Lead · CalidoMay 2021 – Jul 2022 · 1 yr 3 mos

Led a team of 4 developers (junior to middle levels) and designed the application architecture for a project management tool with paid subscriptions. Built and extended backend APIs including Stripe integration, Jira integration, and CSV parsing features. Developed major parts of the frontend and implemented multiple PM-focused views such as Kanban, Gantt/calendar, grid-based tables, and detailed panel views.

Team Leader · CalidoMay 2021 – Jul 2022 · 1 yr 3 mos
Full Stack Developer · MobiDevJul 2020 – May 2021 · 11 mos
Full Stack Developer · Avan tiz eSep 2019 – Jul 2020 · 11 mos
Full Stack Developer · A van tiz eSep 2019 – Jul 2020 · 11 mos
Full Stack Developer · EPA MNov 2018 – Sep 2019 · 11 mos

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