# Karen Sin

> Software Engineer at Productiv

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/karensin

https://karensin.github.io/portfolio

I'm a Frontend Developer based in San Francisco, California. I am passionate about creating simple, intuitive experiences that solve real user problems. I enjoy collaborating with cross-functional teams to bring thoughtful, user-centered designs to life, and take pride in writing clean, maintainable code. I'm especially motivated by work that enhances usability and delivers intuitive, user-friendly solutions—helping users accomplish tasks more efficiently while reducing friction and confusion. I'm always looking for opportunities to grow, contribute meaningfully, and build products that make a real impact.

## Work Experience
### Software Engineer II @ Productiv
Jan 2023 – Present | Palo Alto, California, United States
Drive development of core frontend features using Vue 3 and Vuex, including third-party notification integration, inbox functionality, a dynamic workflow builder, and customizable branding — improving user engagement and system performance.
Lead frontend development and serve as domain expert for the Productiv App Center, driving daily standups and sprint planning to enhance team alignment and execution.
Collaborate cross-functionally with design and product teams to define project goals, scope technical requirements, and align on timelines — enabling smooth implementation, improving customer satisfaction, and driving new revenue opportunities.
Own end-to-end release process, driving successful weekly customer deployments by proactively identifying, triaging, and resolving blockers — ensuring on-time releases and strengthening customer trust.

### Software Engineer @ Productiv
Jan 2021 – Jan 2023 | Palo Alto, California, United States

### Frontend Engineer @ 777 Partners
Jan 2020 – Jan 2021
Lead frontend project developer on building the rebranded Flair airlines website and mobile apps with improved user experience and additional enhancement features.
Implemented features with SDK (Software Development Kit) that can be used across 777 partners portfolio airlines to support and provide a unified infrastructure for better management, reusability, optimized application for performance and scalability.
Managed our CMS (content management system) that allows clients to update flight route information, news and other information in real time.
Redesigned and implemented member service and inflight entertainment features for the mobile app using React Native and Mobx . New features such as international travel flights and member services are estimated to increase 30% in revenue and user usage. 
Designed and implemented various front-end user interfaces and developed ideas, products, or features using React, Redux, Typescript to follow new developments and trends.
Collaborated with team members to establish objectives and design more functional, cohesive code to enhance the user experience.
Developed ideas for new programs, products, or features by monitoring industry developments and trends.
Analyzed and refactored existing source code for proprietary in-house systems
Ensured technical feasibility of UI/UX designs with designers and project managers 
Compiled and analyzed data, processes, and code to troubleshoot problems and identify areas for improvement.

### GIS Data Analyst @ Apple
Jan 2018 – Jan 2019
Enhanced data accuracy on Apple Maps by leading the data aggregation across multiple US map data sources: satellite imagery, apple street view photos, and user location data.
• implement new map features to identify potential map inaccuracies
• Road quality detection
• Street sign changes
• Road closures and alterations
• Built analytics dashboards with PostgreSQL , ArcGIS , and QGIS to report on traffic and road
alterations via large datasets
• Worked closely with designers on new map features which included planning out workflows on the delivery of the features to maximize discoverability, interface behaviors, and how information is being navigated and displayed.

### Staff Research Associate II @ UCSF Department of Psychiatry
Jan 2017 – Jan 2018 | UCSF mission bay
•Research on the correlation between high quantities of Cortical Inhibitory Neurons and High Rates of Autism Spectrum Disorder (ASD).

### Lab Technician III @ UCSF Department of Psychiatry
Jan 2017 – Jan 2017 | san francisco, ca
Laboratory Assistant III
• Document and analyze data from experiments to validate lab hypotheses
• Supervise and mentor various lab assistants trainees

### Dairy Animal Research intern @ UC Davis
Jan 2015 – Jan 2015 | University of California,Davis
• Assisted in the study of cattle behavior and biological changes with different techniques of cooling cattle, tasks include cleaning, feeding, handling, preparing and observing cattle behavior.


## Education
### Bachelor of Applied Science (B.A.Sc.) in Small/Companion Animal Surgery and Medicine
University of California, Davis
Jan 2012 – Jan 2016

### Computer Software Engineering
Bloc


## Contact & Social
- LinkedIn: https://linkedin.com/in/karensin94

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Source: https://flows.cv/karensin
JSON Resume: https://flows.cv/karensin/resume.json
Last updated: 2026-03-20