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Salary
≈ $92k – $163k per year (Estimated)
Location
In office (London)
Seniority
Architect
Visa
Licensed UK visa sponsor

Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Oct 15, 2026.

Overview
Company
Impact
Profile match
Arqit is a London cybersecurity company founded in 2017 that supplies symmetric key agreement software designed to resist quantum attack. Its product distributes rotating encryption keys to endpoints and cloud services without relying on the public key mathematics that quantum computers threaten. The company works with defence, telecommunications and financial customers preparing for post-quantum migration.

Arqit is a global cybersecurity company delivering world-leading encryption solutions to secure data and communications for enterprises, governments, defence, and critical national infrastructure (CNI). Powered by advanced symmetric key cryptography, the Arqit SKA-Platform™ offers scalable dynamic encryption that meets modern industry standards and is resilient to future threats, such as those posed by quantum computers. The platform allows devices to seamlessly generate and share secure symmetric encryption keys, reducing the vulnerabilities associated with public key infrastructure (PKI) while operating with zero-trust and Secure by Design (SbD) principles

We have an exciting new opportunity for a Solution Architect (Defence & Government Specialist) to join our talented Professional Services team, reporting to the Director of Professional Services and collaborating closely with the Sales team.

Our offices are conveniently located close to Westminster, St James Park and Victoria stations and we support considerable flexibility around working from home or remotely, with frequent opportunities to travel both in the UK and internationally.  The company has been growing fast which means there are plenty of opportunities for your career progression at Arqit as we scale up, but we're still very much a fast-paced start-up environment.

Our team culture is based on collaboration and communication, providing an environment where innovation and ownership of outcomes is enabled and rewarded, allowing you expand your skills and knowledge, and accelerate your career as we grow.

The successful candidate will thrive in a fast-paced environment and will enjoy working for an exciting and innovative technology company. You will have a genuine passion for cybersecurity, networking, data protection and enjoy problem solving.

What you'll be doing

  • As a Solution Architect with a Defence and Government focus, you will take advantage of your deep experience in networking and secure communications to help deliver on the Arqit vision.
  • This is a customer-focused role that will require you to deliver technical presentations and demonstrations, understand customer needs, develop and deliver solutions for live projects, and support pre-sales with active bids and engagements.
  • You will also deliver and develop training and product demonstrations, work with our R&D and product teams to help develop our services and be a customer advocate within Arqit.

What we're looking for

  • Prior experience building secure networks in the context of military, defence or CNI
  • Superb analytical and problem-solving skills
  • Strong customer relations and presentation skills
  • Excellent time and project management skills
  • Deep understanding of software/network architectures with the ability to identify integration points rapidly
  • Ability to travel in the UK and internationally
  • Ability to work in the UK and ability to gain UK security clearance are both essential

Useful to have but not essential

  • Comfortable working with Linux-based operating systems
  • Experience with cybersecurity and networking (next-gen firewalls, VPN gateways, etc.)
  • Experience of rolling out technical projects across IT platforms
  • Experience working with cloud computing platforms such as OCI, Azure and AWS
  • Experience working with containerisation platforms such as Docker
  • Ability to develop software in C++, Java and/or Python
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