AI Research Intern – Lexsi Labs
Commitment: Full-time internship (6 months; potential extension or full-time offer)
Start Date: Rolling

About Lexsi Labs:

Lexsi Labs is a frontier AI lab building aligned, interpretable, and safe superintelligence. Our research spans post-training alignment, mechanistic interpretability, AI safety, inference systems, agents, uncertainty quantification, and tabular foundation models. We focus on advancing new methods in effective reinforcement learning, circuit-guided model interventions, safety-aware fine-tuning and unlearning, interpretable telemetry, agentic workflows, and related areas of foundation model research. Work at Lexsi is grounded in both scientific depth and practical experimentation, with an emphasis on building robust methods, open-source tools, and impactful research contributions.

As an AI Research Intern, you will work closely with our research and engineering teams on high-impact problems across the model lifecycle — from training and post-training, to inference, safety, interpretability, and deployment.



This internship is structured across two tracks: a Research Science track and an Applied Science track, with some flexibility depending on background and area of focus. The Research Science track is oriented toward advancing core methods and deeper experimentation across areas such as alignment, interpretability, safety, and foundation model research. The Applied Science track is oriented toward building and deploying robust systems, translating research into practical workflows, product capabilities, and production-ready infrastructure. Across both tracks, you will be expected to contribute both experimentally and practically: building prototypes, running evaluations, writing production-quality code, and helping translate research ideas into deployable systems. This role is designed for candidates who are excited by both scientific depth and end-to-end execution.

What You’ll Do :

• Post-Training Alignment & F

📌 AI Research Internship (India)
🏢 Lexsi Labs
📍 India