Катерина

Kateryna Pazynych Skills
Full-stack developer with over 4 years of professional experience
developing and supporting backend solutions for web applications.
Skilled in building scalable software architectures, implementing Languages
sophisticated business logic, and handling complex data processing PHP
requirements. Proficient in relational database modeling, SQL
Python
performance tuning, caching mechanisms, and reliable transaction
management. Committed to writing clean, maintainable code and JavaScript
delivering efficient, production-ready solutions. TypeScript

EXPERIENCE
Frameworks and Libraries
Fixoraq - Full-stack developer
November 2024 - present Symfony
A business operations platform designed for home improvement and property maintenance Laravel
companies. The system centralizes customer requests, contractor management, job
scheduling, service estimates, and project tracking, helping businesses automate daily FastAPI
operations and coordinate service delivery. ExpressJS

Responsibilities: NestJS
Developed backend functionality using PHP and Symfony, implementing business logic ReactJS
for customer management, service requests, work orders, and contractor coordination.
Implemented job scheduling and assignment mechanisms, allowing service requests to VueJS
be distributed among contractors based on availability, service categories, and NextJS
operational requirements.
Implemented workflow automation for the service lifecycle, including request
processing, estimate approval, job assignment, execution tracking, and completion Databases
verification.
PostgreSQL
Integrated third-party services and external APIs for calendar synchronization,
customer communication, and operational data exchange. MySQL
Designed and optimized PostgreSQL database schemas and SQL queries for
Redis
customer records, contractor profiles, work orders, scheduling, and service history.
Implemented background jobs and asynchronous processing for notifications, MongoDB
scheduling updates, and data synchronization.
Implemented role-based access control for administrators, internal operators,
contractors, and customers. Tooling & DevOps
Stack: PHP, Symfony, PostgreSQL, Redis, React, TypeScript, RabbitMQ, Laradock,
Docker/Laradock
PHPUnit, PayPal.
RabbitMQ
Dorchive - Full-stack developer
WebSockets
October 2023 - November 2024
An enterprise document management platform designed to centralize document storage, Supabase
automate approval workflows, manage document versions, and ensure secure access to Firebase
business records. The system supports configurable approval processes, audit trails, and
role-based access control. CI/CD pipelines
PHPUnit
Responsibilities:
Implemented multi-stage approval workflows with configurable rules, reviewer Nginx
assignments, status transitions, and validation of business processes. Elasticsearch
Implemented document versioning, change history, and audit logging to ensure
traceability of document modifications and approval activities.
Selenium
Implemented audit logging to record document-related activities, approval decisions,
user actions, and changes to document metadata.
Languages
Integrated AWS S3 for document storage, implementing file upload and retrieval
operations, metadata handling, and secure access mechanisms. English - Intermediate
Integrated file storage services for uploading, retrieving, and managing documents,
including metadata processing and access validation. Ukrainian - Native
Developed document generation and export functionality, including PDF generation
and document template processing. Russian - Native
Stack: PHP, Symfony, ReactJS, MySQL, Redis, Elasticsearch, Docker, PHPUnit,
Selenium, AWS S3.

Travether - Full-stack developer
July 2022 - October 2023

A travel technology platform that aggregates hotel accommodations and travel services from multiple suppliers, providing
centralized search, availability comparison, pricing, and booking management through a unified interface.

Responsibilities:
Developed backend functionality using PHP and Symfony, implementing business logic for accommodation search, availability
management, pricing, and booking workflows.
Implemented integrations with external travel providers, developing API adapters to retrieve, normalize, and process
accommodation data, prices, and availability.
Implemented data synchronization and caching mechanisms using Redis to improve response times and reduce redundant
requests to external providers.
Designed and optimized database schemas and SQL queries in PostgreSQL and MySQL, improving the performance of
search and booking-related operations.
Implemented background processing for supplier data synchronization and other time-consuming operations, including error
handling and retry mechanisms.
Integrated external services and implemented robust handling of API failures, timeouts, and inconsistent responses from third-
party providers.
Developed and maintained automated tests, refactored existing code, and improved the reliability and maintainability of
backend components.
Stack: PHP, Laravel, TypeScript, React, PostgreSQL, Redis, RabbitMQ, Google Calendar API, Docker.