Back-end Systems That Just Work

At 44 App Works, I design and build backend logic that keeps sites and apps running. It’s not flashy, but it’s stable, clean, and built for real-world use.

Clients come back for updates

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Lines of backend code deployed

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Projects finished for clients

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About

Why I Build the Way I Do

I’m Lopez Mayandia Sergio, running 44 App Works. I focus on strong backend logic because it keeps businesses moving. No buzzwords, no overengineering — just clean solutions that are easy to maintain.

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How I Can Help You

I focus on building tools that work in the real world. Clean code, fast load times, and solutions you can rely on.

Back-end Development

I design solid architectures, write APIs, and set up databases that keep apps and sites running smoothly — even under pressure.

Front-end Development

I turn designs into clean, responsive interfaces that work across devices. Fast, accessible, and easy to navigate.

Over 21,000 lines written, tested, and deployed successfully

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A Few Projects I’ve Worked On

These aren’t huge flashy apps. They’re solid, useful systems that do their job.

Local Delivery App

A simple Android app for grocery delivery. Lightweight, fast, and easy to update for the client’s team.

Audio Ads Platform

Built backend logic for an audio tool that smartly inserts ads without interrupting user experience.

Ecommerce Storefront

Created a fast-loading shopping app with stable backend APIs to handle product updates during sales.

Testimonials

What Clients Say

Here’s what people I worked with had to say. Real feedback, no scripts.

Business Owner

 5/5

“Lopez Mayandia Sergio made the process so simple. The system just worked, no crashes or delays. That’s all we needed.”

Jhon William

Startup Founder