MingYi Lin
Profile
I’m a Full-Stack Engineer based in London with 8+ years of experience building web apps using Ruby on Rails, React, Node.js, and GraphQL. I enjoy turning real-world problems into elegant software solutions. I care about writing reliable, maintainable code and collaborating closely with teammates to build products that make a real difference in people’s everyday lives.
Work Experience
Oct 2019 - present
I am currently employed at HeadBox, an event tech startup with a product-first mentality and a fast-paced weekly cycle aimed at transforming the industry
My day-to-day tech stack includes Node.js, Ruby on Rails, TypeScript, React, GraphQL, and PostgreSQL.
- Rebuilt the internal admin platform with my team, leveraging learnings from its previous version. The improved system enables the whole company to manage venue bookings more efficiently.
- Co-designed and implemented a sustainability feature that empowers customers to make more environmentally responsible choices when booking venues.
- Integrated third-party services including Contentful, HubSpot, and Auth0 to accelerate product delivery and quickly validate business requirements—minimizing development overhead on unproven ideas.
- Supported the company’s international expansion into Australia and the US by implementing localization (i18n) and multi-currency support.
- As the main Ruby developer, I regularly supported teammates working in Ruby, while also growing my expertise in Node.js with close cross-functional collaboration.
Feb 2018 - Jun 2019
I worked at SyncACE, a fintech startup focused on revolutionizing the lending industry through digital loan servicing, KYC, and credit scoring solutions. As a Full-Stack Developer, I was responsible for the architecture, development, and delivery of both the company’s core service, Alphaloan, and its internal CRM platform.
The tech stack included Ruby on Rails, Python, TypeScript, AngularJS, and PostgreSQL.
- Improved the user onboarding and landing flow, resulting in a 30% increase in conversion rates.
- Built an automated marketing feature integrated with the CRM system, reducing operational time costs by 70% and improving campaign efficiency.
- Led the adoption of behavior-driven (BDD) and test-driven development (TDD) practices to improve code reliability and maintainability across all applications.
- Designed and implemented backend APIs for partner banks, enabling secure and scalable third-party integrations using Ruby on Rails.
Rails Developer / KUMA Inc
Oct 2015 - Sep 2017
I joined KumaWash as the second engineer, helping to lay the technical foundation for Taiwan’s first on-demand laundry and dry cleaning platform. The service aimed to replace traditional laundromats by offering a fast, reliable, and user-friendly pick-up and delivery experience for customers at home or at the office.
- Built the entire platform from the ground up using Ruby on Rails, ensuring a scalable and maintainable backend architecture.
- Introduced React into the frontend stack following careful evaluation, enabling more dynamic and responsive user experiences.
- Defined user story templates and processes that improved collaboration across engineering, product, and operations teams.
- Mentored junior developers through architecture reviews and hands-on guidance, particularly during key refactoring initiatives.
Oct 2013 - Mar 2015
National Taiwan Ocean University Geographic Information System Research Center is top 3 GIS research centers in Taiwan. We focus on the research of GIS, RS, and GPS applications to aid in disaster prevention engineering planning, disaster early warning and forecasting techniques, shipping management, and nautical charting.
- Build several internal web systems and dashboards for GIS with Ruby on Rails.
- Developed QGIS plugins with C++ and Qt.
- Coach of Community Workshop: Rails Girls Taipei 6th, Rails Girls Yilan 1st..
- Member of Rails Rookie Study Group in Taipei, continue learning together since Apr. 2015.
- Document and article translator on Ruby-lang and React website.
Education
Sep. 2008 - Jun 2012, Keelung Taiwan
Award
Feb 2015
Won 2nd place at the ALPHA Hackathon by creating 菜色 DishColor, a rewards website that helps people to decide what color they want/cook tonight. Build with Ruby on Rails, Html, Javascript, CSS
Languages
- Mandarin - Native
- English - Professional working proficiency