Oleksandr Yaremchuk
Co-Founder & CTO at Manifold Security
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolOleksandr Yaremchuk is a seasoned software leader and founder with over a decade of experience building scalable, production-ready systems across startups, scaleups, and enterprise environments. Currently Co-Founder & CTO at Manifold Security, he brings deep expertise in AI agents security and LLM safety—having led the development of LLM Guard and driven millions of detector downloads prior to acquisition. He blends hands-on engineering (from PHP and Golang microservices to Kafka and ML deployments) with a strong ownership mindset and three years of people-management experience, including managing managers. At HelloFresh he improved system reliability and latency while expanding teams into data and frontend domains; at TourRadar and earlier startups he introduced Golang and modern search architectures. Known for optimizing processes and shipping pragmatic, high-quality solutions, he also retains a practitioner’s curiosity—contributing to open-source LLM security tooling that attracted meaningful community adoption. Based in Berlin, he pairs entrepreneurial grit with systems-level thinking to secure AI runtimes and scale engineering organizations.
12 years of coding experience
14 years of employment as a software developer
Master's degree, Software Engineering, Master's degree, Software Engineering at Chernivci National 'Juriy Fedkovyc' University
English, Ukrainian, Russian, German
Github Skills (26)
transformers10
prompt-injection10
chatgpt10
python10
langchain10
open-source10
typescript10
large-language-models10
llm10
security10
prompt-engineering10
adversarial-machine-learning10
wysiwyg10
openai10
llmops10
Programming languages (4)
Github contributions (5)
asofter/yii2-imperavi-redactor
Dec 2013 - May 2020
Imperavi Redactor WYSIWYG widget (OEM-licensed for Yii 2)
Contributions:1 release, 55 commits, 20 PRs in 6 years 5 months
wysiwygyii
protectai/llm-guard
Aug 2023 - Sep 2025
The Security Toolkit for LLM Interactions
Contributions:88 reviews, 116 PRs, 412 pushes in 2 years 1 month
llmsecuritylarge-language-modelschatgptsecurity-tools
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