Walid Rahali

💼 Senior Developer | Java • SaaS • ML Expert

🚀 16+ Years Experience | Reliable, Scalable, Results-Driven

Hi, I’m Walid — a full-stack developer and software architect with a deep focus on Enterprise Java, Modern SaaS Platforms, and AI-driven solutions. I bring not just code, but clarity, structure, and long-term value to every project.

🔧 Enterprise Application Development (Java, Spring, REST)

I specialize in building robust, high-performance enterprise systems using:

- Java EE, Spring Boot, REST APIs, JPA, Hibernate

- Oracle, MySQL, PostgreSQL

- Scalable architecture: microservices, distributed systems, JBoss, Kafka, RabbitMQ

From monolithic refactors to full microservices orchestration, I’ve led backend systems in production with millions of users.

🛠 SaaS Development (React, Next.js, Shopify Remix)

I build modern SaaS tools and e-commerce integrations using:

- React, Next.js, Remix, TypeScript, Tailwind

- Embedded Shopify apps (Polaris UI, App Proxies, GraphQL/REST API)

- Payment systems & external APIs (Stripe, PayPal, Amazon, Airwallex, etc.)

- From MVPs to full-featured merchant dashboards — I deliver end-to-end systems.

📊 Machine Learning & Forecasting (Python, scikit-learn, Prophet)

With practical ML experience in business contexts, I deliver:

- Forecasting (Prophet, ARIMA, Exponential Smoothing)

- Classification & Detection Models (scikit-learn, XGBoost)

- ETL & data workflows (Pandas, NumPy, Jupyter)

I focus on actionable insights — from fraud detection to sales prediction.

☁️ Cloud Deployment & DevOps (Docker, AWS, GCP, DigitalOcean)

I streamline deployment and scalability with modern DevOps tools:

- Containerization & orchestration: Docker, Docker Compose

- CI/CD pipelines and staging setup

- Cloud hosting & scaling on AWS (EC2, RDS), Google Cloud, DigitalOcean, Linode

- Domain/DNS, SSL, backups, and server hardening

Your app doesn’t just work — it scales reliably in production.