Senior Security Engineer – API & Agentic AI Security

Employment Type --------------- Permanent Closing Date ------------ 2 Aug 2026 11:59pm Job Title --------- Senior Security Engineer – API & Agentic AI Security **Job Summary** Job Description --------------- **Who We Are** We're an iconic Aussie brand with a global footprint. Our purpose is to build a connected future so everyone can thrive. We're all about providing the best experience and delivering the best tech on the best network. This includes making Telstra the place you want to work. For you, that means a having career that grows with you and working with a team powered by human connection that prioritises wellbeing and choice. **Focus of the Role** **Help shape the future of API and AI security at Telstra — in a team where technical curiosity, collaboration and different perspectives are valued.** At Telstra, we’re building the next generation of API and Agentic AI security capability — and we’re looking for a Senior Security Engineer to help shape it. If you have strong technical foundations, enjoy solving complex problems and are keen to keep growing in a fast-evolving area of cyber security, we’d love to hear from you. This is a **hands-on** engineering role for someone who enjoys building, integrating, automating and improving security platforms — and who wants to do that in a supportive environment where we value curiosity, practical engineering, collaboration, automation and continuous improvement. **What We Offer** At Telstra, you’ll have access to a range of benefits, including: * Work-life integration — flexibility around where and when you work. * Toolkit provided (laptop + mobile phone + plan paid for) * Professional development programs. * Purchased Annual Leave scheme. * 16 weeks paid parental leave for primary and secondary carers. * Discounted Telstra products and services. **What You’ll Do** Global Networks & Technology - Security & Operations is responsible for Telstra's security and operations, protecting Telstra's assets and infrastructure. This is not a traditional security operations role. You’ll go beyond triaging alerts and maintaining the status quo. You’ll ask better questions, automate repetitive work and help build a scalable, resilient security capability that’s ready for what comes next. Using Cequence, you’ll work with security, architecture, platform, application and product teams to improve how Telstra discovers, understands and protects the APIs behind critical services used by millions of Australians. As a Senior Security Engineer – API & Agentic AI Security, you’ll help design, implement and continuously improve Telstra’s API security capability. **What you’ll bring** You don’t need to have worked with Cequence before. We can teach the platform. What matters most is that you’re a strong engineer who is curious, practical and excited by the future of API and AI security. You may come from security, software engineering, cloud, platform, DevSecOps, application security or a related technical background. You’ll likely be a great fit if you have experience or capability across some of the following areas — we don’t expect you to tick every box: * **Security engineering and architecture** * **API, cloud and application technologies** * **Automation and DevSecOps** If you’re curious, technically strong and interested in API security, automation and the future of AI-enabled cyber security, we’d love to hear from you — even if your experience doesn’t match every part of the role description. Experience with Cequence would be fantastic, but it is not essential. If you’ve built skills in API gateways, application security, cloud engineering, DevSecOps, software engineering, security automation, WAAP, bot mitigation or adjacent cyber security technologies — and you’re ready to deepen your expertise in one of the fastest-evolving areas of security — this could be the role for you. Come and help us build the future of API and Agentic AI security at Telstra. We're amongst the top 2% of companies globally in the CDP Global Climate Change Index 2023, being awarded an 'A' rating. If you want to work for a company that cares about sustainability, we want to hear from you. As part of your application with Telstra, you may receive communications from us on +61 440 135 548 (for job applications in Australia) and +1 (623) 400-7726 (for job applications in the Philippines and India). When you join our team, you become part of a welcoming and inclusive community where everyone is respected, valued and celebrated. We actively seek individuals from various backgrounds, ethnicities, genders and disabilities because we know that diversity not only strengthens our team but also enriches our work. We have zero tolerance for harassment of any kind, and we prioritise creating a workplace culture where everyone is safe and can thrive.  As part of the hiring process, all identified candidates will undergo a background check, and the results will play a role in the final decision regarding your application. We work flexibly at Telstra. Talk to us about what flexibility means to you. When you apply, you can share your pronouns and / or any reasonable adjustments needed to take part equitably during the recruitment process. We are aware of current limitations with our website accessibility and are working towards improving this. Should you experience any issues accessing information or the application form, and require this in an alternate format, please contact our Talent Acquisition team on [email protected] or via the additional contact options found at www.telstra.com.au/careers/diversity-equity-and-inclusion/disability-employment