isaiah

Korir

Full-Stack Developer

// About Me

Crafting Digital
Experiences

Full-stack developer with 7+ years of experience creating high-performance web and mobile applications using React, React Native, and Django. I specialize in building secure MVPs for startups and enterprise-scale solutions for mid-sized companies.

Expert in designing RESTful and real-time Socket-based APIs, with a proven track record of delivering reliable, production-ready software on tight timelines. Currently working as a Mobile Engineer at Diamond Trust Bank, developing secure banking applications for 100K+ users.

7+

Years of Experience

100K+

Users Served

// Career Journey

Experience

Mobile Engineer

Diamond Trust Bank

Mar 2024 - Present

Develop and maintain secure, user-friendly mobile banking apps (iOS/Android) servicing ~100K users. Integrate backend APIs for account management, transactions, and real-time updates. Implemented performance optimizations, reducing crash rates by 99% and improving load times by 20%.

React NativeiOSAndroidFirebaseSocket.io

Software Engineer

Crowdbotics Inc

Mar 2021 - Apr 2024

Developed web and mobile apps using React and React Native, reaching thousands of active monthly users. Built RESTful and Socket-based APIs with Django and Node.js, improving data throughput. Integrated in-app subscription payments via Apple App Store and Google Play Store.

ReactReact NativeDjangoNode.jsAWS

Freelance Software Engineer

Upwork

Mar 2020 - Present

Created responsive React frontends, completing 36 client projects with a 100% satisfaction rate. Built cross-platform mobile applications with React Native (iOS/Android). Developed Node.js APIs and managed MongoDB/Postgres integrations for diverse global clients.

ReactReact NativeNode.jsMongoDBPostgreSQL
// Featured Work

Projects

DTB Mobile Banking App

Secure mobile banking application serving 100K+ users with real-time transactions, account management, and push notifications. Achieved 99% crash rate reduction and 20% improvement in load times through performance optimizations.

React NativeiOSAndroidFirebaseSocket.io

Ampath Point of Care

Healthcare management system built with Angular and Node.js, scaled to serve over 100,000 HIV patients. Refactored major code modules to improve maintainability, scalability, and performance across multiple healthcare facilities.

AngularNode.jsHapiExpressPostgreSQL

Freelance Client Projects

Completed 36 diverse client projects with 100% satisfaction rate, including responsive web applications, cross-platform mobile apps, and full-stack solutions. Built RESTful APIs and integrated various databases for global clients.

ReactReact NativeNode.jsMongoDBPostgreSQL