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CI&T

Senior Java Developer – Sustaining

CI&T

Sustaining payment applications for a major insurer in Brazil. Conducting troubleshooting and optimizing Java code for performance and reliability.

Posted 6/2/2026full-time🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies
AWSCloudJavaMongoDBNoSQL

About the role

Key responsibilities & impact
  • Perform troubleshooting and in-depth investigation of failures and issues, such as slowdowns or inconsistencies in the payment flow (e.g., Pix, Card).
  • Use analytical skills to interpret logs, metrics, and system data, identifying root causes of incidents quickly and accurately.
  • Develop and implement bug fixes in Java code, and work on performance optimization and MongoDB query tuning.
  • Actively monitor the production environment using observability tools such as Dynatrace, and create tags and monitoring dashboards as needed.
  • Actively participate in problem and incident management, collaborating with partner teams to ensure SLA compliance and application health.
  • Proactively analyze and reverse-engineer unexpected system behaviors, proposing permanent architectural improvements to prevent recurrence.

Requirements

What you’ll need
  • Strong experience in back-end development using Java.
  • Hands-on experience troubleshooting production systems.
  • Experience with NoSQL databases, especially MongoDB.
  • Familiarity with observability tools (e.g., Dynatrace).
  • Basic experience with cloud computing services, preferably AWS.
  • Strong analytical ability to diagnose complex problems—essential for a sustaining/support role.
  • Practical experience with Event-Driven Architecture and messaging (publisher/subscriber), understanding asynchronous flows, queues, topics, and resilience concepts (e.g., retries, dead-letter queues).

Benefits

Comp & perks
  • Health and dental insurance;
  • Meal and food allowance;
  • Childcare assistance;
  • Extended parental leave;
  • Partnerships with gyms and health/wellness professionals via Wellhub (Gympass) / TotalPass;
  • Profit sharing (PLR);
  • Life insurance;
  • Continuous learning platform (CI&T University);
  • Employee discount club;
  • Free online platform for physical and mental health and well-being;
  • Pregnancy and responsible parenthood course;
  • Partnerships with online course platforms;
  • Language learning platform;
  • And many others

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
JavaMongoDBEvent-Driven Architecturemessagingasynchronous flowsqueuestopicsresilience conceptstroubleshootingperformance optimization
Soft Skills
analytical abilityproblem managementincident managementcollaborationcommunication