• User management systems.

• Kotlin, DynamoDB, Redis; gRPC; AWS, Kubernetes.

• Architected and implemented a few highly visible features. Coordinated product, mobile, and backend engineers for that.

• Backend improvement and speed-up. API design and evolution. Better testing and CI/CD.

• Python, Django, Postgres, Redis. AWS, Kubernetes.

• Frontend, backend, and product work.

• Implemented a few features both on backend and frontend.

• Typescript, React, Nest.js; GraphQL; Jest, yarn, etc.

• Engineering work on FB Messenger's data API layer.

• Hack (the language), non-public tools and frameworks.