Mulesoft Lead Engineer; SC Clearance required

NTT DATA UK is seeking a Mule Soft Engineer to join our growing practice. You will be part of an agile team building digital products, enhancing and developing software components. Your main responsibility will be to deliver clean, maintainable, and well‑tested code that adheres to SOLID principles. You will work collaboratively across Quality Assurance, Dev Ops, and other development teams, sharing knowledge, supporting onboarding, and contributing to code reviews.

Due to the nature of the work/client you must have or be eligible for SC Clearance (British Passport holder or 5 years continuous residence in the UK).

• Manage data exchange between backend services, front‑end applications, and third‑party APIs.
• Develop server‑side logic in collaboration with Business Analysts and QA, ensuring requirements are met and code is testable.
• Lead and contribute to technical user stories, focusing on integration and service optimisation.
• Document solutions using diagrams, flowcharts, and clear code comments.
• Ensure compliance with quality standards, including automated testing and code reviews.
• Address non‑functional requirements such as performance, monitoring, and operational support.
• Support releases through all development environments, maintaining quality and reliability.
• Contribute to skill development and technology adoption within the team.
• Present technical concepts in demos and participate in user feedback sessions.
• Provide accurate work estimates and support agile planning.
• Balance delivery pace with documentation, test automation, and technical debt reduction.

• Experience delivering integration microservices using Mule Soft best practices.
• Proven ability to write clean, maintainable code following SOLID principles.
• Designing RAML, REST APIs, flow control, and error handling.
• Hands‑on experience with the Anypoint Platform (Cloud Hub, VPC, VPN, DLB, firewalls, and cloud technologies).
• Securing and managing APIs using API Manager.
• Developing frameworks for error handling and logging.
• Managing the API development lifecycle from design to governance and management.
• Working with batch message processing, Salesforce, file, and database connectors.
• Using MUnit and practising test‑driven development.
• Experience with REST, HTTP, MQ, JSON, XML, and SOA.
• Familiarity with CI/CD pipelines (Maven, Jenkins, Bitbucket, Git, Mule Soft).

• Experience working in consulting or public sector environments.
• Experience as a microservices developer.
• Mule Soft certification.

• Typically, candidates have substantial experience in Mule Soft integration development, but we welcome applicants with a range of backgrounds and relevant skills.
• Degree in a relevant field (e.g. Computer Science, Statistics) or equivalent practical experience.
• Eligible for SC clearance (requires 5 years' residency in the UK; citizenship is not mandatory).
• Able to adapt to changing priorities and client needs.

We offer a range of tailored benefits that support your physical, emotional, and financial wellbeing. Our Learning and Development team ensures continuous growth and development opportunities for our people. We also offer the opportunity to have flexible work options.

We are an equal opportunities employer. We believe in the fair treatment of all our employees and commit to promoting equity and diversity in our employment practices. We are also a proud Disability Confident Committed Employer – we are committed to creating a diverse and inclusive workforce. We actively collaborate with individuals who have disabilities and long‑term health conditions that affect their ability to do normal daily activities, ensuring that barriers are eliminated when it comes to employment opportunities.

In line with our commitment, we guarantee an interview to applicants who declare to us, during the application process, that they have a disability and meet the minimum requirements for the role. If you require any reasonable adjustments during the recruitment process, please let us know.

We're a business with a global reach that empowers local teams, and we undertake hugely exciting work that is genuinely changing the world. Our advanced portfolio of consulting, applications, business process, cloud, and infrastructure services will allow you to achieve great things by working with brilliant colleagues and clients on exciting projects. Our inclusive work environment prioritises mutual respect, accountability, and continuous learning for all our people.

This approach fosters collaboration, well‑being, growth, and agility, leading to a more diverse, innovative, and competitive organisation. We are also proud to share that we have a range of Inclusion Networks such as the Women's Business Network, Cultural and Ethnicity Network, LGBTQ+ & Allies Network, Neurodiversity Network and the Parent Network.