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I am a Senior Backend/API Developer with 13+ years of experience building high-performance RESTful APIs and backend systems using TypeScript, Node.js, and Express.js. I design complex data models for relational and NoSQL databases, optimize performance, and implement robust security patterns for authentication, authorization, and encryption. I have a proven track record delivering mission-critical microservices and event-driven architectures with Apache Kafka, deploying containerized applications with Docker and Kubernetes on AWS and Azure, and establishing comprehensive CI/CD pipelines. I thrive in distributed teams, value clean code and maintainability, and continuously explore emerging backend technologies.…I am a Senior Backend/API Developer with 13+ years of experience building high-performance RESTful APIs and backend systems using TypeScript, Node.js, and Express.js. I design complex data models for relational and NoSQL databases, optimize performance, and implement robust security patterns for authentication, authorization, and encryption. I have a proven track record delivering mission-critical microservices and event-driven architectures with Apache Kafka, deploying containerized applications with Docker and Kubernetes on AWS and Azure, and establishing comprehensive CI/CD pipelines. I thrive in distributed teams, value clean code and maintainability, and continuously explore emerging backend technologies.

Mateus Fonseca Felix

Back-End Developer, Full Stack Developer, Web Developer, +2

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I am a Senior Backend/API Developer with 13+ years of experience building high-performance RESTful APIs and backend systems using TypeScript, Node.js, and Express.js. I design complex data models for relational and NoSQL databases, optimize performance, and implement robust security patterns for authentication, authorization, and encryption. I have a proven track record delivering mission-critical microservices and event-driven architectures with Apache Kafka, deploying containerized applications with Docker and Kubernetes on AWS and Azure, and establishing comprehensive CI/CD pipelines. I thrive in distributed teams, value clean code and maintainability, and continuously explore emerging backend technologies.…I am a Senior Backend/API Developer with 13+ years of experience building high-performance RESTful APIs and backend systems using TypeScript, Node.js, and Express.js. I design complex data models for relational and NoSQL databases, optimize performance, and implement robust security patterns for authentication, authorization, and encryption. I have a proven track record delivering mission-critical microservices and event-driven architectures with Apache Kafka, deploying containerized applications with Docker and Kubernetes on AWS and Azure, and establishing comprehensive CI/CD pipelines. I thrive in distributed teams, value clean code and maintainability, and continuously explore emerging backend technologies.

Available to hire

I am a Senior Backend/API Developer with 13+ years of experience building high-performance RESTful APIs and backend systems using TypeScript, Node.js, and Express.js. I design complex data models for relational and NoSQL databases, optimize performance, and implement robust security patterns for authentication, authorization, and encryption.

I have a proven track record delivering mission-critical microservices and event-driven architectures with Apache Kafka, deploying containerized applications with Docker and Kubernetes on AWS and Azure, and establishing comprehensive CI/CD pipelines. I thrive in distributed teams, value clean code and maintainability, and continuously explore emerging backend technologies.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Senior Backend Engineer at Avantsoft

March 1, 2021 - June 1, 2025

Architected and developed production-grade RESTful APIs using TypeScript and Node.js (Express.js) serving global enterprise clients, achieving sub-100ms response times through efficient query optimization and horizontal scaling. Designed complex data models for PostgreSQL and MongoDB, creating normalized relational structures and flexible document models with RBAC, JWT/OAuth2 security, and encryption. Implemented event-driven microservices with Apache Kafka and AWS SQS, and deployed containerized apps on AWS EKS with Terraform-based infrastructure. Established Redis caching to reduce database load and improved observability with CloudWatch.

Backend Engineer at Parafernalia Interativa

February 1, 2017 - January 1, 2021

Designed and implemented Node.js/Express.js backend services powering e-commerce platforms with 10,000+ concurrent users; built RESTful APIs for checkout, payment processing, and order management with proper versioning and error handling. Developed PostgreSQL schemas for transactional systems; integrated MongoDB for product catalog and user activity, and implemented WebSocket real-time updates and Kafka-based data pipelines. Implemented Redis caching and automated CI/CD pipelines using GitLab/Jenkins.

Software Engineer at InCuca Tech

August 1, 2013 - December 1, 2016

Led backend development of automated scheduling and billing platform; designed MySQL schemas for multi-tenant SaaS, deployed on AWS, and implemented disaster recovery and security best practices.

Junior Software Developer at Dois na Oito

April 1, 2011 - March 1, 2013

Built and maintained RESTful APIs using Node.js, Python (Django), and Java; designed PostgreSQL and MySQL schemas, implemented indexing and query optimization to improve performance; automated reporting workflows and batch jobs.