Siddharth Singha Roy

Research Scientist 2

Microsoft · GitHub Copilot

Research Scientist on the GitHub Copilot Science team at Microsoft, working on Large Language Models and AI for Software Engineering. Building intelligent systems to make developers more productive.

Experience

Microsoft

2022 — Present

Research Scientist 2
Jul 2025 —
GitHub Copilot — auto-mode model routing and HydraFusion.
Software Engineer 2
2024 — 2025
Microsoft Playwright Testing — a managed Azure service for running Playwright browser tests at cloud scale.
Software Engineer
2022 — 2024
Software Development Intern
Jan — Jun 2022

NatWest Group

2021

Software Engineer Intern
May — Jul

Publication

HyDRA: Hybrid Dynamic Routing Architecture for Heterogeneous LLM Pools

A. Garg, S. Singha Roy, J. Jang, F. Brancasi, S. Fu

arXiv 2605.17106May 2026

Education

Vellore Institute of Technology

B.Tech, Computer Engineering

2018 — 2022