Lead, UI Developer

FORTNA partners with the world’s leading brands to transform omnichannel and parcel distribution operations. Known world-wide for enabling companies to keep pace with digital disruption and growth objectives, we design and deliver solutions, powered by intelligent software, to optimize fast, accurate and cost-effective order fulfillment and last mile delivery. Our people, innovative approach and proprietary algorithms and tools ensure optimal operations design and material and information flow. We deliver exceptional value every day to our customers with comprehensive services and products including network strategy, distribution center operational design and implementation, material handling automated equipment, robotics and a comprehensive suite of lifecycle services.

At FORTNA, we believe in fostering a workplace that isn't just a job but a movement – a collective effort to redefine success and transform challenges into opportunities. "Join the Movement" encapsulates our commitment to a workplace culture that thrives on collaboration, celebrates diversity, and empowers every individual to contribute to something greater than themselves. Our Team. Our Passion. Our Approach.

We are seeking a Lead UI Developer with deep expertise in React to lead the design, development, and evolution of modern, scalable user interfaces. This role blends hands-on front-end development with technical leadership, mentoring, and architectural ownership. You will partner closely with Product, UX, and Backend teams to deliver high-quality, performant, and accessible web applications. 80% hands on coding and 20% leadership, and mentoring is required.Key Responsibilities

• Lead the architecture and development of complex UI applications using React and modern JavaScript frameworks
• Serve as the UI technical authority, setting standards for front-end architecture, design patterns, and best practices
• Drive component-based design systems, reusable libraries, and shared UI frameworks
• Collaborate with UX designers to translate designs and prototypes into high-quality, responsive user interfaces
• Mentor and guide UI developers through code reviews, design discussions, and technical coaching
• Ensure applications meet performance, accessibility (WCAG), security, and scalability standards
• Partner with backend and API teams to define clean integration patterns
• Own front-end build pipelines, tooling, and CI/CD integrations
• Lead technical discussions, estimations, and planning for UI initiatives
• Stay current with emerging UI technologies and recommend adoption where appropriate

Required Qualifications

• 7+ years of professional UI / front-end development experience
• 4+ years of deep hands-on experience with React
• Strong proficiency in JavaScript
• Experience with modern state management solutions
• Expertise in responsive design, cross-browser compatibility, and accessibility standards
• Experience building and maintaining design systems and reusable component libraries
• Solid understanding of REST APIs
• Strong experience with front-end testing frameworks (Jest, React Testing Library)
• Familiarity with modern build tools
• Excellent communication and leadership skills
• Responsible for driving consistency and quality in the Fortna Software UI using React, VITE, and React-Router
• Update and maintain design system components for use across applications.
• Experience with Android Studio development a plus.
• Working knowledge of Docker and Kubernetes strongly encouraged.
• Experience working with and leading globally dispersed teams.
• Experience with Cursor or other AI agentic tools.
• Must be able to document and create sequence diagrams and other supporting documentation for ADRs
• Understanding of Micro-frontend Architecture principles and build patterns
• Understanding of Agile Methodologies including SAFe

Preferred Qualifications

• Experience with Next.js or other React-based frameworks
• Familiarity with Micro-Frontend architectures
• Experience with UI performance optimization and profiling
• Exposure to Agile / Scrum development methodologies
• Experience working in large-scale, enterprise applications
• Knowledge of Warehousing and modern warehouse workflows
• Familiarity with User Experience for Touchscreen and other high volume repetitive operations
• Ability to pick up and maintain legacy code bases as needed.
• Experience with Java, SQL, messaging frameworks a plus.

The base salary range for this role is $115,900 to $173,800. This base salary range represents the low and high end of the base salary range for this position. Actual base salary offered will vary based on various factors including but not limited to location, level, job-related knowledge, skills, experience, and performance.