Application Engineer (Senior)

We’ve built a culture rooted in our Core Values, where innovation thrives, work-life balance is respected, and career growth is always encouraged. We’re also proud to be recognized as a ‘Top Workplace,’ and that’s not just us talking; it’s our employees. Now, we’re looking for another Uncommon Genius to join our dynamic team. If you love solving puzzles, building new things, fixing what’s broken, or pushing the boundaries of creativity, we encourage you to explore the details of this position below! UNCOMN is seeking a Application Engineer (Senior, Software Developer 4) to:

• Develop, refactor, and support application services used in modernization efforts across cloud and hybrid environments.
• Implement business logic, APIs, integration points, and supporting components based on approved designs and requirements.
• Troubleshoot application issues and improve reliability, performance, and maintainability across environments.
• Work closely with architects, platform engineers, testers, and analysts to deliver production-ready software changes.
• Support source control, build, deployment, and release practices aligned with team standards and client requirements.
• Contribute to technical documentation, peer reviews, and solution quality throughout the delivery lifecycle.

Do you have experience in Systems integration?, * 8+ years of related experience.

• Bachelor’s degree in engineering, Computer Science, CMIS, or a related field from an accredited college or university, or 4 additional years of related experience.
• Hands-on application development experience with modern software engineering practices.
• Experience building or supporting service-based applications, APIs, and application integrations.
• Ability to troubleshoot defects, analyze root causes, and implement durable fixes.
• Experience working within structured development workflows that include code review, testing, and controlled release.
• Strong communication and collaboration skills in cross-functional delivery teams.
• Must be eligible to obtain a Secret clearance or similar, granted by the U.S. Government, which requires U.S. citizenship. The government also uses 13 adjudicative guidelines to determine an individual’s eligibility.
• Must be willing to obtain relevant certifications as required by future client or contract needs.

Preferred

• Experience with Java or Spring-based application development.
• Experience supporting AWS-based applications, containerized services, or CI/CD-driven delivery.
• Exposure to modernization work in regulated or mission-critical environments.
• Candidates local to the St. Louis Metro East market/within commuting distance preferred, although not required.

4.74.7 out of 5 stars St. Louis, MO 63101 $97,000 - $125,000 a year, Pulled from the full job description

• Health insurance
• 401(k) matching
• Paid time off
• Employee assistance program
• Paid holidays
• Benefits from day one, * Instant Flexible PTO: Enjoy flexible paid time off starting your very first day with us!
• Generous Holidays: Benefit from 7 paid holidays and up to 3 floating holidays annually.
• Immediate Health Coverage: Get access to comprehensive health benefits from day one.
• 401K Safe Harbor Match: Secure your future with our top-tier 401K matching program.
• Growth Opportunities: Advance your career with our training and education assistance programs.
• Free Employee Assistance Program (EAP): Access complimentary support services for you and your family.