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Freelance Senior Software Engineer Jobs in Wisconsin

Celestia Antwerp BV

WI · On-site

$120 - $170/hr

Senior Software Engineer The Senior Software Engineer will join the department in charge of the development of satellite communication products. These include equipment covering a wide span of ...

Schneider

Senior Software Engineer

Green Bay, WI · On-site

$119K - $157K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Software Engineer Work model:On-Site Location:Green Bay, WI, USA Shift:First shift Job level:Individual Contributor Schedule:Full time; Monday-Friday, 8 a.m.-5 p.m. Apply now Get job alerts ...

IMG LIVE

Senior Software Engineer

Oregon, WI · On-site

$131.25 - $175/hr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer**WME is building the next generation of internal platforms that power one of the world's leading entertainment companies.We're looking for a Senior Software Engineer who ...

ULINE

Senior Software Engineer

Pleasant Prairie, WI

$118K - $156K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

Uline

Senior Software Engineer

Pleasant Prairie, WI

$118K - $156K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

ULINE

Senior Software Engineer

Pleasant Prairie, WI · On-site

$118K - $156K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

ULINE

Senior Software Engineer

Kenosha, WI · On-site

$119K - $157K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

Uline

Senior Software Engineer

Pleasant Prairie, WI

$118K - $156K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

ULINE

Senior Software Engineer

Milwaukee, WI · On-site

$120K - $159K/yr

  • Medical

  • Retirement

  • PTO

Senior Software Engineer Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Are you an expert at developing software solutions from start to finish? Then you belong at Uline! Join ...

Husch Blackwell Llp

Senior Software Engineer

Madison, WI · On-site +1

$123K - $162K/yr

  • Medical

  • Dental

  • Life

  • Retirement

  • PTO

The Senior Software Engineer designs, builds, and maintains the technical systems and application infrastructure that power high-quality, human-centered information experiences. This role is ...

Husch Blackwell Llp

Senior Software Engineer

Milwaukee, WI · On-site +1

$120K - $158K/yr

  • Medical

  • Dental

  • Life

  • Retirement

  • PTO

The Senior Software Engineer designs, builds, and maintains the technical systems and application infrastructure that power high-quality, human-centered information experiences. This role is ...

Husch Blackwell LLP

Senior Software Engineer

Milwaukee, WI · On-site +1

$120K - $158K/yr

The Senior Software Engineer designs, builds, and maintains the technical systems and application infrastructure that power high-quality, human-centered information experiences. This role is ...

Groundworks Operations, LLC

WI · On-site

$120 - $150/hr

The Senior Software Engineer at Groundworks will play a key role in designing, developing, and maintaining high-quality software solutions that support the company's business goals. This position ...

Husch Blackwell LLP

Senior Software Engineer

Madison, WI · On-site +1

$123K - $162K/yr

The Senior Software Engineer designs, builds, and maintains the technical systems and application infrastructure that power high-quality, human-centered information experiences. This role is ...

Alegeus

Senior Software Engineer

Milwaukee, WI · Hybrid

$120K - $159K/yr

  • Medical

  • PTO

Senior Software Engineer Join our team at Alegeus, where you'll experience unmatched opportunity and a culture that cares deeply about succeeding together. As a Senior Software Engineer, you'll drive ...

GE HealthCare

Senior Software Engineer

Waukesha, WI · On-site

$122K - $161K/yr

As a Senior Software Engineer, you will own the design, development, and delivery of next-generation compute solutions for Magnetic Resonance Imaging (MRI) scanners, working with cross-functional ...

Fiserv, Inc.

Senior Software Engineer

Milwaukee, WI · On-site

$120K - $159K/yr

Job Title Senior Software Engineer TITLE: Senior Software Engineer EMPLOYER: Fiserv Solutions, LLC LOCATION: Milwaukee, WI (and various unanticipated locations throughout the US subject to ...

Fiserv, Inc.

Senior Software Engineer

Milwaukee, WI · On-site

$120K - $159K/yr

Job Title Senior Software Engineer TITLE: Senior Software Engineer EMPLOYER: Fiserv Solutions, LLC LOCATION: Milwaukee, WI (and various unanticipated locations throughout the US subject to ...

Dim3 - Clinical Nutrition

WI · On-site

$120 - $180/hr

As Senior Software Engineer, you can have a tangible impact in helping medical practitioners translate their needs into smart software. Scope Starting from use cases designed with end-users and the ...

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Freelance Senior Software Engineer information

What is a freelance senior software engineer?

Freelance Senior Software Engineers are highly experienced software professionals who work independently rather than as full-time employees of a single company. They take on contract-based projects for various clients, often leading development teams, architecting systems, and solving complex technical problems. Their responsibilities typically include coding, reviewing code, mentoring junior engineers, and ensuring that software solutions meet client requirements. Freelance senior engineers offer flexibility and specialized expertise, making them a valuable asset for businesses needing advanced software solutions without long-term commitments.

What are some common challenges faced by freelance senior software engineers when managing multiple client projects simultaneously?

Freelance Senior Software Engineers often juggle multiple projects for different clients, which can present challenges such as balancing competing deadlines, adapting to varying coding standards, and maintaining clear communication across diverse teams. Time management and setting realistic expectations are crucial to ensure high-quality deliverables. Additionally, staying up to date with new technologies and industry best practices helps maintain a competitive edge and satisfy client requirements.

What are the key skills and qualifications needed to thrive as a freelance senior software engineer, and why are they important?

To thrive as a Freelance Senior Software Engineer, you need advanced programming expertise, strong problem-solving skills, and a proven track record in software development, often backed by a relevant degree and years of experience. Familiarity with version control systems like Git, cloud platforms such as AWS or Azure, and mastery of frameworks and languages (e.g., JavaScript, Python, Java) are crucial, along with certifications like AWS Certified Solutions Architect or Microsoft Certified: Azure Developer Associate. Outstanding communication, time management, and self-motivation are vital soft skills for independently managing projects and collaborating with diverse clients. These competencies ensure you can deliver high-quality, scalable solutions while building strong client relationships and managing multiple projects efficiently.

What is the difference between Freelance Senior Software Engineer vs Freelance Software Developer?

AspectFreelance Senior Software EngineerFreelance Software Developer
Experience LevelTypically 5+ years, with leadership and architecture skillsVaries from entry-level to mid-level, focused on coding and implementation
ResponsibilitiesDesigning systems, leading projects, mentoringWriting code, developing features, fixing bugs
CredentialsStrong portfolio, possibly certifications like AWS, ScrumPortfolio, coding skills, possibly certifications
Work EnvironmentRemote or client-site, often in tech companies or startupsRemote or client-site, in various industries

Freelance Senior Software Engineers typically have more experience, leadership responsibilities, and focus on system design, while Freelance Software Developers concentrate on coding and feature development. Both roles are in high demand in the freelance market, but the senior role often commands higher rates due to expertise and project scope.

What are popular job titles related to Freelance Senior Software Engineer jobs in Wisconsin?

For Freelance Senior Software Engineer jobs in Wisconsin, the most frequently searched job titles are:

What job categories do people searching Freelance Senior Software Engineer jobs in Wisconsin look for?

The top searched job categories for Freelance Senior Software Engineer jobs in Wisconsin are:

Freelance Senior Software Engineer jobs near you

Senior Software Engineer

Celestia Antwerp BV

WI • On-site

$120 - $170/hr

Other

Posted 13 days ago

Job description

Celestia Antwerp BV is active in the space sector enabling customers to fulfill their needs when it comes to Satellite Integration with products ranging from Ground Station Products to Test Systems.

Senior Software Engineer

The Senior Software Engineer will join the department in charge of the development of satellite communication products. These include equipment covering a wide span of products such as high-speed data receivers used in scientific missions, telecommand and telemetry baseband modems, RF digitizers, RF frequency converters and many others.

Tasks and Responsibilities
  • Actively contribute to the development of real‑time software applications, including Linux kernel device driver, CCSDS communication protocol stack, Monitoring & Control agent, Web‑GUI…
  • Play a key role in the software architectural design activities, finding synergies amongst products.
  • Participate in conferences and sometimes present technical achievements.
Qualifications and Experience
  • Master’s degree in software engineering or equivalent through experience.
  • Strong C / C++ development skills on Linux are mandatory.
  • Proven experience with developing high‑performance multi‑threaded “real time” software applications.
  • Solid understanding of Linux systems programming (POSIX threads, synchronization mechanisms, shared memory, IPC, process scheduling).
  • Experience with high‑speed data transfer (PCIe, DMA, DPDK) is a strong asset.
  • Experience with containers and deployment technologies (Docker, Kubernetes) is a plus.
  • Ability to write clear technical documentation and interface specifications.
  • Highly motivated, team player, dynamic, creative, sense of ownership and commitment.
  • Fluent in English is mandatory.
Job Offer

A professional and stimulating working environment in the space sector. We also offer an attractive remuneration with many fringe benefits. If interested, please send your motivation letter and your resume to hr@celestia-antwerp.be.

What's Great in the Job?
  • Great team of smart people, in a friendly and open culture
  • No wasted time in enterprise processes, real responsibilities and autonomy
  • Expand your knowledge of various business industries
  • Create content that will help our users on a daily basis
  • Real responsibilities and challenges in a fast evolving company

Each employee has a chance to see the impact of their work. You can make a real contribution to the success of the company. Several activities are often organized all over the year, such as weekly sports sessions, team building events, monthly drinks, and much more.

A full-time position.
Attractive salary package.

Trainings

12 days per year, including 6 of your choice.

Sport Activity

Play any sport with colleagues. The bill is covered.

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