Software Integration Engineer

Job Title – Software Integration Engineer

Job Location – Portchester, UKJob  – 40586

About this opportunity and L3

Harris UK Operating at 11 sites in the United Kingdom, L3

Harris supports Britain's mission to secure and strengthen the country by delivering sovereign innovation across the space, air, land, sea and cyber domains. L3

Harris in Portchester are part of our Maritime UK business - a leading global supplier of integrated marine control systems and simulation products for warships, submarines and high-end commercial marine vessels worldwide. Our Maritime UK business has four UK location and together we are powering the Royal Navy’s adoption of autonomous surface vehicle technology as well as delivering autonomous capability to UK ports, harbours and offshore energy service providers.

We are seeking a Software Integration Engineer to join our Maritime engineering team, supporting the delivery of advanced industrial and maritime technology solutions across customer programmes, Internal Research and Development (IRAD) initiatives, and Business Development (BID) activities.

This role offers the opportunity to work at the interface between software, control systems, and operational technology, contributing to the integration, testing, validation, and commissioning of complex systems used in mission-critical environments. The successful candidate will collaborate with multidisciplinary engineering teams to develop and integrate software applications, programmable logic controller (PLC) systems, smart power management solutions, and maritime communication interfaces.

The position supports a diverse portfolio of projects ranging from concept development and prototyping through to customer delivery and operational deployment. The role is ideally suited to an engineer who enjoys solving integration challenges, working across multiple technologies, and contributing to innovative solutions within the maritime and industrial sectors.

As part of a growing engineering team, the Software Integration Engineer will play an important role in strengthening the organisation’s integration capability, supporting knowledge transfer, and ensuring the successful delivery of future programmes.

A few of our employee benefits are:

Hybrid working where possible, three days onsite per week

Half day finish on a Friday
25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days Private medical insurance with optional family cover

Pension scheme of up to 8% employer contribution

Life Assurance 4x salary (flexible up to 10x) Group income protection

Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover, cycle to work scheme, travel insurance and electric car scheme

Employee Family Assistance Program providing mental health and wellbeing support Professional membership reimbursement (discretionary) What the role will involve

The responsibilities of your role will include the following:

Design, develop, integrate, and maintain software solutions for industrial control and maritime systems.

Develop and support interfaces between programmable logic controllers (PLCs), power management systems, communication systems, and higher-level software applications.

Perform software integration, verification, validation, troubleshooting, and system testing activities throughout the project lifecycle.

Support laboratory integration, factory acceptance testing, harbour trials, sea trials, commissioning, and customer acceptance activities.

Collaborate with multidisciplinary engineering teams including software, systems, hardware, electrical, and test engineers to deliver integrated solutions.

Support Internal Research and Development (IRAD) initiatives, technology demonstrations, and Business Development (BID) activities through technical investigations, prototyping, and proof-of-concept development.

Produce and maintain technical documentation, integration procedures, test specifications, and engineering records in accordance with company processes and industry standards.

Investigate and resolve software, interface, and system-level…