Sr. Frontend Software Engineer, Labs

About the Role 

At Pax8 Labs, we’re inventing the future of how businesses interact with autonomous technology—not just making AI possible, but making it practical, intuitive, and transformative. As a Frontend Engineer, you’ll craft the user-facing experiences that make complex AI-driven workflows accessible and trustworthy. You’ll design and build novel interfaces that enable real-time visualization, seamless human-AI collaboration, and intuitive control across diverse environments. 

This is greenfield engineering in an innovation hub where speed, experimentation, and bold ideas drive everything we do. You’ll tackle today’s hardest UI challenges while helping define the foundation for future projects and breakthrough technologies—from new interaction models to entirely new product lines. 

If you’re passionate about pioneering technology and want to help build a culture of innovation and future-focused projects, we want you—even if you don’t check every box. Diverse perspectives fuel our breakthroughs, so bring your curiosity and creativity. 

What You’ll Do 

• Build responsive, intuitive interfaces for complex AI-driven workflows and coordination systems. 

• Create high performance real-time visualizations that communicate agent status, progress, and decision-making processes to non-technical users. 

• Design and implement user interfaces that make autonomous systems feel predictable and trustworthy. 

• Develop interactive dashboards and controls for managing multiple agents and their workflows. 

• Build reusable UI component libraries optimized for agent-based interactions and future Labs projects. 

• Continuously evaluate emerging frontend technologies and prototype solutions for next-generation platforms. 

• Shape team culture by championing experimentation, knowledge sharing, and fostering creativity and growth. 

Labs Culture & Work Style 

• Modern Development: Embrace AI tools where they add genuine value, from coding assistance to automated testing 

• Async-First Communication: Thoughtful documentation (Slack, Notion, Loom), with focused in-person collaboration 1-3 days per week in our Denver office 

• Build-Measure-Learn: We learn through iteration and support each other in experimentation 

Who We’re Looking For 

• Experience building modern frontend applications using frameworks such as React, Vue, or similar (we value skills over years) 

• Experience with TypeScript, modern CSS, and responsive design principles 

• Ability to create complex, richly interactive, and high-performance interfaces using SVG, Canvas, or WebGL. Able to explain the differences between them, and rationale behind choosing one over another. 

• Experience with real-time updates, WebSocket connections, and managing dynamic application state 

• Knowledge of frontend performance optimization and handling large datasets in the browser 

• Familiarity with design systems and component libraries, and working closely with designers 

• Exposure to AI-powered applications, conversational interfaces, or workflow visualization is a plus 

Other Qualities We Value 

• Strong attention to visual design and user experience details 

• Experience building interfaces for complex technical products or enterprise software 

• Enthusiastic about micro-interactions and using animation to enhance a user experience 

• Collaborative approach to working with UX designers and cross-functional teams 

• Commitment to code quality, accessibility standards, and performance optimization 

• Enthusiasm for emerging frontend technologies and AI/ML advancements 

• Thrives in environments that value rapid learning and iteration, balancing prototyping with scalable architecture 

• Understanding of human-AI interaction patterns and autonomous system interfaces is a plus 

• Degree or equivalent practical experience in Computer Science, Engineering, or related field 

What Success Looks Like 

First 90 Days: Help build initial prototypes and innovate, establish development practices, and integrate successfully with the team 

First Year: Deliver intuitive, scalable interfaces that make complex agent systems accessible to non-technical users 

Our Values 

• Compassionate Candor - Assist others with candid, actionable feedback 

• Seek to Understand - Be open, curious and committed to learning 

• We Before Me - Collaborate and seek diverse perspectives for Team Pax8 wins 

• Do What You Say - Take ownership, honor commitments, prioritize and deliver 

• Light Up Learning - Try new ideas, be vulnerable, share failures for collective learning 

• Driven by Passion - Connect personal passion to Pax8 mission, stay resilient 

Why Join Pax8 Labs 

• UX Challenge: Pioneer human-AI interaction interfaces in largely uncharted territory, solving novel visualization and control problems 

• Pioneering Territory: Work at the forefront of agent interface design in a rapidly evolving space 

• Massive Scale: Your interfaces will reach thousands of partners through Pax8's established marketplace platform 

• Greenfield Engineering: Build frontend systems from scratch with modern technologies and no legacy constraints 

• Strong Backing: Executive support and autonomy to build breakthrough user experiences 

• Exceptional Team: Work alongside our Technical Fellow, Engineering Manager, and experienced UX design professionals 

Compensation: