Principal Engineer (Payments)

Salary: £90,000 - 115,000 per year

Requirements:

• Strong experience building and scaling banking payment systems, including Faster Payments, Real-Time Payments, Card payments, BACS, mobile wallets, or APIs
• Experience leading architectural challenges, system scalability, and providing guidance to engineering teams
• Background in Java, C#, Python, or React development, with hands-on technical leadership experience
• Strong background in core banking systems/platforms, cloud-native architectures, microservices, and DevOps practices
• Solid understanding of regulatory, risk, and compliance requirements such as PSD2, PCI DSS, and GDPR
• Experience with cloud platforms such as AWS, Azure, or GCP, and modern data platforms

Responsibilities:

• Lead the development and implementation of a modern cloud foundation and data platform that is robust, scalable, fully automated, and secure
• Design and implement scalable, secure, and high-performing cloud-native architectures using modern technologies
• Design and build secure RESTful and GraphQL APIs, ensuring seamless integration with core banking systems and external Open Banking services
• Work closely with data teams to define robust data pipelines and scalable cloud-based data platforms
• Implement monitoring and observability solutions to proactively identify and resolve performance bottlenecks
• Analyse and optimise existing systems for improved performance, scalability, and maintainability

Technologies:

• AWS
• Azure
• C#
• Cloud
• DevOps
• GCP
• GraphQL
• Java
• Mobile
• Python
• React
• microservices
• API
• Databricks
• Datadog
• Grafana
• Support
• Kafka
• Prometheus
• Snowflake

More:

We are a long-term trusted partner to a leading financial services corporation that is rebuilding its retail banking product portfolio as part of a digital transformation journey. This is a senior leadership role focused on real-time architectural decision-making across payments and APIs. The position is based in London, Chatham (Kent), or Wolverhampton, with onsite working 2 days per week. We offer a salary up to £110,000, a 25% bonus, and benefits including 28 days holiday, a holiday purchase scheme, occasional travel, health insurance, a 13% pension, and more.

last updated 30 week of 2026