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Hi, I'm Dan Gillis

Dan Gillis

Technology Leader at Dan Gillis, LLC

I am a passionate technology leader, engineer and drummer with 20+ years of working experience. Formerly, I lead the technology for Starwood Hotels’ storied loyalty program, Starwood Preferred Guest (SPG) until the merger with Marriott hotels. More recently, I have been consulting for a variety of retail and small to medium businesses to further their cloud, CRM and Loyalty endeavors. My current technology focus is in Go, particularly backend APIs.

Leadership
Team Work
Communication
Take criticism
Critical Thinking
Problem Solving

Recent Posts

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REST API Error Handling in Go - Part 2

I have recently updated the way I handle errors in Go. In some ways, I’ve come full circle back to where I started, in others, I think I’ve evolved. When I initially wrote my errors post in June of 2021, I had come up with a hybrid of Rob Pike’s upspin errors and Dave Cheney’s https://github.com/pkg/errors package. This hybrid works well, however, in December 2021 https://github.com/pkg/errors was archived and, generally, the Go community seems to have opted for a simpler option of adding proper error context and wrapping errors.

February 6, 2023 Read
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oplint: The op linter

I made a new linter called oplint! This was a really fun thing to do as I had never ventured into static analysis before. I created this tool to help me understand where an error originates without using the pkg/errors error stack functionality. The pkg/errors project has been archived and it seems the Go community has largely moved on to just wrapping errors using the standard library. I am moving away from using pkg/errors to use only the standard library as well, and am trying to make sure I can trace an error source in a standardized way.

January 11, 2023 Read
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Low-Dependency Database Migrations and Integration

A few weeks ago, I gave a presentation to the Boston Go Meetup on Low-Dependency Database Migrations and Integration, in which I discuss how I handle database migrations and database integration in the go-api-basic project that I’ve been working on. In the presentation I mention several tools that I use, so I wanted to add links to them here. Mage PostgreSQL JetBrains DataGrip sqlc The video for the talk is below:

March 15, 2022 Read