Senior-Level Java Developer

Company: Genesis10
Location: Waukesha
Posted on: May 16, 2025

Job Description:

Genesis10 is seeking a Senior-Level Java Developer on-site in Waukesha, WI.

Below covers everything you need to know about what this opportunity entails, as well as what is expected from applicants.

Responsibilities:
Lead end-to-end development and enhancement of complex Java-based web applications and microservices
Guide and mentor a team of developers, conduct code reviews, and provide performance feedback
Champion Agile practices, including daily stand-ups, sprint planning, retrospectives, and story pointing
Refactor and modernize legacy systems to improve performance, maintainability, and scalability
Collaborate with cross-functional teams, including DevOps, QA, and Product teams
Design and implement cloud-native services using AWS, CI/CD pipelines, and DevOps tools
Develop and maintain secure, high-performing applications in Java, JavaScript, Angular, and Node.js environments
Interface with stakeholders to gather requirements and translate them into technical specifications
Maintain documentation and contribute to knowledge-sharing within the engineering team


Requirements:
10+ years of hands-on software engineering experience, primarily in Java and web technologies
Strong front-end experience with JavaScript, Angular, React, and Node.js
Deep expertise in SQL and relational databases (Oracle, PostgreSQL)
Proficiency with Spring, Hibernate, JSP/Servlets, and RESTful services
Experience leading teams, conducting code reviews, and mentoring junior developers
Solid understanding and application of SOLID principles and object-oriented design
Demonstrated experience with Agile methodologies (Scrum/Kanban)
Familiarity with CI/CD tools (Jenkins, GitHub, JIRA) and AWS Cloud services
Excellent debugging, troubleshooting, and problem-solving skills
Strong communication and leadership abilities


Preferred Qualifications:
Experience working in or supporting healthcare technologies, especially imaging systems like MR, CT, or PET
Background in .NET Core, GraphQL, or microservice architecture
Familiarity with TDD, SOAP services, and performance testing tools such as LoadRunner
Exposure to container orchestration platforms like Kubernetes


Only candidates available and ready to work directly as Genesis10 employees will be considered for this position.

If you have the described qualifications and are interested in this exciting opportunity, please apply!

About Genesis10:
Ranked a Top Staffing Firm in the U.S. by Staffing Industry Analysts for six consecutive years, Genesis10 puts thousands of consultants and employees to work across the United States every year in contract, contract-for-hire, and permanent placement roles. With more than 300 active clients, Genesis10 provides access to many of the Fortune 100 firms and a variety of mid-market organizations across the full spectrum of industry verticals.
For contract roles, Genesis10 offers the benefits listed below. If this is a perm-placement opportunity, our recruiter can talk you through the unique benefits offered for that particular client.

Benefits of Working with Genesis10:
--- Access to hundreds of clients, most who have been working with Genesis10 for 5-20+ years.
--- The opportunity to have a career-home in Genesis10; many of our consultants have been working exclusively with Genesis10 for years.
--- Access to an experienced, caring recruiting team (more than 7 years of experience, on average.)
--- Behavioral Health Platform
--- Medical, Dental, Vision
--- Health Savings Account
--- Voluntary Hospital Indemnity (Critical Illness & Accident)
--- Voluntary Term Life Insurance
--- 401K
--- Sick Pay (for applicable states/municipalities)
--- Commuter Benefits (Dallas, NYC, SF)

For multiple years running, Genesis10 has been recognized as a Top Staffing Firm in the U.S., as a Best Company for Work-Life Balance, as a Best Company for Career Growth, for Diversity, and for Leadership, amongst others. To learn more and to view all our available career opportunities, please visit us at our website.

Genesis10 is an Equal Opportunity Employer. Candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran

Keywords: Genesis10, Janesville , Senior-Level Java Developer, IT / Software / Systems , Waukesha, Wisconsin