Director of Software Engineering · Ticketmaster

Juan G. Diaz

I lead the mobile and SDK teams behind Ticketmaster’s apps, building ticketing experiences for millions of fans worldwide.

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Los Angeles, California

Juan G. Diaz

Where I’ve built

How I lead

01

Clear direction

I partner with Product on a concrete, well-specified roadmap tied to OKRs, so every engineer and stakeholder knows what we’re building and why, even when priorities shift.

02

People first

Mentoring, growing careers and hiring well are the job, not a side task. I make time for people and build teams where everyone is comfortable raising ideas and problems.

03

Engineering excellence

Architecture and practices that scale: modern Kotlin codebases, faster CI/CD, shared quality standards and SDKs that partners can integrate with confidence.

Before moving into management I spent more than a decade as a hands-on engineer, from .NET web platforms to Android apps for ESPN, Headspace, Univision and Comcast.

Recommendations

All 39 on LinkedIn →

“I genuinely enjoyed working under Juan at Ticketmaster and he is a director who genuinely shaped both the mobile architecture and the people around it. He managed a large team across iOS, Android, React Native and QA, building mobile applications and SDKs that end up in the hands of millions of users.”

Vishwak ReddySr. iOS Engineer, Ticketmaster · Reported to Juan · 2026

“I’ve had the pleasure of working with Juan for a number of years, and he is genuinely one of the most approachable and supportive leaders I’ve worked with. No matter how busy he was, he always made time for people, listened carefully, and created an environment where everyone felt comfortable sharing ideas and challenges.”

Rebecca HowardEngineering Director, ex-Ticketmaster · 2026

“Juan brought a level of expertise and leadership to the Android team that was immediately felt. He wasn’t just technically strong, he was the person in the room who could cut through ambiguity and help the team find a clear path forward.”

Etienne LawlorSenior Android Engineer · Worked with Juan at Headspace · 2026

“I was particularly impressed by his ability to handle even the toughest User Stories — effortlessly — and provide recommendations to overcome blockers. … As a team member or a leader, Juan earns my highest recommendation.”

Nicholas BeckProduct Director · Worked with Juan at Univision · 2016

“He took the initiative in using Crashlytics to identify specific memory leaks that were impacting the performance of our app. Once these issues were identified and fixed, the number of crash-free sessions increased to 95%. Our Android app has consistently had 5 star reviews.”

Amy O’NealProduct Owner · Worked with Juan on the same team · 2015

“He has proven himself time and again to be a valued and essential member of every team he has been on. … I look forward to one day working with Juan again and highly recommend him to anyone who is looking for a highly knowledgeable and enthusiastic developer to join their team.”

Maryanne WeaverScrum Master / Product Owner · Managed Juan at Institute for Integrative Nutrition · 2015

“It takes a special kind of person to satisfy a myriad of requests from users, to overcome the limitations of the technology and to understand the complexity of the code all while remaining calm, thoughtful and diligent throughout the process. Juan is that kind of person.”

Patrick MillerManaged Juan directly · 2010

“I have worked with Juan at eMarketer for years. … When I give a job to Juan, I know it will be done right, and if tweaks are required, he makes it a priority to finish the job completely before moving on.”

Dana HillSenior Product Manager, eMarketer · 2010

Experience

2021 – Present

Ticketmaster

Los Angeles

  • Director, Software Engineering – Mobile Apps

    April 2023 – Present

  • Senior Manager, Software Engineering – Mobile Apps and SDKs

    August 2021 – April 2023
  • Lead and mentor a 20+ person organization across mobile apps and SDK development.
  • Partner with Product Management on an engineering roadmap tied to OKRs and delivery dates.
  • Lead architecture, design and cross-team technical decisions so solutions scale.
  • Drive recruiting to fill key roles quickly and well.
  • Work with SDK integrators to resolve issues and keep third-party integrations stable.
2019 – 2021

OpenTable

Senior Engineering Manager – Consumer Android

Los Angeles

Led Android development for the diner booking app.

  • Managed 6 direct reports (5 Android engineers and 1 QA engineer).
  • Drove engineering excellence work: moving the codebase from Java to Kotlin, speeding up CI/CD pipelines, and standardizing coding, QA and automation practices.
  • Partnered with project and delivery managers to hit 100% of our OKRs.
  • Defined structured recruiting, evaluation and promotion processes.
  • Organized off-sites for the 23-person mobile team.
2018 – 2019

Headspace

Senior Android Engineer

Los Angeles

  • Helped re-architect the app around MVP and Clean Architecture with unit tests, and started the move to Kotlin.
  • Worked with Google on special projects that featured the app.
  • Localized the app into German, French and Spanish, working with backend engineers so content was served correctly.
  • Rebuilt the Google Play Billing integration and the upsell and free-trial screens, with A/B testing.
2017 – 2018

ESPN

Software Engineer III – Connected Devices

Los Angeles

  • Built ESPN apps for Android and Xbox.
  • Enhanced internal SDKs shared across multiple Android apps: ExoPlayer video for live and on-demand, MVPD sign-in with Adobe Pass, and Comscore, Nielsen and Conviva tracking.
  • Worked on special projects: Amazon Alexa integration, MVPD single sign-on, the TV channel guide and the “On Now” row.
  • Helped bring ESPN+ to Android and Xbox.
2017

Crush & Lovely

Senior Android Developer

New York

  • Built a full-featured Android app for Comcast with ViewModels, RxJava, Retrofit 2, thePlatform video player and Iris WebRTC.
2015 – 2017

Univision Communications

Lead Android Developer

New York

  • Lead mobile developer for the Univision, Deportes, Noticias and Uforia apps.
  • Worked with vendors and offshore developers, setting technical guidelines and reviewing code.
  • Helped architect the shared Univision framework library: ads (Yieldmo, DFP, FreeWheel), live and on-demand video (ExoPlayer, NeuLion, Ooyala), Adobe Pass MVPD, article and slideshow UI, image caching (Picasso, Glide, LRU), networking (Volley) and analytics (Comscore, Nielsen, Firebase/Google Analytics, Tealium, New Relic, Crashlytics).
  • Helped set up Jenkins, the GitHub branching strategy, deep linking and app indexing.
  • Built server-side APIs in Java.
2012 – 2015

Institute for Integrative Nutrition

Senior Software Developer (.NET C#) / Android

New York

Android · 2013 – 2015

  • Developed and maintained the Learning Center and HCTP Course Android apps, which deliver audio, video with closed captions, PDFs and course material to students. Guided a third-party vendor, reviewed code and released to Google Play.

.NET · 2012 – 2013

  • Built core components of several systems in C# and ASP.NET (MVP, 3-tier architecture, SQL Server 2008 and stored procedures).
  • Led the integration of a Drupal-based LMS with a .NET payment system, coordinating web services across teams.
  • Contributed to an iOS app and C# web services, and often served as Scrum Master.
  • Advised on moving servers to high-availability, load-balanced virtual infrastructure at Datapipe.

Earlier career

2010 – 2012

TMP Worldwide

Technical Lead Developer

Details
  • Led 4 offshore developers on several .NET 2.0 applications, writing requirements and technical specs and scheduling the team’s work.
  • Rebuilt search with Solr, and prototyped the overhaul of a legacy web app with .NET MVC.
2007 – 2010

eMarketer

Software Developer

Details
  • Built management systems in C#, ASP.NET, SQL Server and Ajax, and helped migrate the databases from SQL Server 2000 to 2005.
  • Built a custom reporting app on Endeca and an email distribution tool on the Listrak API (PHP and ASP.NET).
  • Won a WebAward for Outstanding Achievement in Web Development.
2006 – 2007

BarnesandNoble.com

Web Producer

Details
  • Lead technical producer for the Home & Office, BN Jr, Toys & Games, Meet the Writers and Libros en Español sections, built with ASP, HTML, CSS, JavaScript and XSLT.
  • Worked with design and editorial teams on content, graphics and features.
2006

NYC Human Resources Administration (HRA MIS)

IT Specialist / QA Tester Intern

Details
  • Wrote and ran NUnit test scenarios and regression tests for case-management software.
  • Supported staff through the help desk, and fixed ASP.NET pages and Crystal Reports.

Military service

2001 – 2009

United States Army Reserve

Human Resources Specialist (MOS 42A)

  • Deployed to Kuwait from November 2003 to February 2005 in support of Operation Iraqi Freedom.
  • Processed promotions, awards, personnel accounting and transitions, and evaluated soldiers for special assignments and deployments.
  • Awards include the Army Achievement Medal, Global War on Terrorism Expeditionary and Service Medals, and the Armed Forces Expeditionary Medal.

Education

  • MA, Computer ScienceBrooklyn College, CUNY · 2007 – 2009
  • BS, Computer and Information ScienceBrooklyn College, CUNY · 2001 – 2006
  • Certificate, Android Application DevelopmentPace University · 2013 – 2014
  • Advanced Android App DevelopmentNYU School of Professional Studies · 2014

Languages

  • EnglishNative
  • SpanishNative
  • PortugueseLimited working
  • RussianElementary

Side project

Line Thief A block puzzle duel I designed and built: share one tray, finish lines, steal your rival’s blocks.
See the game →

Contact

Let’s talk about mobile engineering, leadership or building SDKs people love to integrate.

me@juangdiaz.com Connect on LinkedIn