Backend Engineer – POS Platforms Integration

On; Deutschland; Vor Ort; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

A leading technology company in Germany is looking for a Backend Engineer to design and scale backend services for POS integrations. The role requires 3+ years of experience with Node.js, TypeScript, and working knowledge of APIs in commerce systems. The ideal candidate will thrive in a collaborative environment and contribute to cloud-native architecture development. Join us to redefine the retail experience and foster an inclusive workplace.

Leistungen

Supportive team-oriented atmosphere

Access to personal self-care programs

Qualifikationen

• 3+ years of backend engineering experience with modern technologies.
• Proven track record integrating APIs across commerce and ERP domains.
• Familiar with headless commerce and microservices architecture.

Aufgaben

• Design, build, and scale backend services for POS integrations.
• Contribute to a cloud-native, event-driven architecture.
• Ensure reliability through an automated testing stack.

Kenntnisse

Node.js

TypeScript

APIs

Kafka

PostgreSQL

AWS

OAuth2

Terraform

Jobbeschreibung

Your Mission

• Backend & Integration Engineering: Design, build, and scale backend services that power POS integrations across ERP, eCom, CRM, inventory, and loyalty platforms. Develop REST and GraphQL APIs that are performant, secure, and easy to consume. Implement real-time and batch data sync, authentication flows (OAuth, SSO), and secure event pipelines.


• Architecture & Resilience: Contribute to the design of a cloud-native, event-driven architecture for global retail operations. Build scalable integration patterns using message queues (Kafka, RabbitMQ) and serverless workflows. Support observability through proactive monitoring, alerting, and performance tuning (e.g., NewRelic).


• Testing & Quality Automation: Ensure reliability through a robust automated testing stack: contract tests, load tests, and test data pipelines. Collaborate with QA and DevOps to streamline CI/CD and improve release confidence. Participate in incident response and post-mortem analysis to continuously harden platform stability.


• Collaboration & Strategy: Partner with frontend, product, and vendor teams to align integration design with platform capabilities. Influence technical decisions during vendor evaluations and rollout phases. Impact roadmap decisions by sharing technical insights and platform implications. Actively contribute to the broader architecture vision for On’s composable commerce technology stack.

Your Story

• 3+ years of backend engineering experience with modern technologies (Node.js, TypeScript, or similar).


• Proven track record integrating APIs across commerce, ERP, OMS, or CRM domains.


• Familiar with headless commerce, microservices, and composable architecture principles.


• Experience with message brokers (Kafka) and asynchronous data processing.


• Solid understanding of databases (e.g., PostgreSQL) and infrastructure-as-code tools (Terraform).


• Skilled in designing, scaling, and monitoring cloud-native services (AWS, GCP, or Azure).


• Familiarity with OAuth2, token-based authentication, and secure service design.


• Strong debugging and telemetry skills: logs, traces, metrics, and real-time alerting.

Meet The Team

At On, we don’t just create tools—we craft experiences that move the world. As part of our Retail Experience team, you’ll help build the future of in-store technology. Your code will connect people with performance, power a seamless omnichannel journey, and support a mission that’s bigger than any one screen: to ignite the human spirit through movement. Ready to help us redefine retail? Lace up. Let’s go.

What We Offer

On is a place that is centered around growth and progress. We offer an environment designed to give people the tools to develop holistically — to stay active, to learn, explore and innovate. Our distinctive approach combines a supportive, team-oriented atmosphere, with access to personal self-care for both physical and mental well-being, so each person is led by purpose. On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.