Senior Python DeveloperLondon Contract Energy / Trading Environment£400-£425 per day (Inside IR35)We are supporting a leading organisation operating within the energy and commodities space who are looking to engage a Senior Python Developer to support the build-out of advanced data-driven applications and analytical tools.This is a hands-on engineering role working at the intersection of data, analytics and front-office stakeholders. You will be responsible for building clean, modular Python applications, manipulating complex datasets, and delivering interactive dashboards used for commercial insight.The RoleYou will: Develop robust, production-grade Python applicationsManipulate and analyse large datasets using pandas and numpyBuild interactive dashboards using Plotly DashDesign modular, reusable and well-tested codeIntegrate with REST APIs and backend servicesCollaborate with commercial and technical stakeholders to translate requirements into scalable solutionsThis is a highly technical role suited to someone who enjoys building clean systems rather than quick scripts. Required Experience Hands-on Python development experienceStrong object-oriented programming skillsDeep experience with pandas and numpy for data manipulationExperience with virtual environments, dependency management and packagingStrong understanding of software engineering best practices including Git, unit testing (pytest), documentation and code quality toolsExperience building data-driven applications i