Mohamadreza Ehtesham

Senior Java Backend Engineer with 12+ years of experience building and maintaining large-scale enterprise systems in banking, cybersecurity, insurance, telecom, and blockchain domains.

I specialize in designing and supporting scalable backend architectures using Java and Spring Boot microservices. I have strong hands-on experience in debugging complex production issues, optimizing system performance, and improving system reliability in real-world environments.

Core expertise includes:

* Java (5+ years) enterprise backend development
* Spring Boot & Microservices architecture (2–3+ years)
* RESTful API design and integration
* Production bug fixing and system troubleshooting
* SQL and database performance tuning
* Refactoring and improving legacy systems
* Working with distributed systems and high-load environments

Additional experience:

* Graph databases (Neo4j) for relationship-heavy data models
* Elasticsearch for search optimization and indexing strategies

I focus on delivering stable, maintainable, and business-driven backend solutions with strong attention to production reliability and system scalability. I am comfortable working in remote, long-term contractual environments and collaborating with distributed teams.