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Joel Emmanuel

Fullstack & Blockchain Developer

ejoel0035@gmail.comjoelemmanuel.devlinkedin.com/in/joel-emmanuel-149708202github.com/joelemmanuelNigeria

Fullstack & Blockchain Developer with 3+ years building scalable Web3 applications, AI-powered platforms, and production systems across international teams in Brazil, USA, Canada, Nigeria, and Ghana. Experienced with Lisk, Ethereum, React, NestJS, Spring Boot, and AWS. AWS Certified Cloud Practitioner and AI Practitioner.

Skills

Frontend:React.js · Next.js · TypeScript · React Native · Tailwind CSS
Backend:NestJS · Node.js · Spring Boot · REST APIs · GraphQL
Blockchain:Ethereum · Solidity · Lisk Blockchain · Smart Contracts · Web3.js
Cloud & AI:AWS (EC2, S3, Lambda, Bedrock, SageMaker) · Docker · CI/CD · LangChain · RAG Systems
Databases:PostgreSQL · MongoDB · Redis · MySQL · Vector Databases

Experience

Personal Project — Avigate
2024 – Present
Nigeria (Remote)
  • •Building Avigate to solve local transit challenges helping users navigate using buses, keke napep, taxis, and okada
  • •Full-stack development with TypeScript, React Native, NestJS, and PostgreSQL
  • •Implemented real-time route matching with complex transfer logic and community-driven features
  • •Built scalable backend APIs with comprehensive security including Google OAuth and TOTP 2FA
Fullstack Developer — Learnway
Dec 2024 – Present
Remote
  • •Building full-stack platform for Learnway blockchain education app on Lisk blockchain
  • •Implementing scalable NestJS APIs for progress tracking and reward distribution
  • •Integrating Lisk smart contracts for token-based educational rewards
  • •Building gamification features including leaderboards and achievement systems
Frontend Engineer — Invillia
Present
Brazil (Remote)
  • •Built enterprise web applications using React and TypeScript
  • •Collaborated with cross-functional teams on scalable solutions
  • •Implemented modern UI patterns for complex business workflows
Frontend Developer — Vivo
2024 – 2025
Brazil (Remote)
  • •Developed React frontend for Vivo B2B fixed-sales e-commerce platform
  • •Implemented Framework Brasil design system components and guidelines
  • •Integrated with Node.js BFF and Java microservices decoupling layer
  • •Part of new squad ramp-up for Vivo's B2B e-commerce expansion
Full-stack Developer — Freedom Ghana
Present
Ghana (Remote)
  • •Built comprehensive ride-hailing platform with React and Node.js serving thousands of daily requests
  • •Architected real-time ride matching with Socket.IO and Google Maps API
  • •Deployed scalable AWS infrastructure with automated CI/CD pipelines
  • •Reduced average wait times by 45% through optimized driver-passenger matching
Full Stack and AI/ML Developer — Compass UOL
Feb 2023 – Present
Brazil (Remote)
  • •Developed e-commerce and enterprise applications with React, Spring Boot, and modern tech stack
  • •Architected AI/ML solutions using AWS services including SageMaker and Bedrock
  • •Built RAG system for Universidade de São Paulo with LangChain and vector databases
  • •Optimized API performance achieving 35% improvement through caching and query tuning
Backend Developer — Rewod Technologies
Oct 2022 – Mar 2023
Nigeria
  • •Developed internal tools using Python and Java Spring Boot
  • •Created data processing pipelines handling millions of records daily
  • •Gained valuable full-stack development experience

Education

Bachelor of Science in Computer Science

University of Port Harcourt — Nigeria

2018 – 2022

Certifications

AWS Certified Cloud Practitioner — Amazon Web Services
Oct 2023 – Oct 2026
AWS Certified AI Practitioner — Amazon Web Services
2024
Huawei Certified Network Associate (HCNA) — Huawei
2023