Senior Software Engineer

Barclays UK; Fleet; On-site; GBP 60,000 - 80,000; Full time

Job summary

A major international bank in Fleet is seeking a Senior Software Engineer to join its Barclays Payments Merchant Services team. You'll be responsible for modernizing the technology stack and ensuring high-quality releases that impact millions of transactions daily. This role emphasizes collaboration, requiring expertise in Java development, SQL, and legacy application management. The position also encourages innovative problem-solving and adherence to secure coding practices while delivering scalable software solutions.

Qualifications

• Extensive experience with large legacy applications, troubleshooting, and modernizing architectures.
• Ability to design and implement enterprise-grade applications using object-oriented methods.
• Proficient in writing advanced SQL queries and tuning database performance.

Responsibilities

• Design, develop and improve software using various engineering methodologies.
• Develop and deliver high-quality software solutions ensuring performance and scalability.
• Collaborate across teams to align software with business objectives.

Skills

Java development

SQL

Legacy application troubleshooting

RESTful API design

Application server experience (JBoss)

Distributed systems knowledge

Job description

Join us as a Senior Software Engineer and help shape the future of Barclays Payments Merchant Services. We build secure, scalable solutions that let merchants process payments with ease. Every day, we support millions of transactions that keep businesses moving. In this role, you’ll help modernize our technology stack and create innovative payment experiences. You’ll also maintain and improve the core legacy application that powers these services.

Your work will make a real impact on how people and businesses pay and get paid. You’ll collaborate with teams across the business to deliver high-quality releases, assist with testing, and ensure smooth deployments. We value your ideas and encourage you to share your perspective as we transform our systems.

To be successful as a Senior Software Engineer, you should have experience with:

• Extensive experience working with large legacy applications, including troubleshooting, adding new features and applying strategies to modernize and integrate monolithic architectures.
• Java development, with the ability to design and implement enterprise‑grade applications using object‑oriented design approaches and optimize performance.
• SQL, including writing advanced queries, tuning database performance, and ensuring data integrity across large‑scale transactional systems.

Some other highly valued skills may include:

• Designing secure and scalable RESTful APIs with clear documentation and versioning best practices.
• Practical experience with application servers, ideally JBoss, including deploying, configuring, and tuning applications for high availability and resilience in production environments.
• Familiarity with distributed systems concepts and modernization approaches, even if microservices adoption is limited due to legacy constraints.

You may be assessed on the key critical skills relevant for success in role, such as risk and controls, change and transformation, business acumen, strategic thinking and digital and technology, as well as job‑specific technical skills.

This role will be based in Fleet.

Purpose of the role

To design, develop and improve software, utilising various engineering methodologies, that provides business, platform, and technology capabilities for our customers and colleagues.

Accountabilities

• Development and delivery of high‑quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance.
• Cross‑functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives.
• Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing.
• Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth.
• Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions.
• Implementation of effective unit testing practices to ensure proper code design, readability, and reliability.

Assistant Vice President Expectations

• To advise and influence decision making, contribute to policy development and take responsibility for operational effectiveness. Collaborate closely with other functions/ business divisions.
• Lead a team performing complex tasks, using well developed professional knowledge and skills to deliver on work that impacts the whole business function. Set objectives and coach employees in pursuit of those objectives, appraisal of performance relative to objectives and determination of reward outcomes.
• If the position has leadership responsibilities, People Leaders are expected to demonstrate a clear set of leadership behaviours to create an environment for colleagues to thrive and deliver to a consistently excellent standard. The four LEAD behaviours are: L – Listen and be authentic, E – Energise and inspire, A – Align across the enterprise, D – Develop others.
• OR for an individual contributor, they will lead collaborative assignments and guide team members through structured assignments, identify the need for the inclusion of other areas of specialisation to complete assignments. They will identify new directions for assignments and/ or projects, identifying a combination of cross functional methodologies or practices to meet required outcomes.
• Consult on complex issues; providing advice to People Leaders to support the resolution of escalated issues.
• Identify ways to mitigate risk and developing new policies/procedures in support of the control and governance agenda.
• Take ownership for managing risk and strengthening controls in relation to the work done.
• Perform work that is closely related to that of other areas, which requires understanding of how areas coordinate and contribute to the achievement of the objectives of the organization sub‑function.
• Collaborate with other areas of work, for business aligned support areas to keep up to speed with business activity and the business strategy.
• Engage in complex analysis of data from multiple sources of information, internal and external sources such as procedures and practises (in other areas, teams, companies, etc).to solve problems creatively and effectively.
• Communicate complex information. 'Complex' information could include sensitive information or information that is difficult to communicate because of its content or its audience.
• Influence or convince stakeholders to achieve outcomes.

All colleagues will be expected to demonstrate the Barclays Values of Respect, Integrity, Service, Excellence and Stewardship – our moral compass, helping us do what we believe is right. They will also be expected to demonstrate the Barclays Mindset – to Empower, Challenge and Drive – the operating manual for how we behave.