Raj Kumar
Rails Tech Lead at Sycamore – putting LLM agents on regulated production Rails.
Toronto, Canada
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Tech Lead at Sycamore Informatics, shipping production LLM agents across an 8-product Rails ecosystem for regulated clinical-trial data. Sycamore is the market leader in clinical trial data science, serving 10 of the Top 20 Global Pharma — AbbVie, BMS, Bayer, Daiichi-Sankyo, CSL, Genmab, Alcon. Scale: 2,000+ TB, 10,000+ active users, 100+ regulatory submissions.
15+ years across Rails platforms, AI-driven engineering, and technical leadership. Former Director of Engineering at Safyre Labs, where he ran the multi-brand B2C ecommerce platform behind Jewlr, Lee Fiori, and ONE+ONLY (1M+ customers). Earlier: AI-driven initiatives at Mars, Inc., Etsy, and IKEA; Rails/AWS delivery for Bossa Nova Robotics, HackerRank, Agero, etc.
Currently focused on the intersection of LLM agents and regulated production Rails — fails-closed customer-environment resolvers, idiom-aware skill-layer invariants, version-pinned code reads. SOC 2 Type II, ISO 27001, HIPAA, ICH-GCP, CDISC, FDA/EMA/PMDA-aligned.
International conference speaker & tech paper author. Recent: PHUSE EU Connect 2025, PHUSE SDE Shanghai 2025, CDISC US 2025, Toronto Ruby 2024, Toronto DevOps Exchange 2023.
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Rails Idioms That Break Your AI Agent
You asked your LLM agent to speed up a folder-move operation in Rails. It writes the textbook idiomatic answer. A whole folder tree goes invisible to its users the next day.
Not a Rails bug. Not a Claude bug. Rails and Claude each did the idiomatic thing, and the idioms collided.
I'll walk three real production incidents from our regulated clinical-trials Rails fleet where this happened – around ActiveRecord callback chains, AR-backed job queues treated as ordinary ActiveRecord tables, and Rails's transaction-by-default. Each trap fires specifically because of the Rails idiom; the convention chain IS the failure surface.
Side-by-side: our actual Rails source, the agent's actual first-pass draft, the skill-layer invariant that catches it before it ships.
Raj Kumar
Rails Tech Lead at Sycamore – putting LLM agents on regulated production Rails.
Toronto, Canada
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