Open to opportunities

Marcos Vinícius Cavalcante

@marcosvinciuscavalca

Message

I build scalable AI-powered backend systems and full-stack products.

Brazil

Message

What I'm looking for

I'm seeking international remote opportunities with teams building AI-powered products, scalable systems, and cloud-native platforms. I value challenging work, cross-functional collaboration, clean architecture, and opportunities to deliver production impact.

I've delivered production AI and telephony features at Thoughtly, including GPT Realtime call screening via WebSockets, voicemail detection, SIP integrations, and access-control systems for AI agents.

At dolado, I co-developed AI agents for marketplace analysis using NestJS, Python, LangChain, and MCP, reducing manual analysis from 20 hours to 15 minutes. I also built presentation-generation and profit-margin systems that cut preparation and analysis time to minutes.

Across fleet management, government, and marketplace platforms, I've modernized legacy systems, designed microservices and event-driven workflows, and improved reliability, performance, and operational visibility with Node.js, Go, Python, AWS, Azure, Kafka, and cloud databases.

Experience

Work history, roles, and key accomplishments

Full Stack Engineer

Thoughtly

Jan 2026 - Jul 2026 (6 months)

- Call Screening Assist: Integrated the GPT Realtime model (gpt-realtime-2) via WebSockets to deliver the Call Screening feature, enabling AI Agents to identify and interact in real time with automated services (screeners) on the callee side in order to bypass them and reach the end user efficiently.

- User Roles & Access Control: Implemented a user roles system across backend and frontend, impro

Microservices Architecture

Backend Engineer

dolado

Jun 2025 - Jan 2026 (7 months)

- Automated Market Analysis with AI Agent: Co-developed an AI Agent for automated marketplace analysis using NestJS, Python, LangChain, and MCP. Reduced manual analysis time from 20 hours to 15 minutes—achieving 98% efficiency improvement. Delivered scalability, cost reduction by 85%, and improved data accuracy for clients.

- Engineered Automated Presentation Generator: Developed presentation gen

Revisão De Código NestJS TypeScript LangGraph Microservices Architecture

Full Stack Engineer

Dersalis

Mar 2025 - Nov 2025 (8 months)

- Implemented Role-Based Access Control: Deployed RBAC on the platform enabling managers to distribute responsibilities according to different positions and duties. Significantly impacted client company operations by allowing proper task delegation across the organization, improving workflow efficiency by 45%. Used Node.js, NestJS, and Azure CosmosDB.

- Developed Proprietary Dashboard Solution: B

Java Node.Js Development Docker NestJS Angular Azure Spring Boot Kotlin Microservices Architecture Kafka

Full Stack Engineer

+SistemasTI

Aug 2023 - Mar 2024 (7 months)

- Legacy System Modernization: Modernized legacy government systems, migrating the architecture to Spring Boot and Laravel

- API Performance Optimization: Optimized MySQL queries within RESTful APIs, contributing to a 40% increase in delivery capacity

Java Laravel Spring Boot PHP

Full Stack Engineer

Show Tecnologia

May 2023 - Mar 2024 (10 months)

- Pioneered Flexible Reporting System: Initiated and led an innovative project enabling unprecedented flexibility in generating reports, forms, and dashboards. This initiative directly enabled the acquisition of new clients, including Brazil's largest transportation company. Utilized Node.js, NestJS, Express, and MySQL.

- Reduced Platform Bugs by 70%: Managed the company's platform management pro