8 ui engineer jobs at 5 companies in Belleville, IL

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UI/UX Developer / Active Secret
Scott Air Force Base, Illinois, United States
$66k-$106k/yr HybridFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
2+ YOE2 years' relevant UI/UX development experience with BS/BA (or HS + 6 years), active DoD Secret clearance, U.S. citizenship, strong communication and collaboration; Palantir Foundry and Python/PySpark preferred.
Palantir Foundry, Python, PySpark
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UI/UX Developer / Active Secret
Scott AFB, Illinois, United States
$66k-$106k/yr HybridFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
2+ YOEU.S. citizen with active DoD Secret clearance. 2 years relevant experience with a BS/BA (or HS + 6 years). Experience developing enterprise-level UI/UX solutions, collaborative mindset, and strong communication skills.
Palantir Foundry, Python, PySpark
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Mid-level UI/UX Developer / Active Secret
Scott AFB, Illinois, United States
$80k-$128k/yr HybridFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
3+ YOE3+ years experience (MS/MA) or 5+ years (BS/BA) developing enterprise UI/UX; U.S. citizenship and active DoD Secret clearance required; strong communication, collaboration, and creative problem-solving.
Palantir Foundry, Python, PySpark
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Mid-level UI/UX Developer / Active Secret
Scott Air Force Base, Illinois, United States
$80k-$128k/yr HybridFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
5+ YOEU.S. citizen with active Secret clearance; minimum 5+ years relevant experience with BS/BA (3+ with MS) or equivalent; enterprise UI/UX development experience; strong communication and collaboration; local to Scott AFB with flexible remote work.
Palantir Foundry, Python, PySpark
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Senior Agentic AI UI Devleoper
Springfield or Saint Louis
$148k-$267k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
10+ YOE10+ years software development; 5+ years web services/UI; BS in CS or related field; JavaScript and Python; RESTful APIs; XML/Java; Secret clearance; Python and AI integration experience.
JavaScript, Python, REST, XML, Java, React, Vue, Angular
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Machine Vision Engineer
Bridgeton, Missouri, United States
OnsiteFull Time
Hunter Engineering
Hunter Engineering: Designs and manufactures automotive service and inspection equipment.
3+ YOEBachelor's in Electrical or Computer Engineering, 3+ years developing electronics and software for machine vision, experience with image processing, 3D geometry, board-level design, embedded C/C++, and application/UI development.
C, C++, Microsoft Visual Studio
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Senior Developer
St. Louis, Missouri, United States
OnsiteFull Time
Rapsodo
Rapsodo: Provides portable sports performance tracking and analytics devices.
8+ YOEBachelor’s or Master’s in CS/Engineering; 8+ years mobile development (Android/iOS); 3+ years Kotlin Multiplatform; strong architecture, KMP, and cross-platform data/UI design; CI/CD; device-connected apps; AI-assisted development experience.
Kotlin, Kotlin Multiplatform, Android, iOS, SwiftUI, Jetpack Compose, Gradle, CI/CD, Dependency Injection, BLE, Wi-Fi, TCP, KMP-iOS interoperability
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Software Engineer - Frontend
Florissant, Missouri, United States
OnsiteFull Time
Augustine Institute
Augustine Institute: Provides Catholic theological education and media for faith formation.
Extensive experience building frontend architecture and design systems; React/Next.js web, React Native/Expo mobile; UI/UX optimization; scalable deployments; AI/SEO integration.
React, Next.js, React Native, Expo, Tailwind CSS, LaunchDarkly, New Relic, Mixpanel, Mux, Cloudflare Pages, Vercel, AWS Amplify, ECS, Fargate, EC2, S3, CloudFront, AI/SEO tooling