Summary
Overview
Work History
Education
Skills
Timeline
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Vincent Liu

Vincent Liu

Senior Fullstack Engineer

Summary

Senior Software Engineer with 8+ years of experience building large-scale SaaS and AdTech products across frontend and backend systems.

Experienced in React, TypeScript, Node.js, and Ruby on Rails, with a strong track record of leading architectural initiatives, driving large-scale codebase modernization, and delivering high-impact product features for global customers.

Passionate about building scalable user experiences, developer platforms, and AI-powered applications through close collaboration with product, design, and engineering teams.

Overview

11
11
years of professional experience

Work History

Senior Fullstack Engineer

Placements.io
06.2021 - Current
  • TypeScript Migration Leadership: Led the migration of a 300k+ line legacy JavaScript codebase to TypeScript, establishing engineering standards, conducting internal workshops, and driving adoption across teams. Successfully increased TypeScript coverage to over 50%, improving maintainability, type safety, and overall code quality across the platform.
  • Frontend Architecture & Scalability: Architected and delivered a large-scale refactor of a mission-critical nested table system, transforming a feature-heavy legacy implementation into a scalable recursive architecture. Implemented complex multi-level drag-and-drop interactions for hierarchical datasets while maintaining excellent rendering performance and responsiveness.
  • AI Product Development: Led frontend development of an AI-powered chatbot experience using React and streaming APIs, collaborating closely with product and design teams to create a highly responsive and intuitive conversational interface.
  • Global Platform Integrations: Designed and maintained core integrations with TikTok, LinkedIn, and DocuSign, building scalable OAuth workflows and synchronization pipelines using Ruby on Rails and Node.js to enhance enterprise-scale customer operations.
  • Engineering Productivity: Enhanced developer productivity and long-term maintainability via modular architecture initiatives, testing improvements, and cross-functional collaboration within a distributed US-based engineering organization.

Software Engineer

Ucfunnel
02.2015 - 07.2020
  • High-Scale Reporting Platform: Designed and developed large-scale reporting platform that processed and distributed advertising performance data for thousands of global users, enhancing data accessibility.
  • Data Visualization & Analytics: Built analytics dashboards using Elasticsearch and Kibana to visualize millions of advertising events and bidding records, enabling data-driven decision making for advertisers and publishers.
  • Recommendation System: Integrated PredictionIO-based recommendation services to deliver personalized content recommendations based on user engagement and behavioral data.
  • Creative Ad Tech: Developed high-impact Richmedia ad templates (e.g., 3D Marquee) using vanilla JavaScript, improving loading speed and visual performance for user engagement.

Education

M.S. Program (Coursework Completed / Incomplete) - Graduate Institute of Networking And Multimedia

National Taiwan University
Taipei
04.2001 -

BBA - Department of Information Management

National Taiwan University
Taipei
04.2001 -

Skills

Frontend: React, TypeScript, JavaScript (ES6), Nextjs, Redux

Backend: Nodejs, Express, Ruby on Rails, Python (Flask)

Databases: MySQL, MongoDB, Elasticsearch, Redis

Cloud & DevOps: AWS (EC2, S3), Docker, CI/CD, Git

Engineering Practices: System Design, Frontend Architecture, API Design, Testing, Code Review, Technical Leadership

Timeline

Senior Fullstack Engineer

Placements.io
06.2021 - Current

Software Engineer

Ucfunnel
02.2015 - 07.2020

M.S. Program (Coursework Completed / Incomplete) - Graduate Institute of Networking And Multimedia

National Taiwan University
04.2001 -

BBA - Department of Information Management

National Taiwan University
04.2001 -
Vincent LiuSenior Fullstack Engineer