Lucas Victor Ferreira

I’m a Backend Software Engineer with 3 years of experience building REST APIs, microservices, and high-availability distributed systems using Node.js, TypeScript, Java, and Golang. My Chemistry background shapes how I approach problems: rigor, experimentation, and continuous improvement. I enjoy turning complex requirements into reliable systems that perform under real-world load.

In my current role at Banco BV (via Act Digital), I develop and maintain REST APIs with Java 11, 17 & 21 (Spring Boot) for financial fraud prevention. I integrate third-party anti-fraud APIs and orchestrate asynchronous processing with Apache Kafka and Google Pub/Sub, while improving observability with Datadog on GCP. I also optimized MySQL queries, reducing response time by ~70% (from ~10s to ~3s), and support production delivery through CI/CD using Jenkins, Spinnaker & SonarQube, plus business flow orchestration with Camunda BPM.

Previously, at Happmobi, I built scalable REST APIs and microservices with Node.js, TypeScript, Express, and NestJS for a platform serving 100K+ daily active users, working within a hybrid architecture (1 monolith + 10 microservices). I drove quality with 80%+ test coverage using Jest and managed Dockerized environments with CI/CD on Azure. Beyond backend, I’ve delivered end-to-end web products and refactored legacy systems, integrating AWS services, cloud deployments (EC2, S3, SNS), and frontend capabilities with React/Next.js/Angular to ship maintainable solutions.