noi tier
noi tier

Lead Applied AI Researcher / LLM Engineer

Open to offers · Member since 30 Sep 2026
Location
Bansko, Bulgaria
Desired salary
Unspecified
Work preference
Remote Only / Part Time, Freelance
Experience level
Lead

About

Professional summary

I am an applied AI engineer and former CTO with more than 10 years of R&D and production engineering experience. I specialize in transformer, LLM, retrieval, ranking, and multimodal machine learning systems across text, audio, tabular, and clinical data.

I currently own a production agentic RAG pipeline and its fine-tuning roadmap. My work includes multi-step reasoning, cross-encoder reranking, section-aware document parsing, evaluation harnesses, and reliability improvements for LLM outputs.

I have hands-on experience with PEFT, LoRA, QLoRA, Llama-3, Mistral, Hugging Face, PyTorch, and TensorFlow. I balance research quality, scalability, and ROI when moving AI solutions from experimentation to production.

I have collaborated closely with academic researchers, clinicians, external clients, and national-security research teams. My projects include clinical risk prediction, audio stroke detection, legal semantic search, cybersecurity data analysis, and NLP classification systems.

As a former CTO and technical lead, I have led multidisciplinary teams and delivered end-to-end platforms. I am comfortable owning ambiguous problems from ideation through architecture, implementation, evaluation, and production deployment.

I also mentor machine learning and statistics practitioners, including PhD students. My background combines applied research leadership, engineering execution, and a strong focus on measurable model quality and system reliability.

Skills

28 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Data Stores

Languages & Frameworks

Libraries

Monitoring

Experience

Career history

Lead Applied AI Researcher Advanced Genomics Initiative, NDA

I architect and operate a production agentic RAG system using LangChain, multi-step reasoning, cross-encoder reranking, and section-aware parsing. I continue to evaluate agents, tool use, and alternative RAG approaches.

I built quality-stabilization harnesses to keep LLM outputs statistically grounded. I lead hybrid PEFT/RAG fine-tuning with QLoRA, Llama-3, and Mistral on medical corpora, improving consistency by 30%.

I own the multi-year roadmap from ideation through production in a part-time engagement.

Principal AI Researcher Bar-Ilan University & Tel Aviv University

I worked with academic researchers and clinicians on blood-test risk prediction and audio stroke detection. For risk prediction, I identified temporal leakage in a failing baseline and compared GBDT and FT-Transformer ensembles, achieving 80.2% pAUC.

For audio stroke detection, I achieved 86.7% AUC and a 24% relative improvement over baselines. I served as Technical Architect on a 2M NIS grant and led PhD candidates and engineers, enabling four publications and projects.

I also delivered freelance LLM-based cybersecurity data analysis for an external national-security research institute.

Senior Data Scientist (NLP) LitiGate & Culture Trip

I developed legal retrieval and ranking systems using SBERT, citation graphs, LDA, and triplet loss. I also built a transformer-based quality classifier and travel-domain NER models that improved F1 by 38%.

I built Elasticsearch semantic-search infrastructure with embeddings and custom crawlers. I also delivered an end-to-end R-based data exploration tool.

Tech Lead & Full-stack Engineer / CTO Empowered, Salead & Adotomi

As CTO at Empowered, I led a team and built an end-to-end platform using Java EE, MySQL, Bootstrap, AWS, and Linux. The platform included CNN pipelines, production guardrails, and deterministic fallbacks.

At Salead, I developed a full-stack platform with Java EE, MySQL, Bootstrap, and SoftLayer, including a semantic search engine, knowledge graph, and Nutch-based crawling. At Adotomi, I built REST APIs and analytics for a Facebook campaign-management platform.

Software Engineer / Machine Learning Developer Stealth-Mode Startup & Freelance

I built a Java Swing/J2EE platform and web scrapers for startup and freelance projects.

I also developed forex prediction models and gained early experience building end-to-end software and data-driven systems.

Education

Learning history

Bar-Ilan University

B.Sc. Computer Science & Applied Mathematics, Computer Science and Applied Mathematics

Completed a Bachelor of Science in Computer Science and Applied Mathematics. Also completed one year of M.Sc. coursework.

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