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Sahiljangra115/README.md
Sahil Kumar

Sahil Kumar

Software engineer working across AI/ML, robotics, and backend systems.

I build LLM agent systems with PyTorch, LangChain, and LangGraph, run ROS2 and micro-ROS on embedded hardware like the ESP32, and ship on Linux with Docker and Kubernetes. I care about the fundamentals that outlast framework churn: system design, SQL, and clean architecture.

Portfolio Email LinkedIn dev.to

What I work with

tech stack

Area Tools
AI / ML PyTorch, TensorFlow, NumPy, Pandas, OpenAI API, LangChain, LangGraph
Robotics & Embedded ROS2, micro-ROS, XRCE-DDS, ESP32
Infrastructure Linux, Bash, Docker, Kubernetes, PostgreSQL

Teaching

Free, full-length engineering courses at sahilkumar.dev/learn.

  • Available now: Docker, SQL, Linux
  • In progress: Kubernetes, Git, System Design

Selected writing

From sahilkumar.dev and dev.to/sahil_kumar:

  • Micro-ROS and XRCE-DDS, how ROS2 middleware fits onto microcontrollers.
  • The Constant, the LLM mechanics that stay fixed as models grow.
  • Software 3.0, on Andrej Karpathy's framing of the biggest shift in programming in 70 years.

Currently

  • Building LLM agent pipelines and studying the internals behind them.
  • Writing and teaching systems fundamentals.
  • Open to conversations about robotics, AI infrastructure, and Linux. Inbox is open.

Pinned Loading

  1. NyxCore NyxCore Public

    A Self-Aware Middleware Framework for Microcontrollers: TinyML-Driven Anomaly Detection in XRCE-DDS Streams using micro-ROS Lifecycle Management

    CMake 3

  2. Noir Noir Public

    NOIR is an autonomous robot assistant integrating STT/TTS, local LLMs (Gemma 4), and real-time Computer Vision (YOLOv8). It features a Python backend, ESP32 hardware bridge, and a Flutter mobile ap…

    Python 3

  3. HealthByte HealthByte Public

    Personalized health and nutrition engine: EfficientNet-B0 food classification, uncertainty-banded calorie estimation, SQLite biometric time-series, Google Fit OAuth, and statistically honest correl…

    TypeScript

  4. image-N image-N Public

    Multimodal Retrieval-Augmented Generation (RAG) system built from scratch in pure Python: FAISS vector search, local Ollama LLMs, CLIP image retrieval, and a FastAPI service. No framework glue, no …

    Python

  5. Path-tracer Path-tracer Public

    Physically based Monte Carlo path tracer in C++17 with a parallel CUDA port and zero external dependencies. Recursive multi-bounce rendering, lambertian/metal/dielectric materials, depth-of-field c…

    C++

  6. Hackathon-e-commerce- Hackathon-e-commerce- Public

    Jewellery e-commerce storefront built for the PIET hackathon. Next.js + TypeScript, Tailwind CSS and shadcn/ui, 3D product previews via model-viewer, Zustand cart state, NextAuth sign-in, Razorpay …

    HTML 1