Mid Level Mastercard Software Engineer Jobs in Brookfield, WI

We are looking for a mid-level Full Stack Developer to join our client's team. You will be supporting a portfolio of Finance and HR applications while contributing to cloud modernization initiatives. This role includes full-stack development, application enhancements, API integrations, Azure-based development, and participation in enterprise projects including Payroll Loan Tracker and In-Sync integrations. The ideal candidate is comfortable working across front-end, database, and cloud technologies and collaborating closely with developers and QA throughout the software development lifecycle. The environment offers a mix of application support, new feature development, system integrations, and Azure cloud adoption work.

What You'll Do

• Develop and build new solutions using a variety of technologies including the full .NET stack, JavaScript frameworks, SQL, and PowerShell

• Analyze, design, and refactor business applications to bring them up to current standards

• Partner with aligned QA on automated testing and continuous delivery

• Translate business and functional requirements into technical design in collaboration with project teams

• Identify and implement problem resolutions and perform system and risk analysis

• Maintain integrity of high-level design and architecture through pairing and design/code reviews

• Work with team members and key stakeholders to develop high level project estimates and test plans

• Participate in application reviews to help drive accurate and complete support documentation

• Seek out and apply new technologies and skills through conferences, online training, and participation in user groups

• Participate in lunch and learns and other open learning opportunities

What We're Looking For

• Minimum 3 years of demonstrated experience with the Microsoft stack working across tiers — C#, MVC, ASP.NET, Web API, T-SQL, RESTful services, OAuth 2.0, Azure, and Power BI

• Strong back-end development skills with experience in C# and SQL Server

• Creative problem solver who is automation-focused — success in reducing recurring work and enabling self-service

• Comfortable working in an Agile/Lean development environment and collaborating within and across teams

• Ability to work collaboratively with internal clients, business analysts, project managers, and other developers to elicit requirements and implement solutions

• Quality focused and motivated by small quick wins and process improvement

• B.S. in Computer Science, Computer Engineering, or Software Engineering preferred — equivalent experience also considered

Nice to Have

• Experience with Power Automate, Python, Alteryx, and/or Azure

• Data integration experience

• Experience using GitHub Copilot or another AI tool to support analysis and development work

Job Type & Location

This is a Contract position based out of Milwaukee, WI.

The pay range for this position is $50.00 - $60.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

This is a hybrid position in Milwaukee,WI.

This position is anticipated to close on Aug 31, 2026.

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.