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Job Description
Our client, a mission‑led consultancy, is looking for an experienced Principal Software Engineer (Java) to join their growing team.
They deliver secure, modern software solutions to the UK Government and Defence sectors, enabling clients to build scalable systems and progressive web applications that drive real impact.
This is a senior‑level opportunity for a hands‑on engineer who enjoys leading by example, thrives in agile environments, and is passionate about shaping engineering best practice while still contributing to the codebase.
Key Responsibilities
* Lead the design, development, and testing of secure, scalable systems using Java with modern front‑end frameworks (e.g., React)
* Architect and maintain APIs, data pipelines, and cloud‑native solutions (AWS, Azure, private cloud)
* Drive adoption of DevOps practices: CI/CD, containers, infrastructure‑as‑code
* Guide and mentor engineers, promoting best practice, clean coding, and agile delivery
* Collaborate with stakeholders and clients to shape technical direction and ensure robust, user‑focused solutions
* Contribute across the full software development lifecycle, from discovery to production support
Essential Skills & Experience
* 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
Desirable
* Background in secure or classified environments
* Knowledge of ITSM or systems within the government/defence sector
* Experience balancing technical leadership with hands‑on development
Whats in It for You
* Flexible working 37.5 hrs/week with remote and hybrid options
* Learning & development budget for training, certifications, and conferences
* Private healthcare & matched pension scheme
* Monthly socials and quarterly company meetups
* Clear career progression into leadership roles in a high‑impact sector
Diversity & Inclusion
Our client is an equal opportunities employer and a Disability Confident organisation, committed to fostering a workplace where diverse perspectives are celebrated and everyone can thrive.
How to Apply
If you’re an experienced Principal Software Engineer with expertise in Java, and you’re excited to help deliver solutions that truly matter, we would love to hear from you.
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)
Why Is This a Great Opportunity
* Flexitime: 37.5 hrs/week structured your way + remote options
* Learning budget for training, certifications, and conferences
* Private healthcare and matched pension
* Monthly socials and quarterly company meetups
* Career growth in a fast‑moving, meaningful sector
Salary
* Salary Type: Annual Salary
* Salary Min: £45,000
* Salary Max: £70,000
* Currency Type: GBP
Seniority level
Mid‑Senior level
Employment type
Full‑time
Job function
Engineering and Information Technology
Industries
Staffing and Recruiting
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