Front-End Software Engineer

Union.ai • Seattle, WA

1d • $170,000 - $190,000 • Hybrid

About The Position

Union is building the orchestration layer for modern AI and ML workloads. We're hiring a Front-End Software Engineer to build intuitive, high-performance experiences on top of complex distributed systems. The surface you own is data-dense and live. Workflow runs stream state as they execute, task lists run long, logs and timelines update in real time, and a customer debugging a failed run needs the console to stay fast and legible while thousands of rows move underneath them. This is closer to building a monitoring or observability console than a marketing site or a CRUD app. You'll work across the Flyte v2 experience, from launching workflows to monitoring runs, debugging failures, managing applications, and onboarding new organizations, in close partnership with product, design, backend, infrastructure, and customer teams. This role is hybrid, based out of our Seattle office.

Requirements

• 3+ years of professional experience building modern web applications.
• Strong experience with React, Next.js, and TypeScript.
• Hands-on work with real-time data, infinite scrolling, virtualization, complex state, or high-volume datasets. This is the part of the job that's hard to fake.
• A real understanding of front-end architecture and performance optimization.
• Experience with modern build tooling such as Vite or Webpack.
• A bias toward simple, reliable, maintainable code and thoughtful user experiences.
• Clear communication and effective collaboration across teams.
• A bachelor's degree in computer science or equivalent professional experience.

Nice To Haves

• Workflow orchestration, developer tools, cloud infrastructure, or distributed systems.
• Kubernetes, containers, gRPC, protobuf, or data visualization.
• Flyte, Ray, Spark, SageMaker, or similar AI and ML platforms.
• Working directly with enterprise customers.

Responsibilities

• Build and maintain a modern React and Next.js application in TypeScript.
• Develop features across Run Details, Actions, Apps, Settings, workflows, and onboarding.
• Implement complex UI patterns including infinite scrolling, virtualization, real-time updates, streaming, and timelines.
• Build interactive data tables with sorting, filtering, pagination, and efficient rendering at volume.
• Create reusable, responsive components using Tailwind CSS, Headless UI, and our design system.
• Work with gRPC and Connect APIs and protobuf for type-safe data communication.
• Use TanStack Query and Zustand for server and client state management.
• Collaborate with backend engineers to influence API design and deliver cohesive features.
• Contribute to front-end architecture, technical decisions, testing, and performance improvements.
• Work directly with customers to understand problems, debug issues, and improve the product.

Benefits

• Excellent medical - We pay 100% of your premiums and 90% for your dependents
• Generous dental and vision plans- We pay 90% of the premiums for you and your dependents
• Meaningful equity in the form of options – all employees are owners here
• Unlimited time off + 12 company holidays
• 401K match - Union.ai matches 100% of contributions up to the first 3%, and 50% up to 5%
• 12 weeks paid parental leave for primary and secondary caregivers
• Flexible work schedule (some restrictions apply)
• For in office employees: Lunch provided onsite and well stocked kitchen with snacks and drinks.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level