Senior Python Developer

Senior Python Developer – (Performance Engineering) Bristol HQ -2 days a week onsite **Security clearance is essential** Up to £80 P/H Inside IR35 We are seeking an experienced Security cleared Senior Python Developer with strong Performance Engineering experience to join a technical team, developing and optimising high-performance, low-latency software solutions.

This role is ideally suited to a highly experienced Python developer with a strong background in performance engineering, distributed systems and containerised environments. You will take ownership of designing, building and maintaining production-grade Python services, ensuring applications deliver high throughput, scalability and near real-time performance.

You will play a key role in identifying performance bottlenecks, resolving complex technical issues and contributing to architectural decisions across a modern, distributed technology environment. Key Responsibilities Design, develop and maintain high-performance, low-latency Python services and APIs.

Profile and optimise application performance, focusing on CPU, memory and I/O utilisation, latency and throughput. Tune concurrency and parallel processing using asyncio, multiprocessing and threading. Diagnose and resolve complex technical issues across applications, infrastructure, distributed systems and Kubernetes workloads.

Lead root-cause analysis of production incidents and implement effective long-term solutions. Contribute to software architecture and design decisions, ensuring solutions are modular, scalable, maintainable and testable.

Develop event-driven and near real-time solutions using streaming and messaging technologies. Containerise applications using Docker and manage deployments, scaling, configuration and resource optimisation within Kubernetes. Develop and maintain REST and/or gRPC APIs.

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