Backend Developer Golang Node Pub / Sub

Client Server; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

EMI share options

28 days annual leave

Pension

Life Assurance

Sabbatical after five years

Gym subsidies

Job summary

Client Server is seeking a Backend Developer / Software Engineer to join our real-time messaging platform. You will work on low-latency, distributed systems, Pub/Sub services, and next‑gen AI‑driven infrastructure, delivering production‑grade software with ownership of architecture and code quality.

The role supports Remote / Hybrid work with occasional in-person meetups in North London. You will engage in scalable, event-driven design and collaborate across engineering to push performance and

Qualifications

• Backend development with Go/Node.js or other modern server-side language.
• Experience building or operating distributed systems or messaging platforms.
• Understanding of scalability, concurrency and fault-tolerant design.
• Experience with Pub / Sub messaging systems.
• Familiarity with streaming systems and cloud infrastructure advantageous.

Responsibilities

• Design and build core messaging platform features for real-time infrastructure.
• Improve performance, reliability and scalability of distributed systems.
• Deliver production‑grade software and ensure code quality and maintainability.
• Collaborate autonomously in a fast-paced engineering environment.

Skills

Go

Node.js

Distributed systems

Pub / Sub

Kafka

RabbitMQ

NATS

Job description

Backend Developer / Software Engineer (Go / Node Pub / Sub) Remote / Hybrid to £120k + Equity

Are you an experienced Backend Developer who enjoys building distributed systems, real-time infrastructure and solving complex scalability challenges?

You could be progressing your career at a high growth technology company whose messaging platform powers millions of real-time interactions for developers and businesses worldwide.

Your role:

As a Backend Developer, you'll join the team responsible for the core messaging platform that underpins the company's real-time infrastructure. Working on highly scalable distributed systems, you'll design and build new platform capabilities, improve performance and reliability and solve complex engineering problems at scale.

You'll contribute across low latency messaging, Pub / Sub services, state synchronisation and next generation AI communication infrastructure, delivering production grade software used by developers around the globe.

Working in an AI first engineering environment, you'll leverage modern AI tools to accelerate development while retaining full ownership of architecture, code quality and technical decision-making.

Location / WFH:

You can work from most of the time, collaborating via Slack and meeting up with the team at the dog friendly office in North London for tech talks, lunch and learn events etc. around once a month.

About You

• You have strong backend development experience with Go, Node.js or another modern server-side language
• You have experience building or operating distributed systems, messaging platforms, event-driven architectures or streaming technologies
• You understand scalability, concurrency, performance optimisation and fault tolerant system design
• You have experience with Pub / Sub messaging
• You enjoy solving complex technical challenges and delivering high quality, production ready software
• You're comfortable working autonomously in a fast-paced engineering environment
• You embrace modern AI development tools while maintaining a strong focus on engineering quality
• Experience with Kafka, RabbitMQ, NATS, streaming systems, developer platforms or cloud infrastructure is highly advantageous

What's in it for you:

As a Backend Developer / Software Engineer will earn a competitive salary package including:

• Salary to £120k
• EMI share option scheme
• 28 days annual leave
• Enhanced maternity and parental leave packages
• Your choice of kit and home-station set up
• Personal learning and development budget (£1000 p/a + 5% time to work on your own projects)
• BUPA Health Insurance + dental costs + mental health and wellness
• Pension, Life Assurance, Income Protection
• Fully paid one month sabbatical at five years' service
• Gym subsidies, Cycle to work scheme and more