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Java Software Engineer

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Onsite

Java Software Engineer

Aptonet Inc

Java Software Engineer

Skills

DockerReactTypescriptJavaMicroservicesSpring BootPostgreSQLPlaywrightAWSKubernetesCompliance

5 days ago

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Important information


Contract type:

Freelance / Contract

Location:

Brazil

Work mode:

Onsite

Published on:

16 October 2026

What they need


About the job

We are seeking a Full Stack Software Engineer to develop and enhance modern cloud-native applications using Java, React, and Kubernetes-based technologies. The ideal candidate will have strong backend and frontend development skills, experience with distributed systems, and a passion for building scalable, secure, and high-performing enterprise solutions.

Responsibilities

  • Design, develop, and maintain full-stack applications using Java, Spring Boot, React, and TypeScript.
  • Build and support microservices and distributed workflows in cloud-native environments.
  • Design and optimize PostgreSQL databases, data models, and application performance.
  • Develop modern user interfaces using React, TypeScript, and responsive design principles.
  • Implement workflow orchestration solutions using Temporal IO or similar platforms.
  • Deploy and support applications in Kubernetes and OpenShift environments.
  • Integrate applications with AWS services including S3, SES, and SNS.
  • Contribute to CI/CD pipelines, testing strategies, code quality initiatives, and automation efforts.
  • Collaborate with cross-functional teams to deliver secure, scalable, and reliable solutions.
  • Participate in code reviews, architecture discussions, and continuous improvement initiatives.

Required Skills

  • 5+ years of experience developing enterprise applications with Java.
  • Strong experience with Java 17+ and Spring Boot microservices.
  • Deep knowledge of PostgreSQL, database design, query optimization, indexing, and Flyway migrations.
  • Experience building applications with React and TypeScript.
  • Knowledge of modern frontend development using Vite, React Router, and API integrations.
  • Experience with workflow orchestration platforms such as Temporal IO or Cadence.
  • Hands-on experience with Docker, Kubernetes, OpenShift, and containerized applications.
  • Experience with CI/CD pipelines and modern DevOps practices.
  • Strong understanding of REST APIs, distributed systems, and software design principles.
  • Experience with Git, automated testing, and code quality tools.

Preferred Skills

  • Experience in highly regulated industries requiring audit trails, compliance controls, or governance requirements.
  • Experience with AWS cloud services.
  • Knowledge of Istio Service Mesh.
  • Experience with Playwright, Vitest, JUnit, Mockito, SonarQube, or similar testing and quality tools.
  • Experience designing highly scalable and resilient cloud-native architectures.

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