Hello, I'm
Hadj Hadji
Backen|
Specialized in building robust, scalable backend systems and APIs. 2+ year of experience in distributed systems and cloud architecture.
class Backend Engineer {
constructor() {
this.name = "Hadj Hadji"
this.skills = ["Node.js", "Express", "MongoDB", "Firebase"]
this.experience = +2
}
solveProblems() {
return "Efficiently"
}
}Technical Expertise
Backend Development
- Node.js
- Express.js
- RESTful APIs
Databases
- MongoDB
- Firebase
- MySQL
Cloud & DevOps
- Google Cloud
- Azure
- Serverless
- Docker
System Design
- API Design
- Scalability
- Performance
Ai
- LangGraph
- RAG & Vector Databases
- GPT & Mistral
- TTS
Documentation
- Swagger
- Markdown
About Me
Experiences
Backend Developer
ITSource One - 6 months
I worked on Langaroo, a WhatsApp-like chat application that features real-time translation for text, audio, and video calls, where I developed and maintained the backend functionalities using Google Cloud Functions. I integrated payment processing and subscription management through Stripe, employing Cloud Functions to handle payment intents and manage webhook events seamlessly. Additionally, I utilized Firestore for efficient data storage and retrieval, ensuring high performance and real-time updates for users.
Software Engineer
RMBTech Smart Automation - 6 months
I deployed a local tile server using Node.js to render offline geospatial data, enhancing accessibility and functionality. Additionally, I managed a Windows Server, overseeing virtual machine provisioning and resource allocation to optimize performance. I configured an NTP server to ensure accurate time synchronization across devices, and I successfully fixed a bug in an ElectronJS application, improving its overall stability and user experience.
Software Developer Freelancer
Fiverr - 2 years
I have developed a diverse range of software solutions, including the Masjidna app for managing masjid activities using Java, and the Setram Tramway Controller, also built in Java. Additionally, I created cafeteria management software utilizing Java and JavaFX for a user-friendly interface. My experience extends to web development with an NFT art generation application using Node.js and Express.js. Furthermore, I have designed over 20 chatbots for Telegram and WhatsApp on Fiverr, leveraging Node.js and OpenAI to enhance user engagement.
AI & Backend Engineer
Sintek.io - 11/2024-Current
Developed and launched Notaura, a SaaS platform for reading and annotating research papers. Built the backend with Node.js and Express, enabling secure PDF uploads, real-time note-taking, highlighting, and commenting features.
Education
Bachelor of Science in Computer Science
University of Oran 1 - Ahmed Ben Bella - 2021
Projects
JournalGate.io
AI-powered research paper summarization platform that transforms complex academic papers into clear, concise audio summaries across multiple disciplines
Personal Project
CoachSupport.online
Intelligent AI Chat SaaS using RAG architecture with knowledge base indexing, semantic search, AI-powered responses, book recommendations (Affiliate), and payment integration (Stripe).
Client Project
Notaura.app
Saas platform for reading, annotating, highlighting and converting research papers and PDF files
in Beta
Supermely.com
AI-powered relationship counseling platform with secure chat, session management, and psychologist dashboard, integrating WhatsApp/Telegram and OpenAI GPT. Built with Node.js and MongoDB, supporting voice/text communication and role-based access.
Not available
Langaroo.co
Serverless backend for a paid chat app with real-time translation
+100k users on Playstore, +5k users on Appstore