Virlan Costin
Bacau,BC
Summary
I build stuff. I make use of all the tools I can. I don't overengineer. And most importantly, I always make others comfortable around me.
Overview
7
7
years of professional experience
Work History
Technical Lead
Candylabs
06.2025 - Current
- Built the core smart contracts and SDKs for both EVM & Solana (Solidity/Anchor, Node.js) that power NFT interactions and the marketplace.
- Built backend services using Node.js, PostgreSQL, Redis, and AWS that ensured reliability during high-traffic NFT drops.
- Implemented front-end functionality (Next.js, Solana Web3) to enhance user experience for NFT interactions and marketplace features.
- Managed CI/CD and infrastructure, enabling developers to focus on coding without concerns over hosting or deployment.
- Maintained a zero-blocker environment by providing near 24/7 support, ensuring continuous development flow.
- Established coding standards that avoided common bugs typical in similar projects, leading to more reliable development.
- Recruited and onboarded 3 developers who accelerated delivery, cutting project timelines in half.
Full Stack Engineer
Soleats / Byte AI
03.2024 - 06.2025
- Designed and delivered an Uber Eats-style full-stack web application end-to-end, owning front-end, back-end, and database architecture, with Solana-based crypto payments integrated using Next.js, tRPC, PostgreSQL.
- Developed EVM-compatible clones of Soleats platform, leading front-end implementation and addressing back-end challenges to unblock engineering bottlenecks and expedite delivery.
- Integrated and optimized high-latency third-party API, mitigating performance constraints through UI/UX restructuring and async handling, maintaining usability and enhancing user experience.
Full Stack Engineer
Something.Tools
05.2023 - 05.2025
- Developed scalable web applications using React and Node.js frameworks.
- Collaborated with cross-functional teams to define project requirements and scope.
- Implemented RESTful APIs to enhance data communication between front-end and back-end services.
Firmware Engineer
Elektrobit
Brașov
10.2019 - 06.2021
- Integrated embedded features into firmware, applying complex AUTOSAR standards to ensure functionality across various hardware platforms using C and Python.
- Developed comprehensive unit tests for firmware features, verifying correctness, reliability, and maintainability using Python and relevant testing frameworks.
- Troubleshot complex firmware and software issues, assisting users in resolving technical challenges through dedicated customer support.
Education
Bachelor of Engineering - BE - Computer Science
Universitatea Transilvania din Brașov
Brașov, Romania06-2020
Skills
- Nextjs
- Nodejs
- Smart contract development (Solana & EVM)
Websites
Languages
English
Proficient (C2)
C2
Romanian
Proficient (C2)
C2
Timeline
Technical Lead
Candylabs
06.2025 - Current
Full Stack Engineer
Soleats / Byte AI
03.2024 - 06.2025
Full Stack Engineer
Something.Tools
05.2023 - 05.2025
Firmware Engineer
Elektrobit
10.2019 - 06.2021
Bachelor of Engineering - BE - Computer Science
Universitatea Transilvania din Brașov