Samuel Ndubi

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Backend & fintech developer based in Nairobi, Kenya. Building reliable systems and payment integrations that work.

SOFTWARE DEVELOPER

Backend & fintech developer based in Nairobi, Kenya. I build payment integrations, APIs, and scalable systems — with a focus on getting things working reliably in the real world.

Years of
Experience

GitHub
Repos

Projects
Shipped

Primary

⬡

Backend Dev

Fintech

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M-Pesa Daraja

Language

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PHP & Java

Database

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MySQL & Firebase

RECENT PROJECTS

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2 YEARS OFEXPERIENCE

Freelance — Independent Developer

Building client web applications and fintech integrations, including M-Pesa Daraja API implementations and custom PHP backends for businesses in Kenya.

2023 – Present

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Personal Projects & Open Source

Developed MindMate (Android mental health app with Firebase), and various backend tools. Maintaining 8+ public repositories on GitHub focused on practical, real-world solutions.

2022 – Present

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MY TECHSTACK

PHP

Primary Language

Java

Android & Backend

MySQL

Database

Firebase

Backend & Auth

GitHub

Version Control

M-Pesa Daraja

Payments API

DEVNOTES

Integrating M-Pesa STK Push in PHP

A walkthrough of implementing M-Pesa STK Push using the Daraja API — handling callbacks, validating transactions, and building a reliable payment flow for Kenyan businesses.

Coming soonDev write-up

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Building MindMate — A Mental Wellness App in Java

How I designed and built a mental health companion app for Android using Java, Firebase authentication, and Firestore as the real-time backend database.

Coming soonProject breakdown

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Why I Focus on Backend & Fintech

My journey into backend development and why fintech — especially mobile money integrations — is one of the most impactful areas to work in as a developer in Kenya.

Coming soonPersonal

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LET'S WORKTOGETHER