● Situation: A company of 15 developers operates remotely. There arose a need to control unauthorized copying of source code and databases to personal storage media after working hours without purchasing expensive enterprise systems.
● My Engineering Solution: Developed a lightweight custom monitoring agent in Go for workstations.
Configured a private server for centralized log collection (ELK Stack) with real-time traffic analytics.
Wrote and integrated a Telegram bot for instant management alerts upon detecting suspicious file operations.
● Result: The owner obtained full control over intellectual property retention without slowing down employee PCs.
● The Client received: Source code and compiled agents (Go), configured ELK Stack server, Telegram alert bot, and technical administration instructions.

● Situation: The chief accountant performed operations with online banking systems and corporate accounts from a personal PC that was also used by family members and had third-party software installed.
● My Engineering Solution: Built a custom secure OS image (Hardened Linux Distro) stripped of unnecessary system services and with network port vulnerabilities disabled.

Configured automated deployment of the image inside a VirtualBox virtual machine with complete isolation from the main OS.

Wrote FIM integrity control scripts that verify the environment before every launch.
● Result: The financial perimeter is completely isolated: any threats from the host OS are unable to penetrate the working virtual machine.
● The Client received: Encrypted Hardened OS image, VirtualBox configuration, FIM scripts, and a step-by-step manual for the accountant.

● Situation: A team of freelancers connected to the corporate code repository from personal laptops containing unlicensed utilities and browser extensions.
● My Engineering Solution: Created an isolated working container with encrypted local drives.

Implemented custom scripts to verify work file integrity before every Git commit.

Configured cryptographic encryption of session data in case of device loss or theft.
● Result: Work files and access keys are protected from reading by third-party applications from the host system.
● The Client received: Container configuration files, code-verification FIM scripts, and instructions for encrypting disk containers.

● Situation: Sales managers used a variety of operating systems (Windows/macOS) with third-party plugins, which complicated secure access to the CRM.
● My Engineering Solution: Designed a unified, minimalistic work OS image with a pre-configured browser and role-based access control.

Configured image launching in a virtual environment (VMware) with one-click state reset to "clean."

Implemented cryptographic protection of the local cache.
● Result: All managers work in a strictly regulated, secure, and easily recoverable environment.
● The Client received: Unified OS image, quick state-reset scripts, and documentation for IT support.

● Situation: A service company sought to transfer operations involving banking data and CRM into a completely closed loop without the use of static passwords.
● My Engineering Solution: Conducted a comprehensive IT configuration audit (Security Assessment) of workstations and cloud services.

Deployed encrypted containerized environments (Docker) to isolate work processes.

Configured strict passwordless hardware authentication based on physical YubiKey keys.
● Result: The risk of data leaks due to the human factor or password cracking was completely eliminated at the hardware level.
● The Client received: Security Assessment Report, configured Docker environment, configured YubiKey keys, and access regulations.

● Situation: An eCommerce project required protecting its customer database from direct access from the external network and unauthorized requests.
● My Engineering Solution: Hardened and isolated the database server within an internal containerized segment (Podman).

Wrote custom firewall rules (IPTables) at the system kernel level to restrict ports and subnets.

Configured FIM monitoring to record changes in access tables.
● Result: The database is completely hidden from the external network, with access provided exclusively via encrypted internal channels.
● The Client received: Podman configuration scripts, set of IPTables rules, FIM scripts, and network schematics.

● Situation: The agency worked with dozens of client ad accounts. A need arose to eliminate the risk of session compromise due to vulnerable employee home networks.
● My Engineering Solution: Conducted an audit of accesses to cloud storage and accounts.
Configured an encrypted environment for working with ad accounts and implemented file integrity monitoring.
Integrated YubiKey hardware keys to confirm critical actions by managers.
● Result: Access to all ad budgets and agency client accounts was secured.
● The Client received: Audit report, secure environment configuration files, and configured YubiKey keys.

● Situation: A software startup was preparing for an investment round and needed to provide confirmation of its infrastructure security and system configuration correctness.
● My Engineering Solution: Conducted a deep analysis of authentication system logs and a revision of access rights across cloud services.

Identified and removed outdated user accounts and improper test scripts.

Configured two-factor authentication rules (2FA / TOTP) and adjusted firewall configuration.
● Result: All system vulnerabilities were eliminated, and the company successfully passed the investment audit.
● The Client received: Security Audit Report, adjusted 2FA configurations, and a cyber hygiene maintenance Roadmap.

● Situation: A system administrator left the company. A necessity arose to verify that no hidden access paths or outdated user accounts remained.
● My Engineering Solution: Performed a complete revision of logs and user accounts across all servers and cloud platforms.

Identified unnecessary active sessions and outdated SSH keys, followed by forced cleanup.

Configured a strict authentication policy and monitoring for new connections.
● Result: All accesses were fully updated and closed, eliminating the risk of utilizing outdated credentials.
● The Client received: Detailed report on identified and closed accesses, updated list of SSH keys, and personnel security recommendations.

● Situation: The company's web server experienced background anomalous requests that loaded the CPU and created a risk of website downtime.
● My Engineering Solution: Conducted an audit of Nginx/Apache system logs and analyzed network port configurations.

Cleaned the system of improper background processes and optimized firewall rules.

Implemented expanded logging and configured two-factor access to the control panel.
● Result: Server CPU load decreased, and the risk of unplanned service downtime was eliminated.
● The Client received: Server audit report, optimized Nginx/Firewall configuration files, and a security manual.

● Situation: A company executive was preparing to sell a share of the business. Search engine results displayed outdated and inaccurate 10-year-old archive records, creating information noise during Due Diligence.
● My Engineering Solution: Conducted a search engine indexing audit (SERP Audit) for key brand queries.

Formulated and submitted official technical-legal requests (Takedown Notices) to platform and search engine administrations based on GDPR/DMCA.

Applied the Reverse SEO method: created and ranked the client's legitimate, verified assets to the top positions.
● Result: The first page of search engine results was cleared of outdated data and contains exclusively relevant business assets..
● The Client received: Analytical "before/after" SERP report, copies of submitted Takedown requests, an optimized profile, and a monitoring dashboard.

● Situation: Outdated legal addresses and contact details of the company were stored in foreign business directories and aggregators, confusing new partners.
● My Engineering Solution: Performed an analysis of indexed links and identified all sources containing outdated information.

Sent technical requests to platforms to update or remove archive profiles.

Optimized the official website and profiles for priority indexing by search engine crawlers.
● Result: All aggregators were updated, and search engine results display only accurate current details.
● The Client received: Link removal and update report, copies of correspondence with platforms, and an updated indexing map.

● Situation: Company employees frequently worked from coworking spaces and hotels, transferring sensitive business documents over public Wi-Fi networks.
● My Engineering Solution: Deployed and configured a private dedicated authorization server to create secure remote access.

Implemented DNS-over-HTTPS (DoH) technology to prevent interception or address spoofing.

Configured automated encryption of file exchange channels and backup copies.
● Result: A closed encrypted channel was created, guaranteeing data exchange security from anywhere in the world.
● The Client received: Configured authorization server, encrypted access keys for devices, and traffic protection instructions.

● Situation: A construction company transferred large-scale drawings and cost estimates to a cloud server, facing risks of data interception by the ISP.
● My Engineering Solution: Configured a private encrypted gateway between the local office network and the cloud.

Implemented cryptographic data encryption immediately before sending over the communication channel.

Configured an access control system based on the Zero-Trust principle.
● Result: Data exchange is performed in a fully encrypted format, inaccessible to interception by third parties.
● The Client received: Configured gateway equipment, encrypted access keys, and Zero-Trust regulations.

● Situation: A branch network transmitted daily financial reports to the head office over unsecure email channels.
● My Engineering Solution: Developed and deployed a private encrypted file-sharing system with automatic destruction of temporary sessions.

Implemented strict device authentication via digital certificate verification.

Configured encryption of DNS queries to conceal the network structure.
● Result: Financial reporting is fully protected from leaks during the data transit phase.
● The Client received: Configured data exchange server, individual digital certificates for branches, and a user manual.