Case study · Bidyasagar ClassesAn online coaching platform that runs its own live classes

Admin, teacher and student portals for a competitive-exam institute — courses, batches, automated live classes, mock tests, a referral wallet and a book store in one system.

Built at GravitonesLive

Industry: EdTech
Location: Bhubaneswar, India
Timeline: Lead since May 2026
Year: 2026

role-based portals — admin, teacher and student: 0; role-based portals — admin, teacher and student
screens across the three portals: 0+; screens across the three portals
API routes behind the platform: 0+; API routes behind the platform
question types with per-type negative marking: 0; question types with per-type negative marking

The challenge

What the client needed.

An online coaching institute is quietly five businesses: a video library, an exam board, a live-classes operation, a store and a publisher. When I took over as lead developer, the platform existed, but teaching hung off courses, live classes were coordinated by hand against a small pool of Zoom licences, and growth tools like referrals didn't exist. The job was to make it run itself — without breaking it for the students already using it.

My role

Lead developer since May 2026 — took over an existing platform, re-architected teaching around batches and built live-class automation, the referral wallet and exam-engine upgrades

The approach

How I built it.

01
Re-architected teaching around batches: content, live classes, recordings and access now belong to a batch, so one course can run many cohorts cleanly.
02
Automated live classes: the platform allocates a free Zoom licence per slot, blocks clashes at scheduling time, shares one session across several courses and batches, and issues per-student registration links.
03
Published class recordings automatically as soon as Zoom makes them available, and auto-closed stale sessions.
04
Extended the exam engine: six question types with per-type negative marking, timed attempts, bulk spreadsheet import with duplicate detection and test series sold as products.
05
Built the growth layer — coupons with limits, referral codes for students, teachers and partners, a wallet usable at checkout and admin-approved withdrawals — plus role-based access, a central doubt panel and support tickets.

Key engineering decisions

The hard problems, and how I solved them.

The decisions that made the difference — each one a trade-off chosen on purpose.

01
Dozens of classes, a fixed pool of licences
Problem
Each Zoom licence hosts one meeting at a time; manual scheduling meant clashes discovered when students couldn't get in.
Decision
Dynamic host pooling: the system picks a free licence for the window and rejects a clash at the moment of scheduling.
Outcome
Class-start failures stopped being part of the working day.
02
Teaching belongs to batches
Problem
Content and classes hung off courses, so running a second cohort of a course meant duplicating it.
Decision
Moved content, classes, recordings and access from the course to the batch, with batch management on its own screens.
Outcome
Launching a new cohort is an assembly job, not a rebuild.
03
An exam engine students trust
Problem
Mock tests must mirror real exams — mixed question types, negative marking, strict timing — and years of questions lived in spreadsheets.
Decision
Per-type marking rules, answers saved as students work, and bulk import with duplicate detection.
Outcome
Instant, consistent results, and the question bank arrived as one bulk operation.
04
Word of mouth, made measurable
Problem
Most enrolments came from recommendations nobody could see or reward.
Decision
Referral codes with a visible wallet, spendable at checkout or withdrawn through an approval queue, every credit recorded.
Outcome
An invisible channel became trackable and auditable.

What shipped

Everything that went live.

Admin portal
Courses, batches, syllabus library, question bank, test series, live classes, payments, coupons, payouts and content.
Teacher portal
Own subjects and batches, live classes, recordings, student doubts and support tickets.
Student portal
Enrolled courses with progress, live schedule, study material, tests, results and analytics.
Live-class automation
Zoom licence pooling, clash detection, shared sessions and automatic recordings.
Exam engine
Six question types, per-type negative marking, timed attempts and bulk import.
Commerce & growth
Razorpay checkout, coupons, referral wallet, withdrawals and a digital + printed book store.