Sahil Pahuja

I am a backend developer and software engineer with a strong foundation in building scalable, reliable, and AI-powered systems. I recently completed my MCA in Software Engineering from the University School of Information, Communication & Technology (GGSIPU), New Delhi, with a CGPA of 8.8. Prior to that, I earned a B.Sc. (H) in Computer Science from the University of Delhi with a CGPA of 9.31. My academic journey has equipped me with strong problem-solving skills, a solid understanding of computer science fundamentals, and a passion for designing efficient systems.

Professionally, I worked as a Software Development Engineer at Carnot Research, where I engineered a production-grade WhatsApp chatbot serving over 83,000 users using LLMs and Retrieval Augmented Generation (RAG) pipelines. I optimized backend APIs and asynchronous workflows, improving throughput by 35% and reducing response latency to under 300 milliseconds. I also contributed to a secure incident management system by building PostgreSQL-backed REST APIs and implementing role-based access control within VPN-restricted environments. Supporting Linux-based backend services further strengthened my understanding of system reliability and operational efficiency.

My technical stack includes Python, JavaScript, TypeScript, C++, FastAPI, Node.js, Express, PostgreSQL, MongoDB, Redis, Docker, and Celery. I have hands-on experience designing scalable backend architectures, building RESTful APIs, and deploying production systems. I am particularly interested in AI-driven applications, prompt engineering, and building intelligent automation solutions using LLMs.

Beyond professional work, I actively contribute to open source. During GirlScript Summer of Code 2024, I ranked in the top contributors by successfully merging multiple pull requests and improving backend stability in Node.js projects.

I enjoy building practical solutions, such as PingDaemon, a backend-driven website monitoring system with async workers and uptime analytics. These projects reflect my interest in scalability, reliability, and performance optimization.

I am passionate about solving real-world problems through technology, continuously learning modern tools, and building systems that are efficient, secure, and user-focused. I thrive in collaborative environments and am eager to contribute to impactful engineering teams where I can grow while delivering meaningful solutions.