Samuel Keyala Mwanza
Blockchain Developer & Smart Contract Engineer
Lusaka, Zambia
EVM smart contract developer specializing in DeFi protocols, supply chain authentication, and on-chain governance. 7+ years background in systems and network engineering. Works remotely with EU/UK teams, deploying production contracts and contributing to blockchain security audits. Approaches contracts with both a builder's and attacker's mindset.
Work Preferences
Salary
GBP 80,000 – 140,000
Skills
Work Experience
Blockchain Systems Analyst (Remote)
Eternal Decay Metaworld
Sept 2024 — Dec 2024
Developed smart contracts for in-game assets and economy systems. Optimized gas efficiency, achieving 15%+ savings in contract deployment. Built ERC-20/721 implementations with full test coverage. Implemented upgradeable proxy patterns (UUPS) for protocol evolution. Verified consistency between on-chain contracts and off-chain systems.
Technical Support Engineer (Remote Freelance)
IT-ARMI
Jul 2024 — Present
Deployed and maintained EVM validator and full nodes, achieving 99.9% uptime. Optimized RPC infrastructure for institutional clients, reducing latency by 25%. Hardened node infrastructure across Linux, firewalls, and VPNs. Monitored blockchain systems to ensure protocol stability and performance.
Ambassador (Remote Part-time)
Sub7Security
Apr 2023 — Present
Facilitated technical workshops and community discussions on blockchain security and vulnerability patterns. Performed preliminary security reviews and codebase analysis to identify common smart contract vulnerabilities like reentrancy and logic errors. Collaborated with the technical team to document audit findings and translate complex security risks into actionable reports for developers.
Networks Engineer (Onsite)
Zamnet Communications Limited
Apr 2013 — Jul 2019
Network design and implementation for LAN/WAN environments. Infrastructure security and hardening via access control, firewalls, and VPNs. Performance optimization and monitoring to reduce latency and operational incidents. Maintenance and troubleshooting of hardware and software issues to maintain high system uptime.
Education
University of Zambia
Computer Networking
2011 – 2013
National Institute of Public Administration
Advanced Diploma · Computer Systems Engineering
2007 – 2010