Backend Developer, Kotlin, Mid-level

Internas

Backend Developer in cloud AWS for critical banking systems using Kotlin. Collaborating on technical decisions and ensuring resilience in financial operations.

Posted 6/30/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in backend development using Kotlin and AWS, with a strong focus on security, performance, and resilience. Proficient in utilizing messaging technologies, container orchestration, and AI tools to enhance productivity and code quality.

Highest-signal resume keywords

Kotlin Backend DevelopmentAWS EKS/FargateKafka MessagingDocker KubernetesUnit Integration Performance Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

KotlinAWSKafkaSQSDynamoDBUnit TestingIntegration TestingPerformance TestingDockerKubernetes

Soft Skills

Technical Decision-MakingInnovative Problem-Solving

Tools & Technologies

AWS CloudEKSFargateAI ToolsDevinClaude CodeKiro

Industry Keywords

Security Best PracticesWell-Architected FrameworkMessaging TechnologiesStreaming TechnologiesSecrets Management

Tech Stack

Tools & technologies

AWSCloudDockerDynamoDBKafkaKotlinKubernetes

About the role

Key responsibilities & impact

Develop and enhance mission-critical backend services using Kotlin
Operate in AWS cloud environments, ensuring security, performance, and resilience
Work with messaging and streaming technologies (Kafka, SQS)
Build and run unit, integration, and performance tests
Run Docker containers in orchestrated environments with Kubernetes (EKS)
Actively participate in technical decisions, proposing improvements and innovative solutions
Apply security best practices (IAM least privilege, encryption, secrets management)
Use and validate AI tools to increase productivity and improve code quality

Requirements

What you’ll need

Kotlin: strong experience in backend development
AWS: hands-on experience with EKS/Fargate, SQS, DynamoDB; knowledge of the Well-Architected Framework
Messaging & Streaming: Kafka and SQS
Testing: unit, integration, and performance testing
Containers & Orchestration: Docker, Kubernetes (EKS)
AI Tools: experience with assistants such as Devin, Claude Code, and/or Kiro; ability to critically validate AI-generated output

Benefits

Comp & perks

We value the continuous growth of zuppers, encouraging each person to pursue paths that drive their professional development.