Principal Software Engineer jobs in Chelmsford

Principal Software Engineer .NET £90,000-£110,000 Remote (UK) Do you thrive on building scalable solutions that power commerce worldwide? We're partnering with a rapidly expanding global payment platform fresh off a transformative acquisition. They're engineering a robust, merchant-centric ecosystem built on quality, resilience, and scale - and they need exceptional .NET Software Engineers to...

Join OCI’s Edge Security team as a Principal Engineer to architect and deliver cloud-scale DDoS protection. You’ll lead design for high-performance detection and mitigation systems, drive automation and operational excellence, and set the technical direction for customer-facing DDoS capabilities across OCI’s global edge. This role requires deep expertise in Linux networking data path and...

You will be instrumental in growing the electrical design capability within an engineering consultancy that champions innovative, low-carbon building services. This is an opportunity to shape electrical strategy, influence design outcomes and mentor the next generation of engineers while working across exciting and varied projects.

Job Description 7 month contract (initially) Up to £55.56 per hour umbrella (Inside IR35) Hybrid working (up to 4 days per week on site where required in either Basildon, Bristol or Southampton as preferred) Job Role: The successful candidate will be responsible for conducting Stress Analysis, communicating the results and advising on all aspects of Structural Engineering activities. The...

Principal Engineer Read on to find out what you will need to succeed in this position, including skills, qualifications, and experience. Location:Essex Salary:£55k-£65k About the Role: Platform Recruitment has partnered with a long-established manufacturer who are seeking a Principal Engineer to provide structural, reliability, and technical analysis across a range of high-integrity products....

Principal Systems Engineer – RF / Satellite Communications Location: Hereford, Herefordshire (Hybrid – 3 days onsite) A well-established UK engineering organisation operating at the forefront of satellite communications and RF systems are looking to appoint a Principal Systems Engineer to take ownership of complex products used in critical RF / SatCom infrastructure worldwide. This role suited...

Principal Software Engineer Basildon 3-Month Contract Paying up to £70p/h (Inside IR35) Please note - due to the nature of the work, you will need to hold or be eligible to obtain a high level of UK Security clearance – please only apply if suitable Key Responsibilities: - C++ software development - Development of new applications to meet user expectations and within formal constraints -...

You will be a vital part of this evolution, contributing your expertise to our strategy and helping us redefine what services we offer our clients.

You will ensure buildings are designed to minimise fire risks, through contributing to the development of fire strategy reports, calculations and fire risk assessments.

You will be working as a Principal Systems Engineer within our close-knit multi-function radar team of inter-disciplinary engineers, evolving our radar portfolio of existing and brand-new radar products to address emerging and future threats. Join us and help shape the future of Radar technology!

Principal Engineer Location: Essex Salary: £55k-£65k About the Role: Platform Recruitment has partnered with a long-established manufacturer who are seeking a Principal Engineer to provide structural, reliability, and technical analysis across a range of high-integrity products. Youll lead analysis activities, support development and verification, and act as a key technical interface within a...

About the Role We’re seeking a Principal AI Engineer to lead the design and implementation of advanced AI solutions across our product and business ecosystem. This is a unique opportunity to define and deliver an organisation-wide AI strategy — combining hands-on technical work with cross-functional influence to drive real impact. You’ll work closely with senior technology and business leaders...

Principal Hardware Engineer Initial 12 Month Contract Full time on site Rochester, Kent £94.24 Per Hour (Umbrella Rate - Inside IR35) The Role - Executing complex hardware design tasks in accordance with the hardware development plan, whilst meeting agreed timescales and allocated budgets - Conducting hardware requirements capture, preliminary design, detailed design including a range of...

About the Team Dex is an AI-powered recruiter, matching exceptional software engineers with top tech companies. We're one of the fastest-growing UK startups, and have raised $3.1M from a16z and Concept Ventures to build a best-in-class voice agent, matching engine and web app experience that will redefine the way that talent and opportunity connect. We're hiring a Python engineer to join our...

You will be required to be on-site 3 days per week, in Basildon. This is an intial three month project - there is a strong likelihood of extension or movement onto a follow-on project depending on programme need and performance. Required Skills & Experience - Strong experience with C# / .

About the Job This position is for a Senior Software Engineer with a minimum of 5 years of experience in backend development and a passion for building robust, scalable systems. We are looking for an engineer with a strong background in the C# .NET ecosystem, and a preference for candidates with significant experience on AWS. Are you ready for a challenge? We’re looking for a dynamic software...

You will shape both how interactions are built and what expressive capabilities are possible, translating cutting-edge research into robust, real-world systems.

Senior Software Engineer (Robotics) 🤖 London (On-site, 5 days/week) Permanent role with excellent on-site benefits We’re looking for a Senior Software Engineer to help turn our advanced robotics stack into a dependable, real-world product. This is a hands-on role where you’ll write production code, integrate subsystems, and work directly with robots in both simulation and hardware environments...

You will technically lead ATE projects from concept to deployment, mentoring junior engineers and collaborating with cross-functional teams in hardware, firmware, and manufacturing to enhance product test coverage, throughput, and diagnostic accuracy. Key Responsibilities:

You will support in reverse engineering and deep understanding of vulnerabilities, including impact analysis and automation.

You must relish the challenge of findings critical vulnerabilities in complex software binaries through automation and manual practices. Creativity is highly valued; being able to find novel vulnerabilities is essential in this role.

As a Senior Hardware /Principal Engineer, you will be working as part of a multidisciplinary team to formulate and optimise innovative hardware engineering solutions, for products such as Helmet Mounted & Head-Up Displays, Mission Computers, Flight Controls, Active Inceptors and other associated safety-critical technology. This role will provide you with the opportunity to work with leading,...