Senior Java Software Engineer

Principal Java Developer – Fully Remote

The Opportunity

Ocho is partnering with a fast-growing, product-led fintech that’s building out a brand-new Development Centre from the ground up to deliver an innovative Greenfield payments platform.

As a Principal Java Developer, you’ll be hands-on in designing and developing backend, service, and portal systems that power secure, scalable payment processing. You’ll work with a modern stack, agile practices, and an engineering culture that values autonomy, technical excellence, and collaboration — without the red tape.

Why Join?

• Be part of a team shaping a new product suite from concept to release.
• No legacy systems – you’ll work with modern tools, frameworks, and automation from day one.
• A culture that empowers engineers to focus on solving complex problems, not battling process.
• Continuous improvement built into the DNA – from BDD to CI/CD pipelines and beyond.
• Full ownership of your deliverables from design through deployment.

Key Responsibilities

• Design, develop, and maintain backend systems focused on performance, scalability, and security.
• Understand client and partner needs, translating them into high-quality, innovative software solutions.
• Contribute to all stages of the SDLC – from requirements analysis to release and post-deployment verification.
• Collaborate across engineering teams to ensure deliverables are technically accurate, testable, and on time.
• Lead technical discussions around architecture, tooling, and process improvements.
• Support deployments to internal test environments and production data centres.
• Mentor and guide team members, promoting best practices in software delivery.

Essential Experience

• 8+ years’ experience in backend engineering, ideally within a Fintech or high-availability environment.
• Expert-level Java / J2EE development, including design patterns, OO design, and refactoring.
• Proven experience delivering secure, scalable, high-quality services in production.
• Hands-on with JPA2, Hibernate, and MySQL 8 (InnoDB).
• Strong understanding of REST API design (JAX-RS, RESTEasy, OpenAPI, Swagger).
• Experience building fault-tolerant, multi-threaded systems and working with load balancing concepts.
• Familiarity with CI/CD, automation, and Behavioural Driven Development (BDD).
• Comfortable deploying applications on cloud infrastructure (AWS, GCP, or Azure).
• Excellent communication, analytical, and problem-solving skills.

Desirable Skills

• Experience with Infinispan, JGroups, or clustered caching solutions.
• Exposure to NoSQL databases (e.g. BigQuery).
• Familiarity with Pub/Sub, WebSocket integrations, or Ansible automation.
• Working knowledge of HTML, JavaScript, or portal-layer integration.
• Background in secure payment systems (PCI-DSS compliance).

What’s on Offer?

• Salary up to £100k + annual bonus
• Fully remote working (UK-based)
• Industry-leading benefits package
• A modern engineering environment with autonomy, trust, and cutting-edge technology

To apply, connect with Neill Ferguson on LinkedIn or submit your CV via the link below.