Devanshu Sharma

• Developing SpacetimeDB, a distributed real-time database that combines storage, application logic, and synchronization into one high-performance system
• Improving correctness, scalability, and low-latency access for open-source real-time infrastructure used in modern multiplayer and collaborative applications
• Creating practical technical writing and tutorials that make distributed systems and real-time database concepts easier for developers to build with

• Built ARC (Attestation Receipt Compiler), a deterministic verification system that turns GPU telemetry, attestation tokens, and deployment logs into explicit trust receipts
• Engineered NVIDIA attestation checks with nonce-based freshness guarantees to detect unsupported, mismatched, or unverifiable GPU identity claims
• Designed a canonical evidence pipeline across nvidia-smi, NVML, DCGM, OTEL spans, CloudTrail, and NVIDIA EAT JWTs with clear supported, contradicted, unknown, and out-of-scope claim boundaries

• Improved reliability, performance, and security across high-traffic booking flows on Cal.com's core scheduling platform, including a Stored XSS fix for user-upload handling
• Replaced O(n²) scheduling logic with sorting, early-exit scans, and two-pointer techniques, improving key production workloads by 25 times
• Strengthened conflict detection, availability filtering, cross-locale correctness, and overall code quality while reviewing 200+ PRs in a large TypeScript monorepo

• Graduated with a Bachelor of Technology in Computer Science and Engineering from Graphic Era Hill University, Dehradun
• Coursework included Data Structures and Algorithms, Operating Systems, Computer Networks, Database Management Systems, Cloud Computing, Computer Architecture, Object-Oriented Programming, and Web Development
• Most interested in systems classes: databases, operating systems, networks, and the parts of software where abstractions meet hardware and latency

Most comfortable close to systems work: Go for backend and infrastructure, C/C++ for lower-level thinking, and SQL for the database-shaped parts of the world.

I like building services that are fast, correct, observable, and boring in production in the best possible way.

Interested in indexing, query paths, coordination, migrations, and all the little decisions that make data systems trustworthy.

The usual kit for building, debugging, shipping, and occasionally staring very hard at a terminal until the truth appears.