Personal details
Cristian R.
About
Senior Software Engineer focused on scalable and sustainable system design, with strong experience leading product redesigns, evolving system architecture, and improving engineering standards.
At XSELL Technologies, I contribute to building and evolving systems by introducing automated testing practices, mentoring developers, and establishing structured development processes. I work across backend and frontend, using technologies such as Java, Spring Boot, React, Kafka, and WebSockets to deliver end-to-end features aligned with product goals.
My experience includes leading product redesigns and microservices adoption, designing modular and testable systems, and improving engineering quality in growing teams. I bring strong expertise in backend development, leveraging tools like Docker, Kafka, and PostgreSQL to build reliable and maintainable solutions.
I’m a pragmatic decision-maker who aligns technical solutions with business objectives, balancing ideal architecture with real-world constraints while fostering disciplined and predictable development practices.
Work Experience
Joined a recently migrated system lacking testing practices and structured development processes.
- Elevated engineering standards by introducing automated testing practices, improving system reliability and developer confidence.
- Mentored developers and helped establish more disciplined development workflows.
- Introduced structured requirement analysis and technical design processes prior to implementation.
- Delivered end-to-end features across backend and frontend, aligned with product goals.
- Contributed to creating a more predictable and maintainable development environment.
Technologies: React, WebSockets, SSE, Docker, Java, Spring Boot, RabbitMQ, Kafka, PostgreSQL, Testcontainers
Led the redesign of a core product, defining a scalable and maintainable system architecture.
- Designed and implemented a microservices architecture with clear service boundaries.
- Applied Hexagonal Architecture to decouple domain logic from infrastructure, improving modularity and testability.
- Implemented distributed coordination patterns (Saga) to manage data consistency across services.
- Adapted architectural decisions pragmatically based on team and product maturity.
- Introduced BDD practices, aligning business requirements with automated tests and improving clarity and system evolution.
Technologies: AWS, Docker, Java, Spring Boot, Redis, MySQL, Testcontainers