JigsawStack (now rebranding as Interfaze) is an AI infrastructure startup providing a unified SDK and API suite of purpose-built small models designed to automate high-maintenance backend developer ta
JigsawStack (now rebranding as Interfaze) is an AI infrastructure startup providing a unified SDK and API suite of purpose-built small models designed to automate high-maintenance backend developer tasks including web scraping, OCR, translation, speech-to-text, and classification. The company's flagship evolution, Interfaze, is positioned as 'the world's first LLM built for deterministic developer tasks,' combining heterogeneous deep neural networks, small language models, and a context-construction layer into a single OpenAI-compatible API. Founded in January 2024, the company was accepted into Y Combinator's Spring 2026 batch and has processed over 10 million API requests since its beta launch.
Total raised
$2.2M
Last stage
Pre-seed
Investors
Vineet Agarwal
Joined JigsawStack as Founding AI Engineer in June 2025, based in India (Greater Kolkata Area). Co-author on the Interfaze arXiv paper alongside Harsha and Yoeven. Previously worked at DevKit as a software engineer and has built apps with 2,000+ worldwide users.
LinkedInYoeven D Khemlani
Second-time founder and technologist who began as a game developer before moving into startup and financial services leadership. Was CTO and co-founder of Stayr/Staytion, a Southeast Asia prop-tech and travel startup that scaled to $1M ARR in Year 1 and $3M ARR in Year 2 before being acquired. After the exit, identified the gap in reliable AI backend tooling and founded JigsawStack in January 2024. Trained his own models from scratch after finding GPT-3 (20% accuracy) and Llama fine-tunes (50% accuracy) insufficient, eventually reaching 80%+ accuracy.
LinkedInHarsha Vardhan Khurdula
Joined JigsawStack in March 2025 as Founding Applied AI Engineer and was promoted to CTO in October 2025. Leads AI/ML research at the company and volunteers as a peer reviewer for Springer Nature's Journal of Progress in Artificial Intelligence. Co-author of the Interfaze arXiv paper (accepted at IEEE CAI 2026), which presents the technical architecture underlying the Interfaze model.
LinkedInNo applications, no recruiter spam. Just the intro.
A few questions to make sure this role is the right shape for you. Two minutes.
I write the intro, send it to the founder, and handle the back-and-forth.
Teeranade Cheng
Listed as a founding engineer at JigsawStack per RocketReach company org data. No additional public LinkedIn profile found.
Abhinav K.
Listed as an employee on the Interfaze/JigsawStack LinkedIn company page. No additional public profile details available.
Yoeven D Khemlani
LinkedInHarsha Vardhan Khurdula
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.