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Principal Software Engineer

Principal Software Engineer

Hybrid

Luton, United kingdom

Senior

Freelance

12-01-2026

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Skills

Test Architecture Software Development

Job Specifications

Job Title: Pricipal Software Engineer

Location: Luton (Hybrid: 4 days on-site, 1 day remote)

Contract: 12 months

IR35: Inside IR35

Security Clearance: Full UK SC required

Position Overview

My client is looking for a Pricipal Software Engineer with strong ADA experience to support Defensive Aids development within their Electronic Warfare function. You’ll contribute to the design, build, test and ongoing support of both current and next-generation capabilities across the Praetorian product line.

Key Responsibilities

Produce high-integrity, mission-critical embedded software in ADA, supporting requirements capture, design, implementation and verification in line with company processes and customer expectations.
Own complex engineering tasks end-to-end across the full software lifecycle: requirements, architecture/design, coding, integration, test and delivery.
Work closely with hardware, firmware and systems engineering teams to deliver robust cross-discipline solutions, while operating autonomously within your area of responsibility.

Requirements

Strong/expert proficiency in Ada, including object-oriented design principles.
Proven ability to debug in a real-time embedded environment using a COTS RTOS.
Working knowledge of UML.
Solid understanding of Verification & Validation methods and when to apply them.
Experience with requirements engineering, hands-on integration and target/embedded testing.
Familiarity working within a structured, mature software development framework.

Looking forward to speaking with you!

About the Company

CBSbutler is a multi-award winning recruitment firm specialising in technical appointments across global industries. The company has won no less than 20 major business awards over the last decade and notably, ‘Best Engineering’ category in the ‘Recruiter Awards for Excellence’ on 6 separate occasions. The company has been consistently listed in the Recruiter Hot 100, together with Best Companies 3* rating for employee engagement. Moreover, the company ranked #24 in the 2016 Sunday Times ‘Best Small Companies to work for’... Know more