[Job-32240] Senior Java Developer

Team: Prod_Pyxis

Location: Brazil

Commitment: Homeoffice

Workplace Type: remote

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.

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• Refactor and modernize existing Java applications, including the removal or replacement of legacy dependencies and outdated components.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.

Requirements:

• 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.

Nice to Have:

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