E-Commerce Mobile App Backend

The mobile app is a digital assistant and service platform developed for a large hardware retailer, enabling customers to connect with experts through a modern mobile app backed by scalable cloud services.

Challenge

Besides daily feature development, the authorization layer had to be improved and extended. It needed a more flexible and scalable solution than the existing one.

My Contribution

I started working on the backend sytem after the initial phase of the Android app. At first I focused on feature development and later took over the responsibility for the authorization layer, adding a PIP to the overal policy architecture.

Key contributions included:

• Backend & DevOps Engineering
  • Implemented backend features using AWS ECS, NestJS, and Kafka.
  • Worked with event sourcing patterns and extended authorization policies using OPA and PIP.

Impact

Backend improvements increased robustness, security, and scalability across the platform.

aws ecstypescriptnest.jsrest apigraphqlkafkaevent sourcingopaterraformbitbucket