Hire the Best Blazor Developers
in the Dominican Republic

Hi! I’m Domingo Ruiz a backend-first engineer with 4+ years building and maintaining REST APIs and microservices in corporate/regulated environments, including recent contractor work with AmTrust North America (USA). I specialize in designing production-ready backend systems with .NET and Java microservices (Quarkus/Spring Boot), API security (OAuth2/JWT), and SQL performance tuning. I can also support UI integration when needed using ASP.NET MVC, Blazor, and React (API consumption and backend integration). What I deliver: Backend APIs with .NET 8 / ASP.NET Core (clean architecture, SOLID, maintainable code) Java microservices with Quarkus / Spring Boot (REST endpoints, validation, documentation) REST API design with JSON/XML, OpenAPI/Swagger, and clear contracts SQL performance and troubleshooting (query optimization, indexing, slow endpoint analysis) Security and auth patterns (OAuth2/JWT, Keycloak) Testing and quality (xUnit, JUnit/Mockito), CI/CD, Docker, basic Kubernetes exposure Production/staging support, debugging, and collaboration with distributed teams If you share your goal (new API, modernization, performance, integration, stabilization), I’ll propose a clear plan and ship in small, reliable iterations with frequent communication.

I architect and build production-grade Web3 platforms, decentralized applications (dApps), and hybrid on-chain/off-chain systems. With deep expertise in Node.js backend engineering and smart contract integration, I help startups and enterprises launch secure, scalable blockchain solutions. Core Web3 & Blockchain Expertise: Smart contract integration (Ethereum, BSC, Polygon) using ethers.js and web3.js Wallet connection, transaction signing, and gas management On-chain event listening & off-chain data synchronization Token payments (ERC-20, ERC-721, native coins) and automated routing Building custom indexers and real-time blockchain listeners DeFi primitives: swaps, staking, liquidity pools (integration layer) Node.js Backend (Senior Level): NestJS, Express, Fastify – REST and GraphQL APIs Microservices architecture with event-driven patterns (RabbitMQ, Redis) TypeScript – strictly typed, maintainable codebases PostgreSQL, MongoDB, Redis for hybrid persistence Bull/Agenda for job queues and background workers Also Experienced In (Legacy / Enterprise): Custom admin dashboards (React, Vue + Quasar) Inventory, rental management, payment integrations Role-based access control (RBAC) systems Business process automation (n8n, Node.js scripts) Cloud deployment: Google Cloud, Azure, Docker Why work with me? I combine Web3 innovation with battle-tested backend engineering. Unlike pure blockchain developers, I understand how to build reliable off-chain systems that interact safely with smart contracts. I handle double-spending risks, transaction retries, and state reconciliation between blockchains and databases. I deliver clean, documented, and tested code. Let's turn your Web3 idea into a working product.

Hello , I'm Emmanuel Cuevas a young developer who has two years of experience in OOP programming. with C#, My day to day responsibilities are the creation of APIS, database modeling, Provide technical support for web, upgrading, configuring and debugging existing systems. I consider myself an honest and integral person, focused on the constant growth of my knowledge enjoying while doing it. It would be a pleasure to help you out. Let's Talk!!