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I'm Dennis Mwanji Wanja, a Senior Blockchain & AI developer based in Nairobi, Kenya. I design and ship secure, high-performance fintech and cross-border payment systems, with hands-on expertise across Web3, AI, and scalable backend architectures. I thrive in cross-functional teams, leading tech strategy as a CTO/Technical Leader, building end-to-end solutions using TypeScript, Rust, Python, React, Next.js, and Solidity across multi-EVM chains, Solana, and DeFi protocols. I enjoy turning complex problems into reliable, compliant systems that traders and developers rely on daily.…I'm Dennis Mwanji Wanja, a Senior Blockchain & AI developer based in Nairobi, Kenya. I design and ship secure, high-performance fintech and cross-border payment systems, with hands-on expertise across Web3, AI, and scalable backend architectures. I thrive in cross-functional teams, leading tech strategy as a CTO/Technical Leader, building end-to-end solutions using TypeScript, Rust, Python, React, Next.js, and Solidity across multi-EVM chains, Solana, and DeFi protocols. I enjoy turning complex problems into reliable, compliant systems that traders and developers rely on daily.

Dennis Mwanji Wanja

Full Stack Developer, Blockchain Developer, AI Engineer, +1

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I'm Dennis Mwanji Wanja, a Senior Blockchain & AI developer based in Nairobi, Kenya. I design and ship secure, high-performance fintech and cross-border payment systems, with hands-on expertise across Web3, AI, and scalable backend architectures. I thrive in cross-functional teams, leading tech strategy as a CTO/Technical Leader, building end-to-end solutions using TypeScript, Rust, Python, React, Next.js, and Solidity across multi-EVM chains, Solana, and DeFi protocols. I enjoy turning complex problems into reliable, compliant systems that traders and developers rely on daily.…I'm Dennis Mwanji Wanja, a Senior Blockchain & AI developer based in Nairobi, Kenya. I design and ship secure, high-performance fintech and cross-border payment systems, with hands-on expertise across Web3, AI, and scalable backend architectures. I thrive in cross-functional teams, leading tech strategy as a CTO/Technical Leader, building end-to-end solutions using TypeScript, Rust, Python, React, Next.js, and Solidity across multi-EVM chains, Solana, and DeFi protocols. I enjoy turning complex problems into reliable, compliant systems that traders and developers rely on daily.

Available to hire

I’m Dennis Mwanji Wanja, a Senior Blockchain & AI developer based in Nairobi, Kenya. I design and ship secure, high-performance fintech and cross-border payment systems, with hands-on expertise across Web3, AI, and scalable backend architectures.

I thrive in cross-functional teams, leading tech strategy as a CTO/Technical Leader, building end-to-end solutions using TypeScript, Rust, Python, React, Next.js, and Solidity across multi-EVM chains, Solana, and DeFi protocols. I enjoy turning complex problems into reliable, compliant systems that traders and developers rely on daily.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Chief Technology Officer / Lead Engineer at Dollar Markets

January 1, 2021 - December 31, 2022

Led the engineering roadmap as CTO/Lead Engineer, delivering a real-time FX aggregator (Dollars App) that aggregates currency rates from major banks to enable seamless cross-border transactions. Architected and implemented high-performance backend handling millions of transactions with sub-second latency. Built secure, compliance-ready APIs and dashboards for liquidity monitoring, and an automated reconciliation system improving accuracy and operational efficiency. Drove security, PCI-DSS considerations and cross-functional collaboration with product and legal teams.

Senior Blockchain & AI Engineer at NG ENI Labs

October 1, 2022 - Present

Led Web3 & AI initiatives in the Web3 & AI Division: Edges Cards (KC Bank App) architecture based on React Native & Next.js enabling multi-currency card system with microservices for high availability and security; Shop Pop.ink AI-powered e-commerce platform using Next.js & TypeScript with Gemini AI for intelligent recommendations and personalized UX; Tiny Assistants.ai AI platform offering conversational assistants for career development and coding support; Walbi Exchange (2024) AI-powered DeFi exchange enabling automated market making and predictive trading insights. Delivered 20+ DApps across major EVM chains and Solana; mentored junior developers across Kenya, Dubai, Uganda, and Rwanda. Impact: scalable AI and blockchain solutions used by hundreds of thousands of users.

Senior Software Developer at EQ AM Capital

December 1, 2021 - December 31, 2024

Developed over 20 trading bots and algorithms (e.g., God Candle, Day Trader, RSRW) on TradingView; built a unified trading interface across 10+ exchanges with sub-300ms execution; automated risk management and real-time PnL reporting; implemented trading strategies and robust data pipelines across TypeScript, Node.js, Rust, PostgreSQL, and Solana/EVM ecosystems.