Emmanuel Joseph
Full-stack Engineer, Blockchain Engineer
I help pre-seed to Series A companies conquer code architecture, scaling, and performance challenges.
About
I'm Emmanuel, a seasoned full-stack software and blockchain engineer dedicated to crafting innovative solutions that address real-world challenges and empower individuals. With 8 years of experience spanning various sectors like Fintech, blockchain, e-commerce, and enterprise software, I specialize in utilizing cutting-edge technologies such as ReactJS, VueJS Solidity, NodeJS, and Golang to architect scalable and user-centric platforms.
Thank you for visiting my portfolio website!
Experience
Lead Engineer · PouchFI Limited
OCT 2025 - Present
Applied MediaWiki-inspired architecture principles—modularity, API-first design, and observability, to build a scalable microservices platform. As Lead Engineer, I designed and delivered a multi-currency wallet onboarding 12,000+ users and processing ₦ 450 M+ in monthly fiat and crypto transactions, implemented on-chain deposit flows via audited Solidity contracts and Ethers.js, and built NestJS services with JWT auth, RBAC, and Redis pub-sub alongside a Next.js dashboard (< 200ms TTFB). I also integrated debit-card issuance APIs—including KYC verification and automated settlement, to achieve sub-5 s transaction confirmations, and led a team of five engineers to ship the MVP in eight weeks with zero critical post-launch incidents.
Lead Engineer · Origineum DWTCA
NOV 2022 - DEC 2024
Spearheaded PiggyFi—a Celo-based money-transfer dApp handling over 1,000 daily transactions via Node.js/Express APIs and Celo SDK integration, and leading the development of OpenLand, a Moonriver NFT land-investment platform managing $200 K+ in assets with a Next.js front end and Go/Echo microservices; I also optimized overall system performance to sub-200 ms TTFB and containerized our infrastructure on AWS using Terraform, achieving 99.8% uptime.
Software Engineer · Wikimedia Foundation
OCT 2021 - NOV 2022
Contributed to the Metrics & Search Interfaces stack by consolidating the event pipeline into a single buffer (−15% complexity), introducing thread-safe configurations to eliminate race conditions, and refactoring client integrations to an exception-driven model (−20% incident fatigue). I also boosted CirrusSearch reliability and recall, developing heuristic recovery mechanisms that cut outages by 30% and adding an apostrophe filter that improved possessive query recall by 25%, all while leveraging Gerrit code-review workflows to streamline patch submissions and mentor new contributors.
Lead Engineer · Decasoft Technologies
OCT 2019 - NOV 2021
Architected and delivered Decafinance—a Laravel & Vue.js lending and savings platform serving over 2,000 ride-hailing drivers and processing ₦82 M (~$200 K) in transactions. I automated loan disbursement and settlement workflows via Flutterwave and Paystack integrations, reducing manual effort by 70%, and implemented Docker-based CI/CD pipelines with GitHub Actions, cutting deployment time in half. Additionally, I mentored a team of four engineers in Agile best practices, fostering collaboration and continuous delivery.
Fullstack Engineer · Software Business Solutions Consulting (SBSC)
JUN 2019 - SEPT 2019
Built EMed HMR, a health management system, and scaled the platform to manage 8 local governments with over 30,000 health records. Revamped the accounting module to improve response time by caching responses and restructuring the database to eliminate unnecessary queries.
Fullstack Engineer · AlphaBeta, Ghana
MAY 2017 - DEC 2017
Maintained and supported an Enterprise Tax Collection System for local governments in Ghana.
Case Study
Fitted.fashion
Platform powering custom and ready to wear apparel production for the fashion industry
Projects
Screen3 ↗
An all-in-one app for recording, organizing knowledge, and sharing video updates