API Software Engineer

Barclays; Northampton; On-site; GBP 70,000 - 110,000; Full time

Job summary

Barclays is seeking an API Software Engineer based in Northampton or Glasgow to design, develop, and support secure, scalable API solutions powering Barclays’ digital platforms. Working in Agile teams, you will deliver high-quality software while managing risk and ensuring engineering excellence.

You will specialise in Java and Spring Boot, with Kafka for real-time data streaming, and will collaborate with product and design teams to translate requirements into robust solutions that meet

Qualifications

• Proven experience with Java and Spring Boot in building scalable enterprise applications.
• Experience in real-time data streaming with Kafka.
• Strong understanding of API design and software engineering best practices.

Responsibilities

• Develop and deliver high-quality software using industry-standard languages, frameworks, and tools.
• Collaborate with product managers, designers, and engineers to define requirements and strategies.
• Participate in code reviews and promote code quality and knowledge sharing.
• Stay updated on technology trends and contribute to technical communities.
• Adhere to secure coding practices and implement effective unit testing.

Skills

Java

Spring Boot

Kafka

Tools

Docker

MongoDB

SQL

Job description

Job Description

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 organisation 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.

Join us at Barclays as an API Software Engineer. As an API Software Engineer, you will design, develop, and support secure, scalable API solutions that power Barclays’ digital platforms. Working within Agile engineering teams, you’ll help deliver innovative technology solutions while ensuring strong risk management, operational resilience, and engineering excellence.

Essential Skills:

• Java - Proven experience developing robust, scalable, and high-performance enterprise applications using Java, with a strong understanding of object-oriented programming principles, design patterns, and software engineering best practices.
• Spring Boot - Hands-on experience building and maintaining microservices using Spring Boot, including RESTful API development, dependency injection, security implementation, and integration with cloud-native and distributed systems.
• Kafka - Strong knowledge of event-driven architecture and real-time data streaming using Apache Kafka. Experience designing, developing, and supporting producer and consumer applications, ensuring reliability, scalability, and performance across distributed platforms.

Desirable Skills:

• Database Technologies - Working knowledge of MongoDB and NoSQL database concepts, including schema design, indexing, query optimisation, and management of large-scale datasets, alongside strong experience with relational databases and data modelling principles.
• Security - Proficient in API and application security, including OAuth 2.0, OpenID Connect (OIDC), Mutual TLS (mTLS), IAM, secrets and certificate management, SSDLC practices, threat modelling, vulnerability management, and compliance controls. Experienced in leveraging security tools such as Wiz, Prisma Cloud, and SCA solutions for vulnerability remediation. Skilled in application observability, logging, monitoring, production resilience, high availability, and disaster recovery patterns.
• Docker - Experience containerising applications using Docker, creating and maintaining container images, and supporting deployment processes within modern DevOps and cloud environments.

This role is based in Glasgow or Northampton

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.