Hire the Best Microservices Developers
in Spain

I build startup-ready web products using React / Next.js / Node.js, from first MVP to scalable production with a strong focus on speed, quality, and maintainability. If you need a senior engineer who can take ownership, translate Figma into a clean UI, ship reliably, and keep your codebase healthy as you iterate, you’re in the right place. What I deliver 🔹Frontend: React + Next.js (SSR/SEO, performance, component systems, pixel-perfect UI) 🔹Backend: Node.js (REST APIs, microservices, integrations, background jobs, event ingestion) 🔹Data: PostgreSQL / MSSQL / MongoDB / Supabase (schema design, migrations, indexing, performance tuning) 🔹Engineering quality: clean architecture, CI/CD, TDD/unit tests where it makes sense, practical docs 🔹AI features & workflows: LLM-powered product features + AI-driven development to accelerate delivery (automation for refactoring/testing/debugging - not “vibe coding”) Why startups hire me 🔹20+ years in software engineering, including senior/tech lead roles, comfortable in fast-moving environments. 🔹Proven delivery in MarTech and Healthcare: built React modules that improved rendering speed and reduced bundle size via code-splitting; shipped Node.js microservices for attribution/event processing and real-time analytics to increase throughput and reduce latency. 🔹Modernization & reliability: migrated legacy systems to Azure, rebuilt backends in Node.js, designed event-driven architectures, and performed security-focused work for regulated domains. I’m based in CET (Valencia, Spain) and regularly collaborate with US & EU teams with overlapping hours. Let’s talk. Share your idea, current stack, and timeline. I’ll propose a pragmatic plan, and we can start with a small milestone (audit, prototype, or one feature) to confirm fit.

Senior Java Software Architect with 15+ years of experience designing, developing, and delivering high-quality enterprise software solutions. Proven expertise building complex systems from scratch, modernizing legacy applications, and untangling long-standing technical issues in mission-critical Java environments. Recognized for reliability, technical depth, and consistent delivery of clean, maintainable, and scalable software. Core Technical Expertise Java & Enterprise Development: Spring Boot, Spring Batch, J2EE, EJB 2.0/2.1, JMS, Java Swing, JSF (PrimeFaces, RichFaces), JBOSS Frontend & App Development: Angular, AngularJS, React, TypeScript, PowerApps Portal & CMS: Liferay 6.2 / 7.0 Backend & Web Technologies: PHP, REST APIs, Microservices Cloud & DevOps: Kubernetes, AWS, CI/CD, containerized architectures Architecture & Design: Distributed systems, performance optimization, legacy modernization, system integration Professional Strengths Architected and implemented full-stack applications from the ground up using best-practice design patterns and modern development standards. Expert at analyzing, stabilizing, and refactoring complex or poorly structured Java applications — often resolving issues that remained unsolved for years. Strong communication and leadership skills, delivering clear solutions and prompt, high-quality results. Highly reliable, self-motivated, and committed to producing accurate and maintainable software aligned with business goals.

I’m a .NET developer with 15+ years of experience building and maintaining production systems, including high-load and legacy-heavy environments. My core stack aligns directly with your requirements: C#, ASP.NET Core (Web API), Entity Framework (Code First), and MS SQL, with practical experience designing scalable backend services and optimizing performance-critical paths. In addition to backend development, I also have strong frontend experience with Angular and TypeScript, building complex SPA applications, integrating REST APIs, and maintaining large-scale enterprise frontend codebases. I’m comfortable working across the full stack and coordinating frontend/backend architecture to keep systems maintainable and scalable. I’ve worked on systems handling large request volumes (up to ~1M requests/day), where I focused on diagnosing bottlenecks (indexes, query plans, inefficient procedures) and improving performance without breaking existing behavior. Most of my work involved real-world constraints: legacy code, evolving business logic, and the need to extend systems cleanly instead of rewriting them. On the cloud side, I have hands-on experience with Azure services and understand how to design distributed systems: REST APIs, inter-service communication, and asynchronous processing patterns. I’m comfortable working with messaging (Service Bus–style patterns), storage, and scalable architectures that fit IoT-like workloads. I follow clean architecture principles, participate actively in code reviews, and work with CI/CD pipelines (Azure DevOps). I also use unit testing tools like xUnit and Moq when it makes sense for system stability and regression protection. What makes me a strong fit for your team: • Strong full-stack experience with both backend (.NET/C#) and frontend (Angular/TypeScript) • Experience working on long-term products and stable teams, not just short freelance engagements • Focus on practical, maintainable solutions rather than overengineering • Ability to work independently and contribute to architecture decisions • Hands-on experience dealing with real production issues, not only greenfield development Technologies that I have used in my projects: Languages: C#, SQL, JavaScript, TypeScript Frontend: Angular 18, NgRX, RxJs, SignalR, HTML, SCSS, Material Backend: .NET Core, ASP.NET Web API, AWS Lambda, Amazon S3, ASP.NET MVC, Docker, RabbitMQ, CosmosDB, Azure DBMS: SQL Server, PostgreSQL, SQLite, Access DB, T-SQL, LINQ, Entity Framework, EF code first, ADO.NET Testing: NUnit, XUnit, MS Test, Moq Cloud: Azure Portal, Azure DevOps Operating Systems: Windows Version Control: GitHub, Bitbucket

Most Elementor designers stop at the drag-and-drop layer. I keep going when the design demands custom code. I'm a WordPress and Elementor designer. Top Rated on Upwork, ranked #1 in Spain for Elementor, top 0.04% worldwide. 91 projects shipped over the past year. What I make: Figma-to-Elementor builds that ship pixel-faithful — no "well, Elementor doesn't quite do that" caveats. Landing pages tuned for conversion, with 90+ Lighthouse on mobile as the baseline. WooCommerce stores that feel premium and check out smoothly. WordPress redesigns where the brand evolves but the SEO and speed don't take a hit. What makes my work hold up: Most Elementor designers stop at the drag-and-drop layer. I keep going. When the design hits Elementor's limits, and on real projects it always does, I write the custom PHP myself rather than tell you the platform can't do it. Performance debugging at the codebase level. Integrations with Stripe, Mailchimp, HubSpot that don't break six months later. That depth comes from five years of software engineering work (Laravel, blockchain infrastructure at Nito-Labs) running parallel to my design career. Most Elementor designers can't say that. You get a designer's eye and an engineer's discipline in the same person. Available now. Fluent English. Fast response. Message me with what you're shipping. Stack: Elementor · WordPress · WooCommerce · Figma · PHP · JavaScript · Stripe · Mailchimp · HubSpot · UI/UX · Custom plugin development · Landing page optimization · Core Web Vitals · Mobile-first design · SEO performance

Senior full-stack developer with 15+ years building scalable .NET APIs and React/Angular applications for production environments. I specialize in backend architecture, high-performance data access, and cloud-ready systems on Azure and AWS. I've led teams of up to 5 developers and ship code using AI-assisted workflows with Claude Code and OpenAI Codex. Clients hire me for projects where the architecture matters — where the system needs to scale, the data layer needs to be fast, and the code needs to still make sense two years from now. I own projects end-to-end: architecture, implementation, deployment, and team coordination. Backend & architecture ASP.NET Core, C#, REST APIs, Clean Architecture, CQRS, async/await patterns, microservices, high-availability design Data layer MS SQL Server, T-SQL, query optimization, EF Core, Dapper, NHibernate, PostgreSQL Frontend React, Angular, Vue.js, TypeScript, JavaScript (ES6+), responsive UIs Cloud & DevOps Azure, AWS, Docker, Kubernetes, CI/CD, containerized deployments Other Python, WPF / WinForms (legacy systems), AI-assisted development with Claude Code and OpenAI Codex What I bring beyond code ✅ 15+ years of production experience across enterprise and startup environments ✅ Team leadership — I've led developers and coordinated cross-functional delivery ✅ Architecture decisions grounded in real tradeoffs, not buzzwords ✅ AI-first workflows that move faster without sacrificing code quality Best fit for ✅ Scaling SaaS products that need backend performance work ✅ New .NET API + React frontend builds with serious architecture requirements ✅ Teams that need a senior developer who can also lead and mentor ✅ Cloud migrations to Azure or AWS Availability: 30+ hours per week, flexible timezones Tell me about your project — stack, scale, and the problem you're solving — and I'll respond within a few hours with a concrete approach.

I help businesses build scalable, secure, and high performance backend systems using Java and Spring Boot. With 7+ years of experience in fintech and high traffic platforms, I’ve designed and delivered systems that process millions of transactions reliably, with a strong focus on performance, maintainability, and real world business impact.