Backend Developer, Kotlin – Senior

Internas

Senior Backend Developer working on high-performance core banking systems with Kotlin. Contributing to cloud-native solutions in AWS and collaborating in multidisciplinary teams.

Posted 7/21/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Core Competencies

Role fit

Core Competencies

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

Demonstrates expertise in backend development using Kotlin, with a strong focus on building cloud-native solutions on AWS. Proficient in implementing secure, scalable architectures and CI/CD practices while collaborating effectively with multidisciplinary teams.

Highest-signal resume keywords

Backend Development With KotlinAWS EKS/FargateKafka Messaging & StreamingDocker & Kubernetes OrchestrationAWS Well-Architected Framework

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Backend DevelopmentKotlinAWSEKSFargateSQSDynamoDBKafkaUnit TestingIntegration Testing

Soft Skills

CollaborationTechnical DiscussionsCode ReviewsContinuous Improvement

Tools & Technologies

DockerKubernetesCI/CD PipelinesAI Tools

Industry Keywords

Core Banking SystemsCloud-Native SolutionsSecurity-By-Default PracticesEvent ProcessingAgile Ceremonies

Tech Stack

Tools & technologies

AWSCloudDockerDynamoDBKafkaKotlinKubernetes

About the role

Key responsibilities & impact

Develop, evolve, and maintain backend services using Kotlin, ensuring high performance, scalability, and security for core banking systems in a mission-critical environment.
Contribute to the architecture and implementation of cloud-native solutions on AWS, using EKS/Fargate for container orchestration, SQS for messaging, DynamoDB for persistence, and applying AWS Well-Architected Framework practices to ensure robustness, cost efficiency, and compliance.
Implement messaging and streaming integrations with Kafka and SQS, ensuring resilience, monitoring, and reliable event processing in distributed systems.
Develop and automate unit, integration, and performance tests, build robust CI/CD pipelines, and contribute to the continuous improvement of code quality.
Build, maintain, and evolve Docker containers, implementing orchestration via Kubernetes (EKS) to ensure secure, scalable, and highly available deployments.
Actively participate in technical discussions, code reviews, the definition of architectural patterns, and design decisions—questioning approaches, proposing improvements, and sharing knowledge with the team.
Apply security-by-default practices, such as IAM least privilege, encryption at rest and in transit, and secure secrets management—anticipating risks and ensuring solution compliance.
Explore and validate the use of AI tools to support development, critically reviewing AI-generated outputs and promoting responsible innovation in day-to-day work.
Collaborate with multidisciplinary teams (Product, QA, SRE, Security), participating in agile ceremonies, technical alignments, and continuous improvement initiatives.

Requirements

What you’ll need

Strong experience in backend development with Kotlin
Hands-on experience with AWS, especially EKS/Fargate, SQS, and DynamoDB
Practical knowledge of the AWS Well-Architected Framework
Messaging & streaming: Kafka and SQS
Testing: Experience with unit, integration, and performance tests
Containers: Docker and orchestration with Kubernetes (EKS)

Benefits

Comp & perks

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