R&D Trainee: Full-Stack Backend Engineer (SaaS)

CWILL; New Jersey; On-site; USD 60,000 - 80,000; Full time

Benefits offered by this job

401(k)

PTO

Paid Holidays

Insurance

Job summary

CWILL, a post‑purchase and retention SaaS for Shopify brands, is launching an R&D Management Trainee program in New Jersey. You’ll join a product engineering team, work on production systems from day one with mentorship from senior engineers, and grow into an engineer who can independently own modules and make technical decisions.

Placed on an active product team—Order Tracking, Loyalty & Referrals, Pop-up & Email Marketing, AI Chat, SEO & Speed—you’ll contribute to feature development, system

Qualifications

• Recent US university graduate (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.

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.
• Follow team engineering standards: code reviews, documentation, and testing; communicate progress and risks.

Skills

Backend languages

Web fundamentals

Debugging

Communication

Problem solving

Education

BS or MS

Tools

React

Node.js

Next.js

NestJS

PostgreSQL

Redis

Docker

CI/CD

AWS

Job description

CWILL, a post‑purchase and retention SaaS for Shopify brands, is launching an R&D Management Trainee program in New Jersey. You’ll join a product engineering team, work on production systems from day one with mentorship from senior engineers, and grow into an engineer who can independently own modules and make technical decisions.

Placed on an active product team—Order Tracking, Loyalty & Referrals, Pop-up & Email Marketing, AI Chat, SEO & Speed—you’ll contribute to feature development, system