AI infrastructure · Chandigarh, India

Shashank Dhiman.

Builds the parts that don't fail
when production finally looks at them.

@dhimanshashank·real-time + ai infra·Chandigarh, India

1+ year shipped·4 production systems·open to remote roles

Selected workThe story

Pencil sketch portrait of Shashank Dhiman

sd · 2026

$ skills --list

real-time systems

websockets at scale · webrtc · event-driven pipelines

ai infrastructure

llm integration · inference queues · adversarial robustness

backend & apis

node.js · typescript · postgresql · redis · rest + queue apis

shipping

next.js · docker · ci/cd · observability

▍ Plate II — Experience

Where I've shipped.

One year, four production systems — currently building the real-time and AI infrastructure behind Masters' Union's EdTech learning platform (LMS).

Masters' Union
Jan 2025 — Present
Associate Software Developer · EdTech
Own the real-time backbone of the learning platform (LMS) at an MBA-equivalent EdTech institution — AI proctoring at exam scale (WebRTC/SFU, 200+ concurrent streams), a unified messaging layer, and an event-analytics pipeline. Shipped to production, serving live student cohorts.
- EdTech
- LMS
- WebRTC
- Real-time
- LLM infra
Qspider
2024
Software Development Intern
Shipped Eventify — a MERN event platform with Stripe webhook-driven orders, JWT auth, and role-scoped access.
- MERN
- Stripe
- JWT

B.Tech, Computer Science & Engineering · Guru Nanak Dev Engineering College, Ludhiana · 2021 — 2025 · CGPA 8.45

▍ Plate III — Selected Work

Four systems. One year.

01/ 04

AI Proctoring Platform

WebRTC at exam scale

An SFU-based proctoring platform routing 200+ concurrent student streams without decoding a single frame on the server. Behavioral classification (eye-gaze, tab-switch, multi-signal correlation) runs in client worker threads; OpenRouter-powered LLM summaries turn raw session events into reviewer-ready reports. Sub-200ms alert delivery to admin dashboards.

200+

concurrent streams

+35%

proctoring throughput

<200ms

alert latency

webrtc · mediasoup · mediapipe · openrouter · node · postgres · redis

Read case study Live

Masters' Union · EdTech · production

FIG. 01

architecture

02/ 04

Doubt & Discussion

Four chat types, one socket layer

Direct chats, group threads, course discussions, and announcements — four conversation types sharing one realtime layer with sub-100ms delivery. DataLoader batching killed the N+1 patterns in chat history; the system tracks who's viewing what, so messages auto-mark-read when the recipient is already inside the thread.

chat types unified

−70%

API latency

−60%

DB round-trips

node · socket.io · redis · postgres · sequelize

Read case study

Masters' Union · EdTech · production

FIG. 02

architecture

03/ 04

Event Analytics Pipeline

Serverless ingest, columnar query

Event-driven analytics: thousands of LMS events per day flow through Lambda into ClickHouse with YYYYMM partitioning and composite sort keys. A regex classifier maps raw events into nine categories, configurable without redeploy.

−55%

query time

event categories

aws lambda · sqs · clickhouse · node

View in work

Masters' Union · EdTech · production

FIG. 03

architecture

04/ 04

Eventify

MERN · Stripe · webhook-driven orders

Full-stack event-management platform — browse, book, and pay for events end-to-end. Stripe Checkout handles payment, but order state lives in the webhook handler — never the client confirmation — so a closed browser mid-payment doesn't lose a paid order. JWT auth + role-scoped middleware keeps organisers, attendees, and admins on their own surfaces.

lost payments

user roles, scoped

react · node · express · mongo · stripe · jwt

View in work Live

Qspider · internship

FIG. 04

code

01 / 04

01 / 04Masters' Union · EdTech · production

FIG. — system architecture, production

AI Proctoring Platform

WebRTC at exam scale

200+concurrent streams
+35%proctoring throughput
<200msalert latency

webrtc · mediasoup · mediapipe · openrouter · node

Case study Live ↗

02 / 04Masters' Union · EdTech · production

FIG. — system architecture, production

Doubt & Discussion

Four chat types, one socket layer

4chat types unified
−70%API latency
−60%DB round-trips

node · socket.io · redis · postgres · sequelize

Case study

03 / 04Masters' Union · EdTech · production

Event Analytics Pipeline

Serverless ingest, columnar query

−55%query time
9+event categories

aws lambda · sqs · clickhouse · node

View

04 / 04Qspider · internship

webhook.ts

typescript

// Webhook is the source of truth — client confirmation is never trusted
const event = stripe.webhooks.constructEvent(
  req.body,
  req.headers["stripe-signature"],
  process.env.STRIPE_WEBHOOK_SECRET,
);

if (event.type === "payment_intent.succeeded") {
  await Order.markPaid(event.data.object.metadata.orderId);
}

Eventify

MERN · Stripe · webhook-driven orders

0lost payments
3user roles, scoped

react · node · express · mongo · stripe

View Live ↗

↔ Swipe to explore

▍ Plate V — Engineering Log

Hard reload. Recording gone forever.

P2aws s3 · mediarecorder · node · May 2026

The clue

$ aws s3api list-multipart-uploads --bucket proctoring-prod  UploadId : a3f9...c2d1   State : in-progress  Parts    : 14 uploaded  Object   : <does not exist — 404>

Root cause

A multipart upload only becomes a readable S3 object after CompleteMultipartUpload fires. Until then the parts exist in S3 storage but produce a 404 on any GET. One missed event = permanent data loss with no server-side recovery hook.

The fix

Replaced the continuous stream with independent 30-second segments, each uploaded as a standalone PutObject — a complete, immediately readable file the moment it lands. A BullMQ job runs 10 minutes after quiz end time and merges whatever segments arrived, so even a full browser crash leaves an admin-viewable recording.

Open the log

▍ Measured, not claimed

live · synced

leetcode solvedbeats 90.8%
concurrent streams
proctoring throughput
api latency
db round-trips

leetcode · beats 90.8%

Easy106/ 953

Medium115/ 2081

Hard19/ 951

View profile

90 submissions in the past one year

last 26 weeksbusiest day in orangemax streak 3251 active days

▍ Plate IV — Territory

Real-time systems

websockets at scale
event-driven pipelines
low-latency state

AI infrastructure

inference queues
adversarial robustness
model-serving infra

fig. 05 — live signal · it notices you

The system is the portrait.

Read the story

Shashank Dhiman.

Where I've shipped.

Associate Software Developer · EdTech

Software Development Intern

Four systems. One year.

AI Proctoring Platform

AI Proctoring Platform

Doubt & Discussion

Event Analytics Pipeline

Eventify

Hard reload. Recording gone forever.

Real-time systems

AI infrastructure

The system is the portrait @keyframes sketch-draw { to { stroke-dashoffset: 0; } } .

The system is the portrait.