Full-stack engineer — AI, payments & messaging integrations · Available for select work

Software,engineered withintention.

I'm Charles — I build web apps, mobile experiences, and the payment, messaging, and AI integrations that turn them into systems a business actually runs on.

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(01)Selected Work

Things I've
shipped.

A selection of products and systems — the customer-facing apps, and the payment, messaging, and AI plumbing that makes them work.

(02)Services

How I can help — from first line of code to the last mile of integration.

01

Product Engineering

Complete products, web and mobile, from one considered codebase — dashboards, marketplaces, internal tools. Architected to age well, not just to ship.

02

AI Automation & Agents

Systems that handle the manual work end to end — inbound leads, quoting, verification, follow-up — powered by LLMs and wired into WhatsApp, email, and the tools you already use.

03

Payments & Integration

The hard wiring most projects underestimate. M-Pesa, Paystack, Stripe, WhatsApp, third-party APIs — connected cleanly, with the compliance and audit trails that keep them trustworthy.

04

Backend & Infrastructure

APIs, data models, and infrastructure built for reliability and scale — the dependable foundation your product stands on, with the observability to see it working.

Charles Nderitu portrait
(03)About

I care about the details most people never see — because that's exactly what makes software feel right.

I've spent years working across the stack — designing databases, wrestling APIs into shape, and polishing the last pixel of a mobile screen. I like problems that span disciplines, where the interesting work is in how the pieces connect.

Whether it's a new product from scratch, an identity-verification flow, or a payments integration that has to reconcile to the cent — I bring clarity, craft, and a bias for shipping.

6+
Years building
40+
Projects shipped
Curiosity
(04)Toolkit
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(05)Contact

Let's build
something good.