Junior Application Software Developer

Company: Leidos
Apply for the Junior Application Software Developer
Location: Bristol
Job Description:

Junior Software Engineer (Application Development)

Location: Commutable to Herefordshire, Cheltenham, and Bristol — mostly on‑site (4 days/week on customer site, 1 day remote where appropriate)

Clearance: Must be eligible and willing to undergo DV clearance (British Citizen, UK residency last 10 years)

Are you starting your software engineering career and excited to build applications that solve real operational problems? Want to work closely with users and see direct impact from what you ship?

You’ll join a National Security & Defence delivery team building primarily web and service‑based applications (with some desktop tooling where needed). This is a junior role: you’ll contribute under the guidance of senior engineers with strong peer review and support.

What You’ll Do

  • 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.

What You’ll Bring

Essential:

  • 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.

Desirable:

  • 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.

Education & Qualifications

  • Degree in Computer Science / Software Engineering (or equivalent experience).
  • Professional membership (BCS, IET) is a plus.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law.

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Posted: April 17th, 2026