Death of the monolith

The PSS application was performing well, successfully supporting all business requirements as well as the expected service levels. The system had no issues in scaling with the organic growth of the business in the initial years.

The business has seen tremendous growth over a period of time. The fleet size increased significantly, and new destinations got added to the network. As a result of this rapid growth, the number of bookings has gone up, resulting in a steep increase in transaction volumes, up to 200 - to 500 - fold of what was originally estimated.

Pain points

The rapid growth of the business eventually put the application under pressure. Odd stability issues and performance issues surfaced. New application releases started breaking the working code. Moreover, the cost of change and the speed of delivery started impacting the business operations profoundly.

An end-to-end architecture review was ordered, and it exposed the weaknesses of the system as well as the...