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S o f t w a r e   E n g i n e e r


Full stack | Mobile App | Game | Blockchain Developer


I’m Gary Keller, a passionate and results-driven developer specializing in the MERN stack, mobile app development, and blockchain technology with additional expertise in game development.
I build high-performance, scalable web applications using MongoDB, Express.js, React.js, and Node.js, and create intuitive mobile apps that deliver seamless user experiences across devices. In the blockchain space, I develop secure smart contracts, decentralized applications (dApps), and NFT ecosystems that empower the next generation of Web3 innovation. I also craft immersive game experiences that blend creative storytelling with technical precision. With a commitment to clean architecture, performance, and innovation, I transform bold ideas into impactful, user-centric digital solutions.



skills

skills

HTML
  95%
CSS
  95%
JavaScript
  90%
C++
  90%
C#
  90%
Python
  95%
React
Next
  90%
Vue
  90%
Svelte
  95%
TypeScript
  90%
Tailwind
  90%
Node
Express
  95%
Ruby
  90%
Laravel
  90%
Sql
  95%
NoSql
  95%
React Native
  90%
Flutter
  90%
Solidity
  95%
Ethereum
  95%
Web3.js
Web3.py
  80%
Smart Contract
  90%
Unity
  95%
Roblox
UE
  70%

SERVICES

Web  Development

Full-Stack Website Development: Building responsive, user-friendly websites tailored to client needs.
Web Performance Optimization: Improving site speed, SEO, and overall performance.
Maintenance and Support: Ongoing updates, bug fixes, and security enhancements.

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mushroom

Mobile  App   Development

Custom App Development: Building Android, iOS, and cross-platform mobile apps.
App Optimization and Debugging: Improving app performance and addressing user feedback.
MVP Development: Rapid prototyping for startups to test ideas in the market.

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Bl ockChain  Development

Custom Blockchain Solutions: Designing and developing decentralized applications (dApps) tailored to specific business models and workflows.
Smart Contract Development: Creating secure and efficient smart contracts for Ethereum and other EVM-compatible blockchains.
Tokenomics & Crypto Integration: Implementing custom tokens, crypto payments, and DeFi features to enhance user engagement and monetization.

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Ga me  Development

Unity Game Development: Creating cross-platform games with immersive gameplay, optimized performance, and engaging mechanics using Unity.
Roblox Game Creation: Designing interactive Roblox experiences with Lua scripting, monetization systems, and multiplayer features.
GTA Modding & Server Development: Developing custom GTA multiplayer experiences with RageMP, FiveM, and alt:V—featuring unique game modes, UIs, and roleplay systems.

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My Hourly Rates

Website Development

  • Front-End
  • Back-End
  • DataBase
  • API integration
$30 - $40

Mobile App Development

  • Android
  • Ios
$30 - $40

BlockChain Development

  • Smart Contracts
  • Web3 integration
$40 - $50

Game Development

  • 2D
  • 3D
$20 - $30
P r e v i o u s   W o r k s

© Last Updated On Jan 20 2025