Firas Jday
Senior Full Stack & Cloud Data Engineer
About Me
Results-driven Senior Full Stack & Cloud Data Engineer with 5+ years of expertise in designing and implementing scalable, enterprise-grade solutions. Proven track record of delivering data-driven platforms serving 50+ clients and processing 10M+ records daily. Specialized in microservices architecture, cloud-native development, and advanced analytics with demonstrable business impact including 60% efficiency improvements and 25% cost reductions.
Professional Focus
Architecting enterprise-grade microservices with Java 17 and Spring Boot
Building scalable data pipelines processing millions of records daily
Implementing cloud-native solutions on GCP, AWS, and Azure
Developing modern web applications with React 18 and Next.js 14
Languages
Experience
Software Engineer
Leading development of enterprise-grade pricing optimization platform serving 50+ retail clients including major French retailers (Intermarché, Mr. Bricolage, Feu Vert, Monoprix).
Key Achievements
- Architected microservices ecosystem with Java 17 & Spring Boot
- Developed configurable pricing rules engine supporting dynamic business logic, competitive pricing analysis, and automated price optimization for multi-channel retail operations
- Deployed containerized applications on Google Kubernetes Engine (GKE) using Helm charts and Docker
- Automated real-time data synchronization workflows using Google Cloud Functions and Dataform, achieving 99.9% data accuracy between BigQuery data warehouse and PostgreSQL operational databases
- Developed advanced analytics algorithms for pricing elasticity computation, competitor product matching, and automated data quality validation using Python, SQL, and Jupyter Notebooks
- Engineered ETL pipelines processing 10M+ retail records daily across GCP and Azure
Technologies & Skills
Senior JavaScript Developer & AI Expert
Developed enterprise web applications and AI solutions serving 1000+ daily active users with focus on automation and intelligent systems.
Key Achievements
- Built enterprise web apps with React.js, Next.js serving 1000+ daily users
- Automated workflows with Google Apps Script, improving efficiency by 50%
- Migrated legacy VBA systems to Node.js/Firestore, improving reliability by 85%
- Engineered conversational AI agent with OpenAI GPT & LangChain (90% satisfaction)
- Architected FastAPI backend supporting 10,000+ concurrent requests
Technologies & Skills
Freelance Full Stack Developer
Delivering modern web and mobile applications with focus on blockchain, DeFi, and enterprise solutions for global clients.
Key Achievements
- Delivered 15+ web applications with React.js and modern UI frameworks
- Developed 8+ cross-platform mobile apps with React Native (4.5+ app store ratings)
- Built Banana NFT Platform generating $50K+ transaction volume
- Created XStake DeFi Platform managing $100K+ in staked assets
- Reduced app crash rates by 75% through performance optimization
Technologies & Skills
JavaScript Developer
Specialized in AI automation solutions and scalable backend systems with focus on Google Cloud Platform integration.
Key Achievements
- Automated business workflows with Google Apps Script (35% efficiency improvement)
- Deployed Node.js/PostgreSQL systems on Google App Engine (5,000+ daily requests)
- Developed automated BigQuery documentation system (80% time reduction)
- Reduced manual errors by 90% through intelligent automation
Technologies & Skills
Full Stack Developer & Team Leader
Led cross-functional team developing comprehensive e-tourism platform with focus on user experience and operational efficiency.
Key Achievements
- Led team of 5 engineers delivering MongoDB/Node.js e-tourism platform
- Achieved 40% improvement in booking efficiency and 25% increase in satisfaction
- Reduced operational errors by 30% through automation initiatives
- Maintained 100% on-time delivery record using Agile methodologies
- Improved sales process efficiency by 50%
Technologies & Skills
Credentials
Professional Certifications
JavaScript (Intermediate)
HackerRank • 2023
Node.js (Intermediate)
HackerRank • 2023
Node.js (Basic)
HackerRank • 2023
JavaScript (Basic)
HackerRank • 2022
REST API (Intermediate)
HackerRank • 2023
Skills & Expertise
Technical Skills
Backend & APIs
Frontend & Mobile
Cloud Platforms
Data Engineering
DevOps & Infrastructure
Databases
Security & Auth
Testing & Quality
Blockchain & AI
Methodologies
Featured Projects
Testimonials & Recommendations
Jérémy Rochot
Data Centric Engineer
Jérémy managed FIRAS directly
Firas is a dedicated and passionate developer who becomes unstoppable once he's on a project. As a Senior Full Stack & Cloud Data Engineer specializing in Java, Spring Boot, and modern web technologies, he consistently delivers high-quality, scalable solutions. His expertise in cloud architecture and data engineering makes him invaluable for enterprise projects. I wholeheartedly recommend him for any challenging development role.
ahmed dalhoum
Financial Engineer @ Warden Labs | Top Rated Plus Blockchain developer
ahmed worked with FIRAS on the same team
Firas is one of the most talented full stack developers I've had the pleasure of working alongside. His technical skills span from Java Spring Boot microservices to React frontends, and he consistently delivered high-quality work. His deep understanding of both backend and frontend ecosystems, combined with his cloud expertise, makes him exceptional. I highly recommend him for any team seeking a top-tier full stack engineer!
Shah Fahad
React Native | Next Js
Shah worked with FIRAS on the same team
Firas is a great guy. He is a skillful developer handling complex enterprise projects, building scalable architectures and managing cloud infrastructure with expertise.
Maher Mahouachi
Freelance Expert in Google Workspace & AppSheet | Add-on Developer | Team Leader in Automation & SaaS Solutions
Maher managed FIRAS directly
I had the pleasure of working with Firas Jday on several enterprise projects, and I can confidently say that he is one of the most talented and dedicated engineers I have ever worked with. Firas is not only an expert in Java Spring Boot and cloud technologies but also an innovative full stack developer with a passion for solving complex problems with clean, efficient code. His expertise in microservices architecture and data engineering is unparalleled, and he consistently transforms business requirements into scalable, enterprise-grade solutions. Firas possesses a unique ability to break down complex technical challenges and deliver creative, well-architected solutions that truly make a difference. Whether working independently or leading a team, he approaches every task with determination, and his technical knowledge spans from backend systems to modern frontend frameworks. I highly recommend Firas for any opportunity where top-tier engineering skills and a problem-solving mindset are needed. He will undoubtedly be a valuable asset to any enterprise team or project.
Frequently Asked Questions
I specialize in enterprise-grade software development with Java 17, Spring Boot microservices, and cloud-native architectures. I've built platforms serving 50+ clients and processing 10M+ records daily, with proven experience in reducing operational costs by 25% and improving efficiency by 60%.
Yes, I have extensive experience with multi-cloud architectures across GCP, AWS, and Azure. I've engineered ETL pipelines processing millions of records daily, implemented BigQuery data warehouses, and orchestrated Kubernetes deployments with 99.99% uptime.
I design microservices using Domain-Driven Design principles with Java Spring Boot, implementing comprehensive testing with JUnit, Cucumber BDD, and Testcontainers. I focus on scalability, maintainability, and proper service boundaries with robust API design and documentation.
Absolutely. I've led cross-functional teams of 5+ engineers, maintained 100% on-time delivery records, and implemented Agile/Scrum methodologies. I have experience mentoring developers, establishing coding standards, and driving technical decision-making for enterprise projects.
Yes, I have hands-on experience with Web3 technologies, smart contract development with Solidity, and AI integration using OpenAI APIs and LangChain. I've built NFT platforms generating $50K+ in volume and conversational AI systems with 90% user satisfaction rates.
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