Олег

Oleg Bartnichuk
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Senior Backend Engineer

Senior Backend Engineer with 9 years of experience in building and optimizing web applications. Focused
on backend architecture, performance, and scalable solutions. Contributing to system design, code
quality, and development processes. Leverages AI-assisted tools to improve productivity and delivery
speed. Interested in growing into a Lead role and driving engineering best practices.

WORK EXPERIENCE

Apart 03/2026 - Present
Apart is a SaaS CRM platform designed for real estate agencies. It helps agencies manage client
databases, property listings, and sales funnels, while providing analytics to improve team performance
and conversion rates.
Founder & Lead Developer Kyiv, Ukraine
Built a SaaS CRM platform for real estate agencies from scratch, taking full ownership of the product -
from architecture and development to deployment and customer support. Designed and developed core
features including client and property management, sales funnels, and an analytics dashboard. Launched
the product, acquired real paying customers, and established a monetization model within the first year.
Binotel 08/2023 - 03/2026
Senior Backend Engineer Kyiv, Ukraine

• Optimized application performance, reducing page load time from several seconds to milliseconds,
significantly improving user experience
• Refactored legacy codebase, reducing the number of production bugs and improving system
maintainability
• Designed and developed a financial module from scratch, ensuring reliability and scalability of core
business processes
• Implemented a centralized logging system, improving monitoring and enabling faster issue detection
and resolution in production
• Contributed to the system architecture transformation by participating in the transition from legacy
code to Domain-Driven Design (DDD)
• Conducted internal workshops and training sessions on code quality and code organization, improving
engineering practices across the development team
• Managed production releases, ensuring stable deployments and minimizing downtime
TopDevs 11/2021 - 03/2023
Fullstack Developer Zaporozhye, Ukraine
• Took full ownership of the product development, leading both backend and frontend implementation
• Developed and maintained a streaming platform, ensuring system stability and continuous feature
delivery
• Identified and resolved critical issues with video streaming reliability, significantly improving user
experience
• Stabilized an existing application with frequent streaming interruptions, transforming it into a reliable
production system
• Collaborated with a product manager and QA engineer in a small cross-functional team to deliver
high-quality releases
• Contributed to user growth by improving platform stability and overall product quality
• Performed regular production deployments, ensuring smooth and consistent delivery of updates
Face IT 09/2018 - 09/2021
Fullstack Developer Zaporozhye, Ukraine
Worked across multiple projects in small cross-functional teams (2–7 people), covering the full
development lifecycle from presales to delivery and support.

• Conducted client interviews and requirements gathering to define project scope
• Estimated incoming projects and proposed suitable tech stacks based on business needs
• Developed and delivered features across diverse projects with varying technologies
• Performed testing and ongoing maintenance/support of delivered solutions
• Served as a direct point of contact with clients throughout the project lifecycle
Zengineers 03/2017 - 09/2018
First professional role, where I grew from Junior to Middle level. Started with CMS-based development and
progressively moved towards full backend development with Laravel.
Backend Developer Zaporozhye, Ukraine

• Developed plugins and custom components for CMS platforms
• Built applications from scratch using pure PHP
• Adopted Laravel and transitioned to more complex backend solutions

EDUCATION

Programming
Step IT Academy 01/2006 - 01/2008

SKILLS

• Key Skills: API ​Development, Application ​Architecture, Containerization, Database ​Management,
Leadership ​and ​Mentorship, Performance ​Optimization, Security ​Best ​Practices, Testing ​and ​Debugging,
Version ​Control ​(​Git)​

• Languages: English ​(​intermediate)​, Ukrainian ​(​native)​
• Technologies: Apache, AWS, Bootstrap, Composer, CSS, DDD, Design ​Patterns, DigitalOcean, Docker, Git,
JavaScript, JIRA, Laravel, Linux, MacOS, Memcached, MVC, MySQL, Nginx, NPM, Nuxt.​js, OOP, PHP, Redis,
Trello, Vue.​js, Vuetify, Yii