Name: Kelvin Ngendo
Role: Senior Blockchain Engineer
Experience: 8+ Years
Email: nderebakelvin@gmail.com
Phone: +254 108 057 818
Location: Nairobi, Kenya (Remote)
Core Technical Skills
Toolchain & Ecosystem
About Me
Senior Blockchain Engineer with 8+ years of hands-on experience architecting and shipping production-grade DeFi protocols, smart contracts, DAOs, and Web3 infrastructure across EVM-compatible chains (Ethereum, BNB Chain, Polygon, Avalanche, Multichain), Solana, Bitcoin Core, Cardano, and Hyperledger Fabric.
Deep expertise in Solidity, Web3.js, and Ethers.js — spanning token engineering (ERC-20/721/1155/4626), AMM/DEX design, yield-farming mechanics, multi-signature wallet infrastructure, and cross-chain bridge contracts. Possess a strong command of zero-knowledge cryptography (zk-SNARKs & zk-STARKs), enabling the implementation of privacy-preserving protocols and scalability solutions at the protocol layer.
At BTM Malaysia, co-engineered the Beep and Odin Web3 applications that generated over $3 million in revenue from hundreds of thousands of users within 6 months. As CTO & Co-Founder of AgroAfrica, spearheaded the design of a distributed-ledger solution that enables African farmers to sell produce directly on a global market — eliminating brokers and ensuring full supply-chain traceability through verifiable on-chain records.
Proven technical leader: experienced in directing cross-functional engineering teams, conducting smart contract audits, architecting cloud DevOps pipelines on AWS, Azure, GCP, and Digital Ocean, and communicating complex blockchain concepts clearly to non-technical stakeholders and investors.
Resume
Senior Blockchain Engineer — Professional Timeline & Credentials · Download Full CV ↗
Summary
Kelvin Ngendo
Remote Senior Blockchain Engineer · Full-Stack Web2 / Web3 · Expert in Solidity, TypeScript, Node.js, React, and DeFi Protocol Design · Smart Contract Auditor · Ex-Blockchain Engineer at Energi & Attrace
- Nairobi 00100, Kenya — Available Worldwide (Remote)
- +254 108 057 818
- nderebakelvin@gmail.com
Education
Bachelor of Science — Information Technology
2012 – 2016
Dedan Kimathi University of Technology (DeKUT), Nyeri, Kenya
Graduated with distinction in software engineering and distributed systems. Active member of ACCA and CSOK professional clubs. Worked part-time as a database administrator and web developer for county government agencies and SACCOs.
Certifications & Recognition
Blockchain & Smart Contract Development
Ongoing
- Ethereum Foundation — Solidity development track
- OpenZeppelin — Secure smart contract design patterns
- Hardhat & Foundry advanced testing methodologies
- Zero-Knowledge Proof engineering (Circom / SnarkJS)
Professional Experience
CTO & Co-Founder — AgroAfrica
January 2019 – Present
Nairobi, Kenya · Remote
- Architected a full Distributed Ledger Technology (DLT) platform revolutionising the African agricultural supply chain — delivering traceability, autonomous payments, and direct market access for farmers.
- Led a cross-functional team of 5 engineers; defined technical roadmap, sprint planning, and code-quality standards.
- Designed and audited all on-chain smart contracts and off-chain backend integrations end-to-end.
Full-Time Blockchain Developer — AXKLedger
January 2024 – October 2024
Nairobi, Kenya
- Developed, tested, and deployed the AXKLedger backend on Azure Ubuntu VM and DLT smart contracts on the LISK testnet using Solidity, Hardhat, Web3.js, and Ethers.js.
- Built the backend API with Express.js, Knex, Redis, and PostgreSQL — enabling brokerage-free produce trading with on-chain supply-chain verifiability.
Blockchain Engineer — Energi (NRG)
2019 – 2022
Remote
- Contributed to EVM smart contract development and security hardening for the Energi blockchain — one of the most secure Proof-of-Stake EVM networks.
- Implemented staking contracts, governance modules, and cross-chain bridge logic.
Full-Stack Blockchain Developer — BTM Malaysia
November 2017 – October 2018
Cyberjaya, Malaysia · On-site
- Engineered the Beep and Odin DApps, generating $3M+ revenue from 100k+ users in under 6 months.
- Developed ERC-20/ERC-865/ERC-223 tokens, BTC/ETH wallets, payment gateways, and DAO contracts.
- Managed DevOps via AWS Linux, GitHub, JIRA, and Trello; configured NGINX and automated Cron jobs.
Web3 Protocol Engineer — Attrace
Contract · Remote
Netherlands-based Referral Protocol for Web3
- Built and audited referral tracking smart contracts on the Attrace protocol — a decentralised affiliate layer for DeFi projects.
Services
End-to-end blockchain and full-stack engineering services — from protocol design to production deployment
DeFi Protocol & Smart Contract Engineering
Full-cycle design, development, testing, and deployment of DeFi protocols — AMMs, lending platforms, staking contracts, DAOs, ERC-20/721/1155/4626 tokens — on EVM, Solana, and Hyperledger.
Smart Contract Security Audit
Comprehensive source-code audits covering reentrancy, integer overflow, access control flaws, oracle manipulation, and front-running. Delivered as a detailed security report with remediation guidance.
Zero-Knowledge Proof Engineering
Implementation of zk-SNARK and zk-STARK circuits using Circom and SnarkJS for privacy-preserving applications, scalable rollups, and identity verification systems.
Full-Stack Web3 DApp Development
End-to-end DApp development combining on-chain logic with polished React/Next.js frontends, Node.js/NestJS backends, Wagmi/Viem wallet integrations, and The Graph subgraph indexing.
Cross-Chain Bridge & Integration
Design and implementation of cross-chain messaging bridges, interoperability layers, and multi-chain deployment pipelines across EVM, Solana, Cardano, and Hyperledger Fabric.
Web3 DevOps & Cloud Infrastructure
Production-grade DevOps for blockchain nodes and backend services — CI/CD pipelines, AWS/Azure/GCP provisioning, NGINX configuration, Docker containerisation, and 24/7 uptime management.
Years Experience
Projects Delivered
Million $ Revenue Generated
Blockchains Deployed On
Portfolio
Selected blockchain projects — live protocols, DApps, and enterprise DLT deployments
Pricing
Transparent hourly rates for senior-level blockchain and full-stack engineering engagements
DeFi Protocol & Smart Contract Engineering
$85 / hr
Smart Contract Security Audit
$80 / hr
Zero-Knowledge Proof Engineering
$100 / hr
Full-Stack Web3 DApp Development
$70 / hr
Backend API & Database Engineering
$60 / hr
Cloud DevOps & Linux Server Management
$55 / hr
Fixed-price project quotes available on request. Get in touch →
Contact
Available for remote engagements worldwide — reach out directly via any channel below
Location
Nairobi 00100, Kenya — Remote Worldwide
Call / WhatsApp
+254 108 057 818
nderebakelvin@gmail.com