Python Developer

Senior Python Developer London | 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 Role You will: • Develop robust, production-grade Python applications • Manipulate and analyse large datasets using pandas and numpy • Build interactive dashboards using Plotly Dash • Design modular, reusable and well-tested code • Integrate with REST APIs and backend services • Collaborate with commercial and technical stakeholders to translate requirements into scalable solutions • This is a highly technical role suited to someone who enjoys building clean systems rather than quick scripts. Required Experience • Hands-on Python development experience • Strong object-oriented programming skills • Deep experience with pandas and numpy for data manipulation • Experience with virtual environments, dependency management and packaging • Strong understanding of software engineering best practices including Git, unit testing (pytest), documentation and code quality tools • Experience building data-driven applications in a commercial environment.