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Senior Security Engineer - Penetration Testing

SEEK

Cremorne, Victoria, Australia Hybrid permanent

Posted: January 8, 2026

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Quick Summary

We are seeking a Senior Security Engineer - Penetration Testing to join our team in Cremorne, Victoria, Australia.

Job Description

About SEEK

At SEEK, we serve a noble purpose: to help people live more fulfilling and productive working lives and to help organisations succeed.

By joining us, you’ll be part of a multi-national technology business that is far-reaching with a start-up working culture that focuses on a set of collaborative values and appreciates dynamic cultures. SEEK is a place where potential meets possibility – it’s where your career aspiration and our purpose can make great things happen.

Why join us?

Be part of a multi-national tech company with strong core values to help us solve complex challenges for our customers while building a flexible, exciting career – one that could take you anywhere.

We’re looking for people who thrive in dynamic teams and enjoy tackling regular new challenges in a large-scale, modern, and agile environment. As one of Asia Pacific’s largest tech companies, you’ll contribute to multi-lingual systems, solving high-impact problems to the benefit of millions of people within the region.

Be part of a fast-growing company with a strong culture and clear purpose, innovation and strong investment in responsible AI. SEEK offers you the opportunity to be involved in impactful work and be part of a great team. Expect a great investment in your career development with access to workshops, conferences and courses while you work alongside seasoned experts.

About the role

As a Senior Security Engineer at SEEK, you'll be part of a fast-paced and supportive environment where you can make a real difference. You'll work on complex challenges that have a direct impact on people's lives, helping us evolve our business and reach new heights.

You will lead complex penetration testing engagements and provide mentorship to junior team members. Identifies advanced vulnerabilities and exploits them. Familiar with security concepts across networks, operating systems and applications. 

Reporting to the Head of Offensive Security you will be working closely with the other offensive security team members on a variety of projects and initiatives.

Responsibilities

• Manage full-scope testing projects, from planning to execution, reporting and presenting findings. 
• Conduct comprehensive iOS mobile application penetration testing.
• Perform advanced exploitation techniques. 
• Participate in red team exercises. 
• Streamline processes with automation tools where possible. 
• Contribute to a high-performing culture, where knowledge sharing and growing professionally with the team is encouraged. 
• Contribute to quality assurance and technical review on findings. 
• High-level proficiency in report writing, with ability to produce executive summaries. 
• Strong communication and stakeholder management skills to articulate complex concepts effectively to diverse audiences. 
• Identify novel attacks and vulnerabilities affecting the software stacks used to develop software at SEEK.  
• Mentor junior penetration testers and help improve testing methodologies. 

Skills and experience

Essential Qualifications, Skills, and Experience

• 5-7 years working in an offensive security role.
• Well versed in Web application and API security.
• Advanced skills in Burp Suite, Metasploit, and various exploitation frameworks.
• Familiar with advanced exploit writing techniques. 
• Proficient in at least one programming language (Typescript, JavaScript).
• Basic proficiency in databases and Linux/Windows/ system administration.
• OSCP/GPEN/Crest CCT.

Other Qualifications, Skills and Experience

• IOS mobile penetration testing experience.
• Proficient with software development tools (git, vscode, etc).
• Experience with secure or offensive code review preferred.
• Published research, exploits and vulnerabilities (CVEs).
• Excellent communication skills.

Perks and benefits

At SEEK we offer:

• Support of flexible working, including a mix of office and work from home days depending on your role
• SEEK is committed to preparing for the impacts of climate change and the transition to a low-carbon future, and manages its environmental impacts including on climate change.
• The opportunity to work from anywhere for up to 4 weeks per financial year
• Frequent events including sports days, year-end party, hackathon, and trivia
• Casual dress every day

At SEEK, we are passionate about fostering a culture of inclusion and wellbeing that embraces and values the diversity of our people. We are a purpose driven business that works with heart.

We know teams with diverse ideas, experiences and perspectives are more creative and are critical to ensuring effective delivery and innovating to enable our future success. As such, we welcome applications from people with diverse backgrounds and life experiences, especially as they relate to gender, sexual identity, culture, faith, disability and life stages. If you have the skills, curiosity and an adaptable mindset but don't meet every responsibility or qualification listed in this advertisement, please still get in touch with us. Should you require any specific support or adjustments throughout the recruitment process and beyond, please advise us and we will be happy to assist.

For this role, only those with eligible right to work will be considered.

SEEK kindly requests no unsolicited resumes or approaches from recruitment agencies and will not be responsible for any associated fees.

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