Wanderson Chaves

Working on backend modernization and production delivery for mission-critical Oil & Gas applications serving Petrobras.
• Led a three-engineer team through the end-to-end modernization of three legacy Python/Django applications to Python 3.12 and Django 4.2, defining architecture, allocating work, reviewing implementations, and coordinating delivery.
• Implemented the application-side components r

Concurrent fixed-term contract engagement focused on payment systems and backend integrations.
• Designed and released Pix and BolePix payment methods using NestJS, TypeScript, Prisma, PostgreSQL, and Celcoin APIs.
• Built split-payment workflows and production webhook processing for Pix-related transaction lifecycles.
• Integrated external payment APIs and implemented backend components supportin

Worked on backend services for a customer-operated multi-tenant platform serving active accounts across healthcare and education.
• Built multi-tenant backend services using NestJS and MongoDB, supporting isolated application contexts across different customer accounts.
• Developed Dialogflow intents, fulfillment logic, webhooks, integrations, and conversational flows for customer-facing chatbot e

• Developed catalog, order, payment, inventory, and administrative modules for an e-commerce platform delivered to a Nicaraguan company.
• Implemented backend functionality with Node.js and contributed to the application interface using Angular.
• Worked on core commerce workflows involving product management, orders, payments, inventory, and administrative operations.

• Built features and React components for a legal analytics platform that consumed outputs from AI components.
• Implemented GraphQL queries, mutations, and resolvers used by the frontend application.
• Contributed to backend and frontend development using Python, Node.js, React, and GraphQL.
• Supported the delivery of new functionality for a platform focused on legal-process analytics.

• Contributed to migrating legacy PHP functionality to a new Node.js and React stack.
• Developed features for an accounting system used by client businesses.
• Supported the gradual modernization of legacy application functionality across backend and frontend components.

Completed Rocketseat’s Ignite program, a practical specialization focused on modern application development with JavaScript and TypeScript technologies.

Areas covered included:

• Backend API development with Node.js and TypeScript
• Application development with React and React Native
• Database integration and application architecture
• Testing, authentication, deployment, and development workfl

Completed a higher education technology degree focused on software development, systems analysis, database fundamentals, requirements analysis, and the software development lifecycle.

Core areas included:

• Programming fundamentals and object-oriented programming
• Systems analysis and requirements modeling
• Relational databases and SQL
• Software development methodologies
• Software design and

Completed technical training covering computer fundamentals, operating systems, hardware, networking concepts, IT support, and introductory programming.