Open to opportunities

Dennis User

@dennisuser5

Message

Fullstack TypeScript developer building web and mobile apps with strong type-safety focus.

Kenya

Message

What I'm looking for

I seek roles building type-safe, scalable web and mobile products using TypeScript and modern stacks, with opportunities to mentor and influence engineering practices.

I am a passionate Fullstack TypeScript developer with 4+ years building web and mobile applications using React, Node.js, and React Native.

I have led frontend teams integrating GraphQL APIs, improved CRM conversion rates via Expo mobile work, and integrated AI functionality using Vercel’s AI SDK to automate lead and sentiment tasks.

I designed type-safe backends with Prisma and Pothos, built scalable services using Firebase and Google Cloud, and implemented CI/CD with GitHub Actions to ensure reliable deployments and high uptime.

I mentor junior developers, speak at local meetups, and focus on lean dependency trees and maintainable, type-safe code that delivers measurable product improvements.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Typescript Developer

Current

Goymarey Software Solutions

Feb 2025 - Present (1 year 4 months)

Led frontend team integrating a GraphQL API using React, TypeScript, and Apollo, delivering two CRM products and driving a 20% increase in mobile conversions; introduced Pothos and Prisma to enforce type safety and accelerate SDL creation.

TypeScript React Apollo GraphQL Prisma Pothos React Native Vercel AI SDK CI CD Mentoring

Fullstack Developer

Agricultural and Industrial Holdings

Feb 2021 - Jan 2025 (3 years 11 months)

Built React dashboards and Node.js backends to replace legacy workflows, migrating utility tracking from Excel to a dashboard (reducing erroneous readings by 90%) and achieving scalable services with ~99% uptime.

React Node Express Google Cloud Storage GitHub Actions REST)REST

Education

Degrees, certifications, and relevant coursework

ALX Africa

Certificate, Software Development

2021 - 2022

Completed a 13-month bootcamp covering C programming, Linux server basics, Python backends, and JavaScript frontends under a Mastercard-sponsored program.