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Java Developer

Company:
3500 Square LLC
Location:
Arecibo, Puerto Rico, 00612
Posted:
March 18, 2026
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Description:

Job Description

Java Developer with React Experience – 3500 Square, LLC

Need to be a U.S. citizen

3500 Square, LLC is seeking a talented Java Developer with proven experience in React to join our dynamic technology team supporting mission-critical projects for federal and commercial clients.

Key Responsibilities:

Design, develop, and maintain scalable backend solutions using Java and Spring Boot.

Build responsive and interactive user interfaces with React and modern JavaScript frameworks.

Collaborate with cross-functional teams to deliver end-to-end solutions from backend services to frontend applications.

Integrate APIs and maintain secure, efficient data workflows between systems.

Participate in agile development, code reviews, and continuous improvement processes.

Required Qualifications:

Professional experience building applications with Java (Spring Boot preferred).

Hands-on experience developing web interfaces using React.

Strong understanding of RESTful API design and integration.

Familiarity with SQL or NoSQL databases.

Experience working within agile, cross-functional teams.

Bilingual proficiency in English and Spanish.

Preferred Skills:

Exposure to cloud platforms, DevOps, or containerization (e.g., Docker, Azure, AWS).

Knowledge of testing frameworks and CI/CD pipelines.

Previous work with enterprise or regulated industry clients.

What We Offer:

The opportunity to contribute to impactful national projects.

A collaborative and diverse team environment.

Support for ongoing professional development.

Full-time

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