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S
Sotiris Yiallourides
Developer
Cardiff, United Kingdom
About
With over 6 years of experience, I help developers and teams build and improve real-world applications, specializing in fintech, blockchain, and Stripe integrations. I troubleshoot issues, optimize performance, and ensure applications are secure and scalable. I’m happy to have a catch-up beforehand to understand your needs before we move forward, ensuring the best approach for your project.
Skills
React
Next.js
Java
TypeScript
JavaScript
Spring Boot
PostgreSQL
MySQL
MongoDB
AWS
Azure
Solidity
Smart Contracts
Services
Secure & Scalable Backend
I help build secure, scalable, and high-performance backend systems that keep your applications running smoothly under any load. From architecture review to performance optimization and bug resolution, I provide hands-on guidance to ensure reliability, maintainability, and long-term growth.
$199003 days delivery
Smooth & Scalable Frontend
I assist in creating responsive, user-friendly frontends that deliver an intuitive and seamless experience. I troubleshoot UI issues, optimize performance, and implement best practices to ensure your application is secure, maintainable, and scalable for future growth.
$189003 days delivery
Next-Gen Blockchain App Support
I provide hands-on support for building secure and scalable blockchain applications. From smart contract review to decentralized workflow optimization, I help teams implement reliable, efficient, and secure blockchain solutions that can safely scale as adoption grows.
$289005 days delivery
Seamless Payment & API Integrations
I help integrate third-party services like Stripe and other APIs into your applications efficiently and securely. I troubleshoot integration challenges, optimize workflows, and ensure smooth, scalable, and reliable data flow between systems, so your app functions flawlessly as it grows.
$149002 days delivery