Hire the Best Kubernetes 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'm Melanie, a Software Engineering student with 1+ year of professional experience at Tixena, where I work on outsourcing projects for companies including Prodoctivity and Webpsys Latam. Alongside this, I take on freelance projects via Upwork and personal initiatives. I have experience in Rust-based backend development, game development through indie projects developed in my free time, and WebAssembly (WASM). I work with Rust + Tokio to build asynchronous backends and APIs, use Protobuf for efficient service communication, and develop AI microservices. I also build websites and web applications and integrate frontend systems with backend services. Technologies/tools I work with include: - Rust (Bevy, Tokio, WASM) - TS/JS - Protobuf - Microservices & AI services - Node.js / APIs - Git & GitHub/BitBucket - Kubernetes / Docker I’m focused on results and code quality. 🦀 Rust Lover 4ever 🦀

Leveraging over two decades of experience in Technology and High-Frequency Trading (HFT), I've worked in premier institutions including Aviva, FTSE, Merrill Lynch, Bank of New York, Kingdon Capital, Syneos Health Services, HSBC, Dresdner, Royal Bank Of Canada, Mitsubishi, Credit Suisse, and Insch Kintore. I bring to the table proficiency in: Trading Systems & Market Infrastructure ✅ HFT & Market Making: Ultra-low-latency systems, FPGA acceleration, co-location (NY4/TY3), FIX/ITCH/OUCH. ✅ Forex ECNs: Deep expertise in Cboe FX, EBS, and institutional FX market microstructure. ✅ Hedge Fund Infrastructure: OMS/PMS, real-time risk engines, portfolio analytics, multi-asset connectivity. ✅ Prediction Markets: Oracle integration, automated settlement, and market resolution protocols. ✅ Trading Expertise: Order book microstructure, AMM strategies, CEX dynamics, ICT/SMC (MT5). Exchanges, Blockchain & Tokenization ✅ Crypto Exchange: Matching engines, custody integration, KYC/AML, fiat on/off ramps. ✅ DeFi & DEX: AMMs, liquidity pools, cross-chain bridges, decentralized trading infrastructure. ✅ Blockchain & L1/L2: Custom chains, consensus mechanisms, rollups, validator infrastructure. ✅ Tokenization & RWA: Security tokens, real-world asset tokenization, regulatory frameworks. ✅ Crypto & Web3: Solana, Ethereum, QuickNode, Jupiter, Fireblocks. AI, Quant & Advanced Modelling ✅ AI/ML for Finance: Quant pipelines, alpha signal generation, feature engineering, and modeling across Forex and crypto markets. ✅ LLM Systems: LangChain, LangGraph, OpenAI MCP, agentic workflows, observability, and data reconciliation. ✅ Frameworks: PyTorch, TensorFlow, Transformers (low-rank, factorized), LLMs (GPT, BERT, PaLM). ✅ Advanced Methods: Deep Q-Learning, Reinforcement Kalman Filters, Mean Field Games. Engineering, Data & Low-Latency Stack ✅ Languages & Systems: C, C++, C#, .NET, Python, Rust, Go, TypeScript, Solidity, CUDA, Verilog/VHDL. ✅ Data & BI: SQL, MDX, XML, XBRL, SSAS, Power BI, star schema design. ✅ Real-Time Data: Kdb+/q, in-memory columnar streaming systems. ✅ Low-Latency Tech: FPGAs, SmartNICs, FIX, CME, NASDAQ, Trading Technologies, QuantConnect. Cloud, DevOps & Platforms ✅ Containerization: Docker, Kubernetes. ✅ Cloud: AWS (ECS, EMR, Glue, Firehose, SageMaker), Azure, Azure ML, DevOps. ✅ Data Platforms: Databricks. ⭐ I pride myself on my stellar reviews and feedback which are a testament to my dedication to excellence and client satisfaction. ⭐ My robust portfolio and strong work history demonstrate the breadth and depth of my expertise.

I'm a Full-Stack Developer with 3+ years of professional experience, specializing in backend architecture, API development, and scalable web applications. I help businesses build robust systems from the ground up — fast, secure, and designed to scale. 🚀 What I Do Best Backend Development (Strong Focus): Node.js, NestJS, Express, TypeScript API-centric architectures, microservices, caching, event-driven systems, Redis messaging, and performance optimization. Full-Stack Web Apps: React, Next.js (v14/v15), Tailwind, reusable UI components, and clean front-end architecture. Databases & System Design: MySQL, PostgreSQL, MongoDB — schema design, query optimization, indexes, migrations, and scalable data models. DevOps & Cloud: Docker, Kubernetes, CI/CD pipelines, distributed systems, backend orchestration, API monitoring, and production-grade deployments. Advanced Architectures: Microservices, distributed storage systems, modular backends, role-based authorization, API caching, and secure communication between services. 🧩 What makes me different? I’ve served as a Technical Backend Leader, managing system designs, tech decisions, and architecture for multiple projects at once. I build clean, stable, and maintainable code focused on long-term scalability — not quick fixes. I improve existing systems by refactoring, reducing technical debt, and boosting performance. I collaborate well in teams (Agile/Scrum), communicate clearly, and take ownership of the full development lifecycle. 🛠 Skills & Technologies Backend: Node.js, NestJS, Express, Fastify,Moleculer.js Frontend: React, Next.js, Vite, Astro,Tailwind Databases: MySQL, PostgreSQL, MongoDB DevOps: Docker, Kubernetes, Microservices, CI/CD Others: Redis, Authentication, API Security, Caching, Webhooks, Role-Based Permissions 🏆 What You Can Expect Working With Me Fast and reliable communication Production-ready code Clear documentation Scalability and performance in mind A developer who thinks like a product engineer, not just a coder

🏆TOP 3% on Upwork 🌟 140+ Successful Projects On Upwork. 🌟 19,000+ Upwork Hours 🌟 10+ years of experience Looking for a versatile full-stack developer who can turn your ideas into reality? I've tackled numerous challenging projects and am eager for new opportunities. My forte lies in API Development (REST), but my expertise spans across various technologies and frameworks. 🔧 What I Bring to the Table: ⭐API Mastery: REST & GraphQL ⭐Single Page Applications: React, Next.js, Angular ⭐Global Clientele: Delivering tailored solutions for businesses worldwide ⭐Detail-Oriented Approach: Accuracy, consistency, and high standards are my top priorities 🔍 Technical Skills: ⭐Languages & Frameworks: Python, TypeScript,Nodejs ⭐Frontend: React.js, Angular (with TypeScript) ⭐Cloud & DevOps: DigitalOcean, GitHub Actions for CI/CD ⭐Databases: PostgreSQL, SQLite, MongoDB, MySQL ⭐Web Servers: Apache, Nginx ⭐APIs & Integrations: SendGrid, Twilio, Stripe, RapidAPI ⭐Containers: Docker, Kubernetes ✅ Why Choose Me? _We may be a great fit if you are thinking the following_ ⭐ I am a Web Developer myself, but I don't have time and I want to outsource my work. ⭐I have a startup, and I want to hire the best ⭐We are an agency, and we want to hire someone who can handle our clients . ⭐I don't know anything about the digital world, I just need business and sales. 🏆Your project deserves the best—let's work together to make it happen! 🚀💡 Next Steps? - Send me an invite for the job, lets's schedule a meeting and if we are a good fit to work together, let's move forward. 📩 Ready to collaborate? Message me and let's and bring your vision to life! 🌐

Senior PHP Developer experienced in Laravel, Symfony and WordPress. I am a developer with primary focus on back-end Web Programming, and also code desktop application as a hobby. Whenever applicable, I tend to build desktop version of Web application I create just for proof of concept. Aside from being a programmer, I have some good experience in System Administration. I started my IT career back in 2011-2012, where I was working as a Windows System Administrator for a small company. Since then, I keep extending my skills in the IT field, from Windows Client Management to Server, Networking, Linux(LPIC, LFCS), the cloud, and System Security(mostly Server and Web Application).