Senior Frontend Developer React

You will create interfaces for configuring, publishing, monitoring, and reviewing AI agents. You will display real-time executions and evidence, support human approval flows, handle streaming and recovery states, evolve the design system, integrate typed backend data, and deliver component and end-to-end tests.

Responsibilities

• Build interfaces to configure, publish, and monitor AI agents
• Visualize agent execution stages, consumption, and real-time progress
• Build human review and approval flows
• Present decisions and evidence clearly
• Handle streaming, partial states, errors, and recovery states
• Evolve accessible and consistent design-system components
• Integrate with the backend through tRPC and shared types
• Write component and end-to-end tests
• Collaborate on interface specifications and decisions

Requirements

• Strong production experience with React and TypeScript
• Experience with server state and caching using TanStack Query or equivalent
• Experience building accessible design systems with tokens and composition
• Experience with real-time data, streaming, SSE, or WebSocket
• Accessibility and large-list and graph performance expertise
• Automated component and end-to-end testing experience
• Rigorous use and review of coding agents
• Clear written Portuguese and technical English reading

Benefits

• 30 days of paid leave after one year
• Caju meal and transportation allowance for hybrid or onsite workers
• Wellhub
• Conexa telemedicine and Psicologia Viva
• Two monthly nutritionist appointments
• Two monthly psychologist appointments
• Discounted general practitioner and specialist telemedicine appointments
• Dasa exam discounts of more than 15%
• Pague Menos pharmacy discounts of 20% to 30%
• Free parking
• Birthday-month day off