Mid-Level Backend Developer (Java + Spring Boot), Brazil

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions.

With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.

We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

About the Role

As a Mid-Level Backend Developer (Java + Spring Boot), you will contribute to the design, development, and continuous improvement of scalable backend systems for a B2B e-commerce platform in the alcoholic beverage industry, operating across 40 countries.

You will work on building and maintaining reliable backend services, developing RESTful APIs, integrating distributed systems, and ensuring application quality, security, and performance. By collaborating with cross-functional teams, you will help evolve the platform and deliver scalable, high-quality software solutions that support business needs.

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy. We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day. Our benefits:   -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; -Profit Sharing and Results Participation (PLR); -Life insurance -Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more!   More details about our benefits here: https://ciandt.com/br/pt-br/carreiras   At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it.   We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.

What you will do:

• Develop, maintain, and enhance scalable backend systems using Java, Spring, and Spring Boot.
• Design, implement, and maintain microservices and RESTful APIs to support business functionality and system integration.
• Implement data access and persistence solutions using Spring Data and JPA, working with both relational and non-relational databases.
• Develop and maintain asynchronous communication and event-driven integrations using messaging systems such as Kafka and RabbitMQ.
• Write and maintain unit and integration tests using JUnit and Mockito to ensure code quality, reliability, and maintainability.
• Apply security and performance best practices to build robust and efficient applications.
• Collaborate with cross-functional teams to understand requirements, define technical solutions, and deliver high-quality software.
• Contribute to continuous integration and continuous delivery (CI/CD) processes using tools and technologies such as Docker and Kubernetes.
• Monitor application health, performance, and reliability using observability tools such as New Relic.
• Apply software engineering best practices, including clean code, design patterns, and effective problem-solving techniques.

Must-have:

• Strong proficiency in Java and its associated frameworks, particularly Spring and Spring Boot.
• Solid understanding of microservices architecture and RESTful API design principles.
• Familiarity with relational and non-relational databases, including data modeling and persistence concepts.
• Knowledge of messaging and asynchronous communication systems, such as Kafka and RabbitMQ.
• Hands-on experience with automated testing frameworks, including JUnit and Mockito.
• Proficiency in CI/CD practices and familiarity with containerization and orchestration technologies, including Docker and Kubernetes.
• Strong understanding of object-oriented programming (OOP), data structures, algorithms fundamentals, and problem-solving techniques.
• Knowledge of software design patterns, clean code principles, and software development best practices.
• Understanding of different testing methodologies, including regression, smoke, stress, unit, integration, automated, and end-to-end (E2E) testing.
• Strong analytical and problem-solving skills, with the ability to design effective and maintainable technical solutions.
• Excellent communication and collaboration skills, with the ability to work effectively in cross-functional and international teams.
• Proactive mindset, ownership, and a continuous improvement approach.
• Upper-intermediate to advanced English proficiency, with the ability to communicate clearly in a professional environment.