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Full Stack Developer
<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>
• Minimum of 5 years of experience as a mid-to-senior level developer.<br>• Proficient in TypeScript with a strong understanding of its application in development.<br>• Extensive experience with .NET framework, including versions 4.6 and newer.<br>• Familiarity with legacy .NET applications and the ability to work effectively in such environments.<br>• Experience with Python and a willingness to work within Python-based systems.<br>• Strong understanding of Agile or SAFe development frameworks.<br>• Proven ability to maintain and enhance enterprise systems.<br>• Expertise in debugging and troubleshooting complex application environments.
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  • 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>
  • 2026-03-11T00:00:00Z

Full Stack Developer Job in Middleton, WI | Robert Half