[Job - 31296] Master Backend Developer / Tech Lead — Java, Go & AWS, Brazil

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.

We are looking for a Senior Backend Engineer / Tech Lead to design and build high-performance backend services and cloud-native infrastructure on AWS. You will work with modern technologies (Java 21, Spring Boot 3, Go, Kubernetes, Terraform) to deliver scalable, secure and observable platforms, while leading the team technically and collaborating daily in English with international stakeholders.
Must-Have Skills (Required):

Backend Engineering

• Java 21 with Spring Boot 3.x as core backend stack.
• Go for real-time streaming / relay services.
• REST API design using Spring Web and OpenFeign.
• MongoDB / DocumentDB: data modeling, Mongock migrations, QueryDSL.
• Redis for caching (Spring Data Redis).
• WebSocket and real-time communication patterns.
• Spring Security, OAuth2/OIDC (Cognito integration).
• Event-driven architectures: SNS, SQS, Spring Integration, state machines.

DevOps / Infrastructure

• Terraform (modules, service composition, state management).
• AWS services: EKS, ECR, Lambda, VPC, IAM, S3, CloudFront, SSM, Secrets Manager, API Gateway.
• Kubernetes (deployments, service accounts, IRSA, namespaces).
• Docker (multi-stage builds, container security best practices).
• GitLab CI/CD (pipelines and multi-environment promotion: dev → test → UAT → prod).
• Networking concepts: NLB, DNS, security groups, WAF.
• Monitoring & observability: CloudWatch, Dynatrace, Micrometer/Prometheus.
• Secrets management: AWS Secrets Manager and SSM Parameter Store.

Communication & Leadership

• Comfortable communicating daily in English and explaining complex technical ideas clearly.
• Ideally experience as PDM (Product/Delivery Management) and team leadership (technical guidance, mentoring).

Nice to Have:

• Video/media infrastructure: SRS, FFmpeg, RTMP/SRT, AWS MediaLive, MediaPackage.
• Rust for performance-critical Lambda workloads.
• SonarQube and other code quality tooling.
• Cost optimization and capacity planning on AWS.
• Gradle build system (Groovy + Kotlin DSL).

Key Responsibilities:

• Design, implement and maintain backend services in Java and Go for high-availability and real-time use cases.
• Define and evolve REST APIs, event-driven flows and real-time communication patterns.
• Build and manage cloud infrastructure on AWS using Terraform and Kubernetes (EKS).
• Set up and maintain CI/CD pipelines in GitLab, ensuring secure, repeatable deployments across environments.
• Implement observability, monitoring and alerting to ensure reliability and performance.
• Collaborate closely with product, engineering and other stakeholders, communicating clearly in English.
• Provide technical leadership to the team: code reviews, architecture decisions, mentoring and best practices.
• Contribute to cost optimization, capacity planning and security hardening of the platform.

What Success Looks Like
You deliver robust, scalable backend and cloud solutions that are secure, observable and cost-aware. The team looks to you for technical direction and you help align architecture, delivery and business goals by clearly communicating complex ideas and leading by example.

If this sounds like the kind of challenge you’re looking for, please apply — we’d be happy to talk with you.
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