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CI&T

Senior Java Developer

CI&T

. Work hands-on with complex, existing Java applications and enterprise codebases .

Posted 10/9/2026full-timeRemote • BrazilSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates strong Java development expertise, particularly in enterprise environments, with a focus on modernization and refactoring of complex systems. Proficient in AI-assisted development practices, including reverse engineering and Spec-Driven Development (SDD), while maintaining high standards for code quality and collaboration.

Highest-signal resume keywords
Java DevelopmentAI-Assisted DevelopmentRefactoring Legacy SystemsSpec-Driven Development (SDD)Automated Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Java 17Java 21SQL DatabasesNoSQL DatabasesCode RefactoringSoftware Engineering FundamentalsVersion ControlClean Code PracticesTest GenerationReverse Engineering
Soft Skills
Strong Communication SkillsCollaboration with Technical Teams
Tools & Technologies
GitHub CopilotClaude CodeCodexAntigravity
Industry Keywords
Enterprise CodebasesAI Development WorkflowsAutomated Testing PracticesTechnical ConstraintsBusiness Logic

Tech Stack

Tools & technologies
JavaNoSQLSQL

About the role

Key responsibilities & impact
  • 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 for code generation, analysis, refactoring, testing, and documentation
  • Apply structured AI development approaches, including reverse engineering and Spec-Driven Development (SDD)
  • Refactor and modernize existing Java applications, including removing or replacing legacy dependencies and outdated components
  • Generate and improve automated tests to support safe modernization and refactoring
  • Collaborate with engineering teams and stakeholders to translate requirements and existing system behavior into maintainable technical solutions
  • Help establish effective, repeatable AI-assisted development practices across engineering teams
  • Maintain high standards for code quality, maintainability, testing, and software engineering best practices

Requirements

What you’ll need
  • 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
  • Hands-on experience with Java 17 and Java 21
  • Experience working with SQL (relational) databases
  • Familiarity with NoSQL databases

Benefits

Comp & perks
  • 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
  • Health and well-being team, inclusion specialists, and affinity groups
  • Support and accommodations for people with disabilities during the selection process