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dkrizhanovskyi/README.md

Daniil Krizhanovskyi - Distributed Systems, Cryptography, and Applied Mathematics Engineer

Welcome to my GitHub portfolio. I am a seasoned engineer specializing in distributed systems, cryptography, and applied mathematics. My focus is on the practical implementation of cryptographic solutions and the development of scalable, high-performance distributed systems.

🛠 Professional Expertise

  • Distributed Systems: Experience in designing and optimizing distributed systems to handle high-performance requirements, enabling over 1 million requests per second using Rust and C++.
  • Cryptography: Specialized in applied cryptography, including the development of cryptographic protocols for distributed systems and blockchain networks. Proficient in post-quantum cryptography and ensuring system resilience to quantum attacks.
  • Low-Level Programming: Advanced proficiency in Rust, C++, C, Python, and Java. Extensive experience in optimizing mission-critical systems for both performance and security.
  • Backend Development: Skilled in developing and maintaining high-performance backend systems using Rust, with expertise in integrating low-level optimizations and microservices architectures.

💼 Professional Experience

Applied Cryptography Engineer

SecureTech Solutions GmbH, Remote, Austria (Aug 2023 – Apr 2024)

  • Developed cryptographic protocols for securing financial transactions in distributed systems, increasing operational security by 30%.
  • Integrated post-quantum algorithms to ensure system resilience against modern cryptographic attacks.
  • Optimized cryptographic modules in C and C++ for blockchain networks, enhancing performance by 25%.
  • Conducted security testing and verification, ensuring compliance with GDPR and data security requirements.

Middle Rust Engineer

NextGen Technologies, Remote, Rome, Italy (Jul 2022 – Jul 2023)

  • Developed key components of distributed systems, enabling over 1 million requests per second.
  • Optimized critical modules in C and C++, increasing processing speed by 20%.
  • Implemented efficient solutions for blockchain applications, reducing processing delays by 15%.

Rust Backend Developer

InnovateTech Italy, Hybrid, Milan, Italy (Jan 2022 – Jun 2022)

  • Applied low-level optimizations in C and C++ to a microservices architecture, improving system efficiency by 18%.
  • Migrated legacy systems to Rust, enhancing application stability and security.

Rust Developer

TechSolutions UA, Hybrid, Kyiv, Ukraine (Jan 2021 – Dec 2021)

  • Developed high-performance systems in Rust and C++ for various clients, improving performance by 22%.
  • Provided consultancy on integrating cryptographic protocols in distributed systems, enhancing product security.

Junior Rust Developer

TechSolutions UA, On-site, Kyiv, Ukraine (Oct 2019 – Dec 2020)

  • Developed high-performance web servers in Rust for handling high request loads.
  • Optimized asynchronous operations using Tokio and Actix, improving network request handling by 15%.
  • Contributed to developing RESTful APIs for enterprise solutions, ensuring secure and stable data exchange.

🎓 Academic Background

  • Master of Science in Applied Mathematics
    Lviv Polytechnic National University (2020-2022)
    Thesis: "Mathematical Modeling of Cryptographic Protocols for Distributed Systems."

  • Master of Science in Information Systems and Technologies
    Odessa National Polytechnic University (2019-2020)
    Thesis: "Implementation of Post-Quantum Cryptography in Data Management Systems."

  • Bachelor of Science in Computer Engineering
    Odessa National Polytechnic University (2016-2019)
    Capstone Project: "Optimization of Conveyor Production Using C."

📚 Research Projects

Quantum Cryptographic Toolkit

Developed tools for post-quantum cryptography, integrated into distributed systems to improve security by 40%.

Optimization of Distributed Consensus Protocols

Researched and optimized consensus protocols, enhancing scalability by 25% for distributed systems.

High-Performance Systems in Industrial Pipelines

Optimized industrial conveyor production processes using C and C++, increasing efficiency by 30%.

🧠 Research Interests

  • Distributed Systems and Blockchain Security
  • Cryptography and Post-Quantum Cryptography
  • High-Performance Computing in Cryptography and Industrial Applications
  • Optimization of Consensus Mechanisms in Decentralized Networks
  • C and C++ Optimization for Low-Level System Performance

📄 Publications

💬 Contact Information

Thank you for visiting my GitHub portfolio. I am open to collaborations in distributed systems, cryptography, and applied mathematics.

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  1. quantum-vqe-project quantum-vqe-project Public

    Optimization of Variational Quantum Eigensolver (VQE) circuits using gradient descent and parallel processing. Includes hyperparameter optimization through random search.

    HTML 1

  2. quantum_cryptographic_toolkit quantum_cryptographic_toolkit Public

    The Quantum Cryptographic Toolkit (QCT) is a comprehensive framework designed to facilitate the development, testing, and deployment of quantum-resistant cryptographic algorithms.

    Rust 3