# Samuel O'Brien

> Front End Engineer

Location: Philadelphia, Pennsylvania, United States
Profile: https://flows.cv/samuelobrien

I'm a Front End Engineer with 8 years of experience building fast, accessible, and user-friendly interfaces for both startups and enterprise teams. My expertise lies in crafting performant React and TypeScript applications with a strong focus on usability, scalability, and accessibility best practices.

I thrive in collaborative environments where thoughtful design, clean architecture, and inclusive user experiences are prioritized. Passionate about scaling design systems, optimizing rendering performance, and ensuring WCAG compliance.

## Work Experience
### Software Engineer @ 🔭 Galileo
Jan 2022 – Jan 2025 | San Francisco, California, United States
Led front-end development for a suite of AI/ML evaluation tool spanning generative AI, computer vision, and object detection. Scaled a React-based scatter plot embeddings app to render 500K+ data points at 60 FPS using web workers and generator-based batching. Built a prompt engineering interface enabling streamlined dataset input and LLM execution, with real-time rendering of 25+ key metrics through asynchronous polling and interactive visualizations. Collaborated closely with design and backend teams to build performant, user-friendly UIs that support deep data analysis and insight generation.

### Software Engineer @ S&P Global Market Intelligence
Jan 2019 – Jan 2022 | Boulder, Colorado, United States
Led development of a high-performance TypeScript/React charting application used by 7K+ users weekly, while mentoring junior engineers. Founded and led an internal Accessibility Guild to promote inclusive practices company-wide. Delivered major performance wins by optimizing Webpack, cutting build times by 50% and reducing asset size across 21 apps. Accelerated feature delivery by contributing reusable, tested components across multiple stacks including C#/.NET, React, and Vue.

### Web Developer @ Drexel University
Jan 2017 – Jan 2019 | Philadelphia, Pennsylvania
Redesigned and implemented a reusable marketing landing page template used across 24 campaigns, integrating Google Analytics and ensuring WCAG-compliant accessibility. Reduced onboarding friction by building an internal documentation site with React and Gatsby, improving knowledge sharing and team productivity.

### Media Arts & Design Teacher @ First Philadelphia Charter High School
Jan 2016 – Jan 2017 | Philadelphia, Pennsylvania
Developed a digital arts and technology curriculum for students in grades 9-12


## Education
### Bachelor of Science - BS in Art Teacher Education
Temple University
Jan 2011 – Jan 2015


## Contact & Social
- LinkedIn: https://linkedin.com/in/samuelobrien25

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Source: https://flows.cv/samuelobrien
JSON Resume: https://flows.cv/samuelobrien/resume.json
Last updated: 2026-03-29