Software Engineer – Application Development

Leidos; West of England; On-site; GBP 48,000 - 61,000; Full time

Benefits offered by this job

Contributory Pension Scheme

Private Medical Insurance

33 days Annual Leave (incl. holidays)

Flexible benefits (life assurance, gym

Flexi Time Working

Job summary

Leidos UK & EUROPE is seeking a Software Engineer – Application Development in Bristol on customer site. You will develop Python applications, build UI components with Vue/Electron, and work with GitLab CI/CD while observing secure coding practices in a mission-focused environment.

You’ll learn infrastructure as code (Ansible, Terraform/Terragrunt) and collaborate with teams to deploy and support applications, databases like MongoDB and messaging systems such as RabbitMQ.

Qualifications

• Experience with Python or another programming language and a willingness to develop strong Python skills.
• Understanding of software development basics: source control, testing, debugging and documentation.
• Interest in web or desktop app development using Vue or Electron.
• Awareness of APIs, data handling, Linux environments, automation or deployment concepts.
• Willingness to learn secure coding practice and follow industry development standards.
• Ability to work with peers, take feedback and communicate with stakeholders.
• Exposure to GitLab, CI/CD pipelines, deployment automation or infrastructure as code (Desirable).
• Experience with MongoDB, Elasticsearch, Redis, RabbitMQ or similar tech (Desirable).
• Experience with Linux or MacOS for development or troubleshooting (Desirable).
• Interest in cyber security and secure software development (Desirable).

Responsibilities

• Contribute to the development of application features, fixes, tests and documentation.
• Write and maintain Python code with guidance from senior engineers.
• Build user interfaces and desktop/web components using Vue and Electron.
• Use Git and GitLab CI/CD pipelines to build, test and deliver changes.
• Learn infrastructure as code concepts with Ansible and Terraform/Terragrunt.
• Support integration with data and messaging technologies like MongoDB, Elasticsearch, Redis and RabbitMQ.
• Follow secure coding guidance and peer review processes.
• Assist with testing, troubleshooting, deployment prep and controlled environment support.
• Occasionally assist with hardware installation or configuration as needed.
• Collaborate with senior developers, users and project teams to deliver useful software.

Skills

Python

Web/desktop development

APIs

Linux environments

Automation

Git

Tools

GitLab CI/CD

MongoDB

Elasticsearch

Redis

RabbitMQ

Ansible

Terraform/Terragrunt

Job description

Software Engineer – Application Development Location: Bristol, 4-5 days per week on customer site Clearance: Must be eligible for DV clearance. We are looking for a Software Engineer Application Developer who is keen to build practical software skills in a secure, mission-focused environment. This role is ideal for someone with a good technical foundation, curiosity, and the motivation to learn from experienced engineers while contributing to real operational systems. You will gain hands- on experience with Python, Vue, Electron, GitLab CI/CD, Ansible, Terraform/Terragrunt, and supporting technologies such as MongoDB, Elasticsearch, Redis and RabbitMQ. You will also learn good secure coding practice and how software is built, deployed and supported in controlled environments, with occasional opportunities to assist with hardware installation or configuration.

What You’ll Do

• Contribute to the development of application features, fixes, tests and supporting documentation.
• Write and maintain Python code with guidance from senior engineers.
• Help build user interfaces and desktop/web application components using Vue and Electron.
• Use Git and GitLab CI/CD pipelines to build, test and deliver software changes.
• Learn how infrastructure as code is used through tools such as Ansible and Terraform/Terragrunt.
• Support integration with data and messaging technologies including MongoDB, Elasticsearch, Redis and RabbitMQ.
• Follow secure coding guidance, peer review processes and good development practice.
• Assist with testing, troubleshooting, deployment preparation and controlled environment support.
• Occasionally assist with installation, configuration or checking of hardware where required.
• Work closely with senior developers, users and project teams to understand requirements and deliver useful software.

What You’ll Bring

Essential:

• Experience with Python or another programming language and a willingness to develop strong Python skills.
• Understanding of software development basics, such as source control, testing, debugging and documentation.
• Interest in web or desktop application development, including frameworks such as Vue or Electron.
• Awareness of APIs, data handling, Linux environments, automation or deployment concepts.
• Willingness to learn secure coding practice and follow good industry development standards.
• Ability to work carefully, ask questions, take feedback and learn through peer review.
• Good communication skills and the confidence to work with technical and non-technical stakeholders.

Desirable:

• Exposure to GitLab, CI/CD pipelines, deployment automation or infrastructure as code.
• Exposure to MongoDB, Elasticsearch, Redis, RabbitMQ or similar technologies.
• Experience using Linux or MacOS for development or troubleshooting.
• Interest in cyber security, secure software development or working in secure environments.
• Any practical experience with hardware setup, configuration or technical support.

Clearance Requirements

Clearance to Start: SC Clearance for Role DV

We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance. We provide an employment package that attracts, develops and retains only the best in talent.

What we do for you

• Contributory Pension Scheme
• Private Medical Insurance
• 33 days Annual Leave (including public and privilege holidays)
• Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)
• Flexi Time Working

Commitment to Diversity

We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages, please let us know, and we will respond in a way that best fits your needs.

Who We Are

Leidos UK & EUROPE – we work to make the world safer, healthier, and more efficient through technology, engineering and science. Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation.

What Makes Us Different:

Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change. Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours. People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and a career development plans that enhance your future. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 - and moving faster than anyone else dares.

Original Posting: For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: £47,600.00-£61,000.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

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