Senior Java Developer IV

Madison, United States | Posted on 11/04/2026

We are seekinga highly skilled and experienced Senior Java Developer with strong hands-on expertise in Java, Spring framework/Spring Boot, Messaging Queues, Caching and Angular to join our client's dynamic team. The ideal candidate will develop,and maintain robust, scalable, and high-performance applications seamlessly integrating Java-based backend systems with Angular-based front-ends. This role requires a proactive problem solver who thrives in a collaborative, fast-paced environment.

Important Details:

Onsite or Remote:
Candidate MUST be a resident local to Madison or near the Madison office, or willing to relocate to Madison prior to starting the role at theirown expense. The selected hire can work 100% remote from within the Madison area but must be available to come into the office if needed. Candidate must be relocated 1 month after

Hire Date.

Interview Process:
Two Round Interview Process. Both rounds will be In-person interviews only.

Contract Duration: 6/30/2027, likely to extend.

Key Responsibilities:

• Develop and maintain Java (8 to 21)-based backend applications, ensuring high performance and scalability.
• Unittest and code coverage using Junit.
• Usespring boot, messaging queues, caching and Kafka, Redis and or equivalent tools.
• Develop and maintain Angular (21)-based front-end user interfaces with a focus on responsiveness, usability, and ADA/WCAG compliance.
• Unittests using Junit and Play Wright.
• Collaborate with cross-functional teams, including business analysts, and APM/QA engineers,to gather and implement requirements.
• Createand maintain RESTful APIs for seamless integration between frontend and backendsystems.
• Troubleshoot and resolve technical issues, ensuring system reliability and robustness.
• Stayup to date with industry trends, emerging technologies, and best practices inJava and Angular development.
• Code reviews and contribute to code quality and standards to ensure high-quality product delivery.
• Participate in the full software development lifecycle, including requirements gathering,design, coding, testing, and deployment.

Required Skills:

• Strong proficiency in Java, Spring Framework (Spring Boot), Hibernate/JPA, Message queuing, and caching. (8 + yrs experience).
• Experience with web applications development, web services, REST API, etc. (8 + yrs experience).
• Advanced skills in Angular (21), Typescript, HTML5, and CSS
  3.
• Experience designing,creating, and documenting RESTful API using Spring Boot and OpenAPI.
• Practical knowledge of, and experience with, various middleware platforms like Apache Kafka, Redis, andBOOMI.
• Familiarity with CI/CD pipelines, deployment automation, and dynamic environment configuration.
• Experience developing wire frames and mock-ups as a tool to communicate design concepts with stakeholders.
• Strong knowledge of relational databases like Oracle.
• Familiarity with cloud platforms like AWS, Azure, Google Cloud.
• Excellent problem-solving and analytical skills.
• Strong verbal and written communication skills.
• Proven ability to work both independently and collaboratively in a team environment.
• Knowledge of containerization and orchestration tools like Docker and Kubernetes.
• Familiarity with Agile/Scrum, Iterative, and waterfall development methodologies.
• Experience using AI(Prompts/Skills/MCP) to speed up development process.

Nice toHave

Skills:

Hourly rate for 1099: $79.00

Hourly rate for W2: $56.00

Full-Time W2 employees may receive the following benefits:

• Health and Dental Insurance
• Life Insurance
• Short/Long Term Disability Insurance
• Simple IRA
• Referral Bonus
• Employee Assistance Program

Keystone Consulting, Inc. is an equal opportunity employer and is following Wisconsin's Contract Compliance law. U.S. Citizens and those authorized to work in the U.S. are encouraged to apply. We are unable to sponsor at this time.

Keystone Consulting, Inc. participates in E-Verify.