Remote Backend Engineer: Payments & APIs (Internship)

Cornerstone; United States; Remote; USD 28,000 - 50,000; Part time

Benefits offered by this job

Mentorship

Letter of recommendation

Remote internship

Job summary

Cornerstone is seeking an internship or early-career backend engineer in the United States to help build and maintain APIs and services powering digital payments and related financial features.

You will collaborate with frontend and product teams, focusing on performance, security, and scalable design, with hands-on engineering tasks that reach live users. Mentorship and practical experience are provided, with potential for a full-time opportunity based on performance.

Qualifications

• At least one year of backend development experience.
• Proficiency in Node.js, Python, Go, or a comparable language.
• Understanding of API design and SQL or NoSQL databases.
• Care for code quality, performance, and scalability.
• Experience with a cloud platform such as AWS or GCP, or a similar service.
• Willingness to learn in a startup environment.

Responsibilities

• Build and maintain backend APIs and services.
• Work with frontend and product colleagues to deliver features.
• Consider performance, security, and scalability in implementation.
• Write code that is maintainable and can be tested.
• Join discussions about system architecture, design, and deployment.
• Investigate defects and improve engineering tools and workflows.

Skills

Node.js

Python

Go

API design

SQL

NoSQL

Cloud (AWS/GCP)

Testing

Code quality

Tools

Docker

Kubernetes

CI/CD

DevOps tools

Job description

Cornerstone is seeking an internship or early-career backend engineer in the United States to help build and maintain APIs and services powering digital payments and related financial features.

You will collaborate with frontend and product teams, focusing on performance, security, and scalable design, with hands-on engineering tasks that reach live users. Mentorship and practical experience are provided, with potential for a full-time opportunity based on performance.