Lead Backend Engineer

Responsibilities

• Design, build, and scale backend services for POS integrations across ERP, eCom, CRM, inventory, and loyalty platforms
• Develop performant and secure REST and GraphQL APIs
• Implement real-time and batch data sync, authentication flows, and secure event pipelines
• Contribute to cloud-native, event-driven architecture using message queues like Kafka or RabbitMQ
• Support observability through proactive monitoring, alerting, and performance tuning
• Ensure reliability through automated testing including contract and load tests
• Collaborate with frontend, product, and vendor teams to align integration design

Requirements

• 5+ years of backend engineering experience with Node.js, TypeScript, or similar
• Proven track record integrating APIs across commerce, ERP, OMS, or CRM domains
• Familiarity with headless commerce, microservices, and composable architecture
• Experience with message brokers (Kafka) and asynchronous data processing
• Solid understanding of databases like PostgreSQL and IaC tools like Terraform
• Skilled in designing and monitoring cloud-native services (AWS, GCP, or Azure)
• Familiarity with OAuth2 and token-based authentication
• Strong debugging and telemetry skills

About the Company

On is a global brand focused on creating high-performance movement experiences. The Retail Experience team builds the future of in-store technology to power a seamless omnichannel journey.