I build reliable, scalable backends that power real businesses in Tanzania.
Backend Engineer · API Specialist · M-Pesa & Payment Integrations
Helping Tanzanian startups and SMEs ship faster and safer.
I help Tanzanian businesses stop losing revenue to unstable payment systems and crashing servers. Specializing in production-grade M-Pesa and Mobile Money integrations, I build the 'invisible infrastructure' that ensures...
Services I Offer
Everything you need to build, scale, and maintain a solid backend — built for the Tanzanian market.
M-Pesa & Mobile Money Integration
Pain
Failed payments are costing you money and customer trust.
Solution
Accept M-Pesa and mobile money payments with confidence. We integrate payment systems into your website, app or business software, with secure transaction verification, automatic payment callbacks and reliable reconciliation. Perfect for e-commerce businesses, fintech startups, schools, SACCOs and companies that need dependable digital payments.
Custom Business Systems
Pain
Your backend is slowing growth and creating avoidable problems.
Solution
Turn manual business processes into reliable digital systems. We build custom software for managing customers, orders, inventory, shipments, payments and daily operations. From MVPs to complete business platforms, we design secure, scalable systems that help your team save time, reduce errors and work more efficiently.
API & Backend Engineering
Pain
Your API is unstable, slow, or hard for your team to maintain.
Solution
Build the reliable technology behind your website, mobile app or business platform. We develop secure APIs, design efficient databases and improve existing backend systems for performance, reliability and growth. Ideal for startups, software companies and businesses that need experienced backend engineering support.
Payment & API Security Audit
Pain
Failed payments are costing you money and customer trust.
Solution
Discover security weaknesses before they become expensive business problems. We review your APIs, authentication, payment workflows, database access and sensitive data handling. You receive a practical report showing the key risks, their severity and the steps needed to improve your system's security.
Recent Work
Real solutions built for real businesses — focused on scalability, security, and maintainability.
Scalable E-commerce Backend
Built a complete backend system handling product catalog, user authentication, order management, and real-time inventory. Integrated M-Pesa and Tigo Pesa for seamless payments. The system cu...
Fintech Payment Gateway Integration
Developed a secure backend connecting multiple mobile money providers with a lending platform. Implemented webhook handling, transaction reconciliation, and fraud detection logic to protect...
Inventory Management System Backend
Built a robust backend for a growing retail chain with multi-user access control, real-time stock updates via WebSockets, supplier management, and a reporting dashboard API.
Why Choose Me?
Not just a developer — a partner who understands your business context.
Deep Local Knowledge
I understand Tanzanian business challenges firsthand — mobile money quirks, unreliable infrastructure, and cost-effective scaling.
Clean, Documented Code
Every project I deliver is well-documented, maintainable, and easy for your team to understand and extend.
Honest Communication
Realistic timelines, transparent pricing, and no hidden surprises. If something won't work, I'll tell you upfront.
Passion for Teaching
I create tutorials and resources for other developers. Working with me means you learn — not just receive code.
What Clients Say
Real feedback from businesses I've worked with.
"Denis fixed our payment integration in 3 days. Our failed transaction rate dropped from 12% to 2%. That's real money."
Jane M.
E-commerce Founder, Dar es Salaam
"Our API was slow and crashed under load. Denis rewrote it, and now it handles 10x the traffic. His documentation is insanely clear."
Ahmed K.
Fintech Startup, Arusha
Latest Articles
Technical guides and insights focused on backend development in the Tanzanian context.
How to Integrate M-Pesa Payments into a Website in Tanzania
Learn how to integrate M-Pesa payments into a website in Tanzania, handle payment callbacks, verify transactions, and build a reliable payment experience for your customers.
September 2026
ArticleHow Tanzanian SMEs Can Fix M-Pesa Payment Errors in 2026
Step-by-step guide kwa SMEs jinsi ya kutatua failed transactions, reconciliation, na kuzuia revenue loss kwenye M-Pesa integrations.
June 2026
ArticleWhy Most Tanzanian Startups Fail at Backend Development – And How to Avoid It in 2026
Common backend mistakes, wrong tech choices, and a practical pre-launch checklist for Tanzanian startup founders and developers.
May 2026
Recommended Tools
Products and tools I recommend for shipping faster and running cleaner backend systems.
Ready to build something solid?
Let's talk about your backend needs. The first conversation is always free and pressure-free.