Principal software engineer - python

Salary: £52,000 - 92,000 per year Requirements: We are looking for a Principal Software Engineer with deep experience in Python, AWS, and modern development practices. You have previously guided technical direction, steered architectural decisions, and raised engineering standards. You are comfortable working in Agile environments and understand how Scrum supports both structure and flexibility. You can solve complex problems and communicate clearly with both engineers and non-technical stakeholders. You are willing to mentor and coach other engineers and support their growth. Experience with Python software engineering, AWS, Terraform, Jira, GitHub, CI/CD pipelines, Azure APIM, REST APIs, microservices, Grafana, and event-driven architecture is relevant. You may be required to pass an enhanced security vetting process. You must be able to work in a hybrid setup within commutable distance of Chandlers Ford or Oxford. You must not require sponsorship for this role. Responsibilities: We design and develop systems using Python, AWS, and MariaDB to meet fast-moving business needs. We make key architectural decisions and drive technical strategy for a platform used across the organisation. We coach and mentor engineers to build a culture where innovation and quality are central. We contribute to the engineering evolution of our platform. We may step into leadership as our product team grows and guide the next generation of engineering talent. We may participate in on-call support on a rota basis, including 24/7 coverage. Technologies: AWS Azure CI/CD GitHub Grafana Support JIRA MariaDB Python REST Security Terraform microservices Cloud Copilot Office 365 More: We are a leading UK technology company delivering transformative, data-driven solutions for the energy sector and beyond. With two decades of experience, we help organisations unlock the power of smart data to improve efficiency, reduce cost to serve, and enhance customer experience. Our platforms and energy data management solutions support millions of households and major industry partners in building a smarter, more sustainable future. The role is hybrid, based within commutable distance of either Chandlers Ford or Oxford, and includes day-one benefits such as a bonus scheme, 25 days annual leave plus bank holidays, pension contributions, onsite gym access at our Chandlers Ford office, an EV car scheme, healthcare support, death in service cover, an Employee Assistance Programme, and a paid volunteering day each year. We are committed to diversity, inclusion, and helping our people be their authentic selves. last updated 24 week of 2026