Junior Application Software Developer

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. They are seeking a Junior Application Software Developer to contribute to the development of web applications and service-based tools used in operational environments, working closely with senior engineers and cross-functional teams.

Responsibilities

• Contribute to development of web applications, APIs, and service-based tools used in operational environments
• Write and maintain code primarily in Python (and C++ where performance or legacy components require it)
• Support UI and backend implementation (e.g., web UIs, REST APIs, data processing services)
• Build automation and data-processing utilities to streamline workflows
• Participate in testing, debugging, and quality activities with coaching
• Help refine requirements and implement features within a cross-functional team
• Contribute to documentation and follow traceable, peer-reviewed Git practices aligned with governance policies

Skills

• Must be eligible and willing to undergo DV clearance (British Citizen, UK residency last 10 years)
• Hands-on software development experience (academic, hobbyist, internship, or professional)
• Working knowledge of Python (and/or C++ or another modern language)
• Understanding of core engineering practices: modularity, testing basics, version control
• Familiarity with Linux and/or Windows development environments
• Curiosity, strong problem solving, and ability to take feedback constructively
• Degree in Computer Science / Software Engineering (or equivalent experience)
• Exposure to web frameworks (e.g., FastAPI, Flask, Django) and REST APIs
• Basic frontend awareness (HTML/CSS/JavaScript, or a framework such as React/Vue)
• Secure coding awareness (input validation, secrets handling, logging hygiene)
• Experience with containers (Docker) or CI basics
• Professional membership (BCS, IET) is a plus

Benefits

• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

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