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Senior Java Developer C2C Jobs in Middleton, WI (NOW HIRING)

The Sr. Integration Engineer works closely with the Automation Solutions Architect and cross ... Strong backend development skills in Python, Java, or C#. * Experience designing and building ETL ...

The Sr. Integration Engineer works closely with the Automation Solutions Architect and cross ... Strong backend development skills in Python, Java, or C#. * Experience designing and building ETL ...

Principal Software Engineer

Madison, WI

$136K - $182K/yr

Position Overview The Principal Software Engineer is a senior Individual Contributor and cross ... Programming languages such as C, C++, Java, JavaScript, Python, SQL, PL/SQL, .NET, Google Web ...

Principal Software Engineer

Madison, WI · On-site

$136K - $182K/yr

Position Overview The Principal Software Engineer is a senior Individual Contributor and cross ... Programming languages such as C, C++, Java, JavaScript, Python, SQL, PL/SQL, .NET, Google Web ...

Required : • Bachelor's degree in engineering, physics, computer science, math, information ... Python, Java, or C#. • Experience designing and building ETL/ELT pipelines and working with ...

Work closely with senior leadership to develop and execute the application development strategy ... Proficient understanding of multiple programming languages such as Java, C#, Python or similar ...

... work to senior leadership and communicate trade-offs clearly. Preferred * Prior experience ... Familiarity with backend languages/platforms commonly used for identity services (e.g., Go, Java ...

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Senior Java Developer C2C information

See Middleton, WI salary details

$11

$63

$86

How much do senior java developer c2c jobs pay per hour?

As of Jul 10, 2026, the average hourly pay for senior java developer c2c in Middleton, WI is $63.05, according to ZipRecruiter salary data. Most workers in this role earn between $55.24 and $70.43 per hour, depending on experience, location, and employer.

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 key skills and qualifications needed to thrive as a Senior Java Developer (C2C), and why are they important?

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 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 cities near Middleton, WI are hiring for Senior Java Developer C2C jobs? Cities near Middleton, WI with the most Senior Java Developer C2C job openings:
Geospatial Backend Developer Multiple Positions at Junior/Mid/Senior Levels

Geospatial Backend Developer Multiple Positions at Junior/Mid/Senior Levels

NV5

Sun Prairie, WI • On-site

Full-time

Medical, Dental, Life, Retirement

Re-posted yesterday


NV5 rating

8.3

Company rating: 8.3 out of 10

Based on 20 frontline employees who took The Breakroom Quiz

96th of 359 rated engineering


Job description

Geospatial Backend Developer – Multiple Positions at Junior/Mid/Senior Levels

NV5 Geospatial (NV5G) is actively recruiting qualified and cleared Geospatial Back End Developers to support national security client sites in the Northern Virginia and St. Louis, MO areas. Candidates will build software leveraging Esri’s products and APIs to build core backend services that solve complex problems at a global scale. From building intuitive AI interfaces to writing Python for geoprocessing tools and AI agents, you’ll be exposed to the full development lifecycle and cutting edge GIS solutions. A Top Secret Clearance with SCI eligibility or an active TS/SCI are required conditions of employment.

Work Environment:

  • Location: St. Louis, MO Area (St. Louis, MO and/or St. Charles, MO)
  • Travel up to 15% of the time

At NV5, we are a collaboration of intelligent, innovative thinkers who care for each other, our communities, and the environment.  We value both heart and head, the diversity of our people, and their experiences because that is how we continue to grow as a leader in our industry and expand our individual and collective potential.

NV5 is a global technology solutions and consulting services company with a workforce of over 4,500 professionals in more than 100 offices worldwide.  NV5’s continued growth has been spurred through strategic investments in firms with unique capabilities to help current and future customers solve the world’s toughest problems.  The NV5 family brings together talent across a wide range of markets and fields, including Professional Engineers, Professional Land Surveyors, Architects, Photogrammetrists, GIS Professionals, Software Developers, IT, Project Management Professionals, and more.


  • Build backend services that power geospatial processing, automation, and user-facing capabilities
  • Develop APIs, proxies, and integration services using Node.js and Python
  • Create and maintain backend tooling that extends ArcGIS Enterprise in containerized environments
  • Develop and maintain geoprocessing services, automation scripts, and operational workflows
  • Build connectors and ingestion pipelines across diverse enterprise data sources
  • Support deployments across cloud-native and on-prem environments
  • Improve reliability and performance through API design, testing, monitoring, and observability
  • Collaborate with platform, DevOps, and GIS teams to translate requirements into production solutions

Required Qualifications:

  • US citizenship with Active or Current (within two years of active) Top Secret Security Clearance with SCI eligibility
  • Bachelor’s degree in Computer Science, Engineering, Geographic Information Systems (GIS), or STEM-related field
  • 2+ years of experience as a backend software engineer or equivalent practical experience
  • Hands-on experience developing backend services using Python, JavaScript/Node.js, Java (for enterprise integrations and services)
  • Experience designing and building REST APIs and service-based architectures
  • Experience extending or integrating with ArcGIS Enterprise or similar enterprise geospatial platforms
  • Familiarity with geoprocessing workflows, proxies and middleware services, and automation of GIS or data processing tasks
  • Experience working in containerized environments (Docker, Kubernetes, or similar)
  • Solid fundamentals in API design, software/systems design, and testing and debugging distributed services
  • Strong problem solving, communication, and collaboration skills

 Preferred Qualifications:

  • Master’s degree in Computer Science, Engineering, Geographic Information Systems (GIS), or STEM-related field
  • Esri certification
  • CompTIA Security+ certification
  • Experience with containerization technologies such as Docker and Kubernetes
  • Familiarity with cloud platforms (Azure, AWS, or GCP)
  • Experience with monitoring, logging, and observability tools
  • Exposure to DevSecOps practice and secure development pipelines
  • Experience with ArcGIS Enterprise SDKs, automation frameworks, or platform extensions
  • Experience building services for geospatial analysis, data pipelines, or map services
  • Familiarity with enterprise authentication, proxies, and secure service architectures
  • Experience with relational and spatial databases (PostgreSQL/PostGIS, SQL Server, etc.)
  • Exposure to event-driven architectures, batch processing, or distributed data workflows

Clearance Requirement:

  • Active/Current Top Secret Clearance with SCI Eligibility

NV5 offers a competitive compensation and benefits package including medical, dental, life insurance, FTO, 401(k) and professional development/advancement opportunities.

Employment is contingent upon successful completion of a background check and drug screening.

NV5 provides equal employment opportunities (EEO) to all applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state, and local laws. NV5 complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including, but not limited to, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.

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About NV5

Sourced by ZipRecruiter

NV5 is a renowned company based in Los Angeles, CA, US, that operates in the architecture, engineering, and consulting industry. Officially established in 2009, this company provides technical engineering and consulting solutions that cater to public and private sectors globally. The firm is adept in a wide range of services, including infrastructure, energy, construction, program management, and environmental services. As part of its mission, NV5 seeks to deliver solutions that enhance communities and safeguard the environment meticulously.

Industry

Civil engineering construction

Company size

1,001 - 5,000 Employees

Headquarters location

Los Angeles, CA, US