lukas-petra
Backend & GenAI Engineer with 7 years of experience spanning application security, cybersecurity, and software engineering.
About
Backend & GenAI Engineer with 7 years of experience spanning application security, cybersecurity, and software engineering. Over the past 2 years, I have designed and deployed production-grade LLM and RAG systems for B2B clients.
My security background strengthens my ability to design resilient architectures, review code critically, and build AI systems with production reliability in mind. I specialize in building typed, maintainable Python systems using modern AI orchestration frameworks.
I’m known for being honest, direct and solution-focused.
- 3 years' experience
- Joined March 2026
Languages
- EnglishAdvanced
- LithuanianFluent
Industry experience
- Financial Services
- Media & Entertainment
- Transportation & Logistics
- Software & Internet
More experts in Vilnius, Lithuania
Work experience
Started working as a Freelance & Contract engineer. Based in EU, Vilnius • Built pro-code solutions for clients: Google ADs automation, secure FastAPI servers+sqlalchemy, legacy code refactoring(js->py), genai powered code-doc generator, crawl4ai scrapers and more. • My stack: Python, LangGraph+LangSmith, AWS, Azure AI Foundry.
• Refined the main Python script to make it simpler and more efficient, paving the way for full cloud automation instead of manual deployment on individual computers. • Managed EDR updates across 15,000+ global devices, meticulously following change management processes to minimize risks and ensure seamless rollout
• Source Code Review for iOS clientside applications. • Threat Modelling Sessions. • Reviewed and evaluated Penetration Testing Reports to accurately reproduce findings within application security.
Education
Hands-on training where we built systems from the ground up and then actively tested and broke them - giving me early exposure to purple teaming practices. This helped me develop a practical understanding of how systems fail, and how to design them more securely and reliably. We reinforced offensive and defensive skills through platforms like OverTheWire, along with 300+ hours of in-class work focused on installing, upgrading, troubleshooting, and stress-testing Debian and Windows environments - building a strong foundation in system behavior, debugging, and real-world failure scenarios.
Certifications and awards
LangChain Academy certificate: https://academy.langchain.com/certificates/bcgrtorery
LangChain Academy certificate: https://academy.langchain.com/certificates/ifuvahy76x
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