How We Scaled to 1 Million Automations Per Day
Maria Santos
VP of Engineering
When we launched SyncFlow two years ago, we processed about 1,000 automations per day. Last month, we crossed the 1 million mark. Here is the story of how we got there.
The Early Architecture
Our v1 was a monolithic Node.js application running on three EC2 instances. It worked fine until it did not. At around 10,000 automations per day, we started seeing queue backlogs and timeout errors.
The Rewrite
We moved to an event-driven microservices architecture using Rust for the execution engine and Kafka for message passing. Each workflow step runs in its own isolated container with strict resource limits.
"The key insight was treating each automation step as an independent unit of work. Once we did that, horizontal scaling became trivial."
What is Next
We are targeting 10 million automations per day by Q4. The architecture is ready. Now it is about optimizing cold start times and building smarter routing algorithms.