Software engineer on Dexcom’s App Compatibility team, where I test, release and automate changes to the configuration that decides which phones, OS versions and app versions Dexcom’s mobile apps support. Outside work, I lead Thaw, an open-source macOS app with 12.7k GitHub stars and 500k+ downloads, supported by Vercel’s open-source program. Since June 2026, I run the project end to end: technical direction, engineering, releases and community.
Mexico, remote · Spanish (native), English (fluent) · diazdesandi@proton.me
Experience
Thaw Project Lead, open source
Feb 2026 – Now
Project Lead since Jun 2026 · Core Maintainer, Platform, QA & DevEx, Feb – Jun 2026
Open-source macOS menu bar manager: 12.7k stars, 500k+ downloads, 77 contributors, 20 languages. Its top contributor, with 171 of its 602 merged pull requests, and 299 merged pull requests across 13 of the organization’s repositories.
Lead engineering and release operations across the organization since June 2026: priorities, roadmap, release approvals and contributors.
Designed and built the CI/CD and release pipeline for both apps: Developer ID signing, notarization, DMG packaging and Sparkle updates on stable, beta and alpha channels. Shipped 25 releases in 8 weeks on it.
Took releases to SLSA v1.0 Build Level 3 (attested builds, Sigstore signatures, CycloneDX SBOMs) and Thaw to OpenSSF Best Practices Gold and Baseline Level 3, with a 9.3 Scorecard.
Added SonarCloud quality gates and Strix AI security checks on every pull request. Thaw now sits at 91% test coverage and 0.1% duplication.
Manage the GitHub organization with Pulumi and TypeScript (infrastructure as code), with drift detection, and wrote the shared GitHub Actions workflows, including notarized preview builds triggered by a PR comment.
Led the architectural rebuild of Thaw for macOS 27 after Apple’s changes broke its menu bar mechanism: a separate runtime package for the low-level menu bar work, with the next-generation app on top. Users had working alphas months before the OS shipped.
Handle developer relations: release announcements, community replies, and emails with partners and the programs that support Thaw.
Created Floe, a macOS launcher that runs unmodified Raycast extensions through a Bun host (195 stars, OpenSSF Silver and Baseline Level 3); built getthaw.app; and published the Thaw extension to the Raycast Store.
Dexcom Software Engineer
Oct 2024 – Now
Software Engineer since Jan 2025 · SDET Trainee, Oct 2024 – Jan 2025
I maintain the configuration that sets which phones, OS versions and app versions each Dexcom mobile app supports, and take each change from request to production. I also build the team’s internal tools and automation, manage stakeholders when needed, and take on whatever else the team needs.
Handle configuration changes end to end: intake, updates, testing in lower environments, and the change verification documents reviewed by QA and Document Control.
Built a Bun and TypeScript CLI that validates the configuration in CI, replacing manual checks of hand-edited JSON. It caught 20+ errors before they reached production.
Led the rewrite of the legacy Node.js testing CLIs in Bun and Vitest, cutting full regression runs from about 3 hours to under 5 minutes.
Built the team’s GitHub Actions workflows (artifact generation, SHA checks, cloud previews), running Google Cloud automation through the SDK instead of installing the CLI in every CI run, and maintain branch protection, permissions and security workflows across 4 repositories.
Coordinate releases with QA, approvers, Document Control, SRE and Cloud teams, then run post-deployment validation and incident triage with Google Cloud logs and Datadog.
Part of a team with a multi-year zero-rollback record.
Consistently close the most tickets on the team, and cover for the team lead when they’re away: triaging requests, setting priorities and distributing work.
Rewrote onboarding and taught internal TypeScript and GitHub Actions courses.
Outlier Software Engineer, AI Training & QA
Jul – Oct 2024
Wrote and rated coding tasks in Swift, JavaScript and TypeScript for RLHF, and reviewed other contributors’ tasks, correcting LLM code and prompts.
Atlas Molded Software Engineer Intern
Aug 2020 – Jan 2021
Built a Flutter and Firebase app that cut rework costs by 38%.
Open source
DockDoorSettings window redesign, performance work, and Reduce Motion and accessibility support.
Droppy Code7 merge requests: the Appearance pane, a provider refactor and a search containment fix.
CodexBarFixed display-change recovery that was corrupting menu bar managers.
Alsoraycast/extensions (the Thaw extension), shieldcn (OpenSSF badges), Homebrew/BrewUI (Spanish translation).
AI-assistedAgent orchestration, reverse engineering and implementation, with output verified against source, runtime behavior and tests; Agent Skills published for getthaw.app
QualityDatadog, Grafana, OpenTelemetry, SonarQube Cloud, FDA-sensitive change control
Education
2015–2021Tecnológico Nacional de México, Tijuana. B.Sc. Computer Systems Engineering (Ingeniería en Sistemas Computacionales). Data Science specialization.
Certifications
Sep 2025GitHub Actions (GH-200), Microsoft. Valid to Sep 2027.
Nov 2025Site Reliability Engineering Fundamentals, Google (Uplimit).
Sep 2025DevOps and Software Engineering, IBM.
Mar 2026Introduction to Medical Software, Yale University.
Awards
Vercel OSSThaw was selected for the Vercel OSS Program, one of about 140 projects accepted since April 2025.
Claude for OSSAccepted into Anthropic’s Claude for Open Source program as Thaw’s maintainer.
Product HuntThaw was featured.
Updated November 2026. Thaw figures from GitHub and getthaw.app.