An assessment platform that survives exam-day concurrency
An illustrative scenario showing how a national training provider could replace a fragile exam tool with a platform built for simultaneous sittings.
Illustrative solution scenario, not a client engagement.
Reliable handling of large concurrent candidate volumes
A durable submission path that avoids lost work
An accessible experience aligned with WCAG 2.2 AA
The challenge
What was breaking.
The legacy tool assumes steady traffic, but real usage arrives as tens of thousands of candidates starting within the same minute.
Any dropped submission is an academic integrity incident, so the new design must guarantee durability even through network loss on the candidate side.
Our approach
How we delivered it.
Write-ahead client
Answers persist locally and sync continuously, so a dropped connection never loses candidate work.
Queue-backed submissions
Submissions are accepted to a durable queue and processed asynchronously, decoupling grading from the exam window.
Predictable scaling
Capacity is pre-warmed against the published exam calendar rather than reacting to load after it arrives.
Accessibility compliance
The candidate experience is designed to WCAG 2.2 AA with screen-reader and extra-time support.
Services applied
The team on this work.
- SaaS Product Engineering
- Cloud & DevOps
- UI/UX Design
Technology
What it runs on.
- React
- TypeScript
- Django
- PostgreSQL
- Redis
- Azure
Explore more
Related work.
Tell us what needs to ship.
A 30-minute call with the engineers who would run the work — not an account manager.