Hello, I'm KAS
Kolawole Abdullah Solahudeen
I am a Software Engineer with over 6 years of experience building web applications. These days I work across the stack on fintech products, from Telegram Mini Apps and KYC flows to the APIs behind them, and I have mentored the next generation of frontend developers. My core tools are TypeScript, React, Next.js, Astro and Node.js.
I can be relied on to use critical thinking to solve complex projects. During my free hours, I indulge in manga, anime, music, or geeking about emerging tech.
Let's work together to bring your vision to life! I am available for both contract and full-time remote positions.
Background
I am a fullstack engineer at Payecards, where I build fintech products on the web and inside Telegram. Until October 2025 I also mentored aspiring front-end developers through CareerConnects' specialized boot camp program.
I have had the opportunity to work on various projects, including web applications, mobile apps, and back-end systems.
I have expertise in technologies such as Javascript, Typescript, and React, and I am familiar with agile development methodologies. I enjoy working in a team environment and thrive on the challenge of delivering high-quality software on time.
As an engineer, I enjoy combining my technical knowledge with my keen eye for design to create beautiful, scalable, and efficient applications that provide engaging, pixel-perfect user experiences.
Technologies
Here are some of the various technologies I am proficient with
- Javascript
- Typescript
- ReactJs
- Redux
- NextJs
- Sass
Frontend Stack
- NodeJs
- ExpressJs
- Javascript
- Typescript
Backend Stack
- Github
- Vercel
- Netlify
CI/CD
- Jest
- VS Code
- MongoDB
- Git
- Bash
Testing, DB & Misc.
Fullstack Engineer @ Payecards
July 2025 - Present- Architected a Telegram Mini App for the fintech platform with Vite, React, TanStack Router and TypeScript, using the Telegram SDK for theme adaptation, haptic feedback and viewport handling.
- Built secure onboarding and KYC flows covering phone, email and in-browser biometric face verification with MediaPipe.
- Designed a type-safe API proxy layer with Hono and Zod, and managed client and server state with Zustand and TanStack Query.
- Migrated the monorepo from Next.js to Vite with Turborepo, cutting build times by 60%, and added multi-language (i18n) support.
- Worked with backend engineers to design the REST endpoints behind registration, verification, location services and KYC document processing.
Featured Projects
A selection of work I'm proud of