Senior Backend Engineer - NestJS, GraphQL & Cloud

On; Greater London; On-site; GBP 90,000 - 125,000; Full time

Benefits offered by this job

Equal opportunity employer

Team-oriented environment

Job summary

On is seeking a backend-focused engineer to design, build, and maintain scalable services using a modern tech stack including NestJS, TypeScript, and GraphQL. You will own core components in our Commercial cluster and ensure performance, reliability, and security across web, mobile, and third-party integrations.

Collaboration with frontend teams and product managers is essential to deliver end-to-end features.

Qualifications

• Strong background in backend development and delivering high-quality software.
• Proficiency in Node.js and TypeScript with modern backend frameworks.
• Hands-on experience with NestJS and design/build of GraphQL APIs.

Responsibilities

• Design, develop, and maintain robust backend services using NestJS, TypeScript, and GraphQL.
• Collaborate with frontend, product managers, and stakeholders to deliver end-to-end features.
• Deploy and operate services in cloud-native environments using Docker, Kubernetes, and GCP.

Skills

Node.js

TypeScript

NestJS

GraphQL

PostgreSQL

Tools

Docker

Kubernetes

GCP

MikroORM

Kafka

BullMQ

Pub/Sub

Job description

On is seeking a backend-focused engineer to design, build, and maintain scalable services using a modern tech stack including NestJS, TypeScript, and GraphQL. You will own core components in our Commercial cluster and ensure performance, reliability, and security across web, mobile, and third-party integrations.

Collaboration with frontend teams and product managers is essential to deliver end-to-end features.