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Sr Software Jobs in Wisconsin (NOW HIRING)

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 ...

Senior Software Developer - Web Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Enhance and support world-class websites at Uline. As a ...

Senior Software Developer - Web Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Enhance and support world-class websites at Uline. As a ...

Senior Software Developer - Web Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Enhance and support world-class websites at Uline. As a ...

Senior Software Developer - Web Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Enhance and support world-class websites at Uline. As a ...

Senior Software Developer - Web Pay from $96,000 to $148,000 per year Corporate Headquarters 12575 Uline Drive, Pleasant Prairie, WI 53158 Enhance and support world-class websites at Uline. As a ...

WI · On-site

$90 - $120/hr

Your Role at VITO As a Senior Software Engineer, you will play a key role in the evolution of our operational EO services. You will participate in: * Evolving and hardening our operational EO ...

New

Senior Software Engineer

Oregon, WI · On-site

$160 - $200/hr

As a Senior Software Engineer at rePurpose, you will play a central role in architecting and scaling our platform -- building the reliable, high-performance systems that power compliance workflows ...

New

Sr. Software Engineer

Waukesha, WI · On-site

$122K - $161K/yr

GE HealthCare is shaping the next generation of MR scanner technology, seeking a Senior Software Engineer. This role involves designing, developing, and testing software components in a collaborative ...

WI · On-site

$85 - $125/hr

The Senior Software Developer will lead and participate in all areas of development including design, coding, and testing in collaboration with the team. Responsibilities: * Responsible for the ...

New

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 ...

New

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 ...

Senior Software Engineer

Milwaukee, WI · On-site

$120K - $158K/yr

In the Senior Software Engineer position, you'll lead the development of intelligent, adaptive, and scalable applications by leveraging AI-powered development tools and machine learning models. You ...

WI · On-site

$110 - $150/hr

TechFlow is seeking an experienced Senior Software Architect / Lead Software Engineer to support a mission-critical DoD software development and modernization program in Montgomery, AL. This program ...

New

Senior Software Engineer

Milwaukee, WI

$120K - $159K/yr

In the Senior Software Engineer position, you'll lead the development of intelligent, adaptive, and scalable applications by leveraging AI-powered development tools, machine learning models, and ...

Senior Software Engineer

Waukesha, WI · On-site

$122K - $161K/yr

Summary As a Senior Software Engineer, you will own the design, development, and delivery of nextgeneration compute solutions for Magnetic Resonance Imaging (MRI) scanners. Working across global ...

Senior Software Engineer II

Milwaukee, WI · Hybrid

$120K - $159K/yr

Senior Software Engineer II 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 II, you'll ...

Senior Software Engineer

Waukesha, WI · On-site

$122K - $161K/yr

Summary 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 across global ...

Showing results 21-40

Sr Software information

What are the key skills and qualifications needed to thrive as a senior software engineer?

To thrive as a Senior Software Engineer, you need strong proficiency in programming languages (such as Java, Python, or C#), software architecture, and a bachelor’s degree in computer science or a related field. Expertise with development frameworks, version control systems like Git, and cloud platforms such as AWS or Azure is commonly required, along with certifications like AWS Certified Solutions Architect. Leadership, problem-solving, and effective communication skills help you mentor junior engineers and collaborate across teams. These skills ensure the delivery of robust, scalable solutions and foster innovation within complex technical environments.

What is the difference between Sr Software and Software Developer?

AspectSr SoftwareSoftware Developer
Required CredentialsBachelor's degree in CS or related field; 3+ years experience; sometimes certificationsBachelor's degree in CS or related field; 0-3 years experience; certifications optional
Work EnvironmentOften leads projects, mentors juniors, involved in architecture decisionsFocuses on coding, debugging, and implementing features under guidance
Employer & Industry UsageUsed across tech companies, startups, and enterprise firms for senior rolesCommon entry to mid-level role in software development teams

The main difference between a Sr Software and a Software Developer lies in experience, responsibilities, and leadership. Sr Software professionals typically have more experience, take on leadership roles, and influence project architecture, while Software Developers focus on coding and implementing features. Both roles require a strong foundation in programming, but the Sr Software position involves greater oversight and strategic input.

What does a senior software engineer do?

A Sr Software Engineer is responsible for designing, developing, and maintaining complex software applications. They often lead technical projects, mentor junior team members, and collaborate closely with stakeholders to ensure software meets business objectives. Their role typically involves writing high-quality code, reviewing code from peers, and making architectural decisions. Sr Software Engineers are also expected to stay updated with industry trends and best practices to improve software performance and reliability.

What are some common challenges faced by senior software engineers when leading project teams, and how can they effectively overcome them?

Senior Software Engineers often encounter challenges such as balancing hands-on coding with mentoring less experienced team members, managing project timelines, and ensuring code quality across the team. Effective communication and proactive planning are key to overcoming these hurdles. By fostering a collaborative environment, setting clear expectations, and leveraging agile methodologies, Senior Software Engineers can guide their teams to successful project delivery while supporting professional growth within the team.
Infographic showing various Sr Software job openings in Wisconsin as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution.

Senior Software Engineer

Fiserv, Inc.

Milwaukee, WI • On-site

$120K - $159K/yr

Full-time

Re-posted 22 days ago


Fiserv rating

7.7

Company rating: 7.7 out of 10

Based on 95 frontline employees who took The Breakroom Quiz

105th of 150 rated financial services


Job description

Calling all innovators - find your future at Fiserv.
We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
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 authorization from management)
DUTIES: Deliver enterprise grade financial transactions processing solutions tailored to the Payments industry. Collaborate with stakeholders to gather business requirements and translate them into technical specifications and detailed design documents. Design, code, and integrate new functionalities into existing systems as well as build new systems using cutting edge technologies while adhering to industry standards and security protocols. Ensure the quality of software deliverables through rigorous code reviews, implementing best practices in coding, and addressing production challenges promptly. Work closely with QA teams throughout the testing phase and resolve any identified issues in a timely manner. Actively participate in project meetings and sprint planning sessions, ensuring stakeholders are updated on project progress, timelines, and any dependencies. Ensure compliance with necessary network certifications to meet industry regulations and standards. Manage application deployments, ensuring that new releases are executed smoothly without disrupting existing services. Collaborate with global teams to develop effective solutions that align with business objectives.
REQUIREMENTS: Bachelor's degree in Computer Science, Engineering, or a related field and 4 years in any job title involving software development experience in Credit and Debit payment processing. Prior experience must include 4 years in the following: Working with object-oriented languages, distributed systems, AWS and GCP services; Building high availability and highly scalable payment processing applications; Working in .NET, C#, REST APIs, and Microsoft SQL; Working with Agile methodologies; Working in TCP/IP and Socket Programming; and Working in Asynchronous Multithreaded architecture.
TRAVEL: None
TO APPLY: Apply by selecting "Apply" on this page and following prompts to attach resume and submit.
JOB CODE: KG553
#P3M
It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.
Our commitment to Equal Opportunity:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact AskHR.US@fiserv.com. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv's Disability Accommodation Policy for additional information.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.

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