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Analyze credit policies and model Net Present Value (NPV) for a fintech’s credit card product using SQL and data-driven strategies to balance growth and risk.
Analyze and model credit policies for Stone’s credit card product, balancing growth and risk using SQL, NPV, and A/B tests to optimize approval, pricing, and portfolio performance.
Designs and refines payment-product interfaces, ensuring consistency via the Design System while leading discovery, stakeholder alignment, and conversational-AI prompt engineering for customer-facing flows.
Designs and refines user-facing financial-product interfaces, applying research and a design system to shape consistent, high-impact experiences across multiple products and stakeholder needs.
Builds and maintains Go-based payment services and integrations for Brazilian merchants, working with relational databases, APIs, and event-driven systems.
Builds and maintains mobile apps for Brazilian merchants, focusing on Kotlin Multiplatform and Compose Multiplatform to share UI and logic across Android, iOS, and React Native.
Manage a team of database specialists to ensure reliability, performance, and security of Stone’s financial transaction systems using SQL Server, PostgreSQL, MongoDB, and cloud platforms.
Mid-level Android Software Engineer on Stone's POS app, owning critical payment and NFC-e flows using Kotlin, Jetpack Compose, Clean Architecture, and offline-first patterns.
Senior Software Engineer developing and maintaining critical Go-based microservices at Stone, Brazil's largest independent payments company.
The Product Manager at Stone manages the full product lifecycle, collaborating with engineering and design to deliver financial solutions. The role focuses on credit guarantees and card receivables, requiring strong data analysis skills and experience with market registrars.
Develops and maintains Android SDKs, apps, and libraries for Stone’s POS devices, focusing on architecture, performance, and continuous improvement of CI/CD and testing pipelines.
Develop and maintain high‑impact, 24/7 financial transaction and accounting services, implementing features, performance optimizations, and distributed system architecture using Elixir/OTP, Phoenix, Go, PostgreSQL, Kafka, RabbitMQ, and Docker.
Specialist-level AI Conversation Designer at Stone, a Brazilian payments fintech. Day to day: architecting complex multichannel conversational flows and journeys, defining guidelines, metrics and governance for AI experiences, and mentoring other conversation designers using LLMs, NLP and generative AI tools like Gemini.
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