Due to progression, this role exists to replace a senior engineer within a well-established software company operating in the highly regulated energy sector.Senior Python Software Engineer Circa 56,000 + up to 15% bonus Hybrid (2 days per month onsite, Southampton)The software you''ll work on is business critical. It must be reliable, auditable, and able to stand up to regulatory scrutiny. That shapes how engineering is done here: considered design, well-tested code, and a focus on doing things properly rather than quickly. If you''re a Python engineer ready to take on more responsibility, mentor others, and work in an environment where engineering discipline matters, this role is designed for you.What you''ll be working on You''ll join a software-led organisation, contributing to the design, development, and ongoing improvement of commercial systems used within a regulated energy environment. Your work will include:Building and maintaining Python-based services and applicationsWriting clear, well-tested, and maintainable codeContributing to design decisions and agreed technical standardsReviewing code and helping raise engineering quality across the teamSupporting reliable releases in a cloud-hosted environment You''ll report directly to a Principal Software Engineer and work alongside experienced engineers who value clarity, quality, and pragmatic problem-solving.What "senior" means here This is not a people-management role. Seniority is demonstrated through:Sound technica