Denys Kulyk Email & Phone Number

Warsaw, Mazowieckie, Poland

Kyiv, Kyiv City, Ukraine

Leading development in Fintech, Social, HealthTech, and E-commerce, utilizing Ruby, Rails, and VueJS to deliver high-quality solutions while fostering team growth.Key Responsibilities and Impact:* Technical Leadership: - Developed scalable applications using Ruby, Rails, VueJS, REST API, GraphQL, GCP, Firebase, AWS, and Docker.* Database Management: - Ensured data integrity and performance with Postgresql, MySQL, and Redis.Cloud Solutions: - Managed cloud platforms (GCP, Firebase, AWS), reducing infrastructure costs by 20%.Project Contributions: - Drove success in diverse projects, aligning with team and client goals.* Team Development: - Enhanced team productivity and skills.* Client Collaboration: - Translated client requirements into effective technical solutions.

Kyiv, Kyiv City, Ukraine

Contributed to various projects across different architectural styles and team dynamics, collaborating with both large and small agile teams.Key Responsibilities and Impact:* Multidisciplinary Collaboration: - Gathered requirements, refined specifications, and ensured successful delivery of software solutions.* Client Communication: - Clarified project needs with clients and product owners, ensuring alignment with business objectives.* Sales and Estimations: - Provided technical insights and assisted in project scoping, ensuring feasible timelines and deliverables.* Software Development: - Designed, developed, tested, and maintained high-performance, responsive software applications.* Architectural Contributions: - Influenced architectural decisions, focusing on scalable and maintainable design.* Code Quality: - Engaged in continuous code reviews to uphold code quality and optimize performance.* Mentorship: - Mentored junior team members, fostering continuous learning and improvement.

Developed custom software solutions for internal business needs using Ruby on Rails, and implemented automation processes with Python and AWS Lambda.Key Responsibilities and Impact:* Developed CRM systems for internal use, enhancing business processes.* Utilized AWS infrastructure and Lambda functions to automate processes, improving efficiency.* Integrated third-party services to extend functionality.* Streamlined workflows and enhanced operational efficiency.

Contributed to a large project with a microservices architecture, focusing on admin panel development and various integrations.Key Responsibilities and Impact:* Developed and enhanced the admin panel* Fixed bugs and implemented new features.* Ensured high-quality code by writing tests and conducting code reviews.

Provided IT instruction and administered Windows Server environments, focusing on advanced Active Directory services and networking fundamentals.Key Responsibilities and Impact:* Taught IT concepts and practical skills.* Installed, configured, and administered Windows Server 2008/2012 R2.* Advanced administration of Active Directory Domain Services (ADDS, ADFS, ADRMS, SCCM NPS, DirectAccess, VPN, RADIUS Server, EFS, Bitlocker).* Networking fundamentals, OSI model, TCP/IP model, subnetting, and supernetting, IPv4/IPv6.* Experience in server virtualization using HYPER-V and VMWare ESXi.