Description

👋 Hi there! I'm a backend developer with solid experience building scalable, high-performance server-side applications for small and mid-sized businesses.

I specialize in Java and the Spring ecosystem (Boot, MVC, Security), and have a strong focus on writing clean, maintainable, and testable code. Whether you're launching a new product, optimizing an existing system, or integrating complex APIs - I can help.

My process includes full-cycle backend development: from system architecture and database design to deployment and ongoing maintenance. I believe clear and consistent communication is essential for successful collaboration, so I keep stakeholders in the loop every step of the way.

Let’s connect and build something great together!

Languages

English
Native or bilingual
Ukrainian
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Finik.pro (FinTech / Mobile Banking Platforms)
Java Engineer
September 2020 - Today (5 years and 9 months)
Kyiv, Ukraine, 02000
Backend engineer in a fintech product company building mobile banking platforms for offline banks. Works on high-load payment systems with 100K+ dailytransactions, delivering performance-critical features, large-scale integrations and production stability across multiple client projects within a shared core platform. Owned end-to-end backend delivery as the sole engineer, from client scoping and design to production releases. Developed new backend features, APIs and integrations for payment processing, banking services and third-party platforms. Refactored legacy code and critical SQL queries to improve performance under high transactional load. Led complex data migrations and transactional logic changes with strict consistency and reliability requirements. Solved high-load and concurrency-related issues, including transaction handling, query optimization and integration bottlenecks. Enforced test-first delivery where all new APIs entered main branch only with automated test coverage. Increased overall test coverage from 62% to 88%, directly contributing to a 2× reduction in bug detection and fix time. Consistently delivered backend milestones on schedule, improving release predictability and overall deliveryvelocity. Worked with Jenkins-based CI/CD pipelines to manage continuous deliveryfor both hotfixes and full feature releases.
SQL CI/CD Management API REST Java Spring boot
ZenBit Tech (HealthTech
Java Engineer
November 2023 - November 2025 (2 years)
Northampton, UK
Backend engineer supporting healthcare products, including a telemedicine platform with online doctor consultations and payments and a large legacy healthcare system. Acts as the primary backend owner on the core project, handling client communication, delivery and technical execution. Owned end-to-end backend deliveryfor a telemedicine web platform as the sole backend engineer. Designed and implemented APIs for online consultations, payments and healthcare workflows. Led technical decomposition ofclient requirements into implementable user stories and API contracts. Maintained and modernized a large legacy healthcare platform with complex internal business logic. Delegated and supervised tasks fortwojunior developers, providing technical guidance and reviews. Implemented S3-based solutions forfile storage and data handling within AWS infrastructure. Ensured functional stabilitythrough continuous manual verification due to the absence ofautomated tests. Coordinated directly with clients on scope, priorities and deliverytimelines.