Senior Java Engineer — Hybrid FinTech, Real-Time Payments

X4 Technology; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Ongoing training

Career progression

Wellbeing initiatives

Lifestyle benefits

Job summary

X4 Technology is hiring a Senior Software Engineer to join a hybrid fintech product engineering team. You will help integrate a market-leading platform that handles high-volume, real-time payments, contributing to scalable and resilient applications.

The role emphasizes collaboration, code quality, and architectural input. You’ll work with Java 11+, Spring, and reactive programming, and gain exposure to distributed systems, CI/CD, and Agile delivery in a FinTech environment.

Qualifications

• Proficient in Java 11+ with Spring framework.
• Experience in building reactive, event-driven architectures.
• Knowledge of CI/CD pipelines and Agile delivery practices.
• Designing scalable, highly-available applications for fintech/payments.
• Experience with Akka, Docker, Kubernetes, MongoDB, Angular or Ansible is a plus.

Responsibilities

• Write high-quality, reusable code for scalable payments platform.
• Collaborate on architectural decisions and engineering best practices.
• Contribute to real-time payment processing and system resilience.

Skills

Java 11+ and Spring

Reactive Programming

CI/CD and Agile delivery

Distributed systems design

Fintech/payments domain experience

Tools

AKKA

Docker

Kubernetes

MongoDB

Angular

Ansible

Job description

X4 Technology is hiring a Senior Software Engineer to join a hybrid fintech product engineering team. You will help integrate a market-leading platform that handles high-volume, real-time payments, contributing to scalable and resilient applications.

The role emphasizes collaboration, code quality, and architectural input. You’ll work with Java 11+, Spring, and reactive programming, and gain exposure to distributed systems, CI/CD, and Agile delivery in a FinTech environment.