Principal Software Engineer
Location
Maidenhead, Berkshire
Job Type
Full-time
Category
architecture-and-engineering
Posted
June 11, 2026
Matchtech are working closely with a UK defence technology organisation delivering secure communications and cyber solutions used in mission-critical environments. Their teams build high-assurance cryptographic and key management capabilities that enable the confidential exchange of sensitive information for customers operating across tactical and strategic settings.
If you enjoy solving hard engineering problems where security, reliability, and real-world outcomes matter, this is a good fit.
Important information
Clearance
Due to the nature of the work, applicants will need to meet UK security clearance eligibility requirements (including UK residency criteria).
DV clearance is required (you must be eligible and willing to obtain and maintain DV; SC is typically required first).
Working arrangement
Fully onsite: please only apply if you can work onsite in MaidenheadThe role
You'll provide technical leadership in a software engineering team (typically ...
If you enjoy solving hard engineering problems where security, reliability, and real-world outcomes matter, this is a good fit.
Important information
Clearance
Due to the nature of the work, applicants will need to meet UK security clearance eligibility requirements (including UK residency criteria).
DV clearance is required (you must be eligible and willing to obtain and maintain DV; SC is typically required first).
Working arrangement
Fully onsite: please only apply if you can work onsite in MaidenheadThe role
You'll provide technical leadership in a software engineering team (typically ...