Ryan O'Brien — Software Engineer

ryan.obrien@email.com · (555) 123-4567 · Menlo Park, United States
linkedin.com/in/ryanobrien

Full-stack engineer with 5+ years building consumer applications used by hundreds of millions. Expert in React, PHP/Hack, and large-scale data systems. Passionate about growth engineering and user-facing features.

Experience

Software Engineer — Meta · 2021-07 – Present

• Led development of Instagram Stories sharing feature, growing daily active users by 12% through viral sharing loops and optimized onboarding flow.
• Built real-time notification delivery system processing 1B+ events daily using Apache Thrift and TAO, reducing delivery latency by 40%.
• Designed and analyzed 200+ A/B experiments per quarter, driving data-informed product decisions that improved retention by 8%.

Software Engineer — Twitter · 2019-01 – 2021-06

• Developed the content moderation dashboard used by 10K+ reviewers, reducing false positive rate by 35% through ML-assisted flagging.
• Migrated legacy PHP monolith to GraphQL microservices, improving API response times by 60% and enabling faster feature development.

Education

B.S. in Computer Science — University of Illinois Urbana-Champaign · 2015-09 – 2019-06, GPA: 3.6

Skills

Core Skills: Strategic Thinking, Analytical Problem Solving, Cross-functional Collaboration, Communication Technical: Data Analysis, Project Management, Presentation

Certifications

• Meta Hackathon Winner 2023 (2023)

Open Source

• Core contributor to React (merged 15+ PRs on Fiber architecture)

Mentoring

• Volunteer mentor at CodePath.org, teaching data structures to underrepresented CS students

Certifications

• Meta Certified React Developer