Tune in for calm, clear, and engaging essentials that help you stay secure in a digital world.
This year, Secure9 invites you to take a mindful approach to cybersecurity — one that replaces noise with awareness, and panic with intention.
From insightful speakers to interactive activities, we’ll explore how small shifts in focus can strengthen your security defenses. And of course, we wrap it all up with a hands-on challenge at the Capture the Flag competition.
Every minute of Secure9 will be dedicated to helping us safeguard ourselves, our services, and our customers — one breath at a time.
Inhale. Exhale. Secure.
Join our sessions!
Go hack yourself! Why it is important to think like a hacker.
29th September, 15:00 – 16:00 CET
The best defence is a strong offence! Do you want to code more securely? Then think like a hacker! Whether you’re a developer or security specialist, this talk shows how to prevent and mitigate threats and protect your applications and users. You’ll see what real-world attacks look like, explore case studies on common pitfalls, and learn how to build a culture of security awareness. Secure coding will become a natural part of your development process.
Jailbreaking Large Language Models Across Their Lifecycle
30th September, 15:00 – 15:35 CET
Large Language Models (LLMs) can be compromised long before they reach end users. From poisoned training data and malicious fine-tuning to real-time prompt injections, attackers have multiple chances to “jailbreak” AI systems and bypass safeguards. This talk explores vulnerabilities across the full LLM lifecycle — training, fine-tuning, and inference. It also highlights defense strategies, including how AWS and Azure tools can help build more resilient GenAI systems.
Prompt Injection: The Hidden Threat in AI Conversations
1st October, 15:00-15:35 CET
Large Language Models like ChatGPT and Claude are used in applications from summarizing documents, to writing code, to automating business processes. But with new power comes new risks, and one of the most important is Prompt Injection. This is a way of tricking an AI system into doing something it wasn’t meant to — ignoring instructions, leaking data, or executing malicious actions. In this talk, we’ll cover what prompt injection is, why it matters, and how to defend against it.
Hope for the best but prepare for the worst - Threat Modeling in Software Systems
2nd October, 15:00-15:35 CET
You wouldn’t leave your new car parked with the keys in the ignition on a dubious back alley, right? We constantly think about risks in daily life and take steps to avoid them. Why not do the same for the software we create? This talk draws parallels between everyday risk awareness and secure coding.
To be announced
October 7, 2025, 16:00 – 17:00 CET
To be announced
October 7, 2025, 16:00 – 17:00 CET
Shifting Security Everywhere
October 7, 2025, 16:00 – 17:00 CET
As a software developer, you may feel that the meaning of ‘shift left’ is lost. It was supposed to mean ‘starting security as early as possible in the SDLC’, but was transformed into “buy this product, put it in your CI/CD, then your apps will be secure”. But we can’t just throw a bunch of tools into a CI/CD and call it a day. With this in mind, let’s focus on comprehensive programs, developer buy-in, and making security work for the entire business, by shifting security everywhere.
Shifting Security Everywhere
October 7, 2025, 16:00 – 17:00 CET
As a software developer, you may feel that the meaning of ‘shift left’ is lost. It was supposed to mean ‘starting security as early as possible in the SDLC’, but was transformed into “buy this product, put it in your CI/CD, then your apps will be secure”. But we can’t just throw a bunch of tools into a CI/CD and call it a day. With this in mind, let’s focus on comprehensive programs, developer buy-in, and making security work for the entire business, by shifting security everywhere.
Register to Attend Secure9
Secure9 is back — and you’re invited!
Join us for a day of inspiring cybersecurity talks, practical insights, and expert knowledge from top tech professionals at Levi9.
Whether you’re a developer, engineer, student, or tech enthusiast — there’s something here for you.
Capture The Flag 2025
CTF9 is back to test your hacking skills like never before. The Capture the Flag Competition (CTF9) is where real Levi9 hackers thrive. Gather your team or go solo and join us on October 3, 2025 to demonstrate your ability.
Top 3 teams will walk away with amazing prizes.
We encourage you to collaborate with customers and alumni on your team and make this year CTF9 an event to remember. Mark that at least one team member of a team has to be a levi niner!
Meet & Greet the Team
They are the masterminds behind the Secure9 tradition.
Milic Vuletic
Cyber Security Lead
Alexandru Vornicu
ISO
Serhii Rozumenko
ISO
Vladislava Stanivukovic
ISO
Branislav Bozejac
Cyber Security Specialist
Julija Gojković
Employer Branding Expert
Veljko Karadzic
ISO
Tanya van Witzenburg
HQ ISO
Miloš Milovanović
Cyber Security Specialist