Hello, my name is Sebastian
I'm a full stack software engineer.

Designed and implemented an in-app messaging service for buyers and sellers to communicate (Sending texts and images) in online marketplace

Implemented APIs to store and retreive recent contacts, tagged conversations, and unread messages count

Developed notification system integrated with Twilio’s API to improve user engagements

Developed notification system integrated with Twilio’s API to improve user engagements

Designed and implemented an Identity and Access control management service with RBAC for an internal customer care portal

Built RESTful API for (CRUD) users, roles, and permissions, and create/delete user-to-roles and role-to-permissions mapping

Implemented activity log for read/write operations for important resources using Spring AOP with multi-threading

Implemented schedule task and smtp email service for notification of change and alerts

Built a streaming data application to aggregate search data and visualize search event click-through rate for travel marketing channels such as top 50 travel destinations

Made substantial improvements in terms of query time, latency, throughput, and cached data in database

Built a streaming data application to aggregate search data and visualize search event click-through rate for travel marketing channels such as top 50 travel destinations

Made substantial improvements in terms of query time, latency, throughput, and cached data in database