12+ years in development field and
4+ years developing secure DeFi protocols and Web3 infrastructure. Proven track record deploying high-volume projects and preventing multi-million dollar exploits through security audits.
Key Achievements
2,472 ETH generated from deployed NFT collections
$114M+ TVL secured through audited contracts with zero incidents
Critical vulnerabilities identified for Tier-1 exchanges (Crypto.com, HTX)
Cross-chain payroll infrastructure processing millions monthly
Core Stack
Smart Contracts: Solidity (Expert) • Hardhat • Foundry • OpenZeppelin
Protocols: Ethereum • Polygon • Arbitrum • Base • BSC
DeFi: Uniswap V2/V3/V4 • Compound • AAVE • Chainlink • Circle CCTP
Security: Smart contract auditing • Formal verification • Vulnerability research
Recent Impact
Currently building Uniswap V4 integrations and Circle CCTP solutions, while conducting security audits for major exchanges. Full-stack Web3 developer with deep expertise in both development and security.More...
Henri van Eetveldt
Head of Engineering Team@Rubicon Group Holding
Verified
I have worked in diverse teams tackling a myriad of complex problems over the past decades. Most of my experience has come in the building of projects and companies operating in the renewable energy markets of South Africa and the UK.
Through these roles, I've gained experience in business development, management, engineering, marketing and cultural leadership.
I'm an excellent team player and proven leader, always ready for a new challenge.
Friends define me as curious, passionate individual, and idea generator and a doer.More...
Liam McGrath
Chairman & Co-founder@We Are Rubicon
Verified
With a solid background in soft sales, CRM, sales analytics, business development, and partnerships, and over 10 years experience, I look forward to working with you to take your business activities to the next level.More...
Sumeja Doljancic
Client Delivery Manager@Rubicon
Verified
Sumeja Doljancic is an experienced IT professional with over 7 years of diverse experience in the tech industry. She has excelled in multiple roles, including 3 years as a QA Engineer, 5 years as a Project Manager/Scrum Master, and 1 year as a Client Delivery Manager.
Sumeja has a proven track record of successfully managing freelance projects, often collaborating with 3-4 teams in parallel to ensure timely delivery and high-quality results. Her experience spans working with international teams across various time zones, including Asia, Europe, Africa, and both Americas.
She has led DevOps, data, mobile, and web development teams, leveraging her expertise in project management tools such as Jira, Confluence, Trello, Azure DevOps, and Notion, while maintaining seamless communication via Slack and Teams.
A skilled communicator and leader, Sumeja is adept at building strong team dynamics and reporting effectively to management. She is well-versed in Scrum and Agile methodologies, where she has facilitated all ceremonies, managed budgets, and ensured projects met deadlines.
Sumeja's commitment to delivering excellence makes her a valuable asset to any organization.More...
Quentin Sims
Senior Software Engineer@Zenzero
Verified
Solution-oriented and problem solver with 5+ years of experience building and maintaining
software and software architecture. Highly skilled in communication, collaboration, and technical
documentation.More...
Valerie Moye
Customer success and product ops@Authorium (formerly City Innovate)
Verified
I have over a decade as an enterprise CSM at high growth SaaS startups. My super powers are streamlining product and CS operations, product enablement, defining product requirements, usability testing, enabling customer self-service strategies, and distilling the Voice of the Customer.More...