I'm Gagan Deep Singh, a software engineer who thrives at the intersection of enterprise scale and startup speed. I currently work as a Software Architect at Marriott International, building systems that serve millions of users worldwide.
I'm also a Founding Engineer at Xylo AI, where we're building an AI-powered customer insights platform from the ground up, doing full-stack development with a focus on ML pipelines and real-time analytics.
Outside of work, I'm building GLINCKER , a social-commerce platform, and contributing to open-source projects like GeoKit and Glin Profanity.
I write about software architecture, AI engineering, and lessons learned from building at scale. When I'm not coding, you'll find me exploring new technologies or mentoring junior developers.
My sites
Recent Posts
View allLocal-First Is Here, Loudly: Why Three of My Products Made the Switch
For years I dismissed local-first as a correctness-obsessed ideology. In the last twelve months three of my products adopted it, and the reasons were not what the manifestos said they would be.
The Pricing Tier I Deleted and What Happened Next
I had a $9 Starter tier on one of my tools for eighteen months. Deleting it was the best pricing decision I made last year. Here is the math, the customer impact, and the lesson I am now applying to every other product.
The Auth Tax: Why I Stopped Rebuilding Login Flows for Every Product
Every product I shipped in year one reimplemented auth. Year two I started extracting it. Year three I built my own service. Here is what that path actually cost, and when you should follow it.
MCP Is the Actually Interesting AI Protocol of 2026
Everyone's chasing foundation models and agent frameworks. The quieter story is a protocol that's becoming the USB-C of AI tooling, and most devs are still sleeping on it.
I Built a List of 284+ Modern CLI Tools (and What I Learned)
How I went from bookmarking random GitHub repos to curating a list that hit 150+ stars on day one.
Open Source
Experience
Software Architect
Marriott International
Building and scaling enterprise software systems for one of the world's largest hospitality companies.
Founder & Lead Architect
GLINCKER / GLINR Studios
Building an all-in-one platform with URL shortening, QR codes, AI moderation, and GLINR Studios developer tools suite. 10+ npm packages published.
Founding Engineer
Xylo AI
Building AI-powered customer insights platform. Full-stack development with focus on ML pipelines and real-time analytics.
Software Engineer
Ameriprise Financial
Built fintech solutions at enterprise scale. Modernized legacy systems and improved platform reliability.
Education
M.S. Software Engineering
University of St. Thomas
What People Say
“Gagan is the kind of engineer who sees the full picture, from system design to developer experience. His open-source work on GeoKit and glin-profanity shows the depth of his thinking.”
A.R.
Staff Engineer, Fortune 500 Tech
“Working with Gagan on GLINCKER was like having an architect and a builder in one person. He doesn't just plan systems. He ships them.”
M.K.
Product Designer, GLINR Studios
“His npm packages are some of the most thoughtfully designed tools I've used. The documentation is clear, the APIs are clean, and everything just works.”
S.P.
Full-Stack Developer, Open Source Contributor
Technologies
Publications
Parsing 11 languages in pure Go without CGO: how I replaced regex with a tree-sitter runtime
DEV.toI tested 4 codebase-to-AI tools on FastAPI (108k lines). Here are the token costs.
DEV.to$0.60 per session, just on orientation. Here is what my AI agent was doing before writing any code.
DEV.toI Built a Self-Hosted AI Agent That Runs on a Raspberry Pi
DEV.toWhy I stopped uploading files to random websites (and what I use instead)
DEV.to5 open source auth libraries that actually handle AI agents (2026)
DEV.toAdd auth to your AI agents in 5 minutes with KavachOS
DEV.toBuild Your First MCP Server in 20 Minutes
DEV.toI Tested Every Open-Source Brand SVG Library So You Don't Have To (2026 Edition)
DEV.toI Got Tired of Hunting for SVG Logos. So I Open-Sourced 4,000 of Them
DEV.toWe Cut 70% Bundle Size: TanStack Query + Zustand at GLINR
DEV.to