Loyalty & Referrals R&D Trainee - Full-Stack Engineer - Bilingual Mandarin

CWILL•Cary, NC

2h•$80,000 - $110,000•Hybrid

About The Position

CWILL (pronounced 'quill') is a post-purchase and retention suite built for Shopify brands. Reduce support tickets, recover lost revenue from returns, and turn one-time buyers into loyal fans — with tools purpose-built for every touchpoint that follows the sale. CWILL Loyalty & Referrals helps Shopify merchants reward repeat customers with points, VIP tiers and referral programs. Production bug fixes and data support for enterprise customers take up a full engineer's time today. As an R&D Trainee, you'll own much of this work, learning our systems from the inside, while growing into a full-stack engineer.

Requirements

Bachelor's degree or higher in Computer Science, Software Engineering, Information Technology or a related field; Class of 2026 or recent graduate
Strong programming fundamentals: proficient in at least one backend language (Java, Go, Python or Node.js), with a good grasp of common data structures and algorithms
Frontend basics (HTML, CSS, JavaScript) and at least one framework (React or Vue)
Backend fundamentals: HTTP, RESTful API design and MVC; able to build basic APIs on your own
At least one relational database (MySQL or PostgreSQL): able to write SQL and understand indexes and transactions
Comfortable using Git for version control and team collaboration
Good coding habits, with attention to readability and maintainability
Strong learner who picks up new technologies quickly and solves problems by reading documentation
Clear logical thinking: able to break down problems and explain technical choices
Good communication and ownership; you share progress proactively and stay calm under pressure
Professional working proficiency in Mandarin Chinese and English (you will work daily with our engineering team in China)

Nice To Haves

A complete full-stack project you can show (coursework, competition, open source or internship)
Internship experience on a software team
Familiarity with TypeScript, Docker, CI/CD or cloud services (AWS, GCP, Alibaba Cloud, etc.)
An active GitHub history or technical blog
Programming competition awards (e.g., ICPC)
Hands-on experience with AI coding tools such as Cursor, Codex or Claude Code

Responsibilities

Investigate and resolve technical issues from user and support tickets, quickly finding the root cause across frontend and backend (data errors, API errors, display problems and more)
Classify issues by type and severity, respond quickly to urgent ones and drive fixes to completion
Document frequent issues as troubleshooting guides and FAQs to reduce repeat tickets
Work with support and product to reproduce problems, and provide data corrections or workarounds when needed
Prioritize production issues from enterprise customers, track progress and keep stakeholders updated
Build feature improvements and experience upgrades requested by product and operations, from frontend and backend development through testing and release
Improve performance, refactor code and reduce technical debt to make the system more stable and responsive
Improve frontend interactions and page load speed, and optimize backend API performance and database queries
Join requirement reviews and give input on technical feasibility