React Js Frontend Jobs in Missouri (NOW HIRING)

Job Summary:
The Augustine Institute seeks a Senior Frontend Engineer to design, build, and maintain the user-facing experiences across its digital platforms. This role is primarily responsible for establishing foundational front-end architecture and design systems for customer-facing platforms, setting code-level implementation standards, and working closely with Product to deliver high-quality, consistent UI experiences across the Augustine Institute’s portfolio of brands.
Responsibilities:
• Building, implementing, and maintaining front-end architecture and design systems that yield consistent UX interactions and high-quality UI aesthetics
• Iterative development and designing experiences behind feature flags for graduated rollout and testing
• Data-driven approaches to optimizing user experiences across multiple applications
• React + Next.js for web development
• React Native + Expo for mobile development
• Tailwind CSS
• Building multi-profile / sub-account experiences (e.g., family, organization, and children’s profiles)
• Deploying front-end code at enterprise and multi-hundred-thousand user scale (e.g., Cloudflare Pages, Vercel, AWS Amplify, ECS/Fargate, EC2, S3 + CloudFront)
• Managing llms.txt standards and designing with AI discoverability (“AI SEO”) in mind alongside traditional search SEO
• Ability to think cross-product, creating unique experiences for each brand (Formed, Amen, etc.) while sharing the same underlying core elements that make it feel like “the Augustine Institute”
• Ability to design UX/UI across distinct use cases built on the same core platform, adapting to different user contexts and personas
• Ability to understand when users need onboarding support and design in-app guides accordingly
• Experience maintaining UI code and documentation that enables both human collaboration and AI-assisted development, while ensuring AI adheres to design system and architectural standards
• Strong ability to perform quality assurance and security testing on all front-end code
• Ability to identify when niche specialists are needed and effectively delegate work to contractors, ensuring output meets quality standards and includes sufficient knowledge transfer for ongoing in-house maintenance
Qualifications:
Required:
• Significant, demonstrable, and proven experience in building, implementing, and maintaining front-end architecture and design systems that yield consistent UX interactions and high-quality UI aesthetics
• Significant, demonstrable, and proven experience in iterative development and designing experiences behind feature flags for graduated rollout and testing
• Significant, demonstrable, and proven experience in data-driven approaches to optimizing user experiences across multiple applications
• Significant, demonstrable, and proven experience in React + Next.js for web development
• Significant, demonstrable, and proven experience in React Native + Expo for mobile development
• Significant, demonstrable, and proven experience in Tailwind CSS
• Significant, demonstrable, and proven experience in building multi-profile / sub-account experiences (e.g., family, organization, and children’s profiles)
• Significant, demonstrable, and proven experience in deploying front-end code at enterprise and multi-hundred-thousand user scale (e.g., Cloudflare Pages, Vercel, AWS Amplify, ECS/Fargate, EC2, S3 + CloudFront)
• Significant, demonstrable, and proven experience in managing llms.txt standards and designing with AI discoverability (“AI SEO”) in mind alongside traditional search SEO
• Bachelor’s degree or equivalent practical experience
• Ability to think cross-product, creating unique experiences for each brand (Formed, Amen, etc.) while sharing the same underlying core elements that make it feel like 'the Augustine Institute'
• Ability to design UX/UI across distinct use cases built on the same core platform, adapting to different user contexts and personas
• Ability to understand when users need onboarding support and design in-app guides accordingly
• Experience maintaining UI code and documentation that enables both human collaboration and AI-assisted development, while ensuring AI adheres to design system and architectural standards
• Strong ability to perform quality assurance and security testing on all front-end code
• Ability to identify when niche specialists are needed and effectively delegate work to contractors, ensuring output meets quality standards and includes sufficient knowledge transfer for ongoing in-house maintenance
• Commitment to demonstrate consistently the Augustine Institute’s core values including: Humility, Collaboration, Innovation, Excellence
Preferred:
• Experience with LaunchDarkly or similar feature-flag tools
• Experience with New Relic or similar observability and monitoring tools
• Experience with front-end tracking tools such as Mixpanel
• Experience with video infrastructure integration (Mux or similar) in the front end
• Experience designing group or family-based features including shared experiences and watch parties
• Experience with Learning Management System (LMS) platforms and their core UI components
Company:
The Augustine Institute exists to help Catholics understand, live, and share their faith Founded in 2005, the company is headquartered in Greenwood Village, USA, with a team of 51-200 employees. The company is currently Growth Stage.