Nicolas Lopes Email & Phone Number

San Francisco Bay Area

Remote

X-team is an outsourcing company, and I've been working there with many technologies and clients. The main Stack: AWS, NodeJS, Typescript, React, GraphQL, SQL/NoSQL Databases, and Microservices.BetasharesBetashares helps Australians build their wealth. Established in 2009, Betashares is a leading Australian fund manager, with a focus on exchange traded funds (ETFs).At Betashares I work with Vue, Nuxt, GraphQL, Typescript, Terraform, Kubernetes, Go and Rust building a brand new product with a lean and fast team.Internal Project:I recently joined on the Xteam internal project, I'm mostly developing UI features and performance improvements. I'm using the same stack of React and Node with Typescript.Made RenovationAt Made Renovation, we were delivering seamless bathroom renovation services through a tech stack ofNodeJS, Typescript, React, Postgres, AWS, and GraphQL. There I:▪ Introduced solutions, including a template/workflow mechanism using CRDT for collision-free dataupdates, an SLA estimation engine, and a Side Effects engine for 3rd party integrations with anevent-driven architecture.▪ Implemented a query batching mechanism to optimize performance and avoid request overload,significantly reducing database queries.▪ Designed an event-driven architecture, unifying product operations through Schema Federation and the gateway pattern for enhanced API accessibility.▪ Enhanced system Developer Experience (DX) by introducing SWC as a bundling solution, resulting in a 40% build time reduction and faster hot reloads. Initiated a testing movement, achieving a 70% coverage rate, significantly reducing regression issues and expediting the feature delivery process without the need

Remoto

Worked on a system which process our whole financial flow, needing to deal with a huge amount of data and manage complex operations on database. Node, SQS, PostgreSQL, Kafka

Evermart is a platform which enables creators to effortlessly sell their products, providing a checkout system and a dedicated member's area for storing videos and ebooks—a platform akin to Hotmart and Kiwify. There I:▪ Oversaw the design and development of a mobile application for the company, utilizing React Native, Typescript, and Styled Components with Expo Bare Workflow.▪ Designed a new public API and implemented a webhook system to send it over for clients and external provides all the events related to their checkout. From facebook pixel analytics to order statuses.▪ Provided crucial support for Front-End development by addressing bugs and optimizing UX in collaboration with Front-End teams.▪ Implemented a circuit breaker architecture to manage external payment services, enhancing security.

Brazil

Buxoxei was a food delivery app, there I:▪ Led the definition of system architecture components and implemented data modeling to enhance uniformity, reducing overall complexity significantly.▪ Executed Supploped tread and strategic development approaches to navigate complex business scenarios, ultimately enhancing operational efficiency for clients.▪ Actively collaborated with clients to gather feedback and addressed Front-End performance issues using React, Redux, React Native, and Expo.▪ Improved User Experience by optimizing PostgreSQL database queries, resulting in a 60% increase in order processing speed.▪ Researched and implemented database locks (page predicate lock) and adjusted isolation levels in critical transactions to enhance security.▪ Developed a Back-End for Front-End (BFF) using GraphQL and data loaders to overcome performance issues within an internal system.▪ Created an application using GraphQL, TypeScript, and a circuit breaker architecture to notify restaurants of new orders and facilitate transactions.After some time we pivote from the delivery app to a software house, there I:▪ Successfully led two teams concurrently in the development of mobile applications for a barbershop and a water distribution map, adhering to best practices and Clean Code principles.▪ Engineered an API for an E-commerce platform, employing a Serverless Event-Driven architecture with technologies such as Node, TypeScript, SQS, SNS, and Lambdas, resulting in improved performance.▪ Incorporated client feedback to enhance UI/UX, collaborating closely with the design team to prioritizeengaging experiences and user-friendly interfaces.▪ Implemented CI/CD pipelines on GitHub Actions to automate the building, testing, and deploymentprocesses of applications on AWS.▪ Designed and constructed an admin dashboard for the water distribution application, incorporatingfeatures such as image uploads, maps, and high-contrast colors to cater to the visually impaired.