Web development
Fast, modern, built to last
Custom Laravel, Vue, and React websites built for real-world performance, scalability, and maintainability—with clean code, reliable backends, and easy deployment.
About Freelancer App Developer
Discover my experience, skills, and approach to building high-quality mobile applications. As a professional mobile app developer ready for hire, I help businesses, startups, and individuals turn their ideas into reliable, modern, and user-friendly apps. Explore my background, expertise, and previous work to see how I can help bring your next app project to life.
- Years shipping
- 4+
- Apps in stores
- 5+
- Countries served
- Wordwide
- Reply time
- 24h
About Expert App Developer Freelancer
I'm Zakaria, an app developer freelancer
Hi, I'm Zakaria — a freelance app developer for hire. If you searched for an expert app developer for hire, or you simply want to hire an app developer who ships iOS, Android and web apps that actually work, this is who you would be working with. I help founders, agencies and product teams turn an idea into a live app, with four years of shipping production code and working remotely with clients in the UK, US and France.
I share notes on what I'm building, what I've learned from real client projects, and the tools that earn a place in the stack of an app developer for hire. Honest writing for people who ship software, and for anyone still deciding whether to hire an app developer for their own idea.
The blog exists because most of what I needed to learn was never written down anywhere. What a realistic budget looks like, why an app store rejection is usually a two-line fix, which parts of a project quietly eat a month. I write those down as they happen, while the details are still uncomfortable and specific.
- Android
- iOS
- Laravel
- UI / UX
- DevOps
- Writing
- Compose
Six commitments I hold myself
How I work as App developer Freelancer
None of these are unusual, but very few developers put them in writing before the first invoice. These are the ones you can hold me to on any project, on any budget, from the first call through to the handover.
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Scope in writing before any code
Every project starts with a written scope: every screen, every flow, what is explicitly out of the first release, and what happens to the timeline if you change your mind halfway through. It is the least glamorous document I produce and the one that saves both of us weeks of polite disagreement later. You approve it before I open an editor, and when something new comes up mid-build we price it openly instead of pretending it was always included.
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A working build every single week
You get something you can install on your own phone and tap, not a status email saying things are progressing nicely. Seeing the real thing every week is the only reliable way to catch a misunderstanding while it still costs an afternoon to fix. And if a week produced nothing you can see, I tell you that plainly and explain what ate the time rather than dressing it up as invisible progress.
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You own everything at the end
Source code, git history, signing keys, store listings, design files, documentation and every account created for the project get transferred into your name on launch day. There is no hosting I control, no license that expires, and no small change that has to wait for my calendar to clear. If you want to hire someone else next year, they can pick it up without a single call to me.
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Tested on real devices, not simulators
Simulators are comfortable and they lie. I test on physical phones, on older Android versions, on small screens and on deliberately bad connections, because the device your users actually own is almost never the shiny one in the demo video. That is where you find the button sitting under the keyboard, the list that stutters on real data, and the screen that breaks the moment the network drops.
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Plain language instead of jargon
You should never need a translator to understand your own project. Every trade-off gets explained in terms you can actually decide on: what it costs, how long it adds, and what breaks later if we skip it. That includes telling you when the expensive, technically interesting option is not worth it for your product, which is usually the most valuable sentence in the whole conversation.
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One developer, from first call to launch
The person you speak to on the first call is the person writing the code, testing the builds and pressing submit on the store. Nothing gets quietly handed to a junior you have never met once the contract is signed, and nothing gets lost in a translation between a salesperson and a delivery team. It also means I take a small number of projects at a time, so yours is never the one being squeezed in.
The short version
How I got here
No bootcamp story and no overnight success. Just a slow, stubborn line of shipped projects, each one teaching me something the previous one got wrong.
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2021
Starting Specialized Technician Diploma in Full-Stack Web Development
starting professional training in full-stack web development, covering frontend and backend development, databases, web application architecture, APIs, and software development practices.
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2022
Specialized Technician Diploma in Full-Stack Web Development — OFPPT
Completed professional training in full-stack web development, covering frontend and backend development, databases, web application architecture, APIs, and software development practices.
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2023
Starting Freelancing on Fiverr
Started my freelance career on Fiverr as an Android and mobile app developer. I worked with international clients on different app development projects, building experience in Kotlin, Java, Jetpack Compose, and cross-platform development. I received 21 five-star reviews, with clients praising my communication, professionalism, quality of work, and ability to deliver beyond expectations. Several clients became repeat customers, helping me build a strong portfolio and establish myself as a reliable freelance developer.
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2026
Where things stand now
I take on a small number of projects at a time so each one gets real attention, and I write the rest of it down here. Everything on this blog comes out of client work I actually did, including the parts that went sideways.
What I offer
What I can build for you
From the first sketch to the store listing — design, code and infrastructure handled by one person, so nothing falls through the gap between two agencies. This is what you actually get when you hire an app developer or bring on an Android app developer for hire instead of a team of strangers.
See every service in detailMobile app development
One codebase, two stores
iOS and Android apps built with Kotlin, Swift, or Flutter, including offline support, background sync, notifications, payments, and app store submission.
UI / UX design
Interfaces people enjoy using
Clean, accessible interfaces designed around real user flows, with wireframes, interactive prototypes, edge cases, and pixel-accurate implementation.
Cloud and DevOps
Ship faster, sleep better
CI/CD, Docker, automated backups, monitoring, and cloud infrastructure with reliable deployments, alerts, recovery options, and clear documentation.
AI Integration
Be found by the right people
Integrate AI-powered features into your applications to automate tasks, enhance user experiences, and deliver smarter solutions.
Maintenance and support
Ongoing care after launch
Ongoing bug fixes, security updates, OS upgrades, dependency updates, and feature improvements to keep your apps reliable and up to date.
In their words
What clients say afterwards
The most useful review is the one written after the invoice is paid and the app has been live for a few months. These are from people who stayed.
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Figma design in line with the project specifications. Vision well understood, I'm looking forward to finalising the development.
Ali_ruwaymFrance
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Zakaria was helpful and mindful of the deadline I needed to make to make the necessary changes and tweaks to my application. He has decided to help me again on some further changes. Cant wait to work with him again!
RohanbHong Kong
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Escribiré esta review en español para poder expresarme mejor. Si buscas a un desarrollador que te comprenda y haga lo que estás buscando, es para ti. Un hombre con mucha paciencia y atención a los detalles. Sabe lo que hace, fue un placer y muy divertido trabajar con él. Recomendado.
GeralivesChile
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This is my third project with Zakaria. If you have any ideas for an app, do consider messaging him, he can break down the steps for you. I intend to work with Zakaria on another project so that shows I definitely recommend him. Very professional, extremely hard working and goes way beyond.
ChrisUnited Kingdom
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Zakaria was extremely helpful, especially as my own knowledge at development level was limited. He was proactive and very patient, going over and above expectations. I would recommend him and I would be happy to work with him again.😊👍🏼
HeresUnited Kingdom
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I thank the generous developer who developed the my app in a professional manner and provided a wonderful job. I encourage others to work with him.
ActivemeUnited Arab Emirates
Ready to hire an app developer for your project?
Whether you want to start a build, hire an Android app developer for a specific feature, pitch a story for the blog, or just ask whether an idea is realistic before spending money on it — my inbox is open and I read every message personally.
Contact meQuestions
Frequently asked questions
The things people ask on the first call, answered here so you do not have to book one to find out.
Do you work with international clients?
Most of my clients are in Europe and North America. I keep a few hours of overlap with both time zones, run calls in English or French, and invoice in euros or dollars. Where you are based has never been the hard part; being clear about who decides what is.
Do you take on existing projects, or only new builds?
Both. Roughly half the work I do is picking up a codebase someone else started. I begin with a short paid audit so you get an honest read on what is salvageable before committing to anything larger — sometimes the answer is that a rewrite is cheaper, and I would rather say so in week one than month three.
How do you charge?
Fixed price for a defined scope, or a monthly rate for ongoing work. You get the number before anything starts, and it does not move unless the scope does — in which case you approve the change in writing first. There are no hourly surprises at the end of a month.
Who owns the code and the accounts?
You do, from the first commit. The repository, the signing keys, the store listings and the server accounts are all in your name. Nothing is hosted on my infrastructure unless you specifically ask for it, and there is no lock-in that makes leaving expensive.
What happens after launch?
Every build ships with 30 days of bug fixing included, because the first month is when real users find the things testing missed. After that you can take out a monthly retainer for updates and OS upgrades, or take it in-house with the documentation and a walkthrough. Both are normal.
How many projects do you run at once?
Two, occasionally three if one is in a quiet maintenance phase. That is the whole reason the timelines hold. It also means there is usually a wait of a few weeks before a new project can start — worth asking about early if you have a fixed deadline.