Edward Hayes

$ Integration & Internal Tools Developer

GitHub contribution graph for edward-hayes — over 1,000 contributions in the last year
1,000+ contributions in the last year · github.com/edward-hayes

## summary

Client configuration developer with three years writing Go applications that extend the core product. Specializes in CLI and data tooling for onboarding, including a top tool used about 750 times a week and the parsers that bring new accounts onto the platform. The work has recuperated an estimated millions in revenue through churn saves and onboarding improvements.

## education

Bachelor of Science, University of Wisconsin Class of 2012

Math · Physics · Astronomy

Coursework

  • iOS & Swift — Complete App Development Dr. Angela Yu, Udemy
  • 100 Days of Code: Complete Python Pro Bootcamp Dr. Angela Yu, Udemy
  • SQL & PostgreSQL — Developers Guide Stephen Grider, Udemy
  • Building Modern Web Applications With Go Trevor Sawler, Udemy

## design philosophies

  • Gang of Four design patterns
  • deep APIs over wide ones
  • reviews O(N) complexity
  • table-driven unit tests
  • unit tests don't replace manual testing — both are needed
  • an AI-driven developer, not a vibe coder: AI extends humans, it doesn't replace them
  • over time, thoughtful development is faster than “fast” development
  • code should be DRY — don't repeat yourself

## projects

xcli

Go ↗ GitHub

A Go (Cobra) command-line tool built on the Lightspeed REST and GraphQL APIs, running custom reports, data remediation, and bulk admin work through 50+ commands across products, customers, sales, gift cards, loyalty, store credit, and suppliers. Heavily used by customer org teams at roughly 750 sessions a week, it is responsible for countless churn saves and reduced onboarding leakage — an estimated millions of dollars of recuperated revenue. Its value spawned a six-month, multi-team initiative to bring the core product up to parity with xcli's offerings.

My Contributions Lead development of the tool, having rewritten about 85% of the codebase and added 38k lines in the past year.

sheet-tools

Go

A Go (Cobra) command-line application for spreadsheet work that Excel and Google Sheets can't do, built around six commands. The standout, merge-sheets, joins files on dynamic headers that need not match in order or exactly. Other highlights: display, which renders a spreadsheet's contents in a web browser, and collapse-rows, which merges similar rows of a heterogeneous CSV by user-set criteria.

My Contributions Built all six commands.

otto

Go

A Go microservice and library for AI-assisted data mapping and formatting, exposed through a single call, otto.MagicallyFormat. It takes a messy file and a target object whose fields carry descriptions and examples, and returns that object populated with a confidence score.

My Contributions Designed the pipeline end to end: detect headers with a swappable AI model, merge across files via sheet-tools, sample rows to choose the right transforms, then map each header to a target field and report confidence. Accepts CSV and XLSX, with a PDF path that uses AI as an OCR step to produce structured CSV first.

## experience

Lightspeed Commerce Inc 2019 – Present · 7 yrs 6 mos
  1. Manager, Support Developer, Imports Jul 2024 – Present · 2 yrs
    • Lead a team of 12 data-import specialists responsible for migrating client data into our system.
    • Primary developer of the import tooling, used 750+ times weekly; adoption has spread beyond the import team across several departments.
    • Built a product importer that outperformed the native feature, prompting a six-month company effort to bring the core product to parity with the tool.
    • Built parsers for file-led data migrations from our top competitors, greatly improving our ability to onboard clients from them.
    • Contributed 38k lines in the past year.
    • Mentor an Implementation Developer, reviewing his code and guiding his design decisions.
    • Reduced global onboarding leakage by 5%.
    • Built the business case that won leadership investment and new headcount, creating the Implementation Developer role.
    • Built the business case for bringing the core product to parity with my tooling; interfaced with four dev teams, contributing to roadmap and PRDs.
  2. Intern, Software Engineering, iOS Retail Mobile Feb 2024 – Jul 2024 · 6 mos
    • Solved several bugs including a “top5” issue identified as critical by support, and made improvements to “errored sales.”
    • Expanded the scope of the Workflows feature and fixed a UI issue in it. Workflows is an enterprise feature used by accounts in our “ideal customer profile.”
  3. Manager, Support Escalations Jan 2022 – Feb 2024 · 2 yrs 2 mos
    • Revitalized several long-neglected support tools, including a REST API command-line tool, a Chrome extension, and a login/debug path on the iOS register — fixing bugs and adding functionality.
    • Developed Python and Go scripts to resolve specific behavioral issues for retailers, expanding the range of support services on offer.
    • Built and led a 15-person technical escalation team, instituting bug tracking, incident management, and a KPI structure.
  4. Tech Lead Mar 2020 – Jan 2022 · 1 yr 11 mos
  5. Technical Support Specialist, QA & Beta Sep 2019 – Mar 2020 · 7 mos
  6. Frontline Support Jan 2019 – Sep 2019 · 9 mos