Senior Java Backend Developer with more than 3 years of production experience on Spring Boot and MongoDB applications.
I specialize in performance optimization and the design of scalable REST APIs. Concrete result: I reduced the execution time of a critical function from 5 seconds to 60ms, a 95% improvement, thanks to an in-depth analysis of MongoDB queries and algorithmic refactoring.
My main achievements:

Design of a search engine and dynamic filtering on MongoDB, offering an expressiveness close to SQL on documentary collections
Setting up an automated MongoDB backup system with scheduling and reporting via email
N2/N3 Production Support: Debugging under pressure on critical environments
Securing APIs with Spring Security and JWT (stateless, refresh tokens)

I work in full remote, in async mode, compatible with European time zones. Payment accepted in USDT (Binance Pay or RedotPay).
Skills: Java 8/11/17 · Spring Boot · Spring Data MongoDB · MongoTemplate · REST API · Spring Security · JWT · MapStruct · Git
Available immediately for short or long-term assignments. NDA possible on request.