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Senior Software Engineer (Python)

Whiteley, United Kingdom

Job ID IMS20220702-76611
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Our team in the UK has an unwavering focus on our commitment to excellence in everything we do, delivering mission solutions with speed, innovation and flawless execution.

  • Full Time
  • Level: Experienced
  • Location: On Site
  • Glassdoor Reviews and Company Rating

Success Profile

What makes a successful team member at L3Harris?
Check out the traits we’re looking for and see if you have the right mix.

  • Collaborative
  • Detail-Oriented
  • Influential
  • Organised
  • Strategic
  • Technical


A dynamic market environment combined with pioneering technology and a collaborative team, makes every day interesting and engaging.

Thomas, Program Finance Manager, Crawley, UK

L3Harris Work Perks

  • Health

    • Private medical insurance and group life assurance
    • Benefit allowance to help you pay for insurance
    • Options for dental and critical illness coverage as well as a health cash plan and gym membership

  • Family

    • Employee and Family discount programme
    • Employee Assistance Programme
    • Optional partner life assurance

  • Well-Being

    • Generous annual holiday allowance
    • Retirement savings plan with employer contribution
    • Employee assistance programme to provide advice and guidance on finance, mental health, and more
    • Casual “dress for your day” policy

Job Description

L3Harris is dedicated to recruiting and developing diverse, high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris Technologies is an agile global aerospace and defense technology innovator, delivering end-to-end solutions that meet customers’ mission-critical needs. The company provides advanced defense and commercial technologies across space, air, land, sea and cyber domains. L3Harris has approximately $18 billion in annual revenue and 47,000 employees, with customers in more than 100 countries.


Job Title: Senior Software Engineer (Python)

Job Location: UK – Whiteley - Hampshire

Job ID: IMS20220702-76611

About the role:

L3Harris Flight Data Services are looking for a Senior Software Developer to join our team based in Whiteley. We provide an outsourced Flight Data Monitoring service to aircraft operators worldwide. As a Senior Software Developer, you will coach and mentor team members, undertake software development tasks, prioritise tasks in line with our strategy, and deliver safety solutions on-time to our customers.

We’re looking for an experienced developer that fosters innovation while working in a high performance agile team that delivers value. You will communicate and work closely with team members ensuring code quality, design fidelity and expertise is shared.

We have investment-backed projects to develop new safety services for our pilot training products. This includes deploying our additional cloud based capabilities as part of a Big Data platform.

Day to day responsibilities will include (but not limited to):

  • Lead and mentor team members
  • Encourage and motivate people to achieve high standards and meet our strategic objectives by actively developing team members’ skills and knowledge and providing constructive feedback
  • Interface with key clients that have software development requirements
  • Design, test and develop new features from internal and external customer requests, including acceptance criteria and constraints in accordance to the software development style and quality guidelines
  • Maintain and improve internal and external software systems and applications
  • Write unit tests to identify defects
  • Participate in code review of own and other developer’s code in accordance with code review guidelines.
  • Manage own and the teams’ workload of jobs using JIRA task management tools
  • Apply agile software development and test driven development methods to software development activities
  • Provide internal and external training of internally developed software systems
  • Ensure software releases are to plan, achieve acceptable quality, and follow the release procedures
  • Maintain quality processes and technical product documentation

Knowledge, Skills and Qualifications:

  • A mature, proactive and responsible approach to work, with initiative and problem-solving capability
  • Excellent communication skills, both written and oral
  • Python programming- at least 3 years of commercial experience is a must
  • Expertise in at least one Python framework, such as Django or Flask
  • Use of Python libraries such as NumPy and Pandas would be beneficial
  • Familiarity with front-end technologies such as JavaScript, jQuery, HTML and CSS
  • An understanding of databases and SQL
  • Experience with cloud technologies would be beneficial
  • Use of Git or similar version control systems
  • Working within Docker / Kubernetes environments
  • Degree in a relevant field or equivalent relevant experience

Technologies used:

  • Python / NumPy / Pandas / C
  • Django / Flask / Celery / RabbitMQ
  • JavaScript / React
  • Linux / Docker / Kubernetes
  • AWS & Azure


  • Auto Enrolment pension scheme
  • 25 days annual leave plus bank holidays
  • Group Income Protection, Private Health Care and Life Assurance
  • Employee Assistance Programme
  • Discounts with cinemas, travel, major retailers, family days out and much more
  • Hybrid working opportunities
  • Free parking
  • Cycle to Work scheme

Please note: L3Harris Commercial Aviation does not provide a visa sponsorship for this role. All candidates who wish to apply for this vacancy must have the right to work in the UK in order to be considered.

Note: This Job Description is not intended to be all inclusive. It is designed to indicate the general nature and level of work performed by employees within this job title. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications required of employees assigned to the role. The employee may perform other related duties as required to meet the ongoing needs of the organization.

L3Harris Technologies is proud to be an Affirmative Action/Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, colour, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws

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