Senior Backend Engineer - Real-Time AI Payments

Worldpay (UK) Limited; City Of London; On-site; GBP 120,000 - 150,000; Full time

Job summary

Global Payments in London is seeking a Senior Software Engineer, Agentic Commerce, to join a greenfield squad building secure backend services enabling AI agents, merchants, and risk systems to operate in real time.

You'll own design and implementation of Java-based backends, REST APIs, and integrations across cloud environments, with focus on reliability, security, and observability. Collaboration across product, security, fraud, and gateway teams is essential.

Qualifications

• 5+ years of software engineering experience with production services or distributed systems.
• Experience building cloud-based systems on AWS or GCP with focus on reliability and security.
• Interest in AI agents and agentic workflows, API usage, and validation before real-world actions.

Responsibilities

• Design and build secure checkout and payment APIs for agentic commerce.
• Develop Java-based backend services with real-time, high-trust workflows.
• Own features from design through testing, deployment, and production readiness.
• Collaborate with product, architecture, security, fraud, and gateway teams to deliver cross-system capabilities.

Skills

Backend engineering

API design

Java

Cloud fundamentals

Observability

Security

CI/CD

Collaboration

AI interest

Education

BS in Computer Science

Tools

Node.js

TypeScript

SDKs

GitHub

AWS

GCP

Job description

Global Payments in London is seeking a Senior Software Engineer, Agentic Commerce, to join a greenfield squad building secure backend services enabling AI agents, merchants, and risk systems to operate in real time.

You'll own design and implementation of Java-based backends, REST APIs, and integrations across cloud environments, with focus on reliability, security, and observability. Collaboration across product, security, fraud, and gateway teams is essential.