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Abdel Karim Khouiyi

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Senior Full Stack & Mobile Developer

Hi, I'm Karim. I am a Senior Developer who loves turning complex ideas into scalable, production-ready software. Over the past decade, my passion has been building high-performance web and mobile products from scratch—from clean backend architectures to polished user interfaces. I enjoy automation, clean code, and creating seamless digital experiences.

Frankfurt am Main, Germanykarimkhouyi@gmail.com+49 1523-6604061
01

Experience

Full-Stack Engineer & Tech Consultant

2024 — Present

Freelance

  • Managed end-to-end product lifecycles, translating business goals into robust technical requirements and production-ready software.
  • Architected complex, multi-tenant and multi-language backend ecosystems from scratch using native PHP and MySQL for international projects.
  • Handled full-stack development, server infrastructure provisioning, database optimization, and critical production incident response.
  • Conducted comprehensive system audits and legacy code refactorings to dramatically improve system scalability and performance.

Full Stack Programmer & Mobile Developer

2018 — 2024

Wicombit

  • Led the development, architecture, and evolutionary maintenance of corporate and commercial web and mobile applications.
  • Created and maintained SaaS platforms, optimizing infrastructure for dynamic and multi-user environments.
  • Implemented modern, high-performance frontends with React.js and Next.js, plus fluid mobile solutions via React Native, Ionic, and Expo.io.
  • Modeled and managed advanced relational and non-relational databases using MySQL, MongoDB, and GraphQL.
  • Deployed advanced integrations with Stripe and PayPal to automate subscriptions, recurring payments, and marketplace transactions.
  • Used Headless CMS platforms for dynamic, decoupled, and highly scalable content management.

Full Stack Programmer

2013 — 2017

Campo de Marte

  • Developed complex backend systems using native PHP, designing multi-user and multi-language architectures from scratch for large-scale international projects.
  • Built comprehensive web applications and custom technological solutions using PHP, JavaScript, and MySQL.
  • Conducted deep server performance optimization, legacy code refactoring, and database query tuning to enhance scalability.
  • Participated in system architecture design, code audits, and the resolution of critical production incidents.
02

Technical Skills

Front-End & Mobile

React.jsNext.jsReact NativeJavaScript (ES6+)TypeScriptIonicExpo.io

Back-End & CMS

Node.jsNative PHPExpress.jsStrapiREST APIs

Databases

MongoDBMySQLGraphQLPostgreSQL

Services & Cloud

AWSWasabiGit / GitHub

Specialties

SaaS ArchitectureMulti-language SystemsMulti-user PlatformsCross-platform Mobile
03

Projects

Gymbly.io preview

Gymbly.io

2025

Designed and deployed a production-ready React Native application for iOS and Android using a single codebase, integrating push notifications, in-app-purchases, and native-like performance

React NativeExpo.ioPhp
Gadgetza preview

Gadgetza

2024

Developed a lightweight, monolithic web application SaaS using pure PHP (OOP) and MySQL, implementing a custom MVC pattern to ensure clean separation of concerns without framework overhead.

jQueryPHPMySQL
FitPro preview

FitPro

2024

Engineered an end-to-end mobile ecosystem featuring cross-platform iOS/Android apps built with React Native and a secure Node.js microservice.

React NativeExpo.io
Evora preview

Evora

2022

Engineered both front-end templates and back-end logic natively using pure PHP, eliminating dependency fatigue and ensuring a zero-build-step deployment.

jQueryPHPMySQL
04

Education & Languages

Education

Higher Technical Degree in Computer Science

Academia Jardin CETA CAJ

2010

Continuous Education / Certifications

Udemy & Coursera

2013 — Present

Languages

SpanishNative
ArabicNative
EnglishProfessional Working
FrenchIntermediate