Security Engineer 5

Oracle; Ireland; On-site; EUR 80,000 - 100,000; Full time

Job summary

A leading technology firm in Ireland is seeking an Offensive Security Engineer to enhance cloud security. The role involves vulnerability assessments, tool development, and collaboration across teams. Ideal candidates have 6+ years of related experience and a strong grasp of programming and security concepts. Join us to tackle complex challenges in a dynamic environment.

Benefits

Competitive benefits

Flexible medical and life insurance options

Retirement options

Volunteer programs

Qualifications

• 6+ years of experience in vulnerability discovery/security engineering/application security.
• Collaborative track record working between internal teams and external organizations.
• Intermediate knowledge of Linux OS Internals.

Responsibilities

• Dive into complex source code audits to uncover security vulnerabilities.
• Develop new tools such as fuzzers in multiple programming languages.
• Guide security projects beyond assessment work.

Skills

vulnerability discovery

application security

threat modeling

programming languages (C/C++, Python)

Linux OS Internals

communication skills

Education

Undergraduate or Graduate degree in relevant field

Job description

Offensive Security Engineer

Oracle Cloud Infrastructure Group

The Oracle Cloud Infrastructure (OCI) Offensive Security team provides OCI with the capabilities to ensure our systems and services meet the security objectives we communicate to customers. The Offensive Security group performs security assessments, vulnerability research, static and dynamic analysis research, penetration testing, red‑teaming, and security tool development. We ensure the security of the software and hardware that runs our cloud infrastructure and strive for continuous improvement. The OCI Offensive Security group works as a team. We don't fit people into predefined roles. We bring together the right people who enhance team capability and build roles around each team member's skills and interests.

Values are OCI's foundation and how we deliver excellence. We strive for equity, inclusion, and respect for all. We are committed to the greater good in our products and our actions. We are continually learning and taking opportunities to grow our careers and ourselves. We challenge each other to stretch beyond our past to build our future. You can learn more about us by visiting https://cloud.oracle.com/cloud-infrastructure.

Are you interested in building large‑scale distributed security systems and tools for the cloud? Do you love the idea of working in an environment with the excitement of a start‑up, but the financial backing of a Fortune 100 company? This role offers huge upside potential, high visibility, and fast career growth without the risks of a typical start‑up. We are growing fast, maturing, and working on results‑oriented initiatives. A security‑focused leader can have significant technical and business impact. This is a unique opportunity to work with smart people to solve complex problems in distributed systems, security, and multi‑tenant Infrastructure‑as‑a‑Service (IaaS) operating at massive scale. The biggest challenges for the team is the dynamic and fast growth of the business, driving us to improve our systems, tools, and automation to scale to our security expertise several orders of magnitude greater than what we can support today. We understand that software is living and needs investment. The challenge is making the right tradeoffs, communicating those decisions effectively, and crisp execution. We hope you like working at scale as much as we do because Oracle has no shortage of it! Craft the future of one of the largest clouds on earth with us!

This role is for a hands‑on cloud hacker on the Offensive Security Team.

To get you excited, here is a list of some of the projects over the last year this team has worked on:

• Big iron - ExaLogic, ExaData, UltraSPARC, InfiniBand
• Firmware reverse engineering of various hardware components
• Developing custom fuzzing platforms for code‑coverage analysis
• Several different hypervisors
• Linux and Windows kernel mode non‑sense
• The list goes on and on!

Responsibilities

• You enjoy diving into complex source code audits to reveal subtle security vulnerabilities
• Writing new tools such as fuzzers in languages such as C/C++, Python, Ruby, Go or Java,
• Tearing apart an undocumented file format or network protocol
• Coming up with novel techniques to solve unique and interesting security problems
• Review new services, including their integration points with existing services
• Guide security projects beyond the scope of performing assessment work
• Identify and disclose vulnerabilities to 3rd party vendors
• Design complex systems and services that improve quantity or quality of offensive security output
• You'll reviews new features of moderate complexity in existing systems, identifying areas of new risk created; work with service teams to explore and recommend mitigations; and collaborate across service teams and security stakeholders.
• Review new services, including their integration points with existing services
• Guide security projects beyond the scope of performing assessment work: identifying and disclosing vulnerabilities to 3rd party vendor or design of complex systems and services that improve quantity or quality of offensive security output
• You'll drive organization wide improvement in the form of engineering practices, security architecture, operation practices or development practices.
• You'll reviews new services and their integration points with other services; guides security assessments of our most complex or important products, and is independently capable of balancing business and security risk; and apply your expertise in business‑critical security area to advance the business relative to the industry.

Required Qualifications

• 6+ years of experience in vulnerability discovery / security engineering / application security
• Threat modeling experience of microservice architectures
• Experience working in a large cloud or software company
• Extensive research or experience with multiple classes of security bugs
• Evidence of contribution to the security community in the form of conducting training / thought leadership / conference talks / publications
• Improve security throughout the organization, identifying areas of risk or opportunities for improvement and piloting them
• Be a subject matter expert in at least one business‑critical area (e.g. cryptography, hardware security, operating systems, authentication protocols, fuzzing, DoS mitigation, networks, distributed systems)
• Collaborative track record working between internal teams and external organizations
• Excellent organizational, verbal and written communication skills
• Intermediate knowledge of Linux OS Internals
• Advanced knowledge of one programming language and ability to read two high level programming language such as Java

Preferred Qualifications

• Undergraduate or Graduate degree in Electrical Engineering, Computer Science, or another related field or equivalent work experience.
• Hands‑on experience developing services on a public cloud platform (e.g., AWS, Azure, Oracle)
• Building continuous integration/deployment pipelines with robust testing and deployment schedules
• Experience working with internal customers and translating requests into prioritized work or features
• Expertise in applying risk identification techniques to develop security solutions
• Experience and understanding of Cryptographic algorithms, standards, implementation and application
• Experience and understanding of threat modeling, penetration testing, reverse engineering and attacks on software
• Experience working with large enterprise customers

Career Level

IC5

About Us

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