Senior Backend Engineer - Commerce & DMS Integrations

International; Lisle (IL); On-site; USD 120,000 - 180,000; Full time

Job summary

International in Lisle, IL is seeking a Senior Software Engineer to join the Commerce & Integrations team. You will own the integration layer between our eCommerce platform and Dealer Management Systems, writing clean API contracts and shaping backend evolution.

This hands‑on role is ~70% code, 30% collaboration, including mentoring junior engineers and aligning with Product Owner and Platform Architect on direction.

Qualifications

• Bachelor's degree and at least 5 years of software engineer experience.
• At least 1 year of lead experience.
• Master's degree and at least 3 years of software engineer experience.
• At least 1 year of lead experience.
• At least 8 years of software engineer experience.
• At least 1 year of lead experience.

Responsibilities

• Write, test, and ship production backend code every sprint - REST API endpoints, business logic, and integration components.
• Design and implement order workflow logic (state machines) that automates order-to-cash flows, returns processing, and core-charge handling.
• Own backend user stories end-to-end: design, implementation, unit and integration tests, PR review, and deployment.
• Diagnose and resolve backend performance issues, API latency spikes, and data consistency problems.
• Build and maintain integrations between our commerce platform and Dealer Management Systems (CDK, Procede, SAP, Karmak).
• Implement product data ingestion pipelines from PIM and fitment data sources into the platform.
• Implement distributed transaction patterns (Saga) to keep data consistent across systems.
• Identify and resolve data mismatches with audit trails.

Skills

Backend development

REST API design

State machines

Distributed systems

Performance tuning

Code reviews

Mentoring

Unit testing

Team collaboration

Education

Bachelor's degree in software engineering or related field

Master's degree in computer science or related field

Tools

Docker

Kubernetes

Azure

Job description

International in Lisle, IL is seeking a Senior Software Engineer to join the Commerce & Integrations team. You will own the integration layer between our eCommerce platform and Dealer Management Systems, writing clean API contracts and shaping backend evolution.

This hands‑on role is ~70% code, 30% collaboration, including mentoring junior engineers and aligning with Product Owner and Platform Architect on direction.