Sergey Sevastyanov _Email not available. Sign in: https://www.twine.net/signup_ | _Phone details not available. Sign in: https://www.twine.net/signup_ Helsinki, Finland Bratislava, Slovakia Professional Summary Experienced Senior Software Engineer and System/SW Architect with 20+ years of expertise in architecture, design and development of scalable, high-performance software systems across web, mobile, and enterprise platforms. Proven track record of complex projects across multiple technology stacks development, including modern web applications and mobile platforms. Specialized experience in telecom, healthcare industry solutions and AI-powered applications using language models. Strong background in designing scalable architectures, implementing robust APIs, and driving digital transformation initiatives using Agile methodologies and emerging AI technologies. Core Technical Skills Programming Languages & Frameworks • Frontend: JavaScript, TypeScript, React, Node.js • Backend: Java (Spring, Spring Boot, Vaadin), PHP (Yii2, Laravel) • Mobile: Android Development, Cross-platform mobile applications, HTML5+Cordova • General: Python, C/C++ Database & ORM Technologies • Databases: MySQL, PostgreSQL, MongoDB database optimization and design • ORM/Persistence: Hibernate, JPA, EclipseLink • Data Architecture: Database modeling, query optimization, data migration, NoSql design Architecture & Development Practices • System Architecture: Microservices, distributed systems, enterprise architecture • Software Architecture: Design patterns, SOLID principles, architectural decision-making, cloud applications, SaaS, AWS/GCP • API Development: RESTful API design and implementation • Development Methodology: Agile/Scrum, continuous integration/delivery, DevOps & Tools • Version Control: Git, Vcs (advanced branching strategies, code review processes) • CI/CD: Jenkins pipeline development and automation • Containerization: Docker, container orchestration • AI/ML Integration: ChatGPT API implementation, language model integration, prompt engineering • Emerging Technologies: AI/ML system design, intelligent application development…Sergey Sevastyanov _Email not available. Sign in: https://www.twine.net/signup_ | _Phone details not available. Sign in: https://www.twine.net/signup_ Helsinki, Finland Bratislava, Slovakia Professional Summary Experienced Senior Software Engineer and System/SW Architect with 20+ years of expertise in architecture, design and development of scalable, high-performance software systems across web, mobile, and enterprise platforms. Proven track record of complex projects across multiple technology stacks development, including modern web applications and mobile platforms. Specialized experience in telecom, healthcare industry solutions and AI-powered applications using language models. Strong background in designing scalable architectures, implementing robust APIs, and driving digital transformation initiatives using Agile methodologies and emerging AI technologies. Core Technical Skills Programming Languages & Frameworks • Frontend: JavaScript, TypeScript, React, Node.js • Backend: Java (Spring, Spring Boot, Vaadin), PHP (Yii2, Laravel) • Mobile: Android Development, Cross-platform mobile applications, HTML5+Cordova • General: Python, C/C++ Database & ORM Technologies • Databases: MySQL, PostgreSQL, MongoDB database optimization and design • ORM/Persistence: Hibernate, JPA, EclipseLink • Data Architecture: Database modeling, query optimization, data migration, NoSql design Architecture & Development Practices • System Architecture: Microservices, distributed systems, enterprise architecture • Software Architecture: Design patterns, SOLID principles, architectural decision-making, cloud applications, SaaS, AWS/GCP • API Development: RESTful API design and implementation • Development Methodology: Agile/Scrum, continuous integration/delivery, DevOps & Tools • Version Control: Git, Vcs (advanced branching strategies, code review processes) • CI/CD: Jenkins pipeline development and automation • Containerization: Docker, container orchestration • AI/ML Integration: ChatGPT API implementation, language model integration, prompt engineering • Emerging Technologies: AI/ML system design, intelligent application developmentWWWW…