Senior Java Developer

Description

Summary:

Onset Technologies is seeking an experienced Senior Java Developer to support application development initiatives for the Texas Health and Human Services Commission. The ideal candidate will have strong full-stack development experience using Java/J2EE, Spring Boot, and modern JavaScript frameworks such as React or Angular. This role requires hands-on expertise across the full application lifecycle, including design, development, API integration, performance tuning, and security implementation.

Responsibilities:

• Design, develop, and maintain front-end user interfaces and back-end services using Java, Spring Boot, and modern JavaScript frameworks.
• Participate in high-level and detailed design, development, testing, and deployment of new application components.
• Manage full application lifecycle including database design, API integration, testing, and deployment.
• Create and maintain technical and design documentation.
• Analyze applications for configuration and performance tuning opportunities.
• Identify code vulnerabilities and implement remediation measures.
• Implement responsive, client-facing web applications.
• Integrate web services into Angular or React-based single-page applications (SPAs).
• Apply best practices for application design, scalability, performance, and maintainability.
• Perform other duties as assigned.

Required Skills/Experience:

• 8+ years designing and developing web-based applications using Java and J2EE technologies.
• 8+ years front-end UI development using modern JavaScript frameworks (React or Angular).
• 8+ years experience in web services design and development, including API integration.
• 8+ years experience with open-source Java frameworks such as Spring Boot.
• 8+ years implementing RESTful service security using JWT, OAuth, or similar standards.
• 8+ years experience implementing applications utilizing JEE application servers.
• 8+ years experience building responsive, client-facing applications.
• 8+ years experience integrating web services into Angular or React SPAs.
• Strong experience implementing best practices for performance, scalability, and maintainability.

Preferred Skills/Experience:

• 5+ years experience with JBoss Enterprise Application Platform .
• 5+ years experience working in Agile development environments .
• Experience working with state government or healthcare/public sector systems (nice to have).

What We Offer:

• Short- to mid-term contract opportunity with direct client engagement.
• Hybrid work model at Austin, TX location. 3 days remote / 2 days onsite (Mon & Tues required onsite)
• High-impact public sector technology initiatives

Eligibility:

• Must be local to Austin and be eligible to work in the U.S. without sponsorship.

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