Leilton César

Lead development of internal banking systems for client Sicoob, including NPS, governance portal, information security portal, product sales campaign system and accounting portal. Architected scalable REST APIs and optimized relational database schemas to support secure transactional workflows and reporting.

Maintained and delivered features for the Infracommerce Omni platform (B2B/B2C) used by Tommy stores, covering checkout, order processing, inventory and returns. Optimized search and indexing using Elasticsearch and improved API reliability and performance through query and schema tuning.

Technical lead for the Spread development team on the Albert Einstein healthcare project; architected and delivered a scheduling and productivity management system for hospital staff. Designed real-time features using WebSockets and Kafka; implemented serverless components and NoSQL storage for scalability.

Built full-stack features in Node.js and React Native for Komeco's IoT platform, enabling reliable device communication, telemetry collection and real-time control. Developed serverless components and NoSQL storage to improve scalability and device onboarding workflows.

Developed and enhanced ERP modules and internal systems to automate business processes. Implemented integrations with third-party services, maintained critical systems, and improved reporting and operational workflows to support business continuity.

Implemented platform backend features, maintained application availability, and resolved production incidents. Improved code quality and performance across the PHP codebase and participated in deployments and CI workflows.

Backend developer for PRPI at IFAL; developed Communica, a submissions management system for institutional publications. Designed APIs and storage using Node.js, PHP and MongoDB/MySQL to manage article submissions and reviews.

Web developer building and customizing government websites using Joomla: developed templates and modules, ensured responsive design and accessibility, and coordinated with stakeholders to meet public-sector requirements.

Provided IT support (helpdesk, network and server maintenance), managed backups and cloud servers, and developed internal systems and the company website to improve operations and uptime.

Developed internal web systems and reporting tools to support operations and management reporting. Implemented integrations and UIs using PHP, VB, ASP.NET and Java; ensured data integrity and performance in MySQL.

Computer Support and HelpDesk, Networks and Server Configuration Windows Server 2003.

Activities and societies: Comunica - Research Project (2016/2017)

Bachelor in Information Systems. Participated in the Comunica research project in 2016/2017.

Activities and societies: Futsal (team captain); Development Group (monitoring)

Middle School Computer Technician. Served as futsal team captain and participated in a development group.