Devanshu Sharma

• Developing SpacetimeDB, a distributed real-time database that brings the data store, application server, and synchronization layers into one high-performance system
• Helping strengthen the open-source SpacetimeDB ecosystem by improving correctness, low-latency access, and scalability for modern real-time and multiplayer applications
• Creating technical blogs and educational material that make real-time infrastructure and distributed systems easier for developers to understand and build with
• Working with a small, systems-oriented team on database and infrastructure problems where throughput, latency, and correctness all matter at once

• Built ARC (Attestation Receipt Compiler), a deterministic verification system that turns GPU telemetry, attestation tokens, and deployment logs into explicit trust receipts
• Designed evidence checks that validate declared GPU identity against live NVIDIA attestation data, helping catch unsupported or mismatched hardware claims
• Integrated NVIDIA Remote Attestation Service with nonce-based freshness guarantees so each receipt is tied to a real evidence collection event
• Created a canonical evidence pipeline for heterogeneous sources like nvidia-smi, NVML, DCGM, OTEL spans, CloudTrail, and NVIDIA EAT JWTs
• Focused heavily on claim boundaries so every receipt clearly states what is supported, contradicted, unknown, or outside the available evidence

• Worked on the core scheduling platform at Cal.com, improving reliability, performance, and security across high-traffic booking flows
• Hardened user-upload handling by fixing a critical Stored XSS vulnerability with stricter validation and sanitization for uploaded assets
• Reworked inefficient scheduling paths by replacing O(n^2) logic with sorting, early-exit scans, and two-pointer techniques, improving key production workloads by up to 25x+
• Improved conflict detection, date-range intersection, and availability filtering for larger multi-user scheduling datasets
• Fixed correctness edge cases around extreme booking durations and cross-locale scheduling behavior
• Reviewed 200+ PRs in a large TypeScript monorepo, helping maintain a high bar for performance, correctness, and code quality

• 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.