Job Title: Senior Software Engineer I
Industry: Payments Technology / Fintech
Location: UK & Ireland
Salary: £60,000
Type: Permanent, Full-time

Our client, a high-growth, multi-national payments technology company, is building the next generation of capabilities to power its merchant-first ecosystem. They are looking for a Senior Software Engineer to join a dynamic development center, designing and building backend, service, and portal systems on a large, actively modernized payments platform built on Java and Spring.

The Role:

• Design and develop backend, service, and portal systems on the payment processing platform
• Work across a variety of languages, frameworks, libraries, and services using modern software techniques, including Behavioral Driven Development and CI/CD
• Understand merchant and partner needs and deliver high-quality, innovative solutions that add value
• Improve software development processes, methodologies, and tools through automation and simplification
• Collaborate with team members to ensure deliverables are technically accurate and delivered on time
• Identify critical project activities, assist with estimation and planning, and communicate status and issues clearly
• Assist with software deployment activities from internal test environments through to production
• Operate effectively across a range of project types, from solo work to large team collaboration

Skills Needed:

• 5-7 years of Software Engineering experience
• BS or MS in Computer Science or related field
• Experience with Linux or Windows development, including relational database design (ideally Oracle and Hibernate)
• Professional experience building server-side systems in Java, using Spring, REST APIs, and asynchronous messaging
• Experience with Design Patterns, Refactoring, and OO Design
• Comfortable working in large, multi-module codebases, balancing new features with ongoing modernization
• Proficiency with AI-assisted coding tools (e.g., Claude Code) and strong judgment in applying agentic AI tools effectively

Benefits

• Opportunity to work on a large-scale, long-lived payments platform under active modernization
• Autonomous, low-bureaucracy working culture ("small teams, big things")
• Exposure to a wide variety of languages, frameworks, and modern engineering practices (BDD, CI/CD, AI-assisted development)
• Genuine career development and mentorship opportunities
• Flexibility to work across projects ranging from solo initiatives to large team efforts
• Strong focus on quality, innovation, and end-user impact

Research indicates that men will apply to a role when they meet only 50–60% of the requirements, while women and other underrepresented groups often look for a 90–100% match. If this role excites you but you don't tick every single box, please still apply. We'd love to hear from you.