Joao Oliveira

Senior .NET Developer

Aubay/TCS Group at PostNord Group•  February 2023 - Present•  Sweden

Led the completion of a critical solution at PostNord, reducing SQL Server CPU load on Microsoft Azure by 10% and connection numbers by 10%. Elevated application server performance, achieving a 10% reduction in memory usage and a 75% decrease in CPU load on Red Hat OpenShift. Managed the implementation of a data posting solution for Avro Schema data to Kafka clusters, ensuring robust validation and processing. Streamlined the data pipeline, reducing processing time by 13% and enabling real-time analytics, emphasizing teamwork and collaboration. Designed and deployed a standardized logging framework across 10 projects, ensuring log formatting consistency, and export alignment with Grafana Loki’s time-series requirements using Serilog.

Senior .NET Developer

CRECISP•  June 2018 - January 2023•  São Paulo/Brazil

Directed the implementation of OAuth standards across 3 key projects, significantly improving data protection and security, leading to reduction in security breaches. Engineered Docker and NGINX integration to streamline microservices deployment, achieving a 40% reduction in server downtime. Reinforced team efficiency and code quality by mentoring and guiding 8 new employees in adapting to company standards. Applied Domain-driven design and SOLID principles to 2 complex projects, enhancing system architecture and maintainability, leading to easier scalability, reduced bugs. Mentored the team on utilizing NUnit and MSTest, leading to reduced testing time, increased reliability. Simplified testing and maintenance processes by 20% through consistent TDD practices, resulting in fewer bugs and faster releases. Driven the adoption of Scrum methodology across 17 company projects, enhancing project efficiency and team collaboration. Conducted code reviews for 4 key projects, ensuring high standards of logic, business alignment, and code quality, significantly enhancing system reliability. Architected 4 .Net Core projects from the ground up using Entity Framework, resulting in improved data handling and faster development cycles.

.NET/PHP Developer

EMPLASA•  June 2014 - June 2018•  São Paulo/Brazil

Built a comprehensive a .Net web system that reduced vehicle costs by 17% over two years and cut the number of vehicles by 50%, utilizing .Net, JQuery, and Microsoft SQL Server. Upgraded 4 .Net legacy systems, enhancing performance and code quality through Clean Code methodology, leading to faster processing times and reduced errors. Contributed to 5 PHP projects, applying OOP principles and utilizing MySQL and Apache to enhance functionality and performance, resulting in an augmented system reliability and enhanced user experience.