Subscription and rewards APIs for South Africa’s mobile networks

As part of the technical team, I worked on APIs and microservices, and helped with API documentation and Postman test collections. That meant working with gRPC as the communication protocol between services, handling proto files and YAML configuration, processing very high transaction volumes, and testing systems specifically for how they fail at scale, not just how they succeed.

Advanced PostgreSQL work at real scale: schema design, partitioning and migrations for big data. Health checks over cron jobs. Error monitoring with Sentry.io. Working inside a large, technically rigorous team where code structure and consistency mattered as much as the code itself.