Principal Python Developers

Principal Python Developer // Derby (Onsite ) // £70,000 - £80,000If youre looking for a Principal-level engineering role where you can drive real technical change while working on critical energy systems, keep reading! In this role youll still be building, but youll also be making architecture decisions, coaching engineers, and guiding delivery standards across a growing digital capability. The focus is on backend Python systems that underpin the UKs transition to sustainable, low-carbon energy.

From secure APIs and cloud deployments to DevOps pipelines and data management, youll be responsible for ensuring high standards, modern engineering practices, and long-term scalability. What youll be doing:Driving technical direction across backend Python services (Django/Flask)Shaping cloud infrastructure on AWS, Azure or GCP using Terraform and KubernetesMentoring a cross-functional team of developers and engineers

Working closely with product, DevOps, and senior stakeholders to align delivery

Ensuring systems are secure, resilient, scalable and built with long-term maintainability in mind

Who theyre looking for:Strong experience designing and building Python APIs in enterprise environments

Comfortable with system architecture, DevOps tooling and infrastructure-as-code

Cloud experience with AWS, Azure or GCP (preferably more than one)Someone whos led teams or coached engineers, but still gets stuck into code

Well-versed in Agile and CI/CD delivery - Git, automated testing, deployment pipelines

Must be a sole UK national - SC clearance required

Desirable extras:Experience with high-assurance or safety-critical software

Exposure to GDS digital service standards

Familiarity with big data, ETL, or ML/AI pipelines

Background in energy, defence, embedded or industrial software a bonus

Why this role?Youll have real influence on how key infrastructure software is built and delivered

The engineering culture is moving towards high trust, DevOps-first, cloud-native

Youll be working with experienced developers, architects, and delivery leads

Long-term investment in your growth with clear routes into Head of Engineering or Enterprise Architecture roles

Benefits:£70,000 to £80,000 basic salary

Full-time onsite in Derby (due to project security and collaboration)Enhanced pension and private medical

Annual holiday bonuses and a vibrant Employee CommitteeHuge investment in training, leadership coaching, and internal promotion

Work that directly supports the UKs clean energy and net-zero goals

For more information please apply now or contact job poster directly.*Sole UK Nationals only*

Information :

• Company : Xpertise Recruitment
• Position : Principal Python Developers
• Location : Derbyshire, England
• Country : GB