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CI&T

Mid-Level Support Engineer L3, Java, Spring Boot

CI&T

. Provide Level 3 (L3) technical support for backend applications developed with Java, Spring, and Spring Boot .

Posted 10/27/2026full-timeRemote • BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

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

Demonstrates expertise in providing Level 3 technical support for backend applications, with a strong focus on Java, Spring, and Spring Boot. Proficient in troubleshooting complex issues, analyzing performance metrics, and implementing preventive solutions to enhance application stability.

Highest-signal resume keywords
JavaSpringSpring BootMicroservices ArchitectureCI/CD Practices

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Application SupportTroubleshootingRoot Cause AnalysisUnit TestingIntegration TestingSQL QueriesPerformance AnalysisObject-Oriented ProgrammingDesign PatternsClean Code
Soft Skills
Problem-SolvingAnalytical SkillsCommunication SkillsProactive MindsetCollaboration
Tools & Technologies
New RelicDockerKubernetesJUnitMockitoKafkaRabbitMQ
Industry Keywords
Backend SystemsRESTful APIsMicroservicesObservability ToolsTesting Methodologies

Tech Stack

Tools & technologies
DockerJavaJUnitKafkaKubernetesMicroservicesMockitoRabbitMQSpringSpring BootSpringBootSQL

About the role

Key responsibilities & impact
  • Provide Level 3 (L3) technical support for backend applications developed with Java, Spring, and Spring Boot
  • Investigate, troubleshoot, and resolve complex application incidents and production issues escalated from previous support levels
  • Perform root cause analysis, identify recurring issues, and implement long-term preventive fixes
  • Analyze application logs, errors, and performance metrics using monitoring and observability tools such as New Relic
  • Maintain, troubleshoot, and improve microservices, RESTful APIs, and system integrations
  • Investigate issues involving relational and non-relational databases, including data access and persistence using Spring Data and JPA
  • Troubleshoot asynchronous communication and messaging integrations using Kafka and RabbitMQ
  • Implement bug fixes, code improvements, and preventive solutions to enhance application stability and performance
  • Develop and maintain unit and integration tests using JUnit and Mockito
  • Collaborate with development, infrastructure, and support teams to resolve incidents and improve system reliability
  • Support application deployment and CI/CD processes using Docker and Kubernetes
  • Document technical investigations, solutions, and recurring issues for knowledge sharing and continuous improvement

Requirements

What you’ll need
  • Solid hands-on experience with Java, Spring, and Spring Boot
  • Experience in application support, production troubleshooting, or maintenance of backend systems, preferably in L3 support environments
  • Strong troubleshooting and problem-solving skills, with the ability to investigate complex technical issues and identify root causes
  • Solid understanding of microservices architecture and RESTful APIs
  • Experience analyzing application logs, monitoring system behavior, and investigating performance issues
  • Knowledge of monitoring and observability tools, such as New Relic
  • Familiarity with relational and non-relational databases, including SQL queries and persistence frameworks such as Spring Data and JPA
  • Knowledge of messaging systems such as Kafka and RabbitMQ
  • Experience with automated testing frameworks, including JUnit and Mockito
  • Familiarity with CI/CD practices, Docker, and Kubernetes
  • Good understanding of object-oriented programming, design patterns, clean code, and software engineering best practices
  • Understanding of testing methodologies, including unit, integration, regression, smoke, and end-to-end testing
  • Proactive mindset, ownership, and ability to work collaboratively across technical teams
  • Strong analytical and communication skills
  • Upper-intermediate to advanced English proficiency, with ability to communicate effectively in an international environment

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
  • Inclusion support and accommodations during the selection process
  • Dedicated Health and Well-being team, inclusion specialists, and affinity groups