Skip to content
Raniery
PT — Ler esta página em português

Backend Software Engineer

RanieryMeireles Goulart

I build APIs and microservices in Go and Java, modernizing legacy systems and connecting services.

Get in touchDownload Resume
  • Contagem, MG — Brazil
  • Currently at Engineering

01

About

Backend software engineer specialized in Java and Go, with solid experience in frameworks such as Spring Boot, Hibernate, Spring Data JPA, and Spring Security (JWT).

I have extensive experience building and integrating REST APIs, relational and NoSQL databases, and API gateways with Kong. I also have a working knowledge of messaging systems (RabbitMQ, Apache Kafka) and experience documenting APIs with OpenAPI and Swagger.

Open to new opportunities where I can apply and expand my skills, contributing my experience in building robust, scalable, and efficient solutions.

Focus
Backend · Java · Go
Based in
Contagem, Brazil
Education
Computer Science
Languages
Portuguese, English

02

Experience

  1. Mar 2025 – present

    Software Developer

    Engineering, São Paulo, SP (Remote)

    • Developed REST APIs, orchestrators, and validation middlewares in Go, both for building new microservices and migrating legacy services.
    • Migrated applications using Kubernetes for container orchestration and Kong as an API gateway to manage and secure traffic.
    • Implemented Go templates and validation middlewares to structure and ensure data consistency in requests, increasing the reliability of communication between systems.
    • Optimized the CI/CD pipeline through containerization with Docker and automated deployment pipelines in GitLab, increasing release speed and reliability.
    • Integrated internal systems via gRPC, HTTP, and messaging, with dashboards in Grafana and Kibana/Elastic for monitoring and observability.
    • Suggested process and system improvements, including Generative AI use cases, for one of the company's internal platforms, later implemented by the platform's technical leads.
    • Troubleshot and resolved production incidents as part of an on-call rotation.
    • Go
    • Docker
    • Kubernetes
    • Kong
    • gRPC
    • REST APIs
    • JSON
    • Grafana
    • Kibana/Elastic
    • CI/CD
    • GitLab
    • Redis
    • Python
    • Java
    • Oracle
    • GCP
    • Linux
    • Scrum

  2. Aug 2023 – Mar 2025

    Software Development Intern

    Empresa 1, Belo Horizonte, MG (Remote)

    • Collaborated on the migration of a legacy C++ application to the web using Spring Framework and AngularJS.
    • Designed and optimized SQL queries for relational databases, reducing response time by 30%.
    • Designed and implemented REST APIs with Spring and Hibernate, efficiently integrating internal systems.
    • Automated builds with Maven and managed database migrations with Liquibase, ensuring consistent CI/CD.
    • Worked in agile squads (Scrum), contributing to sprints, backlog refinement, and daily stand-ups for iterative, demand-driven deliveries.
    • Java
    • Spring Framework
    • Hibernate
    • AngularJS
    • JavaScript
    • Oracle
    • SQL
    • Maven
    • Liquibase
    • Wildfly
    • Scrum
    • C++

03

Projects

A selection of personal projects — mostly backend services, with a few complete products.

  1. Shopping-cart-service — Repository (opens in a new tab)

    Shopping cart management microservice with MongoDB and Redis caching.

    • Java
    • Spring Boot 3
    • Spring Data
    • Hibernate
    • MongoDB
    • Redis
    • OpenFeign
    • Lombok
    • Docker
    • Swagger

  2. QuickEvent — Repository (opens in a new tab)

    REST API for managing events, following Clean Architecture and SOLID principles.

    • Java
    • Spring Boot 3
    • Spring Data JPA
    • PostgreSQL
    • Flyway
    • Validation
    • Docker
    • Clean Architecture
    • SOLID

  3. Mnemo — Repository (opens in a new tab)

    Desktop app to organize and watch a local video library, browsing the real folder structure, with progress, tags and thumbnails.

    • Rust
    • Tauri
    • TypeScript
    • React
    • Vite
    • Tailwind CSS
    • Radix UI
    • TanStack Router
    • TanStack Query
    • Zustand
    • Vitest
    • Bun
    • SQLite

  4. Medical Clinic API — Repository (opens in a new tab)

    REST API for managing a medical clinic, developed with Spring Boot and MySQL.

    • Java
    • Spring Boot 3
    • Spring Data JPA
    • Hibernate
    • MySQL
    • Flyway
    • Lombok
    • JUnit
    • Mockito
    • Swagger
    • JWT

  5. E-commerce Chatbot — Repository (opens in a new tab)

    A Spring Bot application that implements an AI-powered customer service chatbot.

    • Java
    • Spring Boot
    • Spring Webflux
    • Thymeleaf
    • JavaScript
    • jQuery
    • OpenAI API

  6. Habits Tracker — Repository (opens in a new tab)

    Full-stack application for monitoring and maintaining daily habits, available for web and mobile.

    • Node.js
    • Fastify
    • Prisma
    • SQLite
    • Swagger
    • React
    • Vite
    • Tailwind CSS
    • Axios
    • React Native
    • Expo

04

Skills

Languages
  • Java
  • Go
  • JavaScript
  • TypeScript
  • Python
  • SQL
  • Shell
Backend
  • Spring Boot
  • Spring Data JPA
  • Spring Webflux
  • Spring Security (JWT)
  • Hibernate
  • Node.js
Databases
  • PostgreSQL
  • MySQL
  • Oracle
  • SQLite
  • H2
  • MongoDB
  • Redis
DevOps / Cloud
  • Docker
  • Kubernetes
  • Kong (API Gateway)
  • Git
  • GitHub Actions
  • GitLab
  • Maven
  • CI/CD
  • GCP
  • AWS
Messaging
  • RabbitMQ
  • Apache Kafka
Frontend
  • Next.js
  • React
  • AngularJS
  • Tailwind CSS
  • Bootstrap
Tools
  • JUnit
  • Mockito
  • Testcontainers
  • Flyway
  • Liquibase
  • Swagger
  • Jest
  • Linux
  • Grafana
  • Elastic

05

Education

  1. Mar 2026 – Mar 2027

    Postgraduate Specialization (Lato Sensu) in Software Engineering

    Uniamérica Descomplicain progress

  2. Jan 2023 – Mar 2026

    Bachelor's Degree in Computer Science

    Uniamérica Descomplica

  3. Feb 2018 – Mar 2021

    Technical Degree in Electro-electronics

    CEFET-MG

Certificates

  • Full Stack Web Development — Curso.dev
  • Stellantis Education Award
  • Oracle Cloud Infrastructure Foundations Associate (1Z0-1085-25)
  • AWS Academy Cloud Architecting
  • AWS Academy Cloud Foundations
  • Oracle Next Education F2 T4 Back-end
  • Formação Python, Data Science no OCI e Oracle Analytics
  • EF SET English Certificate (B2 Upper Intermediate)
  • Java Foundations
  • ChatGPT Prompt Engineering for Developers

Languages

Portuguese
Native
English
Advanced — B2 Upper (EF SET), C2 reading, C1 writing

06

Contact

If you'd like to get in touch, email is the fastest way to reach me.

raniery2003@hotmail.com — Send an email