Stephen Ekundayo
Blockchain Engineer building scalable web applications and decentralized solutions
Building decentralized solutions and modern web experiences end-to-end.
Summary
Full-Stack Developer with experience building both modern web applications and blockchain-based solutions. Skilled in React, Next.js, Node.js, and Python for creating scalable frontends and backends, with strong knowledge of REST APIs and databases like MongoDB and MySQL. Also experienced in Web3 development, including dApps, smart contracts, and DeFi platforms. Comfortable working in agile teams and delivering complete products from MVP to production.
Web3 Impact
Built and integrated backend and Web3 applications on Ethereum, Base, Solana and TON blockchains.
AI Projects
Building AI application and integrating AI using Langchain and Langsmith, Google ADK.
Certifications
• Quickstart: LangGraph Essentials
• Project: Deep Research with LangGraph
• Getting Started with DevOps AWS
Technologies
Stacks used daily across frontend, backend, DevOps, and smart contracts.
Next.js
React
TypeScript
Node.js
MongoDB
Solidity
Docker
Prisma
NestJS
Python
Redis
MySQL
Experience
Impact across DeFi, fintech, and education — delivering production systems end-to-end.
Freelance — Fullstack Engineer
Dahcrown Technologies
Remote
- •Built a decentralised file storage solution allowing users to upload, track, and verify files via EVM wallets, with storage linked to token balances. Using Next.js, Pinata IPFS, MongoDB, ethers.js
- •Built backend and Web3 infrastructure for property tokenisation and valuation. Integrated custodian wallet system to improve user onboarding and streamline real-estate purchases. Ethers.js, Solidity
- •Developed and tested Escrow-based smart contract mechanism for credit fintech product. Solidity, hardhat, Remix, Vitest
- •Built and deployed a telegram-based social system for a cryptocurrency token holders. Telegram Bot API, Next.Js, NestJS, REST
Fullstack Web3 Developer
TapTrader
Remote
- •Built scalable Nest.js backend with real-time trade execution and wallet integrations.
- •Developed a Telegram-based crypto trading bot supporting Solana, Ethereum, Base, and TON blockchains, integrating DEXs such as Uniswap and Raydium.
- •Implemented secure smart contract integrations for multi-chain token swaps, handling 1,000+ transactions in test environments.
- •Built job scheduling system for transaction verification with Redis, BullMQ
Fullstack Developer
ExamcompassNG
Remote
- •Collaborated with the development team to build and integrate the frontend to the existing backend infrastructure. Features integrated include authentication, authorisation, dashboard and session management — Vite, Typescript
Fullstack Engineer
Motiv8 Technologies
Minna, Niger
- •Migrated the company website from WP to fully custom HTML/CSS/JS
- •Developed Android-based medical application model — Android Studio, Kotlin
- •Built an application for automating professional exams and verifying plagiarism — Python, Django, Sci-kit
Projects
Production-ready AI and audio automation experiences.
PDF Retrieval Augmented Generation
Typescript, VertexAI, Langchain
Created an AI-powered document indexing and retrieval tool using Typescript, VertexAI, and Langchain.
October 2025
Fake Voice: Text to Speech
Typescript, Langchain, Next.js, Elevenlabs
Built a user interface that enables the automation and download of voice-over scripts via Elevenlabs.
October 2025
Certifications
Proof of continuous learning across LangChain and AWS.
Quickstart: LangGraph Essentials
Typescript - LangChain
Project: Deep Research with LangGraph
LangChain
Getting Started with DevOps AWS
AWS
Education
Bachelor of Engineering in Mechatronics Engineering
Federal University of Technology, Minna
Niger State, Nigeria
Skills
Languages
Typescript, Python, JavaScript, HTML/CSS, Solidity
Frameworks
React, Node.js, Flask, Nest.Js, Next.js, Express, Hono
Tools
Git, Docker, Jest, Vitest, Prisma, Drizzle, MongoDB, PostgreSQL, Langchain, Langsmith, Redis
Collaborate
Let's Build Something Together
Whether it’s shipping a DeFi MVP, automating AI workflows, or scaling a full-stack platform, I can own the delivery from idea to production.Interested in working together? Check out my AI learning journey or get in touch.