Jergu1 Lejko
Co-founder & CTO building AI-native search infrastructure
San Francisco, California
Joined March 2025
Network
504 connectionsJHTVTG
JKLDGJ
MGJPEK
ASKBAL
HSIAIK
MKIFSW
MCVD
Summary
Founder and AI-search CTO: co-founded TopK to build an AI-native hybrid search engine that unifies vector, keyword and faceted retrieval, and leads the company's technical product direction. topk+2
Developer tooling and infrastructure experience: progressed at Pinecone into senior and staff engineering roles focused on developer tooling, CI/CD optimization and cloud infrastructure across major hyperscalers. aicouncil+1
Full-stack product engineering and team leadership: a background of hands-on full-stack development and technical leadership across startups and product teams (ContracTool, Parrot, KBS Development, Code Fire), combining frontend and backend experience with operational tasks. jerguslejko+1
Active open-source developer and writer: publishes technical and personal blog posts, contributes to open-source hardware/software projects (keyboard tooling), and speaks at community events about engineering and developer experience. dev+2
Work
Education
Projects
Writing
PERSONAL: UOB, here I come.
September 1, 2017Personal blog post announcing enrollment in the University of Bristol Computer Science course and reflecting on education goals.
Web Developer without a Web server
July 1, 2017Personal blog post describing moving static sites to GitHub Pages and using Cloudflare, reflecting on static site generation and deployment practices.