VAAS

Senior Frontend Developer (React)

In short

Senior Frontend Developer (React/TypeScript) building interfaces to configure, publish, monitor, and review AI agents, with a focus on real-time execution views and human approval flows. The role involves streaming and recovery states, typed backend integration via tRPC, design-system development with accessibility, and large-list and graph performance, plus automated component and end-to-end testing. Clear written Portuguese and technical English reading are required; the position is hybrid in Brazil.

About the Role
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.
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
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
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
Hiring Process
Application → screening → HR cultural-fit conversation → technical interview with managers → final interview with directors → offer

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