To our valued Leidos candidates:

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Job #: R-00088877-OTHLOC-PL-2D1586
Location: London, POST-LON
Category: Software Engineering
Schedule (FT/PT): Full Time
Travel Required: Yes, 100% of the time
Shift: Day
Potential for Telework: Yes, 100%
Clearance Required: UK - BPSS


Job Description:

Everything we do is built on a commitment to do the right thing for our customers, our people and our community. Our mission and our values guide the way we do business. The foundation of our Leidos culture is our Values, Beliefs and Expectations by which we select, recognise and reward employees. They create the environment that drives us toward our mission.

Inspired to make a difference, we are committed to solving the world’s toughest problems.

Passionate about customer success by being determined to understand and respond to our customers’ needs as if they were our own.

United as a team, we are bound together by our conviction that ethics and integrity is core to how we operate.

PRINCIPAL Cyber Security architect

Job Description:

.NET Engineers and Developers work on a range of projects for different customers, with durations ranging from a few weeks to over a year. It’s a team-based, full software lifecycle role, including requirements capture, design, development, testing and deployment.

Main Responsibilities

  • Requirements capture and document requirements of development tasks through designing mock-ups and writing use case documents

  • Complete development tasks on time and at the acceptable standard of quality with less or no support from other team members

  • Provide assistance to other members of the team when required

  • Investigation and provide resolution of bugs and issues

  • Perform Factory Acceptance Testing (FAT) on other team members’ development tasks

  • For any assigned helpdesk tickets, investigate and provide responses in a timely manner

  • Participation in programme team meetings

  • If asked by Team Lead:

    • Perform code review on team members’ changes and provide feedback

    • Attend customer meeting or workshops

    • Resolve Penetration Tests issues

    • Perform releases using standard deployment tools and processes

  • If opportunity arises:

    • Deliver a significant functional area to any system from leading the workshop through to delivery to customers

    • Mentor junior developers/apprentices

    • Lead a sub-team on the delivery of a significant functional area


Server-side Development

  • C#



Client-side Development

  • JavaScript frameworks, typically jQuery, VueJS


  • SQL Server

Unit Testing

  • Unit testing frameworks, typically NUnit, RhinoMocks, Sinon, Mocha

Full Stack Testing

  • Selenium

Object Relationship Mappings (ORMs)

  • NHibernate

  • Fluent NHibernate

Source Control

  • Git



  • Good understanding of Object Oriented Programming and its underlying principles

  • Effective experience of working within an Agile Team, and with concepts including the following and the tools that support them:

    • Continuous Integration (CI)

    • Continuous Development (CD)

    • Test Driven Development (TDD)

  • Strong focus on quality and a structured approach to software development, incorporating concepts such as:

    • Documentation

    • Code Reviews

    • Code Refactoring

    • Unit Testing

  • Good communication, teamwork and willingness to learn


  • Front end application state including Vuex;

  • Front end tools including Webpack and NPM;

  • Experience working on BitBucket, Bamboo and Octopus Deploy;

  • Experience working on AWS cloud platform.

What do we do for you?:
At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. 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. Our reward scheme includes:
•    Contributory Pension Scheme
•    33 days Annual Leave (including public and privilege holidays)
•    Access to Flexible benefits (including life assurance, health schemes, and cycle to work scheme)

•    Dynamic 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.

This position is a Remote opportunity.

Pay Range:

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.


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