Senior Java Developer – LATAM Only (Remote)

Filled
February 23, 2026
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Job Description

Job Type: Contract / Freelance
Experience Level: Senior (5+ years)
Language Requirement: Advanced English (daily communication)

Role Overview

We are looking for an experienced Senior Java Developer to help modernize an existing desktop-based software solution. The ideal candidate has strong expertise in modern Java, legacy system refactoring, and integrations with local hardware and native libraries.

You will work in a fast-paced technical environment, collaborating with engineers, QA teams, and product stakeholders to deliver reliable and scalable solutions.

Key Responsibilities

  • Migrate a Java 8 desktop application to Java 17 or later
  • Refactor and optimize legacy code while maintaining backward compatibility
  • Evaluate and implement modern frameworks such as Spring Boot
  • Redesign local system communication using REST APIs
  • Maintain integrations with hardware devices such as scanners, tokens, and certificate stores
  • Work with native libraries (JNI / JNDI) and handle compatibility with 32-bit components
  • Modernize the desktop UI layer using JavaFX or alternative technologies
  • Participate in code reviews, architecture discussions, and technical documentation
  • Collaborate with cross-functional teams to deliver production-ready features

Required Skills

  • 5+ years of experience as a Java Developer
  • Strong proficiency in Java 11+ (preferably Java 17–25)
  • Experience building desktop applications (JavaFX, Swing, etc.)
  • Solid understanding of REST APIs and modular architectures
  • Experience with native integrations or hardware-level communication
  • Knowledge of certificate stores, cryptographic devices, or digital signatures
  • Familiarity with Git, CI/CD pipelines, and Agile development
  • Strong problem-solving and communication skills

Ideal Candidate

  • Comfortable working independently
  • Detail-oriented and proactive
  • Experienced with modernization of legacy systems
  • Able to communicate clearly with distributed teams

Application Process

Please include the following in your proposal:

  • Brief professional introduction
  • Portfolio, GitHub, or code samples
  • Relevant experience with:
    • Java migrations
    • Desktop applications
    • Hardware integrations

Important:
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