--- author: "Umesh Malik" canonical: "https://umesh-malik.com/author/umesh-malik" description: "Umesh Malik is a software engineer writing about AI, Claude Code, LLMs, OpenAI, Anthropic, and developer tooling. 121 articles on AI engineering and production systems." title: "Umesh Malik — Software Engineer, AI Builder & Writer" tokens: 1166 generator: "scripts/generate-page-markdown.mjs" --- ![Umesh Malik — Software Engineer, AI Builder & Writer](https://umesh-malik.com/images/umesh-malik.jpg) Author # Umesh Malik Software Engineer · AI Builder · Writer · Expedia Group Software engineer writing about AI, Claude Code, LLMs, OpenAI, Anthropic, and developer tooling. 121 articles on AI engineering, production systems, and the tools shaping modern development. 5+ years at Expedia Group, Tekion, and BYJU'S. Claude CodeAI Coding AgentsLLM EngineeringRAGFine-tuningOpenAIAnthropicNext.jsSvelteKitDeveloper Tooling [X(opens in new tab)](https://x.com/lumeshmalik) [LinkedIn(opens in new tab)](https://linkedin.com/in/umesh-malik) [GitHub(opens in new tab)](https://github.com/Umeshmalik) [Email](mailto:ask@umesh-malik.com) [Full bio →](https://umesh-malik.com/about) Google Search · Preferred sources ## Prefer this site on Google If you already read this writing, add umesh-malik.com as a Preferred Source. Google can then highlight it with a preferred badge in Top Stories, AI Overviews, and AI Mode — for you, not as a site-wide ranking boost. [Open in Google Search(opens Google Preferred Sources in a new tab)](https://www.google.com/preferences/source?q=umesh-malik.com) ## Recent Articles 121 total [All articles →](https://umesh-malik.com/blog) [![Dashboard-style cover for reducing a Rust struct's memory footprint, showing five layout techniques and a 953-to-420-byte result](https://umesh-malik.com/blog/reduce-rust-struct-memory-footprint-cover.png) Web Engineering • Sep 4, 2026 ### How to Reduce Rust Struct Memory Footprint: 5 Techniques, 56% Smaller How to reduce Rust struct memory footprint: the 5 layout changes that shrank a real cache entry from 953 to 420 bytes, and what each one costs. 10 min read Read more →](https://umesh-malik.com/blog/reduce-rust-struct-memory-footprint) [![Migration flowchart showing OpenAI Python SDK moving from httpx with certifi to httpx2 with OS trust store](https://umesh-malik.com/blog/openai-python-httpx2-migration-guide-cover.png) LLM Engineering • Aug 29, 2026 ### OpenAI Python HTTPX2 Migration: Fix the TLS Trap First The OpenAI Python HTTPX2 migration breaks certifi TLS in containers and proxies. The full checklist, OS trust store fix, and legacy escape hatch. 6 min read Read more →](https://umesh-malik.com/blog/openai-python-httpx2-migration-guide) [![Cover showing the PCIe bottleneck in traditional GPU-NIC architecture versus MTIA 300's built-in NIC design that delivers 1.2 TB/s without CPU mediation](https://umesh-malik.com/blog/eliminate-pcie-bottleneck-ai-training-cover.png) AI Engineering • Aug 25, 2026 ### Fix the PCIe Bottleneck in AI Training: How Built-in NICs Work Fix the PCIe bottleneck in AI training with built-in NICs. Meta's MTIA 300 reclaims 1.2 TB/s by eliminating host CPU mediation. 9 min read Read more →](https://umesh-malik.com/blog/eliminate-pcie-bottleneck-ai-training) [![The flow from prompt to invisible watermark: Paint sends a prompt to Microsoft's moderation server, receives a GUID, runs local inference, then embeds that GUID into the pixels](https://umesh-malik.com/blog/ms-paint-invisible-watermark-guid-cover.png) AI Security • Aug 25, 2026 ### MS Paint Invisible Watermark: How to Find the GUID in AI Images The MS Paint invisible watermark embeds a server GUID into every AI image — even when inference runs locally. Here's how to detect it. 8 min read Read more →](https://umesh-malik.com/blog/ms-paint-invisible-watermark-guid) [![Cover showing the inference engine attack surface with token stream flowing from model through vulnerable parser to arbitrary code execution, and the defense architecture separating GPU host from token parsing](https://umesh-malik.com/blog/secure-llm-inference-vllm-cve-2025-9141-cover.png) AI Security • Aug 25, 2026 ### How to Harden vLLM Inference: CVE-2025-9141 Defense Guide How to harden vLLM inference against token exploits. CVE-2025-9141 let models run code via eval(). Separate GPU hosts from parsers. 9 min read Read more →](https://umesh-malik.com/blog/secure-llm-inference-vllm-cve-2025-9141) [![Chart showing ChatGPT Search site-scoped query share jumping from 0.3% to 17% on August 8, 2026](https://umesh-malik.com/blog/chatgpt-search-site-scoping-geo-cover.png) LLM Engineering • Aug 24, 2026 ### ChatGPT Search Optimization After the Site-Scoping Shift ChatGPT search optimization changed when 17% of queries started scoping to specific sites. What the GPT-5.6 shift means and how to get cited. 7 min read Read more →](https://umesh-malik.com/blog/chatgpt-search-site-scoping-geo) [View all 121 articles →](https://umesh-malik.com/blog)