Open to opportunities

Joshua Agbai

@joshuaagbai

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Full-stack Web3 engineer building secure multi-chain wallets and scalable production APIs.

Nigeria

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What I'm looking for

I’m looking to build secure, production-grade Web3 and fintech products—self-custodial wallets, scalable APIs, and polished UIs. I want a team that values testing, clean architecture, and real impact on financial literacy and accessibility.

I’m a Full-stack Software Engineer with 5+ years of experience building scalable web, mobile, and blockchain systems, focused on secure, well-tested APIs and responsive user experiences. I bring strong proficiency in Node.js, Express, React, and RESTful/microservice architectures.

In my recent role as Technical Lead / Mobile Software Engineer, I architected cryptographic solutions for a self-custodial multi-chain crypto wallet supporting Ethereum, BNB Chain, Bitcoin, and Solana. I developed secure mobile transaction flows with gas estimation logic (EIP-1559), integrated blockchain APIs, and built modular, fault-tolerant backend infrastructure for reliable transaction lifecycle handling.

I also ship across the stack—building a progressive web application with React, Supabase, and Deno, and delivering full-stack apps with React, Next.js, Django, Rust, and Java. I’m passionate about fintech and Web3, and I enjoy combining hands-on Python with LLM/Ollama-based service integration to support data and AI-driven reporting workflows.

Experience

Work history, roles, and key accomplishments

Technical Lead, Mobile Developer

PF Flash

Jul 2025 - May 2026 (10 months)

Architected a self-custodial multi-chain crypto wallet supporting Ethereum, BNB Chain, Bitcoin, and Solana, including ERC-20 asset handling. Built secure mobile transaction flows with EIP-1559 gas estimation and integrated blockchain APIs, and designed scalable REST-based backend infrastructure with modular services.

Solidity Solana EIP 1559 Gas Estimation REST APIs

Full Stack Developer

MyRatecard

Mar 2025 - Mar 2025 (0 months)

Built a scalable progressive web application using React with Supabase and Deno, using modular routing and clean separation of concerns. Applied edge computing approaches to improve global load times and deliver a responsive UI.

React Deno Supabase Edge Computing Global Load Time Optimization

Web Developer & Instructor

NVIT

Jan 2024 - Oct 2024 (9 months)

Built and taught full-stack applications using React, Next.js, Django, Rust, and Java, including REST API design and backend integration. Mentored learners on production-quality coding practices, code reviews, and testing standards.

React Next.js Django Rust Java RESTful API Design Backend Integrations Code Review Mentorship Standards

Full-Stack Developer

ShopWithCandy

Oct 2019 - Nov 2021 (2 years 1 month)

Implemented a microservice architecture with RESTful APIs for an e-commerce platform, improving flexibility and maintainability. Collaborated with UI/UX and DevOps teams and used AWS to increase reliability and uptime, while authoring unit/integration tests and performing code reviews.

Microservices RESTful APIs AWS E commerce Platform Development Code Review Unit Testing Integration Testing backend architecture