The salary of a software developer starts at around £21,000 and can increase to £64,000 with experience. The national average, however, hovers at around the same amount as the website developer salary, which is £31,000. Both professions are tightly connected and equally lucrative. However, web developers can sometimes earn more, particularly in London. For instance, senior software developers in the capital earn £55,000, while some senior developers in London earn up to £75,000.