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NNSZ Andrew

Software Engineer · Java & Backend

Turning complex problems into well-built software.

I'm Andrew, a software developer focused on Java, Spring Boot, APIs and backend systems. I use and orchestrate AI tools such as Devin and Claude Code to build efficient, scalable and well-structured solutions.

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Core stack

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Java & web development

  • Java
  • REST
  • Spring Boot
  • Spring Web
  • Spring Data JPA
  • Spring Security
  • Spring Cloud
  • Spring Netflix
  • Spring Batch

Applied AI & orchestration

I use and orchestrate Devin and Claude Code in software development, combining prompt engineering, Vibe Coding and technical review of solutions.

  • Devin
  • Claude Code
  • Vibe Coding
  • Prompt Engineering
  • AI Tool Orchestration

SQL & NoSQL databases

  • PostgreSQL
  • MySQL
  • Oracle
  • Microsoft SQL Server
  • MongoDB
  • Redis

Messaging

  • Kafka
  • RabbitMQ
  • Redis Pub/Sub

Infrastructure & cloud

  • AWS
  • Azure
  • Docker
  • Kubernetes
  • Amazon EKS
  • Linux
  • CI/CD
  • Jenkins
  • GitHub Actions

AWS services

  • EC2
  • ECS
  • API Gateway
  • S3
  • SNS
  • SQS
  • Lambda
  • CloudWatch
  • DynamoDB
  • RDS
  • ECR
  • WAF
  • IAM

Architecture & microservices

  • Microservices Architecture
  • Design Patterns
  • Hexagonal Architecture
  • API Design
  • System Design
  • Unit Testing
  • Observability
  • Grafana

Version control

  • Git
  • GitHub

Featured projects

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Integrations

Clínica Fisioterapeuta - Nelmara Ribeiro

I led the development of a cross-platform system (desktop and mobile) for a healthcare clinic, focused on automation and scalability. I was responsible for the API, client communication, cloud deployment and app integration.

JavaSpring BootAWS RDSAWS EC2AWS S3DockerReact Native
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Developer tools

Insta Live Slim

Instagram live simulator with editable information, view counts, comments and more.

Vibe CodingTypeScriptCSS
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Backend

Projeto de microserviços de um Banco Digital - Spring Boot

Banking system developed using a microservices-based architecture. The goal is a scalable, resilient infrastructure for account creation, transfers, credit management and payments, alongside security features such as fraud detection.

JavaSpring BootDockerKafkaFeign ClientRedisMySQLMongoDBKeycloakResilience4J
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Mentorship

NSZ Mentorship

A mentorship for those who want to grow as backend developers, with practical and direct guidance.

JavaSpring BootBackend development
See all →nszmentoria.com.br ↗

Contact

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