We did not build just large scale systems. We have built ultra large scale systems. We are currently working on a platform that has successfully served a peak TPS (transactions per second) of 20000 and is having a daily average of 10000 TPS & <number?> active users per day. Needless to say, this platform is now ready to scale to any extent. We use several architecture patterns and methodologies of performance engineering much earlier in the development process to make sure the systems are ready for scale from day one. We also do performance benchmarking, tuning and refactoring of existing applications to meet your scalability needs