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Senior Java Developer C2C Jobs in Wisconsin (NOW HIRING)

Luminoustec LLC

Java Developer

Milwaukee, WI · On-site

$50.25 - $65/hr

Senior Java Programmer Job Type: Contract to Hire (6 months) Location: Menominee Falls, Wisconsin What we look for here are the following: 1. Very strong communication skills, especially over the ...

ULINE

Senior Software Developer - Java

Milwaukee, WI

$96K - $148K/yr

Senior Software Developer - Java Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you ready to design, innovate and lead in a ...

ULINE

Senior Software Developer - Java

Kenosha, WI

$96K - $148K/yr

Senior Software Developer - Java Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you ready to design, innovate and lead in a ...

Qualysoft

$60.25 - $76.75/hr

Fur ein langfristiges Projekt in Wien suchen wir ab sofort einen erfahrenen Java Developer (m/w/d) mit Schwerpunkt auf LibreOffice-Entwicklung und Verfahrensautomation. In dieser Rolle arbeiten Sie ...

Hive-X

WI · On-site

$100 - $125/hr

We are looking for a 5 Senior Java Backend Developers / Integration Engineers to strengthen the team working in pharma sector, a strategic integration platform in the healthcare ecosystem. This role ...

Santander

Senior Java Application Developer

Madison, WI · On-site

$175K - $220K/yr

Senior Java Application Developer Country: United States of America It Starts Here: Santander is a global leader and innovator in the financial services industry and is evolving from a high-impact ...

Beveiliging Nieuws

WI · On-site

$80 - $100/hr

Als senior Java developer heb je een uitgebreide kennis van Java-ontwikkeling en kennis van: * Frameworks uit de Java wereld zoals JEE, Spring, JUnit, ... * Werking van relationele databases en SQL

ENTICO ICT

WI · On-site

$100 - $125/hr

Minstens 5 jaar ervaring als Technical Analyst, Technical Designer of Senior Java Developer met analytische verantwoordelijkheden. * Ervaring met technische en/of functionele analyse binnen Agile ...

Hyphen Solutions, LLC

WI · On-site

$150 - $200/hr

Drive engineering standards, microservices adoption, cloud strategy, DevOps practices, and AI ... Design enterprise Java 21+ architectures and contribute directly to coding * Lead the development ...

VeeRteq Solutions Inc.

Java Developer

Waukesha, WI · On-site

$51 - $66/hr

MIn 10+ years of experience in software development using Microsoft technologies. * min 4+ years of experience serving as a Technical Lead, Lead Developer, or Senior Engineer. * Experience designing ...

ADDSOURCE

Java Developer

Waukesha, WI · On-site

$51 - $66/hr

MIn 10+ years of experience in software development using Microsoft technologies. * min 4+ years of experience serving as a Technical Lead, Lead Developer, or Senior Engineer. * Experience designing ...

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Senior Java Developer C2C information

What is a senior Java developer C2C?

A Senior Java Developer C2C is an experienced software engineer who specializes in Java programming and works on a 'Corp-to-Corp' (C2C) basis. This means the developer provides services through their own corporation or business entity, rather than as a direct employee or independent contractor. Senior Java Developers are responsible for designing, developing, and maintaining complex Java applications, leading projects, and mentoring junior developers. C2C arrangements are common in IT contracting, particularly in the United States, and typically require the developer to handle their own business taxes and legal compliance.

What are the key skills and qualifications needed to thrive as a senior Java developer C2C?

To thrive as a Senior Java Developer (C2C), you need expert-level proficiency in Java, object-oriented programming, system architecture, and a solid foundation in computer science, usually supported by a bachelor’s degree or higher. Familiarity with frameworks like Spring, Hibernate, RESTful APIs, version control systems such as Git, and build tools like Maven or Gradle, along with experience in Agile methodologies, is typically required. Strong problem-solving, leadership, and communication skills help you collaborate effectively with cross-functional teams and mentor junior developers. These skills and qualities are crucial for delivering robust, scalable software solutions and ensuring project success in dynamic environments.

What are some common challenges senior Java developers face when working on C2C (Corp-to-Corp) contracts?

Senior Java Developers working on C2C contracts often encounter challenges such as quickly adapting to new project environments, understanding diverse client requirements, and integrating with teams that may have established workflows or legacy systems. Additionally, they need to manage their own business operations, including invoicing and compliance, while maintaining high productivity and technical standards. Effective communication and self-management are essential, as C2C roles may offer less direct supervision compared to traditional employment.

What is the difference between Senior Java Developer C2C vs Java Software Engineer?

AspectSenior Java Developer C2CJava Software Engineer
CredentialsJava certifications, experience in Java SE/EEJava certifications, similar experience
Work EnvironmentContract-based, client-site or remote, project-focusedFull-time, in-house or remote, development team
Industry UsageFreelance/contract roles across industriesPermanent roles in tech companies or enterprises
Search IntentContract Java roles, freelance Java jobsFull-time Java developer positions

While both roles require Java expertise and similar certifications, Senior Java Developer C2C typically involves contract-based, project-specific work often on a freelance basis. Java Software Engineer usually refers to full-time, in-house roles within organizations. The choice depends on whether you're seeking flexible contract work or a permanent position.

What are the most commonly searched types of Java Developer C2C jobs in Wisconsin?

The most popular types of Java Developer C2C jobs in Wisconsin are:

What are popular job titles related to Senior Java Developer C2C jobs in Wisconsin?

For Senior Java Developer C2C jobs in Wisconsin, the most frequently searched job titles are:

What job categories do people searching Senior Java Developer C2C jobs in Wisconsin look for?

The top searched job categories for Senior Java Developer C2C jobs in Wisconsin are:

What cities in Wisconsin are hiring for Senior Java Developer C2C jobs?

Cities in Wisconsin with the most Senior Java Developer C2C job openings:

Senior Java Developer C2C jobs near you
Infographic showing various Senior Java Developer C2C job openings in Wisconsin as of August 2026, with employment types broken down into 80% Full Time, 6% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Senior Java Backend Developer

Madison, WI • On-site

HTC Global Services
IT Services • 10K+ employees
Learn more about HTC Global Servicesexternal

$121K - $157K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

This job post has expired 1 day ago. Applications are no longer accepted.

Job description

Senior Java Backend Developer - Spring Boot & Microservices
Position Overview
Build and support scalable backend systems using Java, Spring, and Spring Boot while working with RESTful APIs, microservices architecture, and cloud-based applications. This role offers the opportunity to design and develop backend services, integrate with external systems, and contribute to application performance, security, reliability, and deployment processes.
What You'll Do / Key Responsibilities
  • Design, develop, and maintain backend services using Java, Spring, and Spring Boot.
  • Build robust and scalable RESTful APIs for web and mobile applications.
  • Develop microservices-based architecture and integrate with external systems.
  • Collaborate with frontend developers, DevOps teams, and product stakeholders.
  • Ensure high performance, security, and reliability of applications.
  • Implement authentication and authorization mechanisms using JWT and OAuth2.
  • Write clean, efficient, and well-documented code.
  • Participate in code reviews and enforce coding standards.
  • Troubleshoot, debug, and optimize existing systems.
  • Contribute to CI/CD pipelines and deployment processes.

Required Qualifications
  • 10+ years of experience in Java development.
  • Strong experience with Spring Framework, including Spring Core, Spring MVC, and Spring Boot.
  • Hands-on experience building RESTful APIs.
  • Proficiency with Java 8+ features, including Streams and Lambda expressions.
  • Experience with ORM frameworks such as Hibernate and JPA.
  • Knowledge of relational databases such as MySQL, PostgreSQL, or Oracle.
  • Familiarity with microservices architecture.
  • Experience with build tools such as Maven or Gradle.
  • Understanding of version control systems, including Git.
  • Basic knowledge of cloud platforms such as AWS, Azure, or GCP.

Preferred Qualifications
  • Experience with Spring Security.
  • Knowledge of messaging systems such as Kafka or RabbitMQ.
  • Familiarity with containerization tools such as Docker and Kubernetes.
  • Experience with API documentation tools such as Swagger or OpenAPI.
  • Exposure to NoSQL databases such as MongoDB.
  • Understanding of caching mechanisms such as Redis or Ehcache.

What Makes HTC A Great Place To Build Your Future
HTC Global Services wants you to join our team. Come build new things with us and advance your career. At HTC Global, you'll collaborate with experts, work alongside clients, and be part of high-performing teams driving success together. You'll have long-term opportunities to grow your career and develop skills in the latest emerging technologies.
At HTC Global Services, our employees have access to a comprehensive benefits package. Benefits can include Group Health (Medical, Dental, and Vision), Paid Time Off, Paid Holidays, 401(k) matching, Group Life and Disability insurance, Professional Development opportunities, Wellness programs, and a variety of other perks.
Our success as a company is built on inclusion and diversity. HTC Global Services is committed to providing a workplace free from discrimination and harassment, where every employee is treated with dignity and respect. We celebrate differences and believe that diverse cultures, perspectives, and skills drive innovation and success. HTC is an Equal Opportunity Employer and a proud National Minority Supplier. We seek to empower each individual, fostering an environment where everyone feels valued, included, and respected.
#LI-Onsite #LI-AS1 #Hiring

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