Product development · Higher education, examination logistics · India
10 million hall tickets delivered. Zero bugs reported.
The same examination services provider asked us to put hall ticket delivery online. Candidates across more than 10,000 schools download their own ticket ahead of a session.
At a glance
- Served
- 10,000+ schools
- Peak session
- 1.8 million hall tickets
- Defects
- Zero bugs reported
Why it matters
Why it matters
A hall ticket is what gets a candidate through the door of the exam hall. Late or wrong, and that candidate does not sit.
- Hall tickets delivered
- 10M+
- Hall tickets in one session
- 1.8M
- Requests a minute
- 8K
- Schools served
- 10,000+
The hard part
What makes this hard
- Hard deadlines. An exam date does not move.
- Late data and requirements. Both arrive close to the session.
- Public domain. Candidates use it directly, so there is no scope for an error.
- Concurrent load. Demand lands in one window, not across a week.
What we built
How we built for the window
Demand for a hall ticket arrives in the days before a session, from every school at once, and the same infrastructure sits quiet in between. We built for the peak, not the average.
Late data is the other constraint. Candidate lists and format changes arrive close to the session, so the import and generation steps are built to be rerun safely, as many times as the data changes, without touching tickets already downloaded.
Built to last
Why it keeps working
Every session is rehearsed against the largest one on record.
- 01
Before each session
The service is load tested against the largest session on record.
- 02
During it
Releases ship with zero downtime, and every session is watched live by the engineers who built it.
Beyond this client
The job transfers
The same problem turns up well beyond this one client. These are the teams it fits.
Anyone with a fixed date and a crowd
- Examination and admission boards
- Ticketing and registration systems
- Government notification portals
Anyone whose data arrives late
- Event operations
- Results publication
- Any public service with a launch window
Next case study
CHAIRS Global · AI engineering
The knowledge assistant that never leaves
Facing something similar?