Bharath Preetham on Tal
Headline
Lead Software Engineer @Cohere Health | Ex-Principal Engineer @ Eli Lilly | GenAI, Agentic Systems, RAG & Cloud-Native Platforms
About
Principal Engineer with 9+ years of experience designing and scaling cloud-native platforms, AI systems, and data-intensive applications. Specialized in GenAI, Agentic AI, RAG architectures, AI platform engineering, and distributed systems, with a proven track record of taking enterprise AI solutions from prototype to production in regulated environments. At Eli Lilly, I built an AI-powered data access platform that enabled business users to query enterprise databases using natural language, reducing time-to-insight from hours to seconds. By combining dense vector search, hybrid retrieval, and reranking techniques, the platform achieved 92% SQL accuracy across 300+ validation scenarios while reducing LLM token consumption by 65%. I also designed a multi-agent orchestration framework using LangGraph, enabling autonomous task decomposition, tool execution, and self-correction, reducing human intervention by over 70%. My experience extends beyond GenAI into platform engineering and observability. I led the implementation of a centralized observability platform supporting 150+ business-critical applications, reducing MTTR by 30%. I also modernized workflow orchestration and cloud infrastructure, delivering approximately $350K in annual savings through platform and CI/CD optimization initiatives. Earlier in my career, I built large-scale AWS-based data platforms for smart meter analytics, processing millions of records daily, and developed event-driven data onboarding solutions that significantly improved operational efficiency through automation and NLP-driven workflows. Core Expertise: • GenAI & Agentic Systems • LLM Applications, RAG & Retrieval Engineering • AI Platform Engineering & MLOps • AWS, Kubernetes & Cloud Architecture • Data Engineering & Distributed Systems • Observability, Reliability & Platform Operations I enjoy building AI and platform solutions that are not only technically sophisticated but also scalable, reliable, and capable of delivering measurable business impact.
Work experience
Lead Software Engineer at Cohere Health, Apr 2026 - Present · 5 mos
Principal Engineer - Data and AI Platforms at Eli Lilly and Company, Dec 2022 - Apr 2026 · 3 yrs 5 mos, Bengaluru
Associate 2 - Data & AI at PwC Acceleration Centers, Oct 2021 - Nov 2022 · 1 yr 2 mos, Bengaluru
Analyst - Data & AI at Cognizant, Apr 2018 - Oct 2021 · 3 yrs 7 mos, Chennai
Founding Member at Stealth Startup, May 2017 - Apr 2018 · 1 yr, Contributed to validating an early-stage crypto influencer marketing marketplace connecting Web3 companies with social media influencers. Executed manual MVP and product-market fit (PMF) experiments by brokering pilot promotion deals via email and Telegram channels. Coordinated between crypto companies and influencers to define campaign scope, pricing, and delivery expectations. Collected structured feedback from both sides to refine the value proposition and marketplace workflow prior to product development.
Education
Bachelor of Technology, Electrical and Electronics Engineering, JNTU Anantapur
