Ming-Yi Lin 林明毅

• Full-stack product engineering: Ruby on Rails, TypeScript, React, Node.js, GraphQL, PostgreSQL.
• Platform and infrastructure: AWS, Kubernetes, CI/CD, service migration and production operations.
• Integrations and automation: government APIs, banking APIs, CRM platforms and SaaS integrations.
• Engineering leadership: mentoring, architecture reviews, delivery process improvement and cross-functional collaboration.

Software Engineer at Online Filings Ltd

• Maintained internal filing platform using Node.js, TypeScript, React, PostgreSQL and AWS ECS.
• Automated government filing integrations with HMRC and Companies House, reducing manual handling in business-critical processes.
• Improved refund operations, reducing manual processing effort by more than 50%.

Full Stack Engineer at HeadBox Ltd

Product-focused event technology company building venue booking and event planning tools across three countries, with around 10,000 venues and 60,000 users.

• Decomposed a legacy Ruby on Rails platform by extracting host and customer-facing services while keeping existing users operational.
• Designed and shipped frontend and backend services across React, Node.js, Ruby on Rails, GraphQL and PostgreSQL.
• Built and maintained AWS infrastructure, including EKS, Lambda and S3, with automated CI/CD pipelines.
• Shipped AI-assisted content generation and Matterport virtual tour integrations to help hosts create richer venue content.
• Rebuilt admin tooling and reporting for customer support and operations teams.
• Integrated Contentful, HubSpot and Auth0 to reduce custom development overhead and support product experimentation.
• Added localisation and market-specific product flows for Australia and the US.
• Co-designed and implemented sustainability-focused features, helping customers make more environmentally responsible venue booking decisions.
• Mentored one engineer within an engineering team of around 15 people.

Full Stack Engineer at SyncACE Inc.

Fintech startup building digital loan servicing, KYC and credit scoring products.

• Built and maintained AlphaLoan, a digital lending and credit scoring platform.
• Integrated machine-learning credit scoring models into Ruby on Rails workflows.
• Analysed user data with data scientists to improve high-risk user detection and internal risk review workflows.
• Improved onboarding flow, contributing to a 30% increase in conversion rates.
• Built CRM-integrated marketing automation, reducing operational time by 70%.
• Designed secure APIs for partner bank integrations and regulated third-party workflows.

Ruby on Rails Developer at KumaWash

Early engineer for KumaWash, Taiwan's first on-demand laundry and dry cleaning platform.

• Built the platform from the ground up with Ruby on Rails and helped establish the technical foundation for product growth.
• Introduced React for more dynamic and responsive customer-facing workflows.
• Defined user story templates and delivery processes across engineering, product and operations.
• Mentored one junior developer through architecture reviews and hands-on support within a team of around 10 people.

Software Engineer at NTOU GIS Research Center

• Built internal GIS web systems and dashboards with Ruby on Rails.
• Developed QGIS plugins using C++, Qt and Python.
• Built Urban Flood Warning System with Ruby on Rails and PostgreSQL.
• Contributed to GIS, remote sensing and GPS research for disaster prevention and marine navigation.

Open source contributions focused on Ruby on Rails, React and AI-related projects. See GitHub.

Coached Rails Girls workshops in Taipei and Yilan, led StayRails workshops, and wrote For Rails Beginners.

Bachelor of Computer Science at National Taiwan Ocean University

Final-year project: built an OpenCV-based binocular stereo vision object detection system using calibrated dual cameras to detect moving objects and estimate distance.