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2 results for Back End Developer Payment Integration in Madison, WI
- Middleton, WI
- remote
- Temporary
- 45 - 52 USD / Hourly
- <p>We are seeking a <strong>Mid–Senior Level Full Stack Developer</strong> to support and maintain a suite of existing enterprise applications. This role will focus on <strong>stabilizing, upgrading, and maintaining legacy systems</strong> that are currently in “keep the lights on” mode.</p><p>These applications will eventually be sunset, so the work will primarily involve <strong>maintenance, upgrades, and support of existing functionality rather than new product development or greenfield engineering.</strong></p><p>The ideal candidate is comfortable working within <strong>established systems</strong>, addressing <strong>technical debt, upgrades, and out-of-support components</strong>, and collaborating in an <strong>Agile environment</strong>.</p><p>Key Responsibilities</p><ul><li>Maintain and support existing enterprise applications</li><li>Implement <strong>system upgrades and updates</strong> to ensure applications remain stable and secure</li><li>Address <strong>out-of-support technologies and compatibility changes</strong></li><li>Troubleshoot and resolve issues in legacy application environments</li><li>Participate in <strong>Agile / SAFe ceremonies</strong>, including stand-ups, ticket management, and story refinement</li><li>Collaborate with development teams to ensure continuity of application functionality</li><li>Contribute primarily to <strong>back-end development</strong>, while still supporting full stack functionality as needed</li></ul><p>Required Qualifications</p><ul><li><strong>Mid–Senior level developer experience</strong> (not a Lead or Architect role)</li><li>Strong experience with <strong>TypeScript</strong></li><li>Strong experience with <strong>.NET (4.6 – current versions)</strong></li><li>Experience working with <strong>legacy ASP.NET applications</strong></li><li>Experience with <strong>Python</strong> (some flexibility; willingness to work in Python environments)</li><li>Experience working within <strong>Agile or SAFe frameworks</strong></li><li>Ability to maintain and enhance <strong>legacy or enterprise systems</strong></li></ul><p>Nice to Have</p><ul><li>Experience modernizing or supporting <strong>applications approaching end-of-life</strong></li><li>Strong debugging and troubleshooting skills in complex environments</li><li>Experience working on <strong>backend-heavy workloads within full stack applications</strong></li></ul><p><br></p>
- 2026-03-09T00:00:00Z
- Madison, WI
- onsite
- Permanent
- 110000 - 130000 USD / Yearly
- <p>Robert Half is seeking a Senior Software Developer to help design, build, and support business-critical applications for our client in the Madison area. This role focuses on developing reliable, scalable software systems used directly in production environments.</p><p><br></p><p>You’ll work closely with a small, experienced engineering team supporting applications where uptime matters and problems need real solutions. We’re looking for someone who can think creatively during design, stay focused during execution, and take ownership when systems need attention.</p><p><br></p><p><strong>This is a remote position for Wisconsin based candidates only.</strong></p><p><br></p><p><strong>What You’ll Do:</strong></p><ul><li>Design, develop, and maintain core business applications supporting manufacturing operations</li><li>Build backend and full-stack solutions using modern .NET technologies</li><li>Develop and support applications hosted in Azure, including Azure SQL–backed systems</li><li>Troubleshoot production issues and participate in root-cause analysis to improve system stability</li><li>Collaborate with engineering and business partners to deliver practical, reliable solutions</li><li>Participate in occasional production cutovers or off-hours support (infrequent, typically a few times per year)</li><li>Contribute to application architecture and continuous improvement efforts</li><li>Explore opportunities to incorporate AI capabilities into applications as the organization defines its roadmap</li></ul><p><br></p>
- 2026-02-12T00:00:00Z