Senior Java Microservices Engineer for POS Systems

LEONARDO PACHECO GÓMEZ

PROFESSIONAL SUMMARY

Accomplished Senior Software Engineer with over 15 years of experience in full-stack development, specializing in Java, Spring Boot, and robust database management (MySQL, Sybase). Proven track record of architecting and scaling mission-critical Point of Sale (POS) systems and complex enterprise applications within large-scale retail and utility sectors. Expert in modernizing legacy systems, implementing microservices architectures, and driving technical excellence through high-performance, maintainable code.

CORE TECHNICAL SKILLS

Languages: Java (8/11/17+), Delphi, SQL, JavaScript, HTML5, CSS3 Frameworks & Tools: Spring Boot, Spring Cloud, OpenFeign, RxJava, Vue3, Hibernate/JPA Databases & Middleware: MySQL, Sybase, Oracle, PostgreSQL, Redis, RabbitMQ DevOps & Cloud: Git, Docker, Maven, Jenkins, AWS Fundamentals, Microservices Architecture PROFESSIONAL EXPERIENCE

Tiendas 3B Dec 2023 – Present

Senior Software Engineer

Architecting and spearheading the modernization of a high-volume Point of Sale (POS) system serving thousands of retail locations daily.

Implementing Spring Boot microservices and utilizing OpenFeign for seamless RESTful API communication, improving system modularity and scalability. Optimizing complex SQL queries in Sybase and MySQL, resulting in a measurable reduction in transaction latency and improved checkout processing speed. Designing reactive programming modules using RxJava to handle asynchronous data streams, ensuring high availability during peak traffic periods. Agua de Mexico Nov 2011 – Present

Senior Software Engineer

Managing the full-lifecycle development of enterprise-level utility management software, supporting large-scale billing and customer operations for over a decade. Engineered robust backend solutions that automated data reconciliation processes, increasing departmental efficiency and reducing manual entry errors by an estimated 30%. Maintaining and upgrading legacy infrastructure, successfully transitioning core components to modern frameworks without service disruption.

Universidad ICEL Feb 2008 – Sep 2011

Project Lead Developer

Led a cross-functional development team in creating a centralized educational management platform for student enrollment and academic tracking.

Designed the core database schema and application architecture, ensuring data integrity and security for thousands of student records.

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Mexico City, Mexico ***.*******.******@*******.*** +52-53-624*-**** linkedin.com/in/leonardo-pacheco-gomez-developer Mentored junior developers on coding standards and best practices, fostering a culture of continuous technical improvement.

ANDANAC Mar 2007 – Jan 2008

Software Developer

Developed customized modules for automotive dealership management software, focusing on inventory control and sales reporting.

Collaborated with stakeholders to gather requirements and translate business needs into technical specifications.

EDUCATION

National Autonomous University of Mexico (UNAM) 2001 – 2007 Software Engineering (Bachelor of Engineering)

ADDITIONAL STRENGTHS

Full-Stack Versatility: Strong bridge between legacy systems (Delphi) and modern frontend/ backend stacks (Vue3/Java).

Strategic Leadership: Experienced in leading projects through the entire Software Development Life Cycle (SDLC) from ideation to deployment.

Continuous Learner: Self-taught expert in emerging technologies with a passion for architectural patterns and system optimization.

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