Coding is dead, Long live coding!
Hey, I am Shubh
Professionally at LimeChat, Where I handle problems in infrastrucutre, platform, and performance. Personally, I am currently databasemaxxing, learning Rust, and doing leetcode as a hobby (I can say that because I am looking for a new job right now). I do have hobbies outside of leetcode trust me!
LimeChat is one of the leading providers of AI powers customer support and sales agents for enterprices in India.
Problems/Projects I have worked on here:
- Unified Messaging: I built a Single gateway to send/receive notification across multiple channels(whatsapp/instagram/email...), handles more than 100M messages a day, and entire requests volume upto ~ 1 Billion per day. Contributes multiple millions to the company annual revenue.
- WebRTC Audio bridge: The first company to build a novel audio bridge b/w whatsapp's closed P2P audio stack and Livekit's room based architecture, even Livekit have not done till now. Prototyped this in Python & built a superfast Rust implementation thereafter. Handles close 1000 calls per day. Contributes to thousands of USD to the company annual revenue.
- Infrastructure & Reliability: I solved org-wide problems involving multiple team level initiatives. Reduced postgres cluster CPU usage by 60%, Solved multi-year celery + rabbitmq bottleneck issues, Solved thundering-herd issues on Kafka & RabbitMQ, Completely eliminated outages due to overwhelming queues(Kafka, RabbitMQ, redis) by using stragegies like rate limiter, circuit breakers, and fallbacks.
- Latency: I worked on Agentic studio, a platform to build AI Agents for enterprises. Reduced p95 latency of chat agents by 60% (15s - 6s). I introduced semantic caching on decision making steps & use software engineering fundamentals to reduce the external DB/Cache calls by 95%.
I love building side projects and especially systems engineering projects.
A full-text search engine I built from scratch using Rust & MongoDB. It uses SPIMI with K-way merge for indexing large number of webpages. And, well it supports phrase queries. Give a look at its source code.
Rust Tokio Axum MongoDB Inverted Indexes External-Memory Algorithms
This project was part of codecrafters rust challenge. I have used kafka at work and wanted to see what's inside and built this project. It supports Kafka operations like TopicCreation, PartitionCreation, Produce Messages, FetchMessages, DescribeTopicPartition.
Rust Kafka Protocol KRaft Binary Encoding Storage
A tree-walk interpreter written in Rust to understand language implementation end to end. It includes lexical scanning, parsing, abstract syntax trees, environments, functions, callable values, and runtime evaluation.
Rust Interpreters Parsing ASTs Language Runtimes
I wanted to auto-sync my leetcode submissions to github.
Firefox WebExtensions Rust WebAssembly JavaScript GitHub API
Rust TypeScript Node.js Go Python Kafka PostgreSQL RabbitMQ
Redis Kubernetes Docker gRPC REST
- You don't like getting things done.
- You want to work people who are rigid on technology and say no when asked to solve a problem out of their domain knowledge
- You want to micro-manage me.
- I get things done.
- I don't say I don't know this technology, I learn the tech, figure out the solution and solve the problem.
- I have super high agency.
- I can lift heavy weights.
Contact me at bshubh@proton.me.