tigoni

Blockchain Engineer

Smart Contract and Web3 Developer with over 8 years of backend development experience and a strong focus on both Ethereum ecosystem (Solidity, EVM, Layer 2s - Polygon, zkSync) and Cardano (Plutus, Aiken). Skilled in designing and deploying secure, scalable smart contracts and integrating them with robust backend systems to power full-stack decentralized applications. Proven track record in startup environments as a founding engineer and early-stage contributor, leading the development of MVPs, smart contract architectures, and backend infrastructure. Experienced in freelance consulting for Web3 teams and DAOs, delivering smart contract audits, dApp integrations, tokenomics, and infrastructure solutions. Strong expertise in microservices, cloud-native development (AWS, GCP), and DevOps automation, enabling the delivery of production-grade Web3 systems with high performance, security, and reliability.


Experience: 3 years

Yearly salary: $48,000

Hourly rate: $25

Nationality: 🇰🇪 Kenya

Residency: 🇰🇪 Kenya


Experience

Platform Lead Engineer (Consultant)
C2C Advisory Services Ltd
2024 - 2025
Architected Java-based microservices using Spring Boot, PostgreSQL, and MongoDB for a financial platform that supports 2M+ users, enabling scalable payments and reporting. Integrated M-Pesa via the Daraja API and implemented Kafka for high-throughput transaction processing, increasing TPS by 40%. Managed CI/CD pipelines on Bitbucket/GCP and led API documentation with OpenAPI for seamless front-end integration.
Senior Backend/Blockchain Engineer
Africa Blockchain Centre
2022 - 2024
Designed blockchain integration APIs for AfyaRekod, enabling patient-owned medical data to be shared in a positive way on the Cardano blockchain. Led development of TraceLedger, a blockchain-based track-and-trace solution for coffee bean supply chain transparency. Guided a team of five developers in Agile sprints, introduced code reviews and CI / CD pipelines, improved delivery schedules by 30%.
Software Developer
BandaHealth
2017 - 2021
Developed BandaGo, a mobile medical application for low-resource facilities, with middleware for efficient data caching and optimization of API performance (30% improvement). Led UI redesign, enhancing user adoption, and built custom iDempiere ERP plugins for business logic customization.
IT Officer/Junior Developer
JKUAT University
2011 - 2017
Built web applications for document research management and a proposal submission system, increasing submission rates by 25%.

Skills

backend
java
javascript
node
solidity
english