Subhranil Mukherjee

Projects

Dynamically Typed Programming Language A ray traced renderer written in Next

Developed a high-performance, object-oriented programming language in C++
Implemented a fast bytecode virtual machine
Employed a custom arena-based memory allocator for a 20% speed boost
Outperformed Python and Lua in benchmark tests
Initial JIT implementation using the LLVM C API already showing 6x performance improvements
Managed CI/CD processes for the project using GitHub actions

Intel 8085 Simulator Running a program in the simulator

Developed a streamlined, high-performance 8085 simulator in pure C
The simulator provides full support for original 8085 opcodes
Includes an integrated assembler, disassembler, debugger, and virtual machine
Offers a comprehensive suite for program compilation, debugging, and execution of 8085 programs
Designed for efficiency and includes a tab completion-based Read-Eval-Print Loop (REPL)

x86 Operating System Booting the operating system

Designed and implemented an x86-based operating system using C++
Features virtual memory based on two level paging and a hybrid tree based heap
Introduced time slice based round-robin preemptive multitasking
Implemented interrupts using descriptor tables
Added console output with detailed stack traces for effective debugging and troubleshooting

Managing and orchestrating a diverse set of 30+ Docker containers, spanning health check, media management, home automation, and ad-blocking services
Configured a robust reverse proxy system with Nginx and Let's Encrypt for secure SSL connections
Implemented Authelia as a Single Sign-On (SSO) solution, enhancing security through two-factor authentication using Microsoft Authenticator
Set up alerts and monitoring using Prometheus and Grafana for system health and performance tracking
Established remote server access and extended network accessibility via Wireguard, facilitated by a VPS hosted on Microsoft Azure

Created an ESP32-based digital clock integrated with a dot matrix display
The codebase, developed in C++, features an NTP clock with a web-based configuration page
Added a BMP280 temperature sensor and an automated on/off function based on the time of day
Called APIs to get local weather, which was cached and updated at an interval
The device featured automatic hotspot capabilities in case of WiFi signal loss

3D Renderer Rendering a cat using the renderer

Developed a C++-based OBJ file renderer using SDL
Implemented controls for translating and rotating the rendered object within the window
Provided a user-friendly and interactive UI for 3D rendering experience
Implemented a CUDA backend for the projection workflow
Added various matrix types to copy data to and from CPU and GPU

Primarily worked in the middle-end and backend of the target compiler
Implemented various architectural features in the compiler for existing and next-gen products
Wrote multiple new functional and optimization passes
Fixed 50+ bugs and enhanced codegen for existing passes
Solved end-to-end compiler bugs in 10+ Steam top titles
Wrote 10+ tools and automations for aiding end-to-end debugging
Brought up 2 new members in the team and guided in their projects

Managed more than 50000 users and devices across Azure AD, IBM ISIM and a few other IGA tools
Provisioned RSA authentication, temporary/permanent local administrative rights to devices
Authored and documented 20+ automations in Powershell for mass AD modifications, increasing work efficiency more than 50%
Handled access management using AD groups, solving approximately 20 AD related issues regularly
Took part in 3 multi-faceted high priority incidents as team representative and provided analytical and pertinent insights
Helped onboard 4 new members of the team by arranging multiple knowledge transitions, increasing team size by 40%
Created diagrams, 5+ SOPs for new scopes of work and other documentation
Extended existing tools by writing backend code in JavaScript/Powershell implementing new workflows