Gennadii Khudiakov

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About Me

I am Gennadii Khudiakov, a developer with 12+ years of commercial experience. I specialize in building scalable software solutions, from MVPs to high-load infrastructures with clusters of microservices. My primary expertise lies in Ruby on Rails, but I am equally proficient in JavaScript and Python.

Languages

English:C1
Russian:Native
Ukrainian:B2
Georgian:A1

Contacts

Skills

Development

Languages: Ruby, Crystal, Python, JavaScript
Frontend: React, Vue, Angular, D3.js, Backbone.js
Backend: Ruby on Rails, Django, JavaEE
Database: PostgreSQL, MariaDB, MongoDB
Testing: RSpec, TDD

Infrastructure and Administration

Containerization and Orchestration: Docker, Kubernetes
Message Brokers: Kafka, RabbitMQ
CI/CD: Capistrano, Git-flow, Pipelines

Management

Team Management: Partial management experience with development teams of 2-4 peoples
Workflow Optimization: Git-flow, CI/CD pipelines, testing stages
Architectural Decisions: Designing scalable solutions and integrations

Design Patterns and Methodologies

SOLID Principles
Domain-Driven Design (DDD)
Agile Development
BPMN (Process Modeling)

Soft Skills

Problem-Solving
Cross-functional Team Collaboration
Adaptability to New Technologies

Work Experience

Crystal Developer

2022 – 2024

Server-Side Binary Applications: Designed and implemented high-performance server-side binaries for DAST, improving system scalability and efficiency.
Code Refactoring: Enhanced maintainability and reliability by applying SOLID principles and increasing test coverage by 30%.

Technologies: Crystal Lang, Docker, Kubernetes

Ruby on Rails Developer

2016 – 2025

Accounting Software: Built full-stack solutions and automated workflows, streamlining client operations. Designed and implemented key product feature.
Scalable Infrastructure: Designed and implemented the architecture and infrastructure for BP Pulse, a large-scale project aimed at facilitating the transition to electric vehicles. Contributed to the overall system design and developed several key microservices, supporting thousands of daily users.
Mobile Applications: Refactored the backend of a mobile app at the MVP stage, resolving significant technical debt that had blocked further development due to code complexity. Applied domain-driven design (DDD) and SOLID principles, introduced comprehensive test coverage, and optimized backend performance, unlocking development, enhancing speed, and improving application stability.
Analytics Tools: Built internal services for Yandex.Taxi, optimized performance, and reduced query load by 35%.
Content Management Systems: Developed a CMS for Disney.ru, including dedicated portals for games and radio. Redesigned the data storage and delivery system, reducing query response times by half and enhancing user engagement.

Technologies: Ruby on Rails, PostgreSQL, MongoDB, React, Vue, Kubernetes, Docker, AngularJS

Java Developer

2013 – 2015

Risk Management Solutions: Created tools for banks, reducing operational risks through automation and process optimization.
BPMN-Based Web Services: Designed and deployed enterprise-level services, improving process automation for Deuche Telecom.
Enterprise Backend Solutions: Delivered stable and scalable backend systems using Java Servlets, Maven, and Spring MVC.

Technologies: JavaEE, Spring MVC, Hibernate, BPMN, PostgreSQL

.NET Developer

2012 – 2013

Desktop Applications: Developed desktop applications with advanced browser-like interfaces, enabling user customization and scripting integration with Google V8.

Technologies: C++, C#, Google V8