Олександр

Fedorenko Oleksandr
Senior PHP/Laravel Backend Engineer with 8+ years architecting high-load distributed systems, AI-driven automation platforms,
and API-first infrastructure for US and European clients. Expert in Laravel, Elasticsearch, MySQL, event-driven microservices,
and full-stack automation. Translating complex business requirements into reliable, scalable engineering solutions.

EXPERIENCE CONTACTS

AI Marketing Platform (Stealth Startup) — Backend Engineer [open contact info](look above in the "contact info" section)
Jun 2024 – Feb 2026 (Ukraine / Europe, remote) [open contact info](look above in the "contact info" section)

•Architected a zero-to-production automated AI blog platform compressing site
provisioning time from ~24 hours to ~5 minutes (97% reduction). SKILLS
• Engineered a unified automation pipeline integrating APIs, eliminating all manual Languages & Frameworks
provisioning steps across 5 vendor systems.
PHP (7/8), Laravel, REST /
• Optimized Core Web Vitals and page speed across 100+ live sites increasing organic
visibility for all managed properties. RESTful APIs, MVC

• Redesigned X (Twitter) API interaction layer with intelligent rate-limit management and Software Engineering
anti-detection logic, slashing account ban rate from weekly blocks to <1%.
OOP, SOLID, Design Patterns,
Sphere Digital LLC — Senior Backend Engineer
System Design, Microservices
Sep 2021 – Mar 2024 (USA, remote)
Architecture, High-load
• Engineered queue-based processing and Elasticsearch indexing across 100,000+ records,
reducing API response times by 40% Databases & Search

• Built an internal marketing automation platform scaling campaign deployment to 50+ MySQL, PostgreSQL, SQL
launches/week, cutting campaign setup time from 2+ days to under 2 hours.
Optimization, Elasticsearch,
• Developed an IP/ASN reputation analysis engine (RIPE/ARIN + blacklist feeds) processing Redis
thousands of IPs concurrently, reducing false-positive blocks by 30%
Infrastructure & DevOps
• Integrated PayPal, banking APIs, and crypto wallet management into automated financial
flows, processing 100% of transactions without manual reconciliation. Docker, CI/CD, Git, Linux,
Kavit Electronics — Lead Backend Developer Composer
Feb 2020 – Aug 2021 (Ukraine, on-site)
Backend Architecture
• Designed a Laravel customer portal for an ISP/VoIP provider serving 5,000+ active users,
reducing support ticket volume by enabling self-resolution of billing and account tasks. Queues (RabbitMQ / Redis),
Background Jobs, Event-Driven
• Integrated Asterisk PBX and RADIUS servers for real-time billing and call analytics,
processing 10,000+ calls/month with zero billing discrepancies. Architecture, Cron Jobs

• Automated banking API payment processing, cutting manual accounting workload by Security & Integrations
70% and eliminating month-end reconciliation backlogs entirely.
Authentication, Authorization,
ITI Group — Backend Engineer → Lead Developer
Third-party API Integrations
Dec 2017 – Dec 2019 (Ukraine, on-site)

• Refactored a legacy PHP monolith to PSR-compliant Laravel architecture, cutting LINKS
new-developer onboarding time by ~50% and reducing post-release bug rate.
• Integrated government registry APIs for automated legal compliance verification, LINKEDIN
eliminating 100% of manual document validation steps across all trading workflows.
[open contact info](look above in the "contact info" section)
• Built a high-volume document generation engine (Excel, Word, PDF) producing 10,000+
andr-fedorenko-377637130/
regulatory documents/month for B2B agricultural fund operations.
GITHUB
EDUCATION
https://github.com/FedorenkoAlex
KRYVYI RIH NATIONAL UNIVERSITY — Master's Degree
322
Sep 2019 - Dec 2020 (Ukraine)

The Faculty of Information Technology, major in Automation and Systems Engineering
LANGUAGES
KRYVYI RIH NATIONAL UNIVERSITY — Bachelor's Degree
ENGLISH - fluent​
Sep 2015 - May 2019 (Ukraine)
UKRAINIAN - native
The Faculty of Information Technology, major in Automation and Systems Engineering