BLOX - BTC Direct

Full Stack Developer

Oct 2019 - Apr 2020 · Amsterdam / Nijmegen, Netherlands

Worked on BLOX, a cryptocurrency trading platform serving approximately 500k daily users.

Scaling Crypto Trading

At BLOX, I was part of a team managing a platform with massive traffic spikes. The architecture relied heavily on CQRS and Event Sourcing via the Axon Framework, which provided the scalability and auditability required for a trading system.

I focused on improving the performance of the trading microservices and ensuring that the high-frequency account management operations remained consistent under load.

Core Responsibilities

  • Maintained and extended microservices supporting trading, account management, and analytics.
  • Contributed to distributed event-driven architecture using Axon Framework and CQRS patterns.
  • Improved stability and performance across multiple backend services.

Technologies

Java 8KotlinSpring BootRESTgRPCAxon FrameworkNode.jsReactJSCordovaMariaDBDockerKubernetesGitLab CI