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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.…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.

lukas-petra

PRO

AI Engineer, Back-End Developer

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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.…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.

Next availability:

April 6, 2026

Vilnius, Lithuania

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.

Skills

Experience Level

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Advanced

Lithuanian

Fluent

Work Experience

APPLICATION SECURITY SPECIALIST at Nord Security

September 1, 2022 - February 9, 2023

• Source Code Review for iOS clientside applications. • Threat Modelling Sessions. • Reviewed and evaluated Penetration Testing Reports to accurately reproduce findings within application security.

CYBERSECURITY ENGINEER at MOODY'S CORPORATION

January 16, 2024 - April 10, 2026

• 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

FREELANCE AI SOFTWARE ENGINEER at PHOENIXSEC

May 14, 2024 - Present

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.

Education

NETWORK AND SYSTEM ADMINISTRATION/ADMINISTRATOR at Computer Science Classes of Natalya Kazakova

September 1, 2014 - July 1, 2017

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.