Senior Backend Engineer - Pub/Sub & Distributed Systems

Dex; United Kingdom; On-site; GBP 90,000 - 150,000; Full time

Job summary

Dex partners with a company that builds the core infrastructure for planet-scale real-time data, delivering billions of messages daily to millions of devices for major global brands.

You’ll join the Pub/Sub team, the technical backbone of the platform, owning design, development and optimization of highly reliable systems with an AI-first culture and strong emphasis on human judgement.

Qualifications

• Commercial, production experience with distributed systems, performance analysis, and large-scale infrastructure.
• Proven track record building or working with messaging queues and/or pub/sub systems at real scale.
• Extensive experience with a high-level server-side language; Node.js or Go preferred.
• A strong, hands-on coder who can clear a deliberately tough technical bar.
• Practical experience using AI tooling to accelerate development, with clear understanding of human rigour.

Responsibilities

• Design, develop, and deploy core backend services, relentlessly focused on low latency, high availability, and scalability.
• Drive new functionality and initiatives to scale and improve the Pub/Sub platform.
• Ship new features, implement performance improvements, and execute maintenance for planet-scale infrastructure.
• Leverage AI tools for rapid planning, prototyping, and iteration, while owning technical decisions and quality.

Tools

Distributed systems

Messaging queues

Pub/Sub

Node.js

Go

AI tooling

Performance analysis

Job description

Dex partners with a company that builds the core infrastructure for planet-scale real-time data, delivering billions of messages daily to millions of devices for major global brands.

You’ll join the Pub/Sub team, the technical backbone of the platform, owning design, development and optimization of highly reliable systems with an AI-first culture and strong emphasis on human judgement.