Senior Backend Engineer – Go/Node, Pub/Sub, Remote

Client Server; Greater London; Hybrid; GBP 40,000 - 70,000; Full time

Benefits offered by this job

EMI share options

28 days annual leave

Enhanced maternity/paternity leave

Personal learning budget

Home-station setup

BUPA health insurance

Job summary

Client Server is seeking an experienced backend-focused engineer to join a real-time messaging platform powering developers and businesses. You will work with Go, Node.js, and modern server-side technologies in a flexible, remote-friendly setup with a North London office for occasional collaboration.

The role emphasizes building scalable distributed systems, optimizing performance, and contributing to AI-enabled development workflows, while maintaining ownership of architecture and code quality.

Qualifications

• Backend development with Go or Node.js.
• Experience building or operating distributed systems and messaging.
• Understanding of scalability, concurrency, performance optimisation and fault-tolerant design.
• Experience with Pub/Sub messaging.
• Ability to solve complex technical challenges and deliver production-ready software.
• Comfort working autonomously in a fast-paced engineering environment.
• Open to using AI development tools while maintaining engineering quality.
• Experience with Kafka, RabbitMQ or NATS is a plus.

Responsibilities

• Join our team responsible for the core messaging platform that underpins our real-time infrastructure.
• Design and build new platform capabilities for highly scalable distributed systems.
• Improve performance and reliability across our platform.
• Solve complex engineering problems at scale.
• Contribute to low latency messaging, Pub/Sub services, state synchronisation and AI communication infrastructure.
• Deliver production-grade software used by developers worldwide.
• Work in an AI-first engineering environment, leveraging modern AI tools while owning architecture and code quality.

Skills

Go

Node.js

Backend development

Distributed systems

Pub/Sub messaging

Scalability

Concurrency

AI tools

Tools

Kafka

RabbitMQ

NATS

Streaming systems

Cloud infrastructure

Job description

Client Server is seeking an experienced backend-focused engineer to join a real-time messaging platform powering developers and businesses. You will work with Go, Node.js, and modern server-side technologies in a flexible, remote-friendly setup with a North London office for occasional collaboration.

The role emphasizes building scalable distributed systems, optimizing performance, and contributing to AI-enabled development workflows, while maintaining ownership of architecture and code quality.