mid level, AWS/Kotlin Backend Developer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Mid-Level AWS/Kotlin Backend Developer based in Brazil.

This is an opportunity to join a strategic technology project focused on building robust, scalable backend solutions in a modern cloud environment. You’ll work primarily with Kotlin and AWS , contributing to systems where reliability, performance, and security are critical. The role combines backend engineering with cloud-native development, containerization, messaging, and distributed systems. You’ll be encouraged to challenge technical decisions, explore better approaches, and contribute beyond simply executing predefined tasks. AI-assisted development is also part of the engineering environment, with an emphasis on critically reviewing and validating AI-generated output. You’ll collaborate with experienced technology professionals in a culture that values continuous learning, technical curiosity, and delivery excellence. For candidates based in the Campinas Metropolitan Region, office attendance is required in accordance with the applicable hybrid-work policy.

Accountabilities:: Develop and maintain scalable, reliable backend services using Kotlin , applying sound software engineering and architectural practices.

Design and operate cloud-native solutions on AWS , including services such as EKS/Fargate, SQS, and DynamoDB.

Apply AWS Well-Architected Framework principles to improve reliability, security, performance, operational excellence, and cost efficiency.

Build and maintain event-driven solutions using Kafka and SQS for messaging and streaming.

Develop containerized applications using Docker and deploy and manage workloads through Kubernetes/EKS .

Create and maintain comprehensive unit, integration, and performance tests to ensure software quality and production readiness.

Apply security-by-design principles, including least-privilege IAM, encryption at rest and in transit, and secure secrets management.

Evaluate technical decisions critically, identify potential improvements, and propose alternative approaches when appropriate.

Use AI-assisted development tools such as Devin, Claude Code, Kiro, or comparable solutions to accelerate engineering activities while carefully validating generated code and recommendations.

Collaborate with technical teams and stakeholders to plan, implement, troubleshoot, and continuously improve backend solutions.

Take ownership of delivery quality, technical planning, system reliability, and agreed timelines for critical applications.

Requirements:

Mid-level professional experience in backend software development, with solid hands-on experience using Kotlin .

Strong practical knowledge of AWS , particularly EKS/Fargate, SQS, and DynamoDB.

Experience with AWS Well-Architected Framework principles and cloud-native architecture.

Hands-on experience with Kafka and SQS for messaging, event-driven architectures, or streaming solutions.

Experience developing and maintaining applications using Docker and Kubernetes , preferably AWS EKS.

Strong understanding and practical experience with unit, integration, and performance testing .

Knowledge of secure AWS development practices, including IAM least privilege, encryption, and secrets management.

Experience with AI-assisted software development tools and the ability to critically review, test, and validate AI-generated code.

Strong critical-thinking skills, with the confidence to question technical decisions and recommend better alternatives.

Demonstrated technical curiosity and a willingness to understand the reasoning behind architectures, solutions, and engineering decisions.

Strong ownership, attention to quality, planning skills, and commitment to delivery timelines.

Ability to work collaboratively while also operating independently when solving technical problems.

Location requirement: candidates residing in the Campinas Metropolitan Region are expected to work from the local office according to the applicable attendance policy.

Benefits:

Health and dental insurance.

Meal and food allowance.

Childcare assistance.

Extended parental leave.

Wellhub and TotalPass partnerships for fitness and wellness services.

Profit Sharing and Results ( PLR ).

Life insurance.

Continuous learning through an internal learning platform.

Partnerships with online course and professional development platforms.

Language-learning platform.

Access to physical, mental health, and wellbeing resources.

Pregnancy and responsible-parenting support programs.

Employee discount club and additional partner benefits.

Inclusive workplace with dedicated health, wellbeing, and inclusion support.

Opportunities for continuous professional and technical development.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1