Upwork home
Sign up
Secondary
Yurii K. Status: Offline
Krakow, Poland
100% Job Success
Rising Talent

Senior Full-Stack Engineer | React Angular | Java Python Spring

I am a Senior Full-Stack Engineer with over 8 years of experience in developing high-performance, secure, and scalable web applications, primarily in the financial technology (fintech) and AI-driven platforms sectors. My expertise spans from crafting interactive user interfaces to building robust backend services, and deploying applications in cloud environments. I bridge the gap between frontend and backend development to create seamless, end-to-end solutions that meet both business and technical requirements. 🖥️ Frontend Development I specialize in creating dynamic, responsive, and user-friendly interfaces using React, Angular, TypeScript, and JavaScript. My experience includes building real-time financial dashboards, investment tools, and responsive SPAs that handle large data sets while ensuring smooth performance. I focus on modular, reusable component-based architectures that are easy to maintain and scale. I also ensure that all applications are optimized for mobile devices and offer high accessibility and user-friendliness. 💻 Backend & Microservices On the backend, I develop scalable microservices using Java, Spring Boot, Python, and Spring Cloud. I’m skilled in building robust APIs (both REST and SOAP) and integrating them with complex systems. My expertise includes implementing secure authentication with JWT and OAuth2, crucial for protecting sensitive financial data. In fintech, I’ve worked extensively with ISO 20022, ensuring seamless communication between financial institutions. 🗃️ Databases & Cloud Infrastructure I have hands-on experience with both SQL (PostgreSQL, MySQL, MSSQL) and NoSQL databases (MongoDB, AWS DynamoDB), designing optimized schemas for performance under heavy data loads. I deploy applications in AWS, Azure, and GCP, using tools like Docker, Jenkins, and CI/CD pipelines to ensure efficient and secure deployment. This ensures smooth operation in a cloud-native, scalable environment. 🏦 Fintech & AI Expertise I am passionate about fintech applications, particularly payment gateways, investment tools, and KYC/AML systems. I integrate AI solutions into web applications to provide predictive analytics, personalization, and smart search capabilities, leveraging tools like OpenAI API and TensorFlow.js. 🤝 Soft Skills & Collaboration I am a proactive team player with strong communication skills, and I have worked in Agile/Scrum environments where collaboration and fast iterations are essential. I believe in clean code and follow best practices to ensure that the codebase remains maintainable, testable, and scalable. I understand the importance of delivering projects on time and within budget, and I am adept at collaborating with cross-functional teams, including designers, product managers, and backend developers, to bring projects to life. 🚀 Let’s build something great together! If you’re looking for a full-stack developer with a strong foundation in both fintech and AI, I’m ready to help you turn your project into a secure, scalable, and user-friendly solution. Reach out today, and let’s discuss your goals!
Work history
Yurii K. has more jobs. Create an account to review them
Skills

Skills

  • Java
  • Spring Framework
  • React
  • Angular
  • TypeScript
  • Amazon Web Services
  • Microsoft Azure
  • MySQL
  • MongoDB
  • Python
  • Spring Boot
  • REST API
  • SQL
  • AI Development
  • Machine Learning

Browse similar freelancers