Professional Summary
Backend engineer at SDE-3 level with 5+ years building REST APIs, event-driven services and real-time systems in Node.js , TypeScript , NestJS and Express.js . Owns backend work end to end: PostgreSQL schema design and zero-downtime migrations, Kafka and RabbitMQ event pipelines, Redis caching, Elasticsearch search, Socket.IO WebSocket gateways, and production monitoring with Prometheus and Grafana . Has run these systems in EdTech, WhatsApp messaging automation and multiplayer gaming, with measured results including 40% lower search latency , 35% faster API responses and 99.9% uptime at ~100K messages per bot per day . Takes feature scope and high-level design decisions directly with clients, documents the approach before starting a task so scope, effort and trade-offs are agreed in writing, and proves the design out as a POC before committing to a build. Works comfortably as the only backend engineer on a service or inside a team.
Work Experience
OneCX
Software Development Engineer 3
Multiplayer Learning Game · Real-Time Game Backend · Custom Emailer Service
Apr 2025 – Present
Gurugram, HR
Gurugram, HR
Promoted to SDE-3 in April 2025 after the INTERCOMM and multiplayer learning game delivery record as SDE-2.
- Backend ownership: sole owner and technical point of contact for a production multiplayer learning game backend, built as a modular NestJS service with DTOs, guards, interceptors and a separated service layer, so several developers could ship features in parallel without merge conflicts.
- Scope and technical decisions: works directly with clients and product on feature scope and the high-level design calls behind it, then turns those into backend deliverables, API contracts and a delivery order the team can pick up.
- Proof of concept work: builds POCs for new features and integrations so the approach, cost and failure modes are settled before full implementation begins.
- Search service: indexed ~12 million dictionary entries in an Elasticsearch cluster with Redis caching in front, cutting average lookup latency by 40% and keeping results consistent under high concurrent load.
-
Real-time WebSocket layer:
built the Socket.IO gateway for live game-state synchronisation, player matchmaking and multiplayer
feedback, with a consistent
${eventName}:errorevent contract so client teams could detect and handle failures without guesswork. - Queues and workers: moved power-up processing (Magic Word, Highlight) into BullMQ background jobs, taking the work off the request path and cutting average API response time by ~35% across active game sessions.
- PostgreSQL schema and migrations: designed the learning module schema covering spaced repetition, difficulty progression and learner progress tracking, and ran the full TypeORM migration lifecycle: adding NOT NULL columns as nullable, backfilling, then tightening the constraint to avoid downtime.
- Monitoring and deployment: instrumented services with Prometheus metrics and Grafana dashboards for health and traffic, cutting mean time to detect incidents by 50% ; every service runs in Docker with per-environment configuration.
- API security: implemented JWT authentication, rate limiting, field-level encryption and NSFW content moderation, plus reusable webhook handlers and third-party integration modules that other teams pick up directly.
- Custom Emailer Service: built a standalone email delivery tool for the internal dashboard of a renowned client, with custom To/CC configuration, dynamic attachments, per-report settings and scheduled delivery. It now carries the daily grievance reporting workflow for 20 to 25 management recipients.
- Delivery: runs sprint planning, writes architecture documentation with Mermaid.js diagrams, manages Jira workflows and reviews pull requests to keep standards consistent across the backend team.
OneCX
Software Development Engineer 2
INTERCOMM · WhatsApp Automation · BridgeQ · Multi-Channel Messaging
Nov 2022 – Mar 2025
Gurugram, HR
Gurugram, HR
- INTERCOMM platform backend: built and scaled a WhatsApp Business API platform as the only backend engineer, covering Campaign Builder, Template Creator, Custom Flow Designer and analytics. It processed 1M+ campaign messages per quarter , contributed to a 10× expansion in business reach , doubled sales revenue and a measured 45% improvement in campaign ROI .
- Queue and webhook throughput: sustained ~100,000 messages per day per bot using Redis-backed queue management, webhook event processing and async job handling, holding 99.9% uptime under sustained load.
- BridgeQ event-driven backbone: architected a multi-channel messaging service on Kafka for async event communication and RabbitMQ for event routing, decoupling services and improving resilience. A provider-credential abstraction layer let new messaging channels be added without touching core business logic.
- REST APIs and monitoring: shipped production REST APIs and internal dashboards instrumented with Prometheus and Grafana, and integrated third-party provider APIs behind webhook and adapter patterns new engineers could follow on their own.
- CI/CD and documentation: owned the GitHub Actions pipelines, set the Git workflow standards the team uses, and wrote the technical documentation and runbooks still in active use.
PrepLadder
(Unacademy)
Software Engineer · SDE-1
Push Notification & User Retention Infrastructure
Aug 2022 – Oct 2022
Chandigarh
Chandigarh
- Notification scheduling service: designed and shipped a data-driven push notification scheduler in Node.js and Express with personalised payloads and send-time selection, which measurably improved user retention across the platform.
- Database administration and tuning: administered AWS RDS and Apache Cassandra instances and applied SQL performance tuning across schemas, indexes and query patterns to keep notification delivery fast and available at scale.
PrepLadder
(Unacademy)
Junior Node.js Developer
Website Plan Data APIs · Know Your Student (KYS)
May 2021 – Jul 2022
Chandigarh
Chandigarh
- Course content APIs: built and maintained the RESTful APIs behind the Website Plan Data module, serving segmented course content to thousands of students every day.
- KYS backend: sole developer on Know Your Student, delivering encrypted REST APIs whose pop-up and form logic came entirely from database-table configuration, so non-technical teams could change behaviour without a code deployment.
- Dynamic forms and data integration: built dynamic form management, real-time metadata updates and AWS RDS integration inside an Agile team, with code review and documentation habits carried into later roles.
Key Projects
Multiplayer Learning Game · Real-Time Game Backend
OneCX · 2025–Present
- Designed and maintained the whole backend for a production multiplayer platform: real-time gameplay over WebSockets, ELO-based matchmaking and a multi-tenant admin dashboard.
- Indexed ~12 million dictionary entries across Elasticsearch and Redis, sustaining 200K+ concurrent player sessions with 40% lower lookup latency than the previous implementation.
- Moved power-up processing to BullMQ workers, cutting request-path API response times by ~35% , and modelled spaced repetition, difficulty progression and learner progress in PostgreSQL.
- Added Prometheus and Grafana instrumentation across services, reducing incident detection time by 50% in production.
INTERCOMM · WhatsApp Business Automation Platform
OneCX · 2022–2025
- Sole backend engineer for Campaign Builder, Template Creator, Custom Flow Designer and analytics, together processing 1M+ messages per quarter .
- Built the event-driven messaging backbone on Kafka and RabbitMQ, holding ~100K messages/day/bot at 99.9% uptime with a 45% improvement in campaign ROI .
- Supported a 10× expansion in client business reach and doubled platform sales revenue within the first year of launch.
BridgeQ · Multi-Channel Messaging Backbone
OneCX · 2022–2025
- Event-driven architecture (Kafka + RabbitMQ) unified SMS, Email and FCM push under a single routing layer for a hyperlocal QSR platform prototype.
- Provider-credential abstraction reduced new-channel integration to configuration only; zero core logic changes required.
Custom Emailer Service · Bulk Email Delivery Tool
OneCX · 2025–Present
- Batched and scheduled delivery for a renowned client, built to keep a recurring dispatch on time without a person driving it.
- Custom To/CC configs, dynamic attachments and per-report delivery profiles for daily grievance and management reporting.
PNA · Push Notification Activity System
PrepLadder · 2022
- Sole developer on the notification scheduling infrastructure, building personalised payload logic and optimal send-time selection that measurably improved retention on a large-scale EdTech platform.
- Tuned SQL on AWS RDS and optimised Cassandra query patterns to keep notification delivery highly available at scale.
KYS · Know Your Student System
PrepLadder · 2021–2022
- Built the KYS backend solo: encrypted REST APIs driving pop-up and form behaviour from database-table configuration, giving non-technical teams control over the student experience without deployments.
- Delivered real-time metadata updates and form interactivity that improved student onboarding conversion on the PrepLadder platform.
Numsy · Indian Mobile Number Toolkit
Open Source · 2026–Present
- Creator and maintainer of Numsy, an open-source library, CLI and local dashboard that validates, extracts and de-duplicates Indian mobile numbers from CSV, Excel and text, published on npm as numsy.
- Built one browser-safe engine shared by the library, the CLI, a NestJS dashboard on localhost and a website playground that runs in a Web Worker, so every surface returns the same result.
- Validates about 1.1 million numbers per second and analyses and de-duplicates 500,000 rows in under 2 s, verified on real workbooks of up to 505,277 rows.
- Gated by 145 unit and API tests and Playwright end-to-end suites that check every dashboard figure against the engine, with releases cut by semantic-release.