Open to opportunities

Celestin Indishimiye

@celestinindishimiye1

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Full-stack engineer specializing in secure, high-performance web apps across React/Next.js and Python/FastAPI.

United States

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What I'm looking for

I’m looking to build production-grade web products end-to-end—shipping secure, fast experiences with modern React/Next.js and Python/FastAPI, and partnering closely with teams to deliver reliable features that match business goals.

As a seasoned full-stack engineer with over 8 years of experience, I design, build, and scale production-grade web applications. I focus on developing secure, high-performance web apps that align with business goals, bringing deep expertise across the modern JavaScript and Python ecosystems.

I bring advanced proficiency in React/Next.js, Node.js, and FastAPI, complemented by extensive experience with both SQL (PostgreSQL) and NoSQL (MongoDB) databases. I’ve delivered blockchain-enabled gaming features using Web3.js (including wallet connections, NFT-based assets, and latency reduction), and I’ve also converted wireframes into production-ready landing pages with strong mobile performance and QA discipline; in earlier roles, I built responsive React/Tailwind interfaces, improved code reuse, and supported agile delivery.

Experience

Work history, roles, and key accomplishments

Web3 Game Developer

Web3 Game Development Company

Jan 2024 - Feb 2026 (2 years 1 month)

Developed blockchain-based gaming features using Web3.js, integrating wallet authentication and secure in-game transactions with Ethereum-compatible smart contracts. Built real-time React frontends with NFT-based assets and optimized blockchain transaction performance to reduce latency.

Smart Contracts React Performance Optimization Web3.js

Back-end and Full-stack Developer

Akveo

Jan 2021 - Apr 2022 (1 year 3 months)

Converted a static wireframe into a fully interactive, production-ready landing page using React.js and minimal JavaScript. Implemented responsive mobile layouts, performed cross-device testing, and improved load times and responsiveness.

React JavaScript Responsive Web Design Landing Pages UI Development Quality Assurance

Front-end Developer

Developer Bazaar Technologies

Jul 2018 - May 2021 (2 years 10 months)

Built responsive, user-friendly interfaces with React.js and Tailwind CSS to enhance web application UX. Developed reusable component libraries, reduced development time by 100%, and participated in code reviews and agile sprint activities.

React Tailwind Responsive Web Applications Component Libraries Code Review Agile Scrum