DV Cleared Software Engineer

IO Associates; Portsmouth; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

IO Associates is seeking a Senior Software Engineer for a permanent, full-time role based in Portsmouth, UK, with three days per week onsite. The position requires active MoD DV clearance and offers a salary in the £70,000–£90,000 range.

You will help maintain, improve, and modernise complex software systems within a secure environment, contributing to architecture decisions and engineering excellence.

Qualifications

• Active DV clearance required for the role.
• Strong software engineering experience in Python or C/C++ development.
• Proven ability to lead technical investigations and deliver sustainable solutions.

Responsibilities

• Support the maintenance, enhancement, and modernisation of complex software systems in a secure environment.

Skills

Python

C/C++

Software architecture

System integration

Mentoring engineers

Technical leadership

Tools

Security

Job description

Salary: £90,000 - 90,000 per year

Requirements:

• Active DV clearance.
• Strong software engineering experience in Python or C/C++ development.
• Strong understanding of software architecture, system integration, and modern engineering practices.
• Proven ability to lead technical investigations, solve complex problems, and implement sustainable solutions.
• Experience mentoring engineers and driving high standards of software quality.

Responsibilities:

• Support the maintenance, enhancement, and modernisation of complex software systems within a secure environment.

Technologies:

• Support
• Python
• Security

More:

We are seeking an experienced Senior Software Engineer for a permanent, full-time role based in Portsmouth, UK, with 3 days per week onsite. This position requires active MoD DV clearance and offers a salary of £70,000 to £90,000. We are looking for someone to help maintain, improve, and modernise complex software systems in a secure environment.

last updated 40 week of 2026