Python Developer - SC Cleared

CBSbutler; West of England; Hybrid; GBP 103,000 - 110,000; Full time

Job summary

CBSbutler is seeking a Senior Python Developer for a major Bristol project. Work on high-performance, near real-time systems using Kubernetes, Docker, and event-driven architectures. This 12-month contract requires active SC clearance with 1 day onsite per week and 4 days remote.

The role demands 10+ years of Python experience, strong low-latency and profiling skills, concurrency mastery, and CI/CD in Agile environments. Inside IR35 rate £75-£80 per hour.

Qualifications

• 10+ years of professional Python development experience.
• Strong performance tuning, profiling and optimisation.
• Experience building low-latency, high-throughput systems.
• Excellent troubleshooting and root-cause analysis skills.
• Experience with event-driven architectures (Kafka, RabbitMQ, WebSockets).
• API development using FastAPI, Flask or Django.
• Hands‑on with Kubernetes and Docker.
• Knowledge of concurrency, asyncio, multiprocessing and threading.
• Solid software architecture and design skills.
• CI/CD pipelines, Git and Agile environments.

Skills

10+ years Python development

Performance tuning

Low-latency systems

Troubleshooting

Concurrency/asyncio

Software architecture

CI/CD/Agile

Tools

Kubernetes

Docker

Kafka

RabbitMQ

WebSockets

FastAPI/Flask/Django

Job description

Senior Python Developer | SC Cleared | Inside IR35

Location: Bristol - 1 day per week onsite, 4 days remote

Rate: £75-£80 per hour (Inside IR35)

Contract: 12 months

Clearance: Active SC Clearance required

We're looking for an experienced Senior Python Developer to join a major project on a 12-month contract.

This is an excellent opportunity for a highly skilled Python specialist with a strong background in performance optimisation, near real-time systems and Kubernetes.

Essential Skills & Experience:

• 10+ years of professional Python development experience
• Strong expertise in performance tuning, profiling and optimisation
• Experience developing low-latency, high-throughput systems
• Strong troubleshooting and root-cause analysis skills
• Experience with event-driven and streaming architectures (Kafka, RabbitMQ, WebSockets)
• API development using FastAPI, Flask or Django
• Hands‑on experience with Kubernetes and Docker
• Strong understanding of concurrency, asyncio, multiprocessing and threading
• Solid software architecture and design skills
• Experience with CI/CD pipelines, Git and Agile environments

Desirable Skills:

• AWS, Azure or GCP
• Managed Kubernetes (EKS, AKS, GKE)
• Performance optimisation using Cython, Rust or C extensions