Open to new roles

Rahul
Singh.

Noida, India

Senior Software Engineer · 6 years building systems at scale.
Motovlogger · Traveller · Cricket · Content Creator

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Two sides, one person

What I'm about.

Work Experience

6 years.
Millions of users.

Trajector
Senior Software Engineer
Trajector
Apr 2024 — Present
IaC
Infra as Code
AWS
Lambda · DynamoDB
  • Engineered core Node.js backend services on AWS Lambda using SST, powering client journey, document upload (S3), and task assignment.
  • Designed scalable event-driven microservices with AWS EventBridge & DynamoDB Streams — seamless integration across internal services.
  • Spearheaded Infrastructure as Code using Serverless Stack — fast, repeatable, environment-aware deployments across all services.
  • Led DynamoDB → MongoDB migration using dual-write architecture to maintain bidirectional data integrity throughout the transition.
Node.jsAWS LambdaSST EventBridgeDynamoDBMongoDBS3
Rooter
Software Engineer III
Rooter — India's #1 Game Streaming Platform
Jan 2022 — Apr 2024
7M
Monthly active users
300K
Concurrent viewers
−20%
EC2 cost
  • Built a gaming e-commerce platform from scratch — digital/physical goods, real-time top-ups (Steam, BGMI, Free Fire) with Paytm & Razorpay integrations.
  • Developed an in-app notification tab used by 7 million users/month, driving a 20% increase in user retention.
  • Migrated database to MongoDB overnight — powered India's biggest esports event with 300K concurrent users watching, commenting, and liking in real-time.
  • Built a personalised content feed pipeline using AWS EMR + Redis, processing user impression data to serve recommendations for 1M+ users.
  • Led Kubernetes migration from EC2 — Docker, CI/CD, Grafana monitoring, autoscaling → 20% cost reduction.
Node.jsPythonKafkaRedis MongoDBMySQLKubernetesAWS EMRGrafana
Gradeup
Software Engineer
Gradeup (now Byju's Exam Prep)
May 2020 — Dec 2021
−70%
Response time
+300%
Sitemap content
93%
Spam removed
  • Revamped a content sharing platform — p95 latency from 1s → 300ms, error rate down 50%.
  • Implemented ElasticSearch on Byju's Exam Prep for searching videos, live sessions, and content.
  • Automated sitemap generation via message queues — tripled indexed content, landing pages in Google's top 5.
  • Trained a TensorFlow deep learning model to detect image profanity — 93% spam profile removal.
Node.jsElasticSearchPython TensorFlowSQSMySQL
Google Summer of Code
Open Source Intern
Google Summer of Code — openSUSE
May 2019 — Sept 2019
1/2
Selected from 50+
90%
Test coverage
  • Selected as 1 of only 2 participants out of 50+ applicants globally for a 3-month internship.
  • Designed and built a complete invitation system in Open Source Event Manager — APIs, UI, and tests with 90% coverage.
Ruby on RailsREST APIOpen Source
Technical Skills

The stack.

Languages
🐍 Python ⚡ JavaScript 🐹 Go ⚙️ C++
Backend
🟢 Node.js 🚀 ExpressJS 🏗️ NestJS
Databases
🍃 MongoDB 🐬 MySQL 🐘 PostgreSQL ⚡ DynamoDB 🗄️ Cassandra 🔴 Redis
Cloud & DevOps
☁️ AWS 🐳 Docker ☸️ Kubernetes 🔄 CI/CD 📊 Grafana
Data & Messaging
📨 Kafka 📬 SQS 🔎 ElasticSearch 🐘 Hadoop/EMR 📊 Redshift
AI / ML
🤖 TensorFlow 🧠 Deep Learning 📈 Data Pipelines 🔬 Kaggle
Life

Beyond the
office chair.

Four things I care about when the laptop is closed.

Motovlogging
Riding roads less taken
🏍️
Cricket
Weekend winner
🏏
Travel · @OffbeatRahul
🌍
Building
Where the code happens
💻
Achievements

Highlights.

🏆
Aug 2020
Winner — Smart India Hackathon

1st place out of 50+ teams nationwide. Built a real-time government negotiation portal with live collaboration and video chat.

🌟
Apr 2023
Mentor — Google Summer of Code

Mentored contributors to eval.ai — an open platform used globally to host machine learning competitions.

📚
Nov 2020
Published — Springer LNEE

Co-authored "Breast Cancer Classification Using Transfer Learning" in Lecture Notes in Electrical Engineering, Springer.

🎓
Dec 2019
Google Code-In — TensorFlow

Mentored school students in their first open source contributions to Google's TensorFlow project.

JSS
B.E. in Information Technology
JSS Academy of Technical Education, Noida
2016 — 2020
8.03
CGPA / 10

Let's make
something.

Open to new roles, interesting projects, and good conversations about tech or travel.

Say Hello 👋 Download CV →
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