Mateo Baranji

Senior Backend Engineer

Globant

Sep 2023 - Feb 2026 (2 years 6 months)

• Designed and maintained 30+ microservices using Java 17, Spring Boot, and Spring Cloud in a distributed cloud-native architecture. • Improved system scalability to support 200,000+ daily active users by implementing Kubernetes-based horizontal scaling on AWS. • Reduced average API latency by 38% through optimization of service layers, database queries, and Redis caching strategies. • Increased system reliability to 99.97% uptime by introducing circuit breakers, retry mechanisms, and improved fault tolerance patterns. • Handled peak loads of 12,000+ requests per second using RocketMQ for asynchronous processing and load balancing. • Reduced database load by 50% by redesigning MySQL schema, adding indexing strategies, and introducing cachin

Senior DevOps Engineer

Capgemini

Jul 2020 - Aug 2023 (3 years 2 months)

• Designed and managed cloud infrastructure on AWS, supporting 50+ microservices across Kubernetes clusters with high availability. • Improved deployment frequency from 2 releases/week to 20+ releases/week by implementing fully automated CI/CD pipelines using Jenkins and ArgoCD. • Reduced production downtime by 65% by introducing centralized monitoring and alerting using Prometheus, Grafana, and AWS CloudWatch. • Optimized Kubernetes cluster performance, reducing infrastructure costs by 30% through autoscaling and resource tuning. • Built and maintained Docker-based containerization strategy, standardizing deployments across 15+ development teams. • Implemented centralized logging and tracing using Loki and Tempo, reducing incident root- ca

Tech Lead / Node.js Full Stack Developer

Endava

Jul 2017 - Jun 2020 (3 years)

• Led a cross-functional engineering team of 6-10 developers, delivering scalable backend systems across microservices architecture using Java 17 and Spring Boot. • Defined and owned system architecture decisions for 40+ microservices, ensuring scalability, security, and maintainability across distributed systems. • Improved overall system performance by 45% by driving backend optimization, caching strategy redesign (Redis), and database query tuning (MySQL). • Increased team delivery velocity by 35% by introducing Agile best practices, sprint refinement structure, and improved backlog management. • Reduced production incidents by 60% through improved CI/CD pipelines, automated testing, and stricter code review standards. • Led migration fr

Backend Developer

Thoughtworks

Oct 2014 - May 2017 (2 years 8 months)

• Developed and maintained 25+ RESTful APIs using Java 17, Spring Boot, and Spring Cloud in a microservices architecture. • Improved API performance by 40% by optimizing service logic, reducing unnecessary database calls, and implementing Redis caching. • Supported backend systems handling 100,000+ daily active users with high availability and fault- tolerant design. • Reduced database query time by 50% through MySQL indexing, query optimization, and schema redesign. • Built asynchronous processing pipelines using RocketMQ, improving system throughput by 35%. • Participated in designing and deploying 15+ microservices in a Kubernetes-based AWS environment. • Improved system reliability to 99.9% uptime by implementing retry mechanisms, circu

Junior Backend Developer

EPAM Systems

Jun 2013 - Aug 2014 (1 year 3 months)

• Assisted in developing RESTful APIs using Java and Spring Boot under senior developer guidance. • Built and maintained 10+ backend endpoints for core application features such as user management and data processing. • Fixed bugs and improved existing services, reducing reported issues by 25% in production. • Worked with MySQL databases, writing queries and improving data retrieval performance by 15%. • Participated in Agile Scrum team, contributing to 2-week sprint cycles and daily stand-ups. • Supported integration of Redis caching, improving response time for frequently used endpoints by 20%. • Collaborated with QA and frontend teams to deliver 50+ production-tested features. • Learned and applied microservices architecture principles i

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