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About the Role

As a Lead Backend Software Engineer at On, you will drive the integration of our POS platform with mission-critical systems like ERP, OMS, CRM, and loyalty engines. You will architect and build resilient services, shape event-driven data flows, and ensure store operations are fast, reliable, and future-proof. This role is part of the Retail Experience team, focusing on the intersection of technology and shop floor operations.

Responsibilities

Design, build, and scale backend services powering POS integrations across ERP, eCom, CRM, inventory, and loyalty platforms.
Develop performant, secure, and easy-to-consume REST and GraphQL APIs.
Implement real-time and batch data synchronization, authentication flows (OAuth, SSO), and secure event pipelines.
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.
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.
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.
Contribute to the broader architecture vision for On’s composable commerce technology stack.

Requirements

5+ 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.
Familiarity 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.

Skills

Node.js
TypeScript
REST APIs
GraphQL APIs
API Integration
ERP Integration
OMS Integration
CRM Integration
Headless Commerce
Microservices
Composable Architecture
Kafka
RabbitMQ
Asynchronous Data Processing
PostgreSQL
Terraform
AWS
GCP
Azure
OAuth2
SSO
Cloud-Native Services
Monitoring
Alerting
Performance Tuning
Automated Testing
CI/CD
Incident Response
Debugging
Telemetry

Experience Level

5+ years of backend engineering experience

Benefits

Dynamic, fast-paced, and collaborative environment
Opportunities for professional growth and development

About the Company

At On, we don’t just create tools—we craft experiences that move the world.
Our mission is to ignite the human spirit through movement.
We are a team of explorers, dreamers, and innovators.
We offer a dynamic, fast-paced, and collaborative environment where you can make a real impact.
You'll be surrounded by passionate and talented colleagues, with plenty of opportunities for professional growth and development.

Equal Opportunity

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.