Posted 21 July, 2026
Principal Engineer (Payments)
INTEC SELECT LIMITED
London, ENG, GB
Full Time
Job Description
Principal Engineer (Payments)Our long-term trusted partner, a leading financial services corporation, is hiring a Principal Engineer to drive the development and design of several greenfield retail banking platforms as our clients rebuild their product portfolio as they continue on their digitial transformation journey.This is a senior leadership position where the chosen engineer will lead real-time architectural decision making leading vision & strategy across Faster Payments, Real-Time Payments, Card payments, BACS, mobile wallets and APIs.Our client is paying a basic salary up to £110,000 (circa) + 25% bonus + benefits to be based in London, Chatham (Kent) or Wolverhampton onsite 2 days per week. Our client is seeking experienced engineers with recent retail / digital banking experience who can design new product roadmaps, focus on architectural challenges, and provide hands-on technical leadership to a team of engineers. Your responsibilities will include:\n
- \n
- Lead the development and implementation of a modern cloud foundation and data platform that is robust, scalable, fully automated, secure, and can support the growth of the business. \n
- Build Scalable Architectures: Leverage modern technologies to design and implement scalable, secure, and high-performing cloud-native solutions. \n
- API Development and Integration: Design and build secure RESTful and GraphQL APIs, ensuring seamless integration with core banking systems (e.g., Mambu) and external services like Open Banking platforms. \n
- Data Engineering and Analytics: Work closely with data teams to define robust data pipelines and scalable cloud-based data platforms using tools like Apache Kafka, Snowflake, or Databricks. \n
- Monitoring and Performance Tuning: Implement advanced monitoring and observability solutions using tools like Prometheus, Grafana, or Datadog to proactively identify and resolve performance bottlenecks. \n
- Code and System Optimisation: Proactively analyse and optimise existing systems for improved performance, scalability, and maintainability. \n
- \n
- Strong experience building and scaling banking payment systems including either Faster Payments, Real-Time Payments, Card payments, BACS, mobile wallets and APIs is a must have. \n
- Experience leading upon architectural challenges, system scalability, and guidance of engineering teams is a must. \n
- A background in Java, C#, Python, or React development with experience providing hands-on technical leadership is a must. \n
- Strong background in core banking systems/platforms (Mambu), cloud-native architectures, microservices and DevOps practices \n
- Solid understanding of regulatory, risk and compliance requirements (e.g. PSD2, PCI DSS, GDPR) \n
- Experience with cloud platforms (AWS, Azure or GCP) and modern data platforms \n
