[Hiring] Senior Java Developer @CI&T

Role Description

We are looking for a Development Engineer with strong Senior Java engineering experience and hands-on expertise using AI-assisted development tools in real software delivery environments. This role is ideal for an experienced engineer who combines deep technical knowledge of enterprise Java systems with a practical understanding of modern AI-enabled engineering workflows. You will work directly with existing applications and engineering teams, using AI development tools to:

• Understand complex codebases
• Accelerate development
• Modernize legacy systems
• Improve test coverage
• Support structured software development practices

Responsibilities:

• Work hands-on with complex, existing Java applications and enterprise codebases.
• Analyze and reverse-engineer existing systems to understand architecture, dependencies, business logic, and technical constraints.
• Use AI-assisted development tools as an integral part of the engineering workflow, including code generation, analysis, refactoring, testing, and documentation.
• Apply structured AI development approaches, including reverse engineering, Spec-Driven Development (SDD), and automated test generation.
• Refactor and modernize existing Java applications, including the removal or replacement of legacy dependencies and outdated components.
• Generate and improve automated tests to support safe modernization and refactoring.
• Collaborate closely with engineering teams and stakeholders to translate requirements and existing system behavior into maintainable technical solutions.
• Help establish effective, repeatable AI-assisted development practices that can be shared across engineering teams.
• Maintain high standards for code quality, maintainability, testing, and software engineering best practices.

Qualifications

• Strong Java development experience, ideally within enterprise environments and complex existing systems.
• Strong hands-on experience with Java application development, maintenance, refactoring, and modernization.
• At least 3 months of hands-on experience using Copilot as the primary AI code-generation tool within a team project, OR at least 6 months of practical experience with comparable AI coding tools, such as Claude Code, Codex, GitHub Copilot, Antigravity, or similar.
• Practical experience with shared, structured AI development workflows, particularly reverse engineering and/or Spec-Driven Development (SDD).
• Hands-on experience using AI-assisted workflows for test generation.
• Practical experience refactoring existing Java systems to remove or replace legacy dependencies.
• Strong ability to understand and navigate unfamiliar and complex codebases.
• Solid software engineering fundamentals, including clean code, automated testing, version control, and collaborative development practices.
• Strong communication skills and the ability to collaborate effectively with technical teams and stakeholders.

Requirements

• Hands-on experience with Java 17 and Java 21 (Nice to Have).
• Experience working with SQL (relational) databases (Nice to Have).
• Familiarity with NoSQL databases (Nice to Have).

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