12/10/2025 updated
100 % available
Full Stack Engineer
Kovel, Ukraine
Only remote
Bachelor's degree in Computer ScienceAbout me
I am a Full Stack Engineer with 7 years of experience building scalable, high quality web applications and backend services. Skilled in creating modern, responsive interfaces using React, Next.js and Flutter, paired with robust server side development in Node.js, Python and .NET Core.
Flutter.NET FrameworkA/B TestingUser Experience (UX)Application Programming Interfaces (APIs)Agile MethodologyArchitectureClient Server ModelsData ModelingData SecurityFinancesSystem MonitorPython (Programming Language)Log AnalysisNode.js
EXPERIENCE
Intobi | Full Stack Engineer | 05/2022 – 11/2025 | Kyiv, Ukraine
• Engineered full cycle web platforms using React, Next.js, Node.js, Python and .NET Core,
delivering applications that consistently maintained less than 200ms response times even during peak usage.
• Made a suite of RESTful APIs supporting user authentication, session tracking and real time data operations, which reduced server overhead by 32% after restructuring routing logic and caching layers.
• Built backend modules in Python for process automation, log parsing and system monitoring,
decreasing manual review hours by approximately 20 hours per month.
• Created secure authentication pipelines with multi layer validation and token management,
improving login success rates by 18% while cutting unauthorized access attempts dramatically.
• Designed and refined over 30+ reusable UI components to maintain a consistent design
language across multiple projects, reducing frontend development time by nearly 45%.
• Improved database performance by optimizing SQL queries, applying indexing strategies and
restructuring data models, cutting some API wait times from 1.2 seconds to under 500ms.
• Guided the transition from a monolithic backend into a modular architecture, enabling
independent service deployments and reducing downtime by over 60%.
• Collaborated directly with project owners to translate feature requests into structured technical plans, producing roadmaps that shortened development cycles by 1–2 weeks per release.
• Integrated third party APIs and internal services, ensuring reliable data flow for payments,
logging and analytics without compromising performance.
• Participated in Agile planning and sprint execution, consistently delivering tasks ahead of
deadlines and helping maintain steady development momentum across distributed teams.
Wroclaw | Frontend Engineer | 07/2019 – 04/2022 | Wroclaw, Poland
• Created dynamic, responsive and cross platform interfaces using React.js, Next.js and Flutter,
improving frontend performance by 42%.
• Merged RESTful APIs and .NET backends into modern UI frameworks, ensuring reliable and
secure data communication.
• Planned intuitive dashboards for financial and risk analytics, visualizing complex datasets
through custom charts and real time updates.
• Supported with backend engineers to streamline API requests, achieving smoother client server synchronization.
• Applied UX/UI best practices and conducted A/B testing to enhance user engagement and
reduce bounce rates.
• Performed state management systems using Redux and Context API, improving application
stability across multi page sessions.
• Participated in the full agile development cycle, from wireframes to final deployment, ensuring timely delivery of product milestones.
• Assisted in .NET integration projects, modernizing legacy frontend systems and aligning them
with updated service endpoints.
Experience
Professional experience5 - 10 years
Freelancer since2025
Languages
EnglishFluent
Project history
Engineered full cycle web platforms using React, Next.js, Node.js, Python and .NET Core, built RESTful APIs, created secure authentication pipelines, and optimized database performance while transitioning from monolithic to modular architecture
Created dynamic, responsive interfaces using React.js, Next.js and Flutter, merged RESTful APIs with .NET backends, planned intuitive dashboards for analytics, and participated in full agile development cycle