Mario Batista

Built secure web applications and payment API integrations for government visa processing, focusing on TLS-secured channels, transaction reliability, data privacy, and compliance. Increased visa-processing efficiency by 30% and implemented TLS-secured communication channels across 90+ countries.

Built and managed scalable backend systems for a high-traffic e-commerce site, enhancing integrations, order processing, and overall performance. Expanded and optimized APIs, worked with relational databases, caching strategies, and cloud environments, and collaborated with cross-functional teams.

Developed web solutions for leisure and tourism, including booking, pricing, and integrations platforms. Focused on backend, web services, database performance, and maintainable full-stack delivery.

Led development in a team of 4 developers for an online travel business, supporting delivery across multiple web systems and operational improvements. Increased efficiency by 40% and enhanced payment processing speed by optimizing payment architecture and integrating bank APIs.

Supported a large-scale e-commerce outlet platform serving more than 2 million customers and around 500 suppliers, contributing to core website functionality and online sales operations.

Supported a major telecom client by delivering two sales commission projects in collaboration with .NET developers and BI analysts. Managed 2 sales commission projects, coordinating work across distributed systems.

Developed Windows and web applications for a major travel business, with responsibility for software delivery and SQL Server database process performance. Expanded applications using Classic ASP, C#, VB.NET, VB6, and .NET Framework 3.5, and monitored SQL Server 2008 database processes.

Developed mortgage workflow and core integration systems in the banking sector, supporting business-critical process automation and application delivery. Amplified application efficiency by 50% by developing the mortgage workflow for Banco Espírito Santo using the BPM framework and designing scalable microservices.

Licentiate Degree (5-year, pre-Bologna) in Computer Engineering and Information Technology from Escola Superior de Tecnologia do Instituto Politécnico de Castelo Branco, completed in 2006.