Scaling K-12 test prep from 350K to 800K+ students
Modernized the platform behind a K-12 essay-scoring service so it could scale from 350,000 to more than 800,000 students without breaking.
Result: 350K → 800K+ students
What they were up against.
The platform that scored student essays was straining under growth. To win bigger contracts it had to more than double its load — but the aging system couldn't take it. Performance buckled as volume climbed, and pushing further risked the accuracy and reliability the service is sold on.
- Performance buckled as volume climbed
- Scaling further risked accuracy and reliability
- Bigger contracts were out of reach until the platform could keep up
How we did it.
Re-architected the platform
Rebuilt the application to ingest, score, and report at far greater scale than the original design allowed.
Hardened the data pipeline
Reworked the data underneath so accuracy held as volume grew — no trade between speed and correctness.
Built for headroom
Sized for the growth after the next contract, not just the next contract.
What changed.
- The platform scaled from 350,000 to more than 800,000 students — 2.3× growth — and held accuracy and reliability through the jump.
- It was built to keep going as the service grows, not just to clear the next contract.
Inside the build.
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