Java Software Engineer

Core Java Engineer

Hybrid Working – London OR Edinburgh– 2 days a week on site.

Financial Services

Lorien's leading banking client is looking for Core Java Engineers to join a high-performing engineering team delivering customer-facing payment and card technology solutions.

This is an opportunity to work on a large-scale digital payments platform covering Click to Pay, Cards and Apple Pay integrations , with significant API development and modern cloud-native engineering practices at its core.

You'll be joining a team responsible for enhancing critical customer journeys, supporting upcoming mobile releases, and driving the evolution of a complex payments ecosystem that integrates with TSYS , core banking platforms, and a broad range of internal and external APIs.

This role is based in London OR Edinburgh.

This role will be Via Umbrella.

Working in a Hybrid Model of 2 days a week on site.

Key Responsibilities

• Design, develop and maintain Java-based microservices
• Build and enhance APIs supporting cards, payments and digital banking journeys
• Develop cloud-native applications within AWS
• Work across integrations with TSYS, core banking systems and third-party payment providers
• Support delivery of major mobile application releases
• Contribute to engineering best practices, CI/CD and automation
• Collaborate with cross-functional teams to improve customer experience and platform performance

Essential Skills & Experience

• Strong commercial experience with Java
• Proven experience building microservices architectures
• Strong API development and integration experience
• Experience working within AWS cloud environments
• Background in financial services , retail banking, payments or cards
• Experience delivering customer-facing digital products
• Knowledge of modern software engineering practices, testing and DevOps

Desirable Experience

• Payments, cards or acquiring platforms
• Click to Pay implementations
• Apple Pay integrations
• TSYS exposure
• Core banking platform integration experience
• Mobile banking or digital channel delivery experience

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