Python Developer - SC Cleared

CBS Butler; Rowberrow; Hybrid; GBP 103,000 - 110,000; Full time

Job summary

CBS Butler is seeking a Senior Python Developer with active SC clearance for a 12-month project. The role focuses on high-performance, low-latency systems and near real-time processing using Kubernetes and containerised services.

The candidate should have extensive Python development experience, strong knowledge of concurrency, and hands-on experience with modern web frameworks. Hybrid UK-based work with a mix of onsite and remote days is offered.

Qualifications

• 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.

Skills

Python development

performance tuning

low-latency systems

root-cause analysis

event-driven architectures

API development

Kubernetes

Docker

concurrency and asyncio

software architecture

CI/CD and Git

Tools

Kubernetes

Docker

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