Senior Java Fullstack Lead – Secure Cloud & API Architect

NPAworldwide; England; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A mission-led consultancy in the United Kingdom seeks an experienced Principal Software Engineer (Java) to lead the development of secure, scalable systems for the UK Government and Defence sectors. This position requires deep expertise in Java, strong full-stack skills, and proven leadership experience. The role offers flexible working options, a budget for learning and development, and clear career progression opportunities.

Benefits

Flexible working

Learning & development budget

Private healthcare

Matched pension scheme

Monthly socials

Quarterly company meetups

Qualifications

• Deep expertise in Java, with strong full-stack engineering skills.
• Proven experience leading teams or projects at a senior/principal level.
• Strong knowledge of system architecture, cloud solutions, and API design.
• Familiarity with DevOps tools and automation (CI/CD, containers, IaC).
• Track record of delivering secure, production-grade systems in agile teams.
• Excellent stakeholder engagement, influencing, and communication skills.

Responsibilities

• Lead the design, development, and testing of secure, scalable systems using Java.
• Architect and maintain APIs, data pipelines, and cloud-native solutions.
• Drive adoption of DevOps practices – CI/CD, containers, infrastructure-as-code.
• Guide and mentor engineers, promoting best practices and agile delivery.
• Collaborate with stakeholders to shape technical direction and ensure robust solutions.
• Contribute across the full software development lifecycle.

Job description

A mission-led consultancy in the United Kingdom seeks an experienced Principal Software Engineer (Java) to lead the development of secure, scalable systems for the UK Government and Defence sectors. This position requires deep expertise in Java, strong full-stack skills, and proven leadership experience. The role offers flexible working options, a budget for learning and development, and clear career progression opportunities.