Welcome to my blog! My name is Kostiantyn, and I’m a Software Craftsman from Ukraine with a focus on developing and automating modern security solutions that help optimize a company’s security-related costs.
I have hands-on experience that includes, but is not limited to:
- Windows security hardening, from Kerberos to configuring AD group policies to accommodate CIS requirements for OS, applications, etc.
- SIEM/SOC-related practices, from agent configuration on Windows/Linux hosts to creating reports for Windows Defender EDR or configuring DLP with Windows Defender EDR capabilities.
- Understanding Windows OS internals, primarily in C/C++ related to the Windows OS, memory dump analysis, etc.
- AppLocker/Windows Firewall/other security configuration and support for large enterprises.
- Understanding Windows Kernel mode and writing Windows drivers.
- Understanding Attack Techniques and Defensive Security Approaches
- Network protocols and firewall configuration.
- Creating DevOps approaches to deliver security through CI/CD processes in modern ways.
- Authentication solutions (creating custom modifications of authentication flows).
- Keycloak (from source code understanding to writing custom SPIs).
- Creating Solution Architectures (mostly related to AuthN/AuthZ).
- Managing Dev and DevOps teams.
- Kafka
- Gatling (performance testing)
- Docker
- Git
- Architectural patterns (SAGA, CQRS, Outbox, etc)
- Different type of authorization including Distributing Authorization with sidecar containers / OPA / rego policies
- etc
I can read and understand source code written in different languages (including code created by companies like Google/Microsoft and so on):
- C/C++
- C#
- Java
- JavaScript/TypeScript
- Python
- Golang
- PHP
- Perl
- PowerShell
I’m also familiar with various modern cloud related technologies such as:
- AWS
- Kubernetes
- Grafana
- helm
- Prometheus and so on
Currently, I work in the financial sector as the Architector and Lead of Dev/DevOps teams, primarily involved in developing and creating security solutions.
With nearly 20 years of experience in the IT field, I use this blog to share my thoughts and insights, aiming to offer something interesting for both newcomers and experienced IT enthusiasts.