# Sarah R. > Founding Engineer at Layer Location: San Francisco, California, United States Profile: https://flows.cv/sarahr πŸ‘‹ Hi, I'm Sarah! I'm currently a software engineer at Layer, and have previously worked at Slack, Meta and Cisco. I'm passionate about building tech products that have the potential to generate social impact. ## Work Experience ### Founding Engineer @ Layer Jan 2025 – Present | San Francisco, California, United States ### Senior Software Engineer @ Slack Jan 2021 – Jan 2025 | San Francisco, California, United States Making frontend infrastructure at Slack simpler, more scalable, and more performant. ### Software Engineering Intern @ Meta Jan 2020 – Jan 2020 | Menlo Park, California, United States I built a tool to translate labor market insights into executable queries against Meta’s talent database. This feature helps thousands of Meta recruiters source top candidates from >10 million resumes. ### Software Engineering Intern @ Slack Jan 2019 – Jan 2019 | San Francisco, California, United States I drove the conception, development, and initial release of the context bar, a customer delight feature that indicates to users when they are in a Slack Connect (externally shared) channel. ### CIS160 Teaching Assistant (Discrete Math) @ University of Pennsylvania Jan 2018 – Jan 2018 | Philadelphia, PA I led recitations of 20+ students, held office hours, and graded exams as a teaching assistant for discrete math. I taught topics including set theory, combinatorics, probability, and graph theory. ### Software Engineering Intern @ Cisco Jan 2018 – Jan 2018 | San Jose, CA I designed and implemented privacy management controls for Cisco OneID, an identity and access management (IAM) system that holds 20+ million user identities across 150 cloud-based offers. ## Education ### Bachelor of Engineering - BE in Computer Science University of Pennsylvania ### Bachelor of Science - BS in Economics The Wharton School ### High School Wayland High School ## Contact & Social - LinkedIn: https://linkedin.com/in/sarahwraines --- Source: https://flows.cv/sarahr JSON Resume: https://flows.cv/sarahr/resume.json Last updated: 2026-04-05