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MMD Services

Principal Engineer (Backend)

MMD Services, Addison, Illinois, United States, 60114

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Base pay range $70.00/hr - $90.00/hr

Our client is seeking a Principal Backend Engineer to help lead the transformation of a monolithic SAP Hybris system into a modern, cloud-native, and personalized commerce experience. This role blends deep backend engineering knowledge with architectural thinking, ERP integrations, and a strong product mindset.

SAP Hybris Experience is not required for this role

You will play a key part in reimagining how backend services are exposed and extended via APIs, enabling dynamic personalization and performance tuning. Working closely with cross-functional leaders, this role will influence platform design, vendor evaluations, and the long-term roadmap for a scalable, user-tailored commerce system.

Key Responsibilities

Architect scalable backend services to decouple SAP Hybris and Commerce Cloud components from monolithic patterns.

Lead decision-making around commercial off-the-shelf (COTS) solutions vs. custom build options (e.g., evaluating tools like Bloomreach for experience layer integrations).

Define patterns and standards that enable AI-driven personalization capabilities atop an API-first commerce architecture.

Service Design & Implementation

Contribute to and review services built using Java, Node.js, or TypeScript, focusing on clean architecture and cloud-native patterns.

Support the shift to containerized services orchestrated via Kubernetes.

ERP & System Integrations

Design and implement integrations with SAP S/4HANA and other ERP systems for seamless backend commerce data flow.

Ensure integration layers follow resilient, scalable design using asynchronous patterns where appropriate.

Embed operational excellence through ITSM-aligned development (e.g., bite‑size, traceable, and auditable changes).

Promote observability, deployment hygiene, and maintainability of backend services.

Core Requirements

10+ years of backend engineering experience, with strong emphasis on

eCommerce systems .

Deep expertise in

Java

and/or

Node.js , along with

TypeScript

in backend contexts.

Solid understanding of

API gateway architecture ,

containerization , and

Kubernetes .

Ability to design and guide systems in cloud environments, with a

cloud-native mindset .

Strong knowledge of

search engines

(e.g., Solr, OpenSearch) and experience fine‑tuning relevancy models.

Familiarity with

personalization technologies , AI-driven recommendations, and user segmentation strategies.

Comfortable working with COTS vendors or building platform components in house from scratch.

Seniority level: Mid-Senior level

Employment type: Full‑time

Job function: Engineering and Information Technology; Industries: Retail and Transportation, Logistics, Supply Chain and Storage

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