API Software Engineer

About the role

Barclays is looking for an API Software Engineer to design, develop and support secure, scalable API solutions that power its digital platforms. You will work within Agile engineering teams, delivering innovative technology while ensuring risk management, operational resilience and engineering excellence.

Key responsibilities

• Develop high‑quality software solutions using Java, Spring Boot and micro‑service architectures.
• Design and implement event‑driven data streaming with Apache Kafka.
• Collaborate with product managers, designers and other engineers to define requirements and integrate solutions.
• Participate in code reviews, promote code quality and share knowledge across the team.
• Maintain secure coding practices, perform unit testing and ensure performance optimisation.

Required profile

• Proven experience developing robust, scalable enterprise applications in Java.
• Hands‑on experience building micro‑services with Spring Boot.
• Strong knowledge of event‑driven architecture and Apache Kafka.
• Understanding of API security standards such as OAuth 2.0, OpenID Connect and mutual TLS.
• Experience with containerisation using Docker.

Required skills

• Java
• Spring Boot
• Apache Kafka
• MongoDB and other NoSQL databases
• Relational database design and SQL
• OAuth 2.0, OpenID Connect, mTLS, IAM
• Docker
• Security tooling (Wiz, Prisma Cloud, SCA solutions)