R&D Management Trainee - Full-Stack Engineer (Backend）

CWILL

13d•$60,000 - $80,000

About The Position

CWILL is a post-purchase and retention suite built for Shopify brands, offering tools to reduce support tickets, recover revenue from returns, and foster customer loyalty. The engineering teams are developing next-generation SaaS products, including AI-powered customer service tools and SEO optimization products. This role is part of the R&D Management Trainee program, designed for recent graduates or those with 1-2 years of experience. Trainees will be embedded in a product engineering team, working on production systems with mentorship from senior engineers, with the goal of growing into engineers who can independently own modules and make technical decisions. The role involves working on various product teams such as Order Tracking, Loyalty & Referrals, Pop-up & Email Marketing, AI Chat, and SEO & Speed.

Requirements

Recent graduate from a US university (BS or MS), or within 1–2 years of graduation
Proficiency in at least one backend language: JavaScript/TypeScript, Python, Java, Go, or PHP
Web fundamentals: HTTP, RESTful API design, frontend-backend interaction, and relational databases
Basic SQL and database understanding (MySQL or PostgreSQL)
Able to read documentation, debug systematically, and own your work through completion
Reliable and communicative — you surface problems early and follow through on commitments

Nice To Haves

Experience with any of: React, Node.js, Next.js, NestJS, Python, PostgreSQL, Redis
AI/LLM project experience: prompt engineering, RAG, knowledge bases, chatbots, or content generation
Shopify app development, independent store tech, SEO tools, or SaaS product experience
Internship at a tech or SaaS company; open source contributions or personal project portfolio
Familiarity with Docker, CI/CD, or cloud services (AWS, Aliyun, etc.)
Active GitHub profile with consistent commit history
Competitive programming background (ACM, LanQiao Cup, etc.)
Experience with AI-assisted development tools (Cursor, GitHub Copilot, Claude Code, etc.)
Mandarin Chinese communication ability

Responsibilities

Build features across the full stack with a backend focus: APIs, business logic, data processing, and third-party integrations
Participate in technical solution design, coding, integration testing, and deployment
Take ownership of the quality of the features you build and deliver them to spec
Assist with production bug investigation, root cause analysis, and resolution
Use logging, monitoring, and database tools to trace issues methodically
Contribute to ongoing improvements in system stability, performance, and code maintainability
Follow team engineering standards: code reviews, documentation, and testing
Proactively communicate progress, risks, and blockers
Participate in post-launch retrospectives; continuously improve your code quality and engineering judgment
As you grow, take on increasing ownership of modules and technical decisions