Backend Engineer - Payments & Billing Automation

Xapply; Greater London; Hybrid; GBP 88,000 - 111,000; Full time

Benefits offered by this job

Wise Benefits

Job summary

Wise is building a new network for the world's money. You will design and implement secure, auditable pricing and billing services, collaborating across teams to ensure reliability and performance.

The role emphasizes long-term ownership, incident response, and inclusive, scalable architecture with modern tech like Kafka, MongoDB, and MariaDB. We value engineers who balance speed with safety, contribute to governance and best practices, and mentor others while supporting external partner

Qualifications

• Strong software engineering fundamentals and track record of impactful projects.
• Experience with Java or a similar OO language.
• Ability to design systems with long-term perspective and scalable patterns.
• Accountability for availability, reliability, and security of systems.
• Balance speed, scalability and risk with resilience and safety.
• Address technical debt pragmatically within risk constraints.
• Commitment to observability, security, testing, and responsible data usage.

Responsibilities

• Design and build end-to-end features across pricing and billing services.
• Contribute to architectural decisions and code reviews to raise quality and reliability.
• Improve resilience and scalability of systems for partners and financial ops.
• Work with event-driven architectures (Kafka) with MongoDB and MariaDB.
• Use AI tooling to assist delivery and code quality.

Skills

OOP programming

Java

System design

Reliability

Security

Observability

Testing

Data handling

Tools

Kafka

MongoDB

MariaDB

Job description

Wise is building a new network for the world's money. You will design and implement secure, auditable pricing and billing services, collaborating across teams to ensure reliability and performance.

The role emphasizes long-term ownership, incident response, and inclusive, scalable architecture with modern tech like Kafka, MongoDB, and MariaDB. We value engineers who balance speed with safety, contribute to governance and best practices, and mentor others while supporting external partner