Oualid Moussaid

🚀 Technical Referent | Java Fullstack Engineer | Payment Orchestration Specialist

I can support your fintech, e-commerce, or high-scale backend projects.

With 4 years of experience as a technical referent developer at Purse —a French fintech specialized in payment orchestration—I’ve worked at the core of scalable, secure, and high-performance payment solutions used by major European retailers.

As a Java engineer with 5 years of experience overall, I specialize in building and maintaining robust, enterprise-grade applications using the Spring reactive ecosystem (Spring Webflux). At Purse, I contributed to mission-critical systems handling high-availability transactions and ensured seamless integration with more than 40 PSPs including Aci, WorldLine, Adyen, Stripe, PayPal, and BNPL providers.

🔒 Security and performance have been central to my work, particularly in the context of online payments where data integrity, fraud prevention, and compliance are non-negotiable.

🛠️ Key areas of expertise:

I can Design and implement REST APIs with Spring Boot

I can integrate payment providers

I can move Legacy project to modern Spring frameworks

I can Do advanced JSON/CSV mapping for reporting and reconciliation

I can handle Kubernetes & Docker for containerized deployments

I can write Unit and integration testing to ensure stability in complex transaction flows

Throughout my time at Purse, I’ve tackled end-to-end product development, continuous platform evolution, and proactive maintenance—contributing to Purse’s rise as a key player in the European payment ecosystem.

📩 I’m open to new challenges! Don’t hesitate to reach out if you need a dedicated engineer to support your fintech, e-commerce, or high-scale backend projects.