Олександр

ALEX PAVLIUK | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

2+ years of Backend Developer experience, developing REST APIs and highly available microservices.

PROFESSIONAL EXPERIENCE

UpKeepDay | Backend Developer | Aug 2023 – Sep 2024
UpKeepDay is an all-in-one platform designed to simplify operations for tutors, enrichment schools, and after-school
programs.

Developed core features of product using Django and Django Rest Framework (DRF)
Optimized slow-running queries by adding targeted indexes and eliminating redundant joins, reducing query
time by ~10%
Decreased API response time by 40% (300ms -> 120ms) adding Redis caching
Built the end-to-end password reset flow using RabbitMQ for async email delivery; separately built background
PDF report generation with Celery, removing report generation from the request/response cycle
Integrated Stripe to support one-time tuition payments
Wrote unit tests for every feature shipped, using unittest
Stack: Django/DRF, PostgreSQL, Celery, Redis, RabbitMQ, unittest, AWS, Docker, git
HorandLTD | Backend Developer | Sep 2024 – Nov 2025
HorandLTD is a UK-based company providing virtual assistant and media services to clients across the United Kingdom,
with a focus on IT, logistics, media, design, architecture, HR, and other professional fields.
Developed backend with microservices architecture using FastAPI
Worked with SQL using SQLAlchemy; managed migrations using alembic
Used RabbitMQ for event base communication between microservices
Implemented SAGA and Outbox patterns to guarantee consistency across 3 microservices without distributed
transactions; added Circuit Breaker to prevent cascading failures during ActionBot service downtime
Added retry logic with backoff for synchronous inter-service requests
Wrote tests for every feature shipped, using pytest
Orchestrated 3 microservices locally with Docker Compose
Rewrote file upload handling with asyncio, cutting upload time by ~40%
Stack: FastAPI, SQLAlchemy, alembic, asyncio, PostgreSQL, pytest, RabbitMQ, Docker/Docker Compose, Redis,
git, CI/CD

PERSONAL PROJECTS

XiChess | https://github.com/linwexEU/chess
XiChess is a lite copy of chess.com.

Reduced move-broadcast latency to 5-10ms by caching game state in Redis instead of hitting Postgres on every
move
Stack: FastAPI, SQLAlchemy, alembic, HTML/CSS/JS, PostgreSQL, Redis, smtp, websockets, RabbitMQ, git

Autoria-Parser | https://github.com/linwexEU/autoria-parser
Built a scraper to collect listings from AutoRIA on a scheduled basis, with run times configurable via
environment variables
Used background tasks to run the scraper and database dump jobs on a schedule
Stack: Playwright, bs4, SQLAlchemy, Alembic, PostgreSQL, Docker/Docker Compose

LANGUAGES English (B2) | Ukrainian (fluent) | Russian (fluent)