Application Security Summer Intern
Start your journey in a learning‑driven environment, inside a fast‑paced and ever‑evolving world of tech and innovation.
At Celfocus, you’ll work with diverse teams on real projects and see how ideas turn into real impact.
Hybrid ways of working, international projects, and the space to explore different paths as you grow.
Explore your way in.
About the role
As an Application Security Intern, you will assist the security team in identifying, analyzing, and mitigating security vulnerabilities in software applications. Your responsibilities may include supporting secure code reviews, participating in penetration testing, researching common threats, and helping implement security best practices across the development lifecycle.
As a part of your job, you will:
Conducting analysis and threat modeling for new and existing Celfocus products/projects.
Analyzing and discussing requirements; interacting with all participants in the software development process.
Penetration testing web applications.
Conducting both manual and automated testing.
Participating in the creation and development of the company's products at all stages of their life cycle.
What are we looking for?
A lively and flexible mind, clear logic, a detail-oriented approach.
Knowledge of HTTP.
Working knowledge of programming languages
Knowledge of the Top 10 OWASP vulnerabilities: how to find, exploit and fix them.
The desire and ability to work in a team.
The desire to develop yourself in the field of application security.
Knowledge of English at least at the level of reading technical documentation.
Nice to have:
Good knowledge of Linux or Windows operating systems.
Skills in scripting and automating your work using Powershell, Python, Bash, etc.
SAST (Sonarqube, Fortify, etc.
SCA (Dependency Check, Whitesource, etc).
DAST (ZAP, Burp, etc).
Defect Dojo.
Java, PHP, Python, C, etc.
Pipelines (Jenkins, Gitlab CI/CD, Azure DevOps, etc).
Personal traits
Ability to adapt to different contexts, teams, and Clients;
Teamwork skills but also a sense of autonomy;
Motivation for international projects and ok if travel is included;
Willingness to collaborate with other players;
Strong communication skills.
What’s in it for you
• Hybrid way of working with flexibility and balance
• Opportunity to work on international projects
• Possibility to explore different roles and career paths
• Continuous learning and development opportunities
• A growing AI‑driven environment, working with the latest technologies
• A set of benefits and perks to support your day-to-day
A place for everyone
At Celfocus, we are committed to cultivate a diverse and inclusive workplace. As an equal-opportunity employer, we welcome applicants of all backgrounds, gender identities, and abilities.
If you require any adjustments during the selection process, please inform our Talent Acquisition Team.
About Celfocus
Celfocus is pioneering the future of business through Next-Gen Intelligence - the convergence of data, AI, and human creativity to build more autonomous and adaptive organisations.
Guided by our core belief - Making Data Actionable - we partner with leading companies to co-create intelligent solutions that turn data into insight, agility, and business value.
Operating in over 25 countries, we bring together business experts, data scientists, and AI engineers to turn complexity into clarity and vision into measurable impact.
Founded in 2000, Celfocus is part of Novabase, listed on Euronext Lisbon.
To know more, visit www.celfocus.com