Владислава

Vladyslava Shakalo
Software Engineer · PHP · Symfony · DDD · AWS

Kraków, Poland [open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) LinkedIn

PROFESSIONAL SUMMARY

Software Engineer with 6+ years of experience building high-load B2B platforms at scale — up
to 7M API calls/day, 500 peak RPS, and 50k–150k monthly active users. Strong expertise in
PHP, Symfony, Domain-Driven Design, and AWS, with a proven track record in system
reliability, asynchronous architecture, and large-scale refactoring. Known for improving
engineering quality through mentoring, code reviews, and architectural improvements.

EXPERIENCE

PHP Software Engineer — BINTIME IT Company Jun 2022 – Jun 2026 | Warsaw, Poland
High-load B2B platform for electronic devices. PHP 8.3, Symfony 6.4, DDD architecture, MongoDB. 25-
person engineering team.
• Reduced platform failure rate by 95% by designing Symfony Messenger + AWS SQS asynchronous
processing with delayed reprocessing strategies and idempotency checks to prevent duplicate operations at
scale
• Improved test coverage by 35% by introducing PHPUnit tests across unit, functional, and integration
levels for core business modules
• Refactored a message dispatch system using the Strategy pattern, replacing a large conditional flow with
independently testable strategy classes per message type, reducing regression risk and simplifying the
addition of new message types
• Led a major shared-services refactoring initiative: extracted order update and quota management logic
from the platform's largest modules into reusable shared services, significantly reducing duplication and
improving long-term maintainability
• Contributed to CI/CD pipeline optimisation on GitLab, reducing deployment times and improving release
confidence
• Mentored junior developers through code reviews and onboarding; led architecture discussions and
internal knowledge-sharing sessions
• Integrated AI-assisted tooling (GitHub Copilot, Amazon Q) to improve development velocity and code
quality

PHP Software Engineer — Eurosender May 2021 – Jun 2022 | Ljubljana, Slovenia
International logistics platform handling 30,000+ deliveries/month, integrated with 100+ verified carriers including
DHL, DPD, and GLS.
• Integrated REST and SOAP APIs for multiple courier providers, enabling reliable automated shipment
processing across a large carrier network
• Refactored and optimised existing modules, reducing technical debt and improving long-term
maintainability
• Accelerated carrier coverage growth by delivering new integrations and features in a cross-functional
team, contributing to a network of 100+ verified carrier connections
PHP Software Engineer — Facilogi May 2020 – May 2021 | Paris, France
DDD-based online real estate platform for property sales and rentals across Europe.
• Led migration from Propel ORM to Doctrine, improving query performance and long-term maintainability

• Upgraded the application from Symfony 2 to a modern Symfony version, eliminating significant legacy
technical debt
• Implemented Redis-based caching for key platform workflows, reducing response times on high-traffic
pages by roughly 2–3x

TECHNICAL SKILLS
Backend: PHP 8+ · Symfony 6+ · Symfony Messenger · DDD · Event-Driven Architecture · REST APIs
AWS: SQS · SNS · S3
DevOps: GitLab CI/CD · Docker · Kubernetes
Databases: MySQL · PostgreSQL · MongoDB · Redis · Elasticsearch
Code quality tools: PHP-CS-Fixer · PHPStan
AI Tooling: GitHub Copilot · Amazon Q · Claude Code
Testing: Unit, functional, and integration testing (PHPUnit)

EDUCATION

Bachelor of Information Systems & Technologies · Dnipro University of Technology 2015 – 2020 |
Dnipro, Ukraine

AWS Certified Cloud Practitioner (CLF-C02) Preparation Course · Udemy 2025 | Online

PHP Practice Course · Level up 2017 – 2018 | Dnipro, Ukraine

LANGUAGES

Ukrainian (Native) · English C1 (Professional) · Polish B1 (Intermediate)