Senior Specialist - Software Engineer III

About the role

As a Backend Engineer in our Commercial cluster, you will be at the heart of On's digital ecosystem. You will design, build, and scale the critical services that power our global e‑commerce platform, B2B partner portals, and retail experiences.

Key responsibilities

• Design, develop, and maintain robust and scalable backend services using NestJS, TypeScript, and GraphQL.
• Take ownership of key components within the Commercial cluster, ensuring performance, reliability, and client‑application compatibility.
• Collaborate closely with frontend engineers, product managers, and other stakeholders to deliver end‑to‑end features.
• Write clean, maintainable, well‑tested code and participate in code reviews and pair programming.
• Deploy and operate services in a cloud‑native environment on Google Cloud Platform using Kubernetes and Docker.
• Contribute to building resilient distributed systems that can handle growing scale.

Required profile

• A strong background in backend development with proven experience shipping high‑quality software.
• Proficiency in Node.js and TypeScript; hands‑on experience with NestJS is a significant advantage.
• Solid experience designing, building, and consuming GraphQL APIs.
• Strong knowledge of relational databases such as PostgreSQL and data modeling.
• Hands‑on experience with cloud platforms (GCP preferred) and containerization technologies (Docker, Kubernetes).
• Collaborative team player with excellent communication skills, comfortable in an agile environment.

Required skills

• NestJS
• TypeScript
• Node.js
• GraphQL
• PostgreSQL
• Google Cloud Platform (GCP)
• Docker
• Kubernetes
• MikroORM (ORM tool)
• Kafka, BullMQ, Pub/Sub (event‑driven systems)