Open to opportunities

Lefteris Tsegkos

@lefteristsegkos

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I build production software and fine-tune LLMs for real-world products.

Greece

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What I'm looking for

I’m looking to move from industry ML engineering toward direct work on AI alignment and safety problems, while continuing to build and deploy practical machine-learning systems.

At TheCube, I maintain and extend five production B2B SaaS products across React Native, Laravel, PHP, and supporting infrastructure.

I trained and deployed the company’s first ML feature for Revyo.io: a sentiment-analysis model for hotel reviews. I owned the Qwen 3 14B model end-to-end, from preparing a roughly 50 GB public review corpus through full-parameter fine-tuning, qualitative evaluation, and production deployment.

I work across API design, data modelling, mobile UI, and infrastructure, using Python, TypeScript, PHP, Docker, Kubernetes, Linux, SQL, and Git.

I’m also independently studying AI alignment and safety research, including Anthropic’s work on Constitutional AI, Sleeper Agents, and interpretability. I’m working toward direct contribution to alignment problems while building practical ML systems in industry.