Python Software Engineer – Gloucester – NSW

BAE Systems; Gloucester; Hybrid; GBP 45,000 - 65,000; Full time

Job summary

A leading defense technology firm is seeking a Python Software Engineer to develop software solutions for national security clients in Gloucester. The role involves designing and coding solutions, mentoring junior developers, and working within a collaborative hybrid environment. Applicants must have a strong background in Python and familiarity with cloud infrastructures.

Benefits

Hybrid working arrangements

Community engagement opportunities

Qualifications

• Advanced Python programming experience required.
• Familiarity with cloud infrastructures like AWS is a plus.
• Experience with various testing frameworks desired.

Responsibilities

• Design, code, test, and document software programs.
• Provide accurate development effort estimates.
• Mentor junior developers and address code defects.

Skills

Advanced Python: OOP, async

Environment management: virtualenv

Testing: pytest

Concurrency & parallelism

Algorithms, data structures

Linux/UNIX fluency

Experience interfacing with C/C++ APIs

Strong Git skills

Atlassian Tools/GitHub familiarity

High-assurance mindset

Job description

Overview

Location(s): UK, Europe & Africa : UK : Gloucester

BAE Systems Digital Intelligence is home to 4,500 digital, cyber and intelligence experts. We work collaboratively across 10 countries to collect, connect and understand complex data, so that governments, nation states, armed forces and commercial businesses can unlock digital advantage in the most demanding environments.

Job Title: Python Software Engineer

Requisition ID: 122278

Location: Gloucester - We offer a range of hybrid and flexible working arrangements - please speak to your recruiter about the options for this particular role.

About the role

The National Security business in Gloucester is growing and there are an increasing number of opportunities to work with a range of National Security clients to provide solutions that have a real impact.

Be part of a growing team that not only delivers for its clients but also gives back to the community with plenty of opportunities to get involved with local community engagement and outreach activities to help build tech and cyber skills in the region.

We are looking for additional Python Software Engineers to join our team following continuous growth and success in the UK Government sector.

What you could be doing for us

• Designing, coding, testing, correcting and documenting simple programs, and assisting in the implementation of software which forms part of a properly engineered information or communications system
• Providing accurate estimates of development effort needed to design, code and test software from given specifications
• A focus towards Data Processing
• Working on AWS Cloud infrastructure
• Opportunities to mentor junior level developers, providing oversight where applicable
• Logically analysing code defects and producing timely code fixes

What background are we looking for?

• Advanced Python: OOP, async (asyncio), pythonic/idiomatic code, design patterns.
• Environment management: virtualenv, pip, Poetry/uv; reproducible builds.
• Testing: pytest, unittest.mock, BDD (behave), JSON/jsonschema.
• Concurrency & parallelism: threading, multiprocessing, async I/O.
• Algorithms, data structures, profiling & optimisation.
• Linux/UNIX fluency; POSIX APIs, sockets, binary parsing.
• Experience interfacing with C/C++ APIs; basic C++ concepts.
• Strong Git skills (Git Flow), CI/CD pipelines, code quality tools.
• Atlassian Tools/GitHub familiarity.
• High-assurance mindset; awareness of risk in secure coding.

Security Clearance

Due to the nature of our work successful candidates for this role will be required to go through Government SC clearance prior to starting with us. https://www.gov.uk/guidance/security-vetting-and-clearance

Why BAE Systems?

This is a place where you’ll be able to make a real difference. You’ll be part of an inclusive culture that values diversity of thought, rewards integrity, and merit, and where you’ll be empowered to fulfil your potential. We welcome people from all backgrounds and want to make sure that our recruitment processes are as inclusive as possible. If you have a disability or health condition (for example dyslexia, autism, an anxiety disorder etc.) that may affect your performance in certain assessment types, please speak to your recruiter about potential reasonable adjustments. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks.

Life at BAE Systems Digital Intelligence

We are embracing Hybrid Working. This means you and your colleagues may be working in different locations, such as from home, another BAE Systems office or client site, some or all of the time, and work might be going on at different times of the day.

By embracing technology, we can interact, collaborate and create together, even when we’re working remotely from one another. Hybrid Working allows for increased flexibility in when and where we work, helping us to balance our work and personal life more effectively, and enhance well-being.

Diversity and inclusion are integral to the success of BAE Systems Digital Intelligence. We are proud to have an organisational culture where employees with varying perspectives, skills, life experiences and backgrounds - the best and brightest minds - can work together to achieve excellence and realise individual and organisational potential.

Division overview: Capabilities

At BAE Systems Digital Intelligence, we pride ourselves in being a leader in the cyber defence industry, and Capabilities is the engine that keeps the business moving forward. It is the largest area of Digital Intelligence, containing our Engineering, Consulting and Project Management teams that design and implement the defence solutions and digital transformation projects that make us a globally recognised brand in both the public and private sector.

As a member of the Capabilities team, you will be creating and managing the solutions that earn us our place in an ever changing digital world. We all have a role to play in defending our clients, and this is yours.

When applying for this role you will be redirected to BAE systems careers site where you will be required to:

• Register an account (this is optional, you can apply as a guest)
• Provide contact information
• Upload your cv
• Complete a short diversity & inclusion questionnaire

When asked source type, please select "job board advertisement" then "the IET / E+T Jobs"