Hybrid Mid-level Java Developer

at Nuclea

• Job title: Mid-level Java Developer
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, DynamoDB, Java, JUnit, Kafka, Linux, Maven, Mockito, Postgres, Spring, Spring Boot, SpringBoot, SQL
• Location requirements: Hybrid, Sao Paulo, Brazil

About the role

• Java Developer designing and implementing microservices and modern architectures for a fintech company in Brazil. Collaborating on system modernization and ensuring code quality and security.

Responsibilities

• Ensure the use of development best practices, including object-oriented programming, SOLID principles and design patterns to create scalable and maintainable solutions;
• Design and implement microservices using Spring Boot and modern distributed architecture patterns;
• Participate in system modernization, including migrating monolithic applications to AWS using managed services and refactoring strategies;
• Manage the source code lifecycle, including versioning, code reviews and continuous integration, ensuring clean and well-documented code;
• Implement automated tests (unit, integration and performance), and use tools such as SonarQube for code quality and security analysis;
• Apply secure development practices, including vulnerability analysis and best practices to protect APIs and sensitive data;
• Ensure application stability by fixing bugs, monitoring logs and applying continuous improvements;
• Configure, maintain and optimize Linux-based development and production environments;
• Use GitHub Actions for deployment automation and software lifecycle management;
• Work with AWS services such as Lambda, API Gateway, RDS, S3, ECS, EKS, CloudWatch, among others, for deployment, scalability and observability of applications.

Requirements

• Bachelor's degree completed.
• Java SE, Java EE;
• Experience with Java 8 and later (experience with Java 21 is a plus), including Lambdas, Streams and the Date API, etc.;
• Spring Framework;
• Spring Boot, Spring MVC, Spring Data, Spring Security;
• Building RESTful APIs and web services;
• Microservices and software architecture;
• Service communication patterns (REST, messaging — MQ and Kafka, event-driven);
• Experience migrating monoliths to microservices on AWS is a plus;
• PostgreSQL;
• Data modeling, SQL and query optimization;
• DynamoDB;
• Infrastructure and DevOps;
• Application servers: JBoss;
• Linux: basic administration and scripting for automation;
• Maven, Nexus, SonarQube: build management, repositories and code quality;
• GitHub and CI/CD: experience with GitHub Actions and CI/CD pipelines;
• Automated testing: JUnit, Mockito;
• System security and communications;
• Application security: encryption, digital certificates, banking protocols (SPB);
• Web services: REST, JSON, XML, XSD;
• File transfer: Connect Direct and CFT.

Benefits

• Health and dental insurance
• Meal allowance - Caju
• Life insurance
• Home office allowance
• Profit-sharing (PLR)
• Private pension
• Childcare assistance
• WellHub (Gympass)