Abir Roy
Systems & Software Engineer
I build high-performance systems where efficiency isn't an afterthought—it's the foundation. From low-latency C++ architectures and lock-free data structures to scalable full-stack web application, I focus on writing code that holds up under real-world pressure.
My foundation is built on the algorithmic rigor of competitive programming, which drives my approach to system design: crafting solutions that are not just correct, but mathematically fast, resilient, and built to scale
Algorithmic Foundation
Algorithms dictate system limits. My competitive programming background drives how I approach low-latency design, memory alignment, and concurrency in production.
/global-tier
- ├─INOI 2023 Bronze Medalist: Secured rank among top 64 nationally in the Indian National Olympiad in Informatics. Qualified via ZIO (Zonal Informatics Olympiad), demonstrating aptitude in discrete mathematics and logical reasoning
- └─Meta Hacker Cup (2021-2025): 5x Qualifier. Ranked Top 2000 globally in 2025
/high-frequency-arenas
- └─IICPC Codefest 2025 Regionals (Rank 201): Competed in high-stakes arenas backed by Jane Street and Citadel, focusing on extreme optimization and edge-case resolution
/metrics-and-leadership
- ├─Verified Ratings:
- └─Architected Codecracker 2025: Managed infrastructure, designed edge-case test suites, and led community engagement for 150+ participants
Production Code & Open Source
I thrive in massive, undocumented codebases. From implementing parallel algorithms in C++ standard libraries to shipping enterprise features for platforms used by 200k+ teams.
Developed the distributed parallel implementation of hpx::equal. Handled complex iterator type resolution and parallel dispatch mechanisms, diagnosing boundary-alignment edge cases that inspired architectural improvements to the C++ Standard Library for Concurrency
Shipped production features for a high-scale scheduling platform used by 200k+ teams, collaborating directly with core maintainers
- ↳PR #25638: Implemented SPA-safe History API listeners; reduced duplicate tracking signals by 80% via Zod schema validation
- ↳PR #25499: Refactored fragile slug logic with URI encoding to resolve critical routing failures for enterprise clients
- ↳PR #24849: Diagnosed and patched Docker Compose networking errors, restoring cross-platform build consistency
Implemented an update subcommand with automatic package manager detection (npm, brew, yarn) and secure, platform-aware error handling. (Reopened and under active maintainer review)
Resolved a UI rendering bug and console error by enforcing strict design token compliance within the enterprise Fuselage component library, eliminating invalid state warnings
Architecture & Systems
I build infrastructure, not just interfaces. While my full-stack work handles real-world traffic, my deepest engineering focus is on deterministic performance and hardware-sympathetic C++ design.
Micromatch
High-Performance Limit Order Book
- •Designed a linear memory arena to pre-allocate order objects, eliminating runtime heap allocations (
new/delete) on the hot path. - •Developed a TCP/IP Gateway using POSIX sockets to ingest binary packets, simulating exchange-grade connectivity.
AtomicQueue
Wait-Free SPSC Ring Buffer
Engineered a C++17 lock-free queue for high-frequency thread communication. Eliminated false sharing cache-misses by enforcing strict alignas(64) byte alignment on head and tail pointers.
Aarohan Website & InsightSphere
Enterprise & Event Web Apps
Proof of full-stack delivery. Built the official traffic-heavy portal for NIT Durgapur's annual tech fest (Next.js/Tailwind) and engineered a robust RBAC blog platform featuring optimized PostgreSQL queries via Spring Boot.
Technical Arsenal & Education
A categorized overview of the languages, frameworks, and infrastructure I use to build scalable systems, alongside my academic foundation.
Engineering Stack
Education
National Institute of Technology (NIT), Durgapur
Bachelor of Technology
Chemical Engineering
Developer Environment
I believe an engineer should understand their tools from the kernel up. I daily-drive Arch Linux and utilize Hyprland as my window manager. Building, configuring, and maintaining my own custom desktop environment has given me a deep appreciation for Linux system architecture, shell scripting, and uncompromising performance.
