Vitaliy S.
Verified expert
Vitaliy S.
Verified expert
Top skills
Meet Vitaliy āØ
A Team Lead and Backend Developer with over six years of experience building complex AI-driven platforms and scalable microservice architectures. Vitaliy specializes in Python backend development using FastAPI and Django while leading engineering teams delivering high-load systems across fintech, AI, and digital media platforms.
He has architected and delivered multiple production systems including AI-powered content ecosystems, fintech trading applications with real-time data processing, automated website generation platforms, and mental health chatbots powered by large language models. His work combines strong backend architecture with cloud-native development, event-driven systems, and scalable microservices.
Vitaliy leads development teams, defines coding standards, reviews architecture decisions, and mentors engineers while ensuring reliable system performance and maintainable codebases. His technical stack includes distributed messaging systems, cloud infrastructure, AI integrations, and real-time data pipelines.
If you need an experienced backend architect who can lead teams, design scalable systems, and deliver production-ready AI platforms, Vitaliy is ready to help build and scale your product š
Download the CVHard skills
Python
FastAPI
Django / DRF
Flask
Microservices Architecture
Event Sourcing
Saga / Orchestration
Kafka
RabbitMQ
Celery
WebSockets
REST API Development
OpenAI API
LangChain
Stable Diffusion
SentenceTransformers
Spacy / NLP
SQLAlchemy
PostgreSQL
MySQL
MongoDB
Redis
DynamoDB
Elasticsearch
Docker
Kubernetes
AWS
Google Cloud
Prometheus
Grafana
Nginx
CI/CD (GitHub Actions, Jenkins, Bitbucket CI)
Tools
PyCharm
VS Code
Cursor
MongoDB Atlas
Another Redis Manager
TablePlus
DBeaver
Postman
Sentry
Prometheus
Grafana
Soft skills
Leadership
Architecture thinking
Communication
Mentoring
Problem solving
Ownership
Strategic thinking
Team collaboration
Digital Content Ecosystem
Team Lead | Backend / AI Developer
Project Description:
Designed and implemented a microservice architecture for a platform that collects, analyzes, and generates digital content from multiple sources. Built APIs for content extraction, implemented AI-based content generation using OpenAI, and developed knowledge graph pipelines for entity and relationship extraction.
Tools & Technologies:
Python, FastAPI, SQLAlchemy, Neo4j, OpenAI, LangChain, Google Cloud, PostgreSQL, Redis, Docker.
Mental Health Chatbot
Team Lead | Backend Developer
Project Description:
Led development of a secure conversational AI chatbot capable of real-time interaction with users. Implemented backend architecture supporting conversational memory, guided therapeutic workflows, and high-frequency data processing.
Tools & Technologies:
Python, FastAPI, PostgreSQL, DynamoDB, AWS S3, Lambda, Docker.
AI Web Ecosystem & Fintech Platforms
Team Lead | Backend / AI Developer
Project Description:
Led development of multiple interconnected platforms including a high-load European business information portal with over 15 million pages, an AI-powered website generation platform, and a fintech trading application with real-time market data processing.
Tools & Technologies:
Python, FastAPI, OpenAI, Stripe, WebSockets, PostgreSQL, Redis, Docker, Prometheus, Grafana.
FinTech AI Automation Platform
Lead Backend Developer
Project Description:
Developed microservice-based AI platform automating banking document processing and financial workflows using machine learning and event-driven architecture.
Tools & Technologies:
Python, FastAPI, PostgreSQL, MongoDB, Redis, Kubernetes, Docker, PyTest.
Sports Prediction Platform
Backend Developer
Project Description:
Developed predictive analytics system for esports competitions using statistical models and real-time data streams.
Tools & Technologies:
Python, FastAPI, MySQL, Redis, WebSockets, Docker, AWS.
Chernihiv National University of Technology
Masterās Degree in Computer Science
Chernihiv National University of Technology
Bachelorās Degree in Computer Science
Online Kubernetes Lab
Provider: KodeKloud
Online Kubernetes Lab
Provider: KodeKloud
CTO Course
Provider: CTO Academy
CTO Course
Provider: CTO Academy
Mastering System Design Interview
Provider: Udemy
Mastering System Design Interview
Provider: Udemy
Django Pro
Provider: Hillel IT School
Django Pro
Provider: Hillel IT School
Python Advanced
Provider: Hillel IT School
Python Advanced
Provider: Hillel IT School
This freelancer has not participated in any projects yet.
Design consulting for data processing / LLM python app
āSuperb knowledge of FastAPI and great python skills. Would love to work again.ā
Add Stripe links to Preventable Deaths Tracker Databases
āThis was my 4th contract with Vitaliy ā thank you! Always reliable and delivers excellent work.ā
Coder for complex MacOS task scripts
āQuick and simple. Vitaliy set up code to automate a photo editing task on Mac OS for us. Guided us through the setup process. Responsive and a great result.ā
Increase functionality of the Preventable Deaths Tracker database part 3
āThis was my third contract with Vitaliy and again he completed an excellent job. I highly recommend his work and skills. Thanks again!ā
Optimise the Preventable Deaths Tracker database functionality
āThis was the second contract I have worked on with Vitaliy and he did another excellent job at delivering all the tasks swiftly. He has great problem solving skills and responds quickly.ā
Automation at a VC firm!
āGreat talent! Would work with Vitaliy again!ā
Web Development using web scrapers and data analytics
āVitaliy was excellent, he went over and above to deliver the project swiftly and provide a high-quality end product. Thank you!ā
Elasticsearch - additional features in the existing database
āThis is my second project with Vitaliy, he solved all the complicated issues very quickly, excellent job!ā
Python in Elasticsearch
āVitaliy is highly motivated, super professional with Django and Elasticsearch, AND heās managed very well with the Hebrew font. He responds promptly and offers creative solutions. It was a pleasure.ā
