# Allen Yu

> Software Engineer at AWS

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

I'm an experienced full-stack developer with a passion for building responsive front-end features using React and designing robust back-end REST APIs. I thrive on challenges of all types—they're what drive my continuous growth and keep me motivated in this ever-evolving field. My goal is to develop scalable solutions and create fluid, intuitive user interfaces that deliver exceptional experiences for customers and users.

I excel both independently and as a collaborative team member in agile environments, working seamlessly with cross-functional teams to drive projects forward. I bring comprehensive experience across the entire development lifecycle: from requirements gathering and system design through implementation, testing, code review, deployment, and ongoing support. Whether I'm architecting backend services, crafting engaging user experiences, or mentoring team members, I'm committed to delivering high-quality solutions that make a real impact.

Front-End: JavaScript, TypeScript, React, Redux, Jest, Webpack, HTML/CSS (SASS), CSS Modules, Accessibility, Apollo, Storybook, Performance
Back-End: Ruby/Rails, Python, Django, SQL, Nginx, Redis, GraphQL (GQL), GenAI (Anthropic - Prompt engineering - LLM)
Development Tools: Git, CI/CD, Docker, AWS

## Work Experience
### Software Engineer @ Amazon Web Services (AWS)
Jan 2022 – Present

### Software Engineer @ Nextdoor
Jan 2021 – Jan 2022
• Designed and built out the key infrastructure for Server Driven UI
• Architected and managed a team to deliver dark mode across all frontend product areas
• Led the frontend navigation initiative to greatly improve the user experience on Nextdoor
• Mentored interns and junior engineers
• Led the development of a better front-end web and mobile web experience for all of our Neighbors!

### Software Engineer @ HackerRank
Jan 2020 – Jan 2021
• Owned and spearheaded the implementation of scalable front-end web features (React, Redux, Jest, SASS/SCSS) and back-end REST API endpoints (Ruby/Rails, MySQL, Redis)
• Integrated Just-In-Time (JIT) Provisioning to reduce sign-up friction and increase the sign-up rate by 25%.
• Collaborated with multiple stakeholders to lead the implementation of a new self-serve payment option and delivered the feature ahead of schedule

### Front-End Engineer @ HackerRank
Jan 2019 – Jan 2020
• Led the implementation of Google Tag Manager to help collect and measure key business metrics; allowing the company to become more data-driven
• Increased developer productivity by integrating a feature flag system for rolling-out and rolling-back new features gracefully on production
• Designed and implemented SCIM provisioning using server-less architecture; increasing user provisioning by 10% for customers using Okta

### Software Engineer @ RSConsults (Formerly Pecabu, Inc.)
Jan 2018 – Jan 2018 | San Mateo, CA
• Owned, prioritized, and self-managed full stack projects for multiple clients to improve their internal business operation efficiency, lead capture rate, and sales number
• Re-designed a client’s eCommerce webpage from the ground up and integrated various payment options to increase sales by 15-20%.

### Software Engineer @ Pecabu, Inc.
Jan 2013 – Jan 2018
Developed a smart out-of-home advertising system which analyzes large sets of geospatial data to determine the most relevant advertisement (video or image) to display at any given time.


## Education
### B.S in Computer Science
University of California, Riverside


## Contact & Social
- LinkedIn: https://linkedin.com/in/ayu11

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Source: https://flows.cv/allenyu
JSON Resume: https://flows.cv/allenyu/resume.json
Last updated: 2026-03-30