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.
- Write unit and integration tests and contribute to CI/CD pipelines and continuous improvement.
Essential Skills & Experience
- Security cleared (SC) currently, this is a non-negotiable requirement
- Extensive Python development experience, with a proven track record of delivering clean, maintainable, production-grade code.
- Extensive experience in performance tuning and optimisation of Python applications.
- Strong understanding of concurrency, parallelism, memory management and the Global Interpreter Lock (GIL).
- Experience profiling CPU, memory and I/O performance and optimising application latency and throughput.
- Strong troubleshooting and debugging skills across codebases, infrastructure and distributed systems.
- Solid software design and architectural experience, with an understanding of scalable and testable design patterns.
- Experience developing near real-time, event-driven or streaming architectures.