André Osmarin
Maringá, Parana,PR
Summary
Hello, I’m André. I’m a Senior Software Engineer and Java Specialist with around 5 years of experience building scalable systems for finance, integrations, and logistics. In the last few years, I worked on projects related to Pix, Brazil’s instant payment system, ERP integrations, and transportation platforms, handling critical business flows, high availability, and real production issues. What motivates me most is solving complex backend problems and building systems that are reliable, fast, and useful in real life. My main stack includes Java, Spring Boot, Kafka, Hibernate, Redis, MongoDB, RabbitMQ, PostgreSQL, Docker, Kubernetes, Azure, and AWS. I’ve also worked on microservices, integration flows, ETL pipelines, shared libraries, and cloud migration projects, with experience applying Hexagonal Architecture, DDD, TDD, SOLID, Design Patterns, and best practices. Some results I’m proud of include reducing integration delivery time from more than 1 year to around 2 months, improving report performance from 30 seconds to under 2 seconds, supporting and maintaining more than 15 backend APIs in production, and working across 3 projects for Bradesco, a major Brazilian bank, in 1 year. I’m always looking for new challenges and opportunities to apply my skills to meaningful projects. Let’s connect and see how we can build reliable, scalable solutions that make a real impact.
Overview
5
5
years of professional experience
1
1
Certification
Work History
Senior Software Engineer
Capgemini
04.2025 - Current
- Worked across 3 Bradesco projects in 1 year — Pix Partner Integrations, Pix API, and Consortiums — building Java and Spring Boot microservices for large financial systems.
- Built backend services with Java, Spring Boot, Kafka, MongoDB, Redis, Docker, Azure, and CI/CD, with a focus on performance and scalability.
- Helped clear the sprint backlog early and took on more complex work, including new services, shared libraries, and a gateway filter for the gradual migration from a SQL Server API to a MongoDB API.
- Built a Redis management service from scratch using hexagonal architecture to handle feature toggles in production, and also created a shared validation library used by multiple services.
- Helped lead an urgent demand in the Consortium project, supporting the migration of hundreds of services from on-premise to Azure, contributing to a broader infrastructure cost reduction effort, and later presented the solution and key learnings to 30+ people.
Software Engineer
teceo
07.2023 - 04.2025
- Earned 2 promotions in 2 years because of strong delivery, ownership, and the ability to build scalable backend solutions for complex integration flows.
- Designed and built an integration abstraction using hexagonal architecture, reducing the delivery time of a new integration from more than 1 year to around 2 months by reusing the core flow and implementing only system-specific rules.
- Built and supported integration flows between Teceo and external ERPs using microservices, RabbitMQ, PostgreSQL, Docker, Kubernetes, and AWS, keeping product, order, and other business data in sync at scale.
- Improved report performance from 30 seconds to under 2 seconds by building an ETL pipeline from PostgreSQL to ClickHouse using dbt and Airflow, making large reports much faster for end users.
- Worked with clients to gather business and technical requirements, and helped improve engineering quality through code reviews, technical discussions, and process improvements as part of the quality committee.
Software Engineer
Eureka Labs
09.2021 - 06.2023
- Earned 4 promotions in 2 years because of strong performance, fast adaptation across different projects and technologies, and consistent delivery in production-critical environments.
- Worked with Docker, Kubernetes, AWS, CI/CD, PostgreSQL, Oracle, and RabbitMQ while supporting backend systems and integrations across 15+ applications for a major transportation group.
- Built a Discord bot for an internal platform used by about 100 employees. It automated birthday messages, work log reminders, performance alerts, and recognition messages, saving the HR team hours of manual work each day.
- Built an AWS Lambda solution to generate custom birthday images automatically, replacing a manual process and allowing the feature to handle high load on peak usage days.
- Led the end-to-end delivery of a SOAP integration API for a transportation client, including client meetings, requirements gathering, technical design, development, testing, deployment, and production support; also fixed a critical production issue in 1 hour that left hundreds of trucks stopped and unable to enter the screening yard for around 3 hours.
Education
Bachelor's Degree - Software Engineering
UniCesumar
05-2026
Computer Technician - Information Technology
Instituto Federal do Paraná - Campus Paranavaí
12-2017
Skills
- Java
- Spring Boot
- AWS
- Microservices
- Kafka
- SQL
- Hibernate
- Design Patterns
- SOLID
- Integration Testing
- Software Architecture
- Distributed Systems
Certification
- Design Patterns with Java
- GitHub Copilot
- Complete Java Object Oriented Programming
Languages
Portuguese (Native or Bilingual)
English (Full Professional)
Timeline
Senior Software Engineer
Capgemini
04.2025 - Current
Software Engineer
teceo
07.2023 - 04.2025
Software Engineer
Eureka Labs
09.2021 - 06.2023
Computer Technician - Information Technology
Instituto Federal do Paraná - Campus Paranavaí
Bachelor's Degree - Software Engineering
UniCesumar