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Dragoljub
Saric

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18
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About me
I’m a senior blockchain engineer with deep experience across Solidity, Rust, TypeScript, and multi-chain ecosystems including EVM, Solana, TON, and Sui. I build production-grade smart contracts, high-performance backend systems, cross-chain features, token/NFT platforms, staking logic, on-chain/off-chain indexers, and scalable microservices. My background includes developing secure DeFi protocols, gamified Web3 products, token launch systems, and real-time event processing pipelines. I focus on clean architecture, gas optimization, reliability, and delivering features end-to-end. I enjoy working on complex protocol challenges, bridging Web2 and Web3, and contributing to products that reach real users.

Work experience

Kaspa Currency
February 2025 – November 2025
Job title
Senior Blockchain Engineer
Work experience & achievements
- Spearheaded the creation of a Pump.fun-style token launch platform, introducing a custom bonding curve pricing model to enhance user engagement and optimize token distribution. - Designed and implemented secure and efficient smart contracts using Solidity, contributing to stable and high-performance decentralized applications. - Streamlined development workflows by leveraging Hardhat for testing frameworks, deployment automation, and enhanced project efficiency. - Utilized Foundry tools to ensure precise debugging and high-performance testing, improving the quality and reliability of contract development while adhering to blockchain industry standards.
Kolo AI
March 2022 – February 2025
Job title
Senior Blockchain Engineer
Work experience & achievements
- Developed and optimized smart contracts using Solidity and Rust, achieving a 30% reduction in gas costs and enhancing transaction efficiency for decentralized finance applications. - Led the development of Rust-based backend services, improving performance and scalability across multiple blockchain networks, including Ethereum and Solana. - Conducted comprehensive security audits on deployed smart contracts, identifying vulnerabilities and ensuring adherence to industry best practices. - Created detailed technical documentation as part of knowledge-sharing initiatives, accelerating onboarding processes for internal teams and clients.
Kolo AI
January 2021 – March 2022
Job title
Senior Full-Stack Engineer
Work experience & achievements
- Engineered decentralized applications (dApps) using Rust for backend services and Node.js for frontend integration, reducing response times and optimizing cross-chain operational efficiency. - Integrated blockchain solutions with third-party APIs, leveraging Rust-based tools to enable seamless data synchronization and interaction with smart contracts. - Collaborated closely with design teams to create user-friendly interfaces for smart contract interactions, ensuring scalability and implementing robust security protocols within DeFi and NFT ecosystems. - Optimized system architecture and backend processes to enhance performance in decentralized platforms, delivering secure, scalable solutions that supported innovation in the DeFi and NFT sectors.
Vivid Labs
March 2017 – December 2020
Job title
Web3 Full-Stack Engineer
Work experience & achievements
- Developed and deployed EVM-based smart contracts for NFTs, enabling DAO functionalities and enhancing decentralized application features for improved user utility. - Optimized backend processes for high-volume NFT minting and trading using Rust, resulting in secure, efficient, and scalable decentralized marketplaces. - Integrated blockchain functionalities such as wallet connections and cross-chain compatibility, streamlining usability across Ethereum and Solana ecosystems. - Enhanced frontend interfaces for cryptocurrency wallets and decentralized applications utilizing React and Next.js, achieving greater responsiveness, security, and user-friendly designs.

Education

University of Belgrade
Graduation year: 2014
Level of study
Bachelor
Major / Field of study
Computer Science