Silas Yudi

Digital signature services in Java with Spring Boot, Bouncy Castle and iText, running on Docker with Amazon Corretto; web application in PHP 7/8 with Symfony on Apache.
• Defined and implemented 4 internal libraries, extracting the code shared by the PDF and digital signature microservices, removing duplication and standardizing behavior across services.
• Split the digital signature microservice

• Taught a hands-on Microsoft Copilot Studio course to 7 non-technical professionals at GDM, an agribusiness company, speeding up AI adoption in internal processes.
• Guided participants in building 9 automations with Copilot Studio agents and agent flows, applied to real business needs.

• Technical mentor for squads of 3 to 4 junior developers in IT NeoCamp, Mercado Livre's inclusion program for people with disabilities, focused on Java and deliveries on a real project.
• Role fully dedicated to the rookies' growth, without taking implementation tasks: code review, unblocking, support reading technical documentation and teaching advanced programming techniques.
• Taught software

• Improved the unit test suite with JUnit 5 and Mockito, increasing coverage and readability, raising coverage from 50% to 75% in one month.

Livelo is Brazil's largest credit card rewards program, with 20 million users.
• Built an application in Python and Flask to help managers form development teams based on candidates' technical skills.
• Contributed to the reference documentation for unit testing in Java, with proof-of-concept microservices showing a 60% performance gain in Jenkins.

• Developer on the order module of Livelo's marketplace: 8 REST microservices in Java and Spring Boot, a Node.js BFF and asynchronous order processing with RabbitMQ.
• Primary owner of unit testing, with over 90% coverage across all microservices.
• Helped build a sandbox environment for client testing, using Axway for gateway control and Jenkins for deployment.

• Hands-on technical lead for a team of 9 supporting and evolving SIGFácil, a business-registration system used by 11 state agencies serving states with a combined population of 50 million people.
• Improved code quality by setting automated test coverage targets with PHPUnit and GitLab CI, cutting production issues by 80%.
• Helped make 4 of the 5 fastest Brazilian states for opening a business S

• Implemented the digital signature module for accounting books, speeding up registration by removing the need for notary authentication, using PHP, Symfony, Java and Spring Boot.
• Integrated the digital signature module with GOV.BR, Brazil's federal digital identity platform, removing the need for clients to buy a certificate token, using PHP, Symfony, Java and Spring Boot.
• Built the integrati

Anymarket is an integration platform between e-commerce stores and marketplaces.
• Worked on the integration between Anymarket and Mercado Livre, Latin America's largest marketplace, using Java and Spring Boot, with 100% availability during Black Friday.
• Built the Promotions Center in Java and AngularJS, simplifying the management of promotions and discounts and automatically pushing price updat

• Evolved the Java electronic signature application, until then packaged as a JAR, into a Spring Boot microservice, starting the platform's migration to a microservices architecture.
• Developed Automatic Approval based on the rules of each state Commercial Registry (Junta Comercial), speeding up business-opening approvals in 11 states, using PHP and Symfony.
• Implemented the digital case and dig

• Developed an Android app for visually impaired people that reads aloud the information in Obras 4D, an augmented reality system for monitoring public works built in partnership with the Paraíba State Court of Accounts.

Worked as Support Analyst at Vox Tecnologia.

• Developed SistematX, a data management system for secondary metabolites, including the Advanced Search in Java and JavaScript, which converts the molecule drawn by the user into SMILES notation and runs a similarity search against the database.

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Thesis "BlindHelper App", a mobile app that lets visually impaired people access multimedia systems with augmented reality, with software registration at INPI (BR512019001498-7) and an INOVA UFPB award.

Undergraduate research at the Cheminformatics Laboratory. Final project on SistematX, a data management tool for secondary metabolites, which produced one journal publication, two full conference papers, two software registrations at INPI and two INOVA UFPB awards.