Zagreb - Application Security Internship

At Infobip, we dream big. We value creativity, persistence, and innovation, passionately believing that it is through teamwork that we can all reach greater heights.

Since 2006, we have been innovating at the edge of technological possibilities and are now shaping global communications of the future. Through 75+ offices on six continents, Infobip’s platform is used by almost 80% of the population, making it the largest network of its kind and the only full-stack cloud communication platform globally.

Join us on our mission to create life-changing interactions between humans and online services with new and unseen solutions.

Summer Internship Program

We are kicking of our 2025 Summer Internship program and looking for students of technical faculties.  

If you are someone who values a humble mentality, embraces a learn-by-doing approach, thrives in collaboration with diverse minds, and is ready to let your potential shine? If so, this opportunity is perfect for you!  

 
As part of our Application Security team, you will have an impact on security aspects of the infrastructure and complete application stack utilized by the Infobip platform in multiple environments (dev, staging, production). You will experience dealing with challenges of protecting the security posture of a complex multi-data-center architecture and continually improving it through security review and analysis. 

At our  two-month paid  Aplication security internship program, you will: 

• Familiarize yourself with OWASP Top 10 and/or SANS 25 

• Consult development teams how to fix their code based on vulnerabilities 

• Perform code reviews 

• Perform active testing of Infobip services 

• Learn how to perform security reviews and issue triage 

• Learn how to work with CI/CD pipelines 

• Learn about SDLC in Infobip 

• Learn about different technology stacks based on your interest 

• Work with Java, Spring, Spring Boot, Javascript (React or Vue) and C#, .NET Core 

You will fit in if: 

• You are passionate about security 

• You are a graduate (MA) or final year undergraduate (BA) student of Computer Science, IT, Systems Engineering, Mathematics... 

• You are keen to learn new security methodologies, processes and technologies 

• You have valid student's rights from Studentski centar (can work on student contract during internship and after) 

• You are available full-time for internship in Infobip from July to September  

• You can work full or part time after completing the internship 

You will stand out if you: 

• Have a GitHub profile with some projects to show 

• Participated in some student projects, Hackatons, Capture the Flag competitions, workshops or other 

• Already participated in some internship programs, 

• Are fluent in English and you speak it at a conversational level 

 
Internship timeline: 

• May 25th – application deadline 

• By the end of May – online testing

• June - selection process feedback and interviews 

• July 7th – start the internship program with a 2-week onboarding program in Zagreb,  

• September - end of the Internship program 

Although we currently have openings for various internship programs, you can only apply for a maximum of two positions! 

When you become a part of Infobip you can expect:  

• Orientation week with all interns and a personalized onboarding plan.  

• Mentor and team support.  

• Being a part of a growing company in a growing industry – we challenge you not to grow!  

• Work with people from all over the world. We put the “global” in globalization.  

• Possibility to stay on after the internship, depending on your performance and business needs.  

Why choose internship at Infobip?  

• Paid internship program  

• Travel allowance as per city of work  

• Free lunch  

• Free Snacks and Beverages  

• Social Events  

• Internal Trainings  

• Free access to Udemy platform  

• Internship welcome package  

• Referral Bonus  

• Equipment  

• On-Site Amenities  

Useful links:  

• Visit our internship landing page for more details about the program 

• If you don't find the answers to your questions, feel free to contact recruiter Zrinka on LinkedIn 

Apply if you like this internship description and get a chance to land your first job at Infobip! Good luck! 😊  

Infobip employees are people with diverse backgrounds, characteristics, and experiences that share the same passion and talent that helps us achieve our mission. That's why Infobip is committed to creating a diverse workplace and is proud to be an equal-opportunity employer.

All qualified applicants will receive consideration for employment without regard to race, color, ancestry, religion, age, sex, sexual orientation, gender, gender identity, national origin, citizenship, disability, veteran status, or any other part of one's identity.