Python Developer

Python Developer — Secure, Mission‐Critical Systems

Defence & Security | Remote | Contract | Outside IR35

Build software that’s actually used — and actually matters.

We’re looking for a Python Developer to work on secure, mission‐critical systems used across Defence & Security programmes. This is real production software, not prototypes or proof‐of‐concepts — built with care, discipline, and purpose.

What you’ll do

• Build clean, reliable Python services in a secure environment
• Write well‐tested, maintainable code (pytest, CI/CD)
• Work from clear requirements and sound architecture
• Collaborate with experienced Senior and Lead Engineers
• Ship software that supports real‐world operations

Tech & environment

• Python / pytest
• Automated testing & CI/CD pipelines
• Modern service‐based architectures and APIs
• Calm, professional engineering culture

What we’re looking for

• Solid experience building production software
• Strong Python fundamentals and good engineering habits
• A quality‐first mindset
• Eligibility for UK Security Clearance (SC)

Why this role

• Meaningful, high‐integrity work
• Strong technical leadership
• Modern engineering standards — no cowboy coding
• Hybrid working, Bristol based
• Outside IR35 contract

If you’re a Python Developer who cares about doing things properly, this is a project worth your time.