Johanes Ferreira
Senior Full-Stack Software Engineer
Deep expertise in Java microservices and enterprise systems. Building full-stack applications with Rails and React. Creating AI workflows that shift engineering time from routine code to architecture and product thinking.
Experience
Senior Full-Stack Software Engineer
Apr 2025 - Present
SubBase · Remote
- Owned and delivered Concrete Batch Tracking, the project management module that manages concrete pouring from planning through execution and billing synchronization, with dashboards giving live visibility of the budget
- Co-designed an AI document extraction framework that processes PDFs into structured data, replacing manual data entry
- Built an AI automation framework that handles routine coding tasks, shifting engineering time to architecture, review, and product design
- Designed intelligent matching that auto-correlates extracted data with existing records, eliminating hours of manual review
- Improved processing reliability with multi-provider AI failover and unified developer workflow tooling
Senior Software Engineer
Jul 2023 - Mar 2025
ING España&Portugal · Madrid, Spain
- Built payment microservices processing real-time banking transactions for millions of customers
- Championed Java 21 practices by organizing training that upskilled the entire team
- Created monitoring dashboards giving full visibility into payment system health; led build pipeline optimization
- Earned Blue Security Champion, becoming the team reference for secure coding and threat modeling
Senior Software Engineer in Test
Sep 2019 - Jun 2023
EPAM Systems · Katowice, Poland
- Created proprietary libraries adopted across multiple projects as the standard for test data generation
- Designed testing frameworks enabling teams to write automated tests in plain English
- Built CI/CD pipelines automating build-test-deploy; authored guides adopted organization-wide
Senior Software Engineer in Test
Jul 2017 - Jul 2019
Wipro Limited · Curitiba, Brazil
Built test automation for the Amazon–Mastercard integration. Delivered consulting and training across USA, India, and Brazil.
Senior Java Software Engineer
Jun 2016 - Jun 2017
FerreirApps · Pato Branco, Brazil
Founded consulting practice delivering microservices and Android apps for international startup clients.
SOA Architect
Nov 2015 - Apr 2016
BRQ · Curitiba, Brazil
Designed integration architecture for the GVT–Telefónica merger, migrating millions of customers between systems.
Senior Java Software Engineer
Jan 2015 - Nov 2015
Wipro · Curitiba, Brazil
Built high-volume transaction systems for Mastercard payment processing. Mentored new team members.
Java Software Developer
Jan 2010 - Dec 2014
JTech Development · CISS Software · Vietec · Brazil
Built mobile apps, ERP integrations, and server applications across retail, agriculture, and consulting for clients in Brazil and internationally.
Education
Specialization in Java, Information Technology
Universidade Tecnológica Federal do Paraná
2011 - 2012
B.Tech in Information Technology
Centro Universitário Mater Dei (Unimater)
2006 - 2010