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Isaac Tillema

Senior Engineer, Architect, and Leader

I architect systems, test automation, and CI/CD solutions that enable teams to ship faster without breaking trust.

About

Hey there! I'm Isaac, a Senior Quality Engineer and Architect based in Chicago, IL. I've spent the last six years in engineering and consulting leadership, architecting scalable test automation, optimizing CI/CD pipelines, and elevating brand equity by leading agile teams to consistently ship software people can trust.

Today I lead the QA practice at The Office of Experience, where my team and I architect automation for ecommerce and lead-gen engagements, build custom CI/CD deployment and reporting pipelines, and engineer an internal AI Testing framework that supports AI-native products and tools. I'm especially interested in defining QA-as-a-Service offerings that turn quality into a revenue lever rather than a cost center.

You can read the long version on my résumé.

In my personal time, you'll find me brewing and consuming an inordinate amount of espresso, cycling around the midwest, or spending quality time with my family.

Experience

  1. 2024 — Present
    The Office of Experience
    Quality Assurance Engineer Lead, Consultant
    • Architect and maintain Playwright frameworks in .NET/C# covering web, iOS, and Android across 4 concurrent client products; cut full regression from 8 days to 6 hours and more than doubled test throughput (2.2x).
    • Build custom CI/CD deployment and reporting pipelines on GitHub and Azure DevOps, giving delivery teams per-commit test feedback and reducing production defect leakage 36%.
    • Designed and shipped an internal framework for testing AI-native products, solving assertion against nondeterministic model output via trajectory vs outcome scoring, adopted across client projects and internal tools.
    • Lead a team of QA analysts and engineers; own technical direction, hiring, and code review for automation codebases.
    • Drove the org-wide OKR to productize QA into a standalone service line.
    • Playwright
    • TypeScript
    • C#
    • .NET
    • JIRA
    • Docker
    • AI Testing
  2. 2022 — 2024
    Eimagine Technology Group
    Senior Software Quality Assurance Engineer, Consultant
    • Built and maintained custom automation frameworks for enterprise CRM platforms, reducing mean test execution time 82% and manual testing cost 40% per cycle.
    • Led QA engineering across three parallel agile teams delivering government CRM systems; owned test strategy for 12+ web and mobile applications.
    • Built the QA engineering function; defined the hiring bar, automation standards, and career ladder; team reached 16 engineers and analysts by departure.
    • Ran requirements gathering, affinity diagramming, and user story definition directly with government stakeholders.
    • C#
    • .NET
    • Playwright
    • Selenium
    • Azure DevOps
    • Jenkins
    • NUnit
  3. 2020 — 2022
    RICS Software
    Quality Assurance Engineer
    • Wrote and deployed cross-platform mobile automation for a greenfield point-of-sale system.
    • Owned test strategy and defect triage from development through UAT and release, reporting to the agile team and VP of Product.
    • .NET MAUI
    • .NET
    • Azure DevOps
    • SQL
    • Mobile
    • Cross-platform
  4. 2019 — 2020
    Answers & Insights Market Research
    Research Analyst
    • Analyzed primary exploratory and causal pharmaceutical industry research through data analysis and computation.
    • Developed and moderated strategic surveys, focus groups, and IDIs to extract the most valuable participant data.
    • Led project management operations under the head project manager, including recruiting, screening, and research.
    • Developed algorithms and models in R and Python to analyze research data.
    • Python
    • R
    • Data Science
    • Market Research
    • SQL

Education

  • 2027
    DePaul University
    Master of Science in Software Engineering
    Development & Architecture
    Chicago, IL
  • 2020
    Indiana University
    Bachelor of Science in Business
    Marketing & Management
    Indianapolis, IN
  • Certifications
    • ISTQB Certified Test Manager (CTA-TM)
    • ISTQB Certified Test Automation Engineer (TAE)
    • ISTQB Agile Tester (CTFL-AT)
    • ISTQB Certified Tester (CTFL)
    • Developing Azure Solutions (AZ-204)
    • Software Development (MTA) (MS 98-361)

Projects

Some work of mine.

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Version Control

A commit log of what I'm learning, building, and breaking - And anything else on my mind.

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Contact

Get in touch

Open to consulting engagements, technical leadership conversations, and connections with engineers who care about quality. Drop a note and I'll get back to you.