🚀 Transforming Complex Business Challenges Into Scalable Digital Solutions I'm a Senior Full Stack & Cloud Data Engineer with 5+ years of proven expertise helping businesses unlock growth through innovative technology solutions. Currently architecting enterprise platforms that serve 50+ retail clients while processing 10M+ records daily with 99.9% accuracy. What Sets Me Apart: ✅ Multi-Domain Mastery: Seamlessly combining full-stack development, data engineering, cloud architecture, and emerging technologies like blockchain and AI ✅ Enterprise Scale Impact: My solutions have driven 60% efficiency improvements, 25% cost reductions, and millions in revenue growth ✅ Global Remote Leadership: Successfully led international teams and delivered projects across multiple time zones ✅ Innovation Driver: Early adopter of cutting-edge technologies, from Web3 integration to advanced 3D visualizations Recent Achievements: 🎯 Architected pricing optimization platform reducing client onboarding time by 60% for major French retailers (Intermarché, Mr. Bricolage, Feu Vert) 🎯 Built NFT marketplace with advanced 3D visualization serving thousands of users and generating $150K+ in transaction volume 🎯 Engineered ETL pipelines processing millions of product records daily across multi-cloud environments (GCP, Azure) 🎯 Led development team creating e-tourism platform that improved booking efficiency by 40% and customer satisfaction by 25% My Technical Expertise: • Languages: Java 17, Python, JavaScript/TypeScript, SQL, Solidity • Frontend: React 18, Next.js 14, Angular, React Native, Three.js • Backend: Spring Boot, Node.js, Express.js, Microservices Architecture • Cloud & DevOps: GCP, AWS, Azure, Kubernetes, Docker, CI/CD • Data Engineering: BigQuery, ETL Pipelines, Apache Spark, Machine Learning • Emerging Tech: Blockchain, Web3, Smart Contracts, AI Integration Industries I've Transformed: Retail & E-commerce | FinTech | Healthcare | Gaming & Entertainment | SaaS Platforms I'm passionate about mentoring junior developers, contributing to open-source projects, and staying at the forefront of technological innovation. Whether you're a startup looking to scale or an enterprise seeking digital transformation, I bring the technical depth and business acumen to turn your vision into reality. Let's connect if you're interested in discussing technology innovation, remote collaboration opportunities, or how data-driven solutions can accelerate your business growth.

Jday Firas

🚀 Transforming Complex Business Challenges Into Scalable Digital Solutions I'm a Senior Full Stack & Cloud Data Engineer with 5+ years of proven expertise helping businesses unlock growth through innovative technology solutions. Currently architecting enterprise platforms that serve 50+ retail clients while processing 10M+ records daily with 99.9% accuracy. What Sets Me Apart: ✅ Multi-Domain Mastery: Seamlessly combining full-stack development, data engineering, cloud architecture, and emerging technologies like blockchain and AI ✅ Enterprise Scale Impact: My solutions have driven 60% efficiency improvements, 25% cost reductions, and millions in revenue growth ✅ Global Remote Leadership: Successfully led international teams and delivered projects across multiple time zones ✅ Innovation Driver: Early adopter of cutting-edge technologies, from Web3 integration to advanced 3D visualizations Recent Achievements: 🎯 Architected pricing optimization platform reducing client onboarding time by 60% for major French retailers (Intermarché, Mr. Bricolage, Feu Vert) 🎯 Built NFT marketplace with advanced 3D visualization serving thousands of users and generating $150K+ in transaction volume 🎯 Engineered ETL pipelines processing millions of product records daily across multi-cloud environments (GCP, Azure) 🎯 Led development team creating e-tourism platform that improved booking efficiency by 40% and customer satisfaction by 25% My Technical Expertise: • Languages: Java 17, Python, JavaScript/TypeScript, SQL, Solidity • Frontend: React 18, Next.js 14, Angular, React Native, Three.js • Backend: Spring Boot, Node.js, Express.js, Microservices Architecture • Cloud & DevOps: GCP, AWS, Azure, Kubernetes, Docker, CI/CD • Data Engineering: BigQuery, ETL Pipelines, Apache Spark, Machine Learning • Emerging Tech: Blockchain, Web3, Smart Contracts, AI Integration Industries I've Transformed: Retail & E-commerce | FinTech | Healthcare | Gaming & Entertainment | SaaS Platforms I'm passionate about mentoring junior developers, contributing to open-source projects, and staying at the forefront of technological innovation. Whether you're a startup looking to scale or an enterprise seeking digital transformation, I bring the technical depth and business acumen to turn your vision into reality. Let's connect if you're interested in discussing technology innovation, remote collaboration opportunities, or how data-driven solutions can accelerate your business growth.

Available to hire

🚀 Transforming Complex Business Challenges Into Scalable Digital Solutions

I’m a Senior Full Stack & Cloud Data Engineer with 5+ years of proven expertise helping businesses unlock growth through innovative technology solutions. Currently architecting enterprise platforms that serve 50+ retail clients while processing 10M+ records daily with 99.9% accuracy.

What Sets Me Apart:
✅ Multi-Domain Mastery: Seamlessly combining full-stack development, data engineering, cloud architecture, and emerging technologies like blockchain and AI
✅ Enterprise Scale Impact: My solutions have driven 60% efficiency improvements, 25% cost reductions, and millions in revenue growth
✅ Global Remote Leadership: Successfully led international teams and delivered projects across multiple time zones
✅ Innovation Driver: Early adopter of cutting-edge technologies, from Web3 integration to advanced 3D visualizations

Recent Achievements:
🎯 Architected pricing optimization platform reducing client onboarding time by 60% for major French retailers (Intermarché, Mr. Bricolage, Feu Vert)
🎯 Built NFT marketplace with advanced 3D visualization serving thousands of users and generating $150K+ in transaction volume
🎯 Engineered ETL pipelines processing millions of product records daily across multi-cloud environments (GCP, Azure)
🎯 Led development team creating e-tourism platform that improved booking efficiency by 40% and customer satisfaction by 25%

My Technical Expertise:
• Languages: Java 17, Python, JavaScript/TypeScript, SQL, Solidity
• Frontend: React 18, Next.js 14, Angular, React Native, Three.js
• Backend: Spring Boot, Node.js, Express.js, Microservices Architecture
• Cloud & DevOps: GCP, AWS, Azure, Kubernetes, Docker, CI/CD
• Data Engineering: BigQuery, ETL Pipelines, Apache Spark, Machine Learning
• Emerging Tech: Blockchain, Web3, Smart Contracts, AI Integration

Industries I’ve Transformed:
Retail & E-commerce | FinTech | Healthcare | Gaming & Entertainment | SaaS Platforms

I’m passionate about mentoring junior developers, contributing to open-source projects, and staying at the forefront of technological innovation. Whether you’re a startup looking to scale or an enterprise seeking digital transformation, I bring the technical depth and business acumen to turn your vision into reality.

Let’s connect if you’re interested in discussing technology innovation, remote collaboration opportunities, or how data-driven solutions can accelerate your business growth.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Language

Arabic
Fluent
English
Advanced
French
Advanced

Work Experience

Senior Full Stack, Cloud & Data Engineer at Mercio
June 1, 2025 - Present
Architected and developed a SaaS price optimization platform for over 50 major retail clients (e.g., Intermarché, Mr. Bricolage). Designed a microservices ecosystem using Java 17 and Spring Boot, with a frontend built in React and a frontend in TypeScript. Implemented high-performance ETL pipelines on GCP and Azure, processing over 10 million records daily. Executed complex data migrations (SQL Server to PostgreSQL) using Python scripts in Jupyter Notebooks and developed advanced SQL queries in BigQuery for data cleansing and enrichment. Deployed and orchestrated on Google Kubernetes Engine (GKE) using Docker and Helm, achieving 99.99% uptime. Integrated automated testing with Cucumber (BDD) and CI/CD pipelines.
Senior JavaScript Developer & AI Expert at Cybelle Data
May 31, 2025 - September 5, 2025
Developed enterprise web applications and intelligent automation solutions. Built a conversational AI agent using OpenAI GPT models and LangChain, powered by a high-performance Python backend with FastAPI. Frontend implemented with React.js and Next.js, serving over 1,000 daily active users. Designed and published custom Google Chrome extensions and Google Workspace add-ons using Google Apps Script. Migrated legacy VBA systems to a modern cloud architecture with Node.js and Firestore, improving reliability by 85%.
Freelance Full Stack Developer at Upwork & Independent Projects
January 1, 2023 - Present
Delivered over 25 web, mobile, and blockchain projects for international clients. Web & mobile apps: 15+ web apps (React.js, Redux) and 8 cross-platform mobile apps (React Native, TypeScript) with features like Stripe payments, MapBox, OAuth2 authentication, and MQTT real-time communication. Blockchain/DeFi: architected an NFT marketplace and a DeFi application (Node.js, Solidity) handling significant transaction volume and asset management.
JavaScript Developer at Tanitlab AI
October 31, 2024 - September 5, 2025
Designed scalable backend systems with Node.js, Express.js, and PostgreSQL on Google App Engine. Developed automation scripts and Google Workspace add-ons via Apps Script. Built an automated document generation system for BigQuery using Node.js and YAML configurations.
Full Stack Developer & Team Leader at BoosterBC
June 30, 2023 - September 5, 2025
Led a team of 5 engineers to deliver a comprehensive e-tourism platform using the MERN stack (MongoDB, Express.js, React, Node.js). Improved booking efficiency by 40% through UX and backend process optimization.

Education

Bachelor of Computer Science at Higher Institute of Technological Studies of Nabeul
December 1, 2018 - June 30, 2022

Qualifications

JavaScript (Basic, Intermediate) – HackerRank
January 11, 2030 - September 5, 2025
JavaScript Specialist – CodinGame
January 11, 2030 - September 5, 2025
Node.js (Basic, Intermediate) – HackerRank
January 11, 2030 - September 5, 2025
REST API (Intermediate) – HackerRank
January 11, 2030 - September 5, 2025
Problem Solving (Basic, Intermediate) – HackerRank
January 11, 2030 - September 5, 2025

Industry Experience

Professional Services, Real Estate & Construction, Software & Internet, Travel & Hospitality, Media & Entertainment, Retail