Олексій

Alex Profile
Marchenkovsky Senior Engineer with 14 years of experience building complex web systems and modernizing legacy
codebases. I manage the full product lifecycle, from system architecture and hands-on coding to
infrastructure automation and documentation. By leveraging AI-driven development for routine tasks, I
FULL STACK WEB DEVELOPER focus on complex logic and architectural reliability. I prioritize pragmatic solutions that balance rapid
delivery with long-term maintainability and cost-efficiency.

Details
Ukraine
Employment History
[open contact info](look above in the "contact info" section) Full Stack Developer, Gelios School
[open contact info](look above in the "contact info" section) AUG 2025 — MAR 2026
• Backend Development: Engineered core school management services and API logic, ensuring
high system availability and data integrity for complex student workflows.
Links • DevOps & Infrastructure: Architected a migration from manual setup to Terraform (IaC), reducing
LinkedIn environment deployment time by 90% (from 5 hours to 30 mins) while hardening network security.
• Leadership & Stakeholder Management: Acted as a bridge between business and tech, facilitating
Telegram
cross-functional meetings and delivering precise technical roadmaps and decision logs for the
PO.
Skills • Complex Data Migration: Orchestrated the migration of 100k+ records from a legacy platform,
providing a high-accuracy data-loss forecast that enabled informed risk management.
Backend: php(Laravel, Yii2,
• Process Engineering: Automated Jira/Git workflows to eliminate informal tasking (20% to 0%) and
Symfony), Node.js(NestJS)
ensure 100% development traceability with standardized documentation.
Frontend: Angular, Vue.js, BEM,
Vitest Full Stack Web Developer, Clockwise Software
JAN 2022 — AUG 2025
DevOps: AWS, Digital Ocean,
• Full-Stack Architecture: Designed and deployed end-to-end solutions for a mind-health platform
Terraform, GitHub, Sentry, Docker
using NestJS, Vuetify, and AWS (Terraform).
Project Management: SDLC, Scrum, • Observability & Reliability: Engineered a custom monitoring system with proactive health checks;
Jira, YouTrack implemented CI/CD pipelines with quality gates to achieve zero-downtime releases.
• Client Management: Acted as a primary technical contact for international clients, ensuring
Automated tests
alignment between business requirements and technical delivery across parallel projects.

Languages Full Stack Web Developer, egolist.ua
SEPT 2021 — DEC 2022
Ukraine • Architecture & Backend: Engineered the marketplace architecture using Laravel and AWS,
Russian implementing LiqPay integration for secure payment processing.
English • Real-time Infrastructure: Deployed Pusher and WebSockets to handle real-time updates and
interactive marketplace features.
• Frontend System: Built a reusable Vue.js UI Kit using BEM methodology, ensuring highly
maintainable and scalable frontend architecture.
• DevOps: Containerized the application using Docker & Docker-compose, managing deployments
on Unix-based environments for consistent development and production cycles.
• Leadership & QA: Led a cross-functional team of 4 (Devs & QA), implementing HTTP tests to
ensure contract stability and 100% frontend-backend synchronization.
• Product Strategy: Acted as PM and Tech Lead, aligning technical roadmaps for Epics with
business goals through close consultation with top management.

Full Stack Web Developer, Clockwise Software
JAN 2018 — AUG 2021
• UI Modernization: Led a strategic migration from AngularJS to Vue.js, delivering a successful
Proof of Concept that enhanced UI interactivity and development velocity.
• Legacy Transformation: Executed complex, high-risk upgrades for multiple systems from Laravel
5.2 to Laravel 10, ensuring long-term security and codebase maintainability.

Backend Developer, TrafficDNA
JAN 2016 — NOV 2017
• Designed and implemented backend logic using PHP (Yii framework) to aggregate and merge ad
campaign results from external sources (Google and Bing APIs) in real-time.
• Engineered high-performance data processing pipelines capable of handling and merging result tables
often exceeding 100,000 rows.
• Achieved critical memory optimization in core processing scripts, ensuring the application fit within the
existing server's physical RAM capacity.
• Resulted in significant infrastructure cost savings by eliminating the need to migrate to more expensive,
high-memory server architecture.

Web Developer, uteka.ua
MAR 2014 — MAY 2015
• Developed core backend services and marketplace logic using PHP (Yii framework) to facilitate the online
reading and distribution of digital periodicals.
• Implemented a complex, feature-rich WYSIWYG text editor with advanced capabilities for content
insertion from external sources while preserving original formatting.
• Engineered a specialized frontend interface featuring two synchronized virtual tabs within a single web
page.
• Solved critical state management challenges by maintaining and synchronizing two separate internal
page history stores with the native browser history

Junior Web Developer, katushkin.ru
MAY 2011 — FEB 2014
• Developed and maintained core backend features and logic using PHP (Symfony/Doctrine ORM) for a
social networking platform.
• Implemented complex, data-rich interfaces for viewing user events and locations by integrating the
Yandex Maps API on the frontend.
• Contributed to UI development using jQuery, composing new, non-templated pages from existing
components to ensure feature delivery and consistency.

Education
Bachelor, Dnipro National University of Railway Transport, Dnipro
SEPT 2007 — MAR 2013
Specialty: Software for automated systems