Job Specifications
Position Summary
As a key member of our Internal Product Security Engineering team, you will lead penetration-testing engagements for high-scale web applications and APIs, validating security controls and uncovering exploitable weaknesses. In parallel, you will conduct structured threat-modeling workshops and security-design reviews for new features and services, managing each engagement from scoping to remediation follow-up in close partnership with engineering and cross-functional stakeholders. The insights you provide will drive prompt fixes and shape the organization's long-term security roadmap.
Key Responsibilities
Penetration Testing
Plan, execute, and document manual and tool-assisted tests for enterprise-scale web apps and REST/GraphQL/gRPC APIs.
Demonstrate exploitation paths (auth / logic / data exposure) and develop proofs-of-concept.
Retest remediations and deliver clear, prioritized reports.
Threat Modeling & Security Design Review
Facilitate formal and informal Threat Modeling using STRIDE-like frameworks or Attack-Tree sessions for new or significantly modified services.
Produce risk artefacts, recommend mitigations, and track closure of findings.
Security Engineering & Advocacy
Champion secure-by-default patterns (least privilege, IaC hardening, SDL best practices) across the SDLC.
Contribute to internal security tooling and CI/CD guardrails.
Requirements:
Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
4 + years in product or application security engineering with hands-on web/API penetration-testing work.
Expertise with a leading pentest platform (Burp Suite Pro, OWASP ZAP, Nuclei, etc.).
Scripting/automation ability in Python, Go, or similar; quick at reading unfamiliar codebases.
Practical experience with STRIDE or comparable threat-model frameworks.
Familiarity with cloud-native environments (microservices, Kubernetes, serverless).
Communication: Exceptional written and verbal skills for both technical and non-technical audiences.
Preferred Qualifications
Offensive-security certifications (OSCP, OSWE, OSWA, BSCP).
Secure-coding experience in languages such as: Java, Node.js, C#, Python, or Rust.
Experience in security controls for cloud platforms such as AWS, Azure, or Google Cloud.
Open-source contributions, bug-bounty recognitions, or CTF placements.
Exposure to mobile or desktop application security.
Knowledge of or interest in AI security controls and testing.
Personal Attributes
Maintains professionalism under pressure.
Meticulous eye for detail.
Self-driven and proactive.
Thrives on complex challenges.
Dependable, cooperative team player.
About the Company
Stefanini Group is a multinational company with a broad portfolio of technological solutions. Our global presence spans 41 countries and 44 languages. Motivated by a shared entrepreneurial spirit, we help our clients transform their business through digital innovation, working in an agile manner and co-creating for a better future.
We believe technology can revolutionize a company and that innovation is essential to foster development and competitiveness. We also value new ideas and the power of an open mind, so we recognize...
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