Oleh Kravchuk

AI/ML • Wrocław, Poland • UTC+01:00 • In office, Partially remote, Fully remote • Work permits: Poland • English: B2 • Available in 1 week

Software Developer

16+ years exp

SQL

Node JS

Active 2 days ago

+48 (452) 802111

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Overview

Technical skills

Timeline

Roles

Overview

Senior backend engineer and tech lead with 16+ years of experience building scalable systems and microservices. Has deep experience with DDD and event-driven architectures, and leading cross-functional engineering teams with strong emphasis on reliability, maintainability, and observability. Recently focused on backend/API development using Node.js/TypeScript and SQL/NoSQL databases, including PostgreSQL, Redis, Kafka, and RabbitMQ.

Technical skills

SQL

Node JS• Senior • 10y+

Databases

MySQL• 16y+

RabbitMQ• 10y+

Redis• 10y+

Apache Kafka• 5y+

PostgreSQL• 5y+

ArangoDB

AI/ML

Claude

Claude Code

DevOps

Nginx• 14y+

Docker• 10y+

WebSockets• 10y+

gRPC• 6y+

AWS• 5y+

Azure• 5y+

Grafana• 5y+

Kubernetes• 5y+

OpenTelemetry• 5y+

GCP

GitHub Actions

Datadog

Terraform

Frontend

GraphQL

Timeline

Senior Software Engineer / Lead Specialist • Lead

TheFork • Full-Time

Jun 2025 to Present 1 Year 2 Months Wrocław Partially remote

Built and shipped new product features by validating user needs and feasibility. Owned parts of the system architecture with a focus on scalability and maintainability, and led API development for integrating multiple services. Applied DDD and event-driven communication patterns, and supported migration from legacy code to new business use cases.

Node JS

JavaScript

TypeScript

PostgreSQL

Redis

RabbitMQ

GraphQL

Docker

Datadog

Terraform

GitHub Actions

Lead Technical Specialist • Lead

At 2 Startups • Full-Time

Sep 2024 to May 2025 8 Months Wrocław Partially remote

Developed software solutions for two startup clients under NDA, covering both logistics and social/media use cases. Designed and implemented scalable and secure applications using Node.js/Nest.js and PostgreSQL, and delivered integrations across services. Worked with AWS and GCP serverless/Firebase, adding observability via OpenTelemetry and CI automation with GitHub Actions.

Node JS

TypeScript

Nest.JS

PostgreSQL

AWS

Docker

GCP

Firebase

OpenTelemetry

GitHub Actionssince 2024

ArangoDB

Lead Technical Specialist • Lead

Covantis • Full-Time

Jan 2021 to Sep 2024 3 Years 8 Months Wrocław Partially remote

Led engineering teams across technical domains for a multi-tenant trading platform, ensuring scalability and maintainability. Participated in product discovery, translated business requirements into engineering plans, and established best practices. Implemented event-driven and layered DDD architecture, mentored engineers, supported hiring, and strengthened collaboration while driving observability improvements using OpenTelemetry and Grafana.

Node JS

TypeScript

Nest.JSsince 2021

React.js

PostgreSQLsince 2021

Redis

Apache Kafka

Docker

Kubernetes

AWSsince 2021

Azure

OpenTelemetrysince 2021

Grafana

WebSockets

Senior Software Engineer / Tech Lead • Lead

InScale • Full-Time

May 2020 to Dec 2020 7 Months Kyiv Partially remote

Worked on a blockchain-based platform focused on transactional security and data integrity, with trading and forecasting functionality. Architected and implemented service components to ensure reliable interaction between distributed parts. Conducted technology research and recommended dependency upgrades and performance improvements to keep the system aligned with modern web practices.

Node JS

TypeScript

Express

gRPC

Redis

Docker

Founder / Lead Technical Specialist • Executive

GoSpime • Cofounder

Jan 2020 to Apr 2020 3 Months Kyiv Partially remote

Founded and led development of a social platform enabling real-time collaboration and project management for user groups. Conducted customer discovery to identify needs and improve the user experience. Implemented hexagonal architecture with DDD principles and built a microservices-based system with loosely coupled components and real-time interaction.

Node JS

JavaScript

TypeScript

GraphQL

Redis

RabbitMQ

Docker

WebSockets

Lead Technical Specialist • Lead

Amadeus IT Group • Full-Time

Dec 2016 to Jul 2019 2 Years 7 Months Kyiv In office

Led an engineering team focused on system and software architecture, microservices design, technical issue resolution, and performance optimization. Established engineering practices including code reviews and testing to reduce defects and improve user experience. Collaborated with product and platform stakeholders to align technical solutions with business goals while mentoring team members and promoting transparent communication.

Node JS

JavaScript

TypeScriptsince 2016

GraphQLsince 2016

Redissince 2016

RabbitMQsince 2016

Dockersince 2016

WebSocketssince 2016

Senior Software Engineer • Senior

Amadeus IT Group • Full-Time

Apr 2012 to Dec 2016 4 Years 8 Months Kyiv In office

Optimized web service APIs and implemented asynchronous data processing to improve responsiveness. Led fault-tolerant design efforts to increase system resilience and scalability. Improved database query performance and supported search performance enhancements, including techniques such as image optimization and lazy loading.

PHP

Symfony

Node JS

JavaScript

MySQL

Nginx

Software Engineer • Middle

Amadeus IT Group • Full-Time

Aug 2008 to Apr 2012 3 Years 8 Months Kyiv In office

Developed search and booking services to improve the customer experience and integrated third-party capabilities. Built admin and client interfaces and implemented robust APIs for external service integration. Optimized database queries and implemented parallel processing and media functionality to improve overall performance.

PHPsince 2008

Symfonysince 2008

Node JSsince 2008

JavaScriptsince 2008

MySQLsince 2008