MICROSERVICES ARCHITECTURE FOR BUILDING A CRYPTO FREELANCE EXCHANGE
DOI:
https://doi.org/10.35546/kntu2078-4481.2025.3.2.5Keywords:
web application, software architecture, microservices, freelance, blockchain, IoTAbstract
The article proposes an architectural solution for building a next-generation crypto-freelance exchange that combines the advantages of a microservices approach with blockchain technologies. The study highlights the relevance of the topic, driven by the shortcomings of centralized platforms such as high service fees, payment delays, and low trust between users. The main goal is to design a scalable, secure, and transparent architecture capable of ensuring effective interaction between clients and freelancers through the integration of smart contracts.The system architecture is developed on the principles of domain-driven design and presented as a modular environment with independent services for authentication, order management, transaction processing, file handling, and analytics.UML and C4 diagrams are employed to visualize the system’s logic and inter-service interactions. Communication between microservices is established via the gRPC protocol, while external APIs operate over HTTPS. A multi-layered data storage approach is applied: PostgreSQL is used for critical transactional data, MongoDB for dynamic objects, and Redis for caching and real-time processing.Special attention is given to security issues. Protection mechanisms against SQL injections, XSS attacks, DDoS loads, and phishing threats have been implemented. Blockchain wallet integration is safeguarded through transaction signing algorithms and private key encryption. Smart contracts ensure automatic fulfillment of agreements, transparent financial operations, and reduced fraud risks.The research results confirm the effectiveness of combining microservices architecture with blockchain in creating a modern freelance platform. The proposed solution demonstrates high scalability, fault tolerance, and the potential for further integration with AI services and other external tools. The conclusions emphasize that such a platform can serve as a foundation for decentralized freelance services, DeFi projects, and innovative economic models, where transparency, trust, and automation are the defining principles.
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