Sr. Software Engineer – UI Developer (React)

About the Role

Location: Northfield IL

We are seeking a highly experienced Sr. Software Engineer UI Developer to lead the design and implementation of scalable resilient and high-performance applications. This role is pivotal in modernizing e-commerce platform integrating with cutting-edge SaaS solutions and ensuring systems are designed for resiliency reliability and operational excellence. As a senior team member you will drive technical design decisions mentor junior developers and embed Site Reliability Engineering (SRE) best practices into our workflows.

Key Responsibilities

1. Front-End Development Leadership

• Lead the design and development of responsive dynamic and cloud-native front-end applications using React and
• Architect and implement server-side rendering (SSR) solutions for optimal performance and SEO compliance.
• Utilize Cloudflare for CDN edge computing and security to enhance application delivery and reliability.

2. Cloud-Native Development

• Build deploy and manage applications using Azure services like Azure App Services Azure Front Door and Azure Static Web Apps.
• Integrate front-end applications with Azure PaaS offerings such as Azure API Management Azure Functions and Azure Redis Cache.
• Drive adoption of modern front-end patterns including Micro Front-End Architectures (e.g. Single SPA Module Federation).

3. Performance Optimization and Security

• Optimize application performance through caching lazy loading and content delivery techniques.
• Implement secure designs and protocols (OAuth2 OpenID Connect) to protect applications and data.
• Monitor and resolve issues using Azure Monitor Cloudflare analytics and similar tools.

4. Continuous Improvement and Support

• Stay current with emerging trends in front-end and cloud-native development.
• Contribute to Agile ceremonies and promote a culture of continuous improvement within the team.
• Support production applications and ensure high availability by participating in on-call rotations as needed.

Core Requirements

• Front-End Development:
• 10 years of hands-on software development experience with 6 years in cloud-native architecture.
• Advanced expertise in JavaScript TypeScript React (16).
• Proficiency with SSR frameworks like or .
• Strong knowledge of HTML5 CSS3 SCSS and responsive design principles.

• Azure Expertise:
• Extensive experience with Azure App Services Azure Front Door Azure CDN and other Azure PaaS offerings.
• Hands-on experience with Azure DevOps for CI/CD pipeline creation and automation.
• Cloudflare Knowledge:
• Deep understanding of Cloudflare Workers caching strategies DDoS protection and WAF (Web Application Firewall).
• API Integration:
• Proficiency in interfacing with RESTful APIs and GraphQL services.
• Leadership Skills:
• Demonstrated ability to mentor and lead teams in technical implementations.
• Strong communication skills to drive alignment across technical and business stakeholders.

Preferred Skills

• Familiarity with build tools like Webpack Vite npm or yarn.
• Understanding of accessibility standards and best practices (WCAG).
• Experience with containerization tools like Docker and orchestration with Kubernetes.
• Knowledge of Agile/Scrum methodologies and CI/CD best practices.