Octopus Energy Group is seeking both Mid-Level and Senior Security Engineers to join their growing Cyber and Information Security team. This role offers an exciting opportunity to shape security practices in a Cloud-First organization that's making a significant impact in sustainable energy. The position involves building security tooling, responding to incidents, working with development teams, and implementing best practices. The ideal candidate will have 2-4+ years of experience (depending on level) with strong knowledge of web application security, cloud platforms (especially AWS), and various security tools. The company is ranked as UK's top workplace and offers a unique culture focused on autonomy and innovation. This is a hybrid role based in London, UK, offering competitive compensation and the chance to work on meaningful projects that contribute to a sustainable future. The role combines technical expertise with the opportunity to shape security culture and practices across a rapidly growing organization.