const khaled = {
role: "Senior Full-Stack Engineer",
experience: "5+ years",
stack: "TS/JS",
focus: "Backend-oriented with product mindset",
passions: ["Open Source", "Tech Blogging", "System Design"],
currentlyAt: "Sakneen",
funFact: "Padel enthusiast 🎾"
};Senior full-stack engineer by day, Tech blogger and open source enthusiast by night 🌙
🏠 Senior FullStack/A.I Engineer @ Sakneen
Dec 2020 - Jun 2022, Sep 2024 - Present
Real estate SaaS platform providing end-to-end solutions for developers
- 🏗️ Architected the backend technical interview process with advanced scenarios (lost-update handling, reservation overlaps)
- 🔍 Managed Algolia search engine, building and synchronizing searchable indexes
- 📐 Designed scalable REST APIs using NestJS with MongoDB NoSQL patterns
💳 Mid FullStack Engineer @ Pleo
Aug 2022 - Aug 2024
Fintech company automating expense management for businesses
- 📈 Increased customer base by 1,500 users in 3 months via employee self-signup flow
- 🚀 Boosted vendor card adoption by 4.5% in 2 weeks
- 🎯 Owned the "features gateway" microservice, handling cross-team feature requests
- 🛠️ Designed REST APIs using Kotlin Dropwizard and Node.js Express
💼 Freelance FullStack Engineer @ Upwork
Jun 2021 - Present
| 🏆 Top Talent Badge | ✅ 100% Job Success | 📊 30+ Jobs | 🔄 60% Client Retention |
|---|
"I can't say enough things about Khaled. If you hire him, you will be very happy with his service as a freelancer. I've hired a lot of people on Upwork over the years, and no one comes close to the complete package that Khaled is. 10/10." ⭐⭐⭐⭐⭐
"He is essential to our business, we absolutely need him. When anything goes wrong on our website, he is there for us: responsive, intelligent, and able to fix all our problems. If you hire Khaled, regardless of your task, you will not be disappointed." ⭐⭐⭐⭐⭐
"Khaled is amazing! Communicates better than anyone I've ever hired on Upwork. Is skilled and smart enough to produce exactly what I wanted, how I wanted it. I recommend him to anyone who wants a top quality developer with top tier communication skills." ⭐⭐⭐⭐⭐
Junior Back-End Engineer @ Coligo
Dec 2019 - Oct 2020
Learning management system for schools
- 🔧 REST API design and maintenance using Express.js
- 📚 Conducted technical sessions on TypeScript and SSH
| Project | Contribution | Link |
|---|---|---|
| 🍃 Mongoose | MongoDB ODM Enhancement |  |
| ⚡ Fig Autocomplete | Terminal Completion Specs |  |
| 🪟 Rectangle | Window Manager App Enhancement |  |
| Repository | Description | Link |
|---|---|---|
| 🔍 Algolia Filter Query Builder | A utility library for building Algolia search filter queries |  |
- 📝 Concurrency problem with MongoDB - Nov 2025
- 📝 Exposing a local API to the internet - Apr 2025
- 📝 Data consistency in the NoSQL world - Feb 2025
- 📝 Rust vs Node.js - Apr 2024 - 57 👏
- 📝 API Requests Mastery - Apr 2024
- 📝 MongoDB Job Queue Crisis - Jun 2024
