Dragoljub Saric

Dragoljub Saric

Mentor
Rising Codementor
US$10.00
For every 15 mins
ABOUT ME
Blockchain | Solidity | Web3 Engineer
Blockchain | Solidity | Web3 Engineer

Seasoned Senior Blockchain Engineer with 7+ years of expertise in designing, developing, and securing smart contracts across Ethereum, Solana, and Layer 2 solutions. Proficient in Solidity, Rust, and Vyper, with a track record of deploying high-stakes decentralized applications (dApps) for DeFi protocols, NFT marketplaces, and DAOs. Skilled in end-to-end smart contract lifecycle management—from architecture and coding to rigorous auditing using tools like Slither, MythX, and manual review.

Led teams in delivering 15+ scalable blockchain solutions, optimizing gas efficiency by 40% and preventing vulnerabilities through formal verification and comprehensive security practices. Experienced with frameworks like Hardhat, Foundry, and OpenZeppelin, and adept at cross-functional collaboration to align technical execution with business goals.

Belgrade (+02:00)
Joined January 2025
EXPERTISE
5 years experience
5 years experience
5 years experience
5 years experience
3 years experience
5 years experience
6 years experience

REVIEWS FROM CLIENTS

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EMPLOYMENTS
Senior Blockchain Engineer
KoloTree
2022-03-01-2023-10-01

• Led the development of scalable blockchain solutions for decentralized finance (DeFi) and enterprise use cases.
• Collaborated w...

• Led the development of scalable blockchain solutions for decentralized finance (DeFi) and enterprise use cases.
• Collaborated with cross-functional teams to design smart contracts that reduce operational costs and improve security standards.
• Played a critical role in ensuring deployed solutions adhered to blockchain best practices and supported the project's long-term scalability.
• Designed and developed Solidity smart contracts optimized for gas efficiency, achieving a 30% reduction in gas costs through advanced optimization techniques.
• Conducted detailed security audits of smart contracts, significantly reducing vulnerabilities and ensuring alignment with OWASP Blockchain Security guidelines.
• Provided technical mentorship and conducted workshops to help team members and clients adopt blockchain solutions.
• Supported seamless integration with frontend applications by ensuring interoperability between blockchain systems and user-facing components.• Achievements:
• Delivered secure and gas-efficient contracts that enhanced project profitability.
• Contributed to seamless project delivery by preparing comprehensive technical documentation.
• Improved the team’s understanding of blockchain concepts through structured knowledge-sharing sessions.

Node.js
TypeScript
JavaScript
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Node.js
TypeScript
JavaScript
Solidity
Web3
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Senior Frontend Developer
KoloTree
2021-01-01-2022-03-01

• Developed a variety of customer-facing applications, including an invoicing platform for Norwegian businesses and multiple e-commerc...

• Developed a variety of customer-facing applications, including an invoicing platform for Norwegian businesses and multiple e-commerce applications.
• Focused on creating intuitive user interfaces and efficient backend systems, ensuring excellent performance and usability.
• Designed and implemented responsive UIs and reusable components using modern frameworks like React and React Native.
• Integrated third-party APIs and ensured data consistency across platforms using tools like GraphQL.
• Conducted code reviews, ensuring maintainable and scalable codebases.• Achievements:
• Delivered production-ready applications that met client expectations for usability and performance.
• Streamlined development processes by creating reusable components and detailed developer documentation.

Python
TypeScript
React
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Python
TypeScript
React
JavaScript
React Native
GraphQL
Next.js
Ui5
Tailwind css
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Web3 Frontend Engineer
Vivid Labs
2017-03-01-2020-12-01

• Contributed to the development of a next-generation NFT platform, enabling users to create, manage, and trade NFTs within a decentra...

• Contributed to the development of a next-generation NFT platform, enabling users to create, manage, and trade NFTs within a decentralized ecosystem.
• Focused on improving interoperability with multiple blockchains and wallets while delivering an intuitive user experience.
• Designed and implemented features for multi-chain wallet integrations to support seamless user interaction with Ethereum, Binance Smart Chain, and Polygon networks.
• Created user interfaces for cryptocurrency wallets, ensuring responsiveness and usability across devices.
• Researched and documented APIs for Web3 interactions, integrating node service providers and AWS for backend support.• Achievements:
• Successfully integrated support for new wallet solutions, enhancing platform adoption by end-users.
• Delivered scalable solutions for NFT minting and trading, contributing to the platform's overall functionality and user retention.

TypeScript
React
JavaScript
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TypeScript
React
JavaScript
Web3
Next.js
Ui5
Vue.js
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PROJECTS
NFT GeneratorView Project
2022
AI-driven NFT Generator Platform
AI-driven NFT Generator Platform
Python
Node.js
Ethereum
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Python
Node.js
Ethereum
Solidity
IPFS
Next.js
NFT
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