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Feliphe Alves

@feliphealves

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I build scalable Java microservices, APIs, and high-performance enterprise systems.

Brazil

Message

I've built and maintained Java microservices at Vint Global for automated document validation, auditing, corporate form verification, and PDF reporting.

I design RESTful APIs with Spring Boot, Spring Security, OAuth2, JWT, Swagger/OpenAPI, MongoDB, and database-per-service architectures. I also validate resilient workflows through JUnit 5 and stress tests of up to 500 concurrent requests.

At G4F, I reduced PostgreSQL query latency by approximately 60% by restructuring SQL, analyzing execution plans, and applying strategic indexes across tables with more than 2.5 million records. I also consolidated six JBoss artifacts into a unified deployable solution and improved legacy code quality with SonarQube.

My work spans financial platforms at Sinqia, public systems for Brazil's Ministry of Economy at Life Solutions, and high-throughput enterprise applications at Lampp-it. I've led five developers, modernized Java 7 and JBoss systems to Spring Boot, and optimized systems handling roughly 25,000 daily operations.

Experience

Work history, roles, and key accomplishments

Java Backend Engineer

Vint Global

Jan 2024 - May 2026 (2 years 4 months)

Engineered and maintained scalable microservices using Java 17/21 and Spring Boot for automated document validation, auditing, and corporate form verification. Designed RESTful APIs with Swagger/OpenAPI and integrated MongoDB for dynamic rule processing.

Java Spring Boot Spring Security OAuth JWT REST APIs Microservices MongoDB Swagger OpenAPI JUnit5 Performance Testing

Java Developer

G4F

Jun 2022 - Dec 2023 (1 year 6 months)

Optimized PostgreSQL databases and RESTful APIs, achieving approximately 60% reduction in query latency. Refactored JBoss components and enforced code quality with SonarQube.

Java PostgreSQL SQL Query Optimization EXPLAIN ANALYZE Indexing JBoss SonarQube

Java Developer

Sinqia

Sep 2021 - May 2022 (8 months)

Developed and maintained financial software solutions for Investment and Fund Management platforms. Resolved production defects and optimized batch processes and SQL queries.

Java SQL Financial Systems Batch Processing Debugging

Technical Lead / Java Developer

Life Solutions

Dec 2020 - Aug 2021 (8 months)

Led a technical team of 5 developers in modernizing mission-critical systems for the Ministry of Economy. Coordinated migration from legacy Java 7/JSP/JBoss to Spring Boot and conducted code reviews.

Java Spring Boot Hibernate JBoss Technical Leadership Code Review Version Control

Java Developer

Lampp-it

Aug 2019 - Nov 2020 (1 year 3 months)

Developed and maintained enterprise systems using Java 7, JSF, and Hibernate, including HR software and modules for the Electronic Judicial Process (PJe). Optimized PostgreSQL routines for high-throughput workflows.

Java JSF Hibernate PostgreSQL SQL Enterprise Systems