Hire the Best Microsite Developers

If your Shopify, HubSpot CMS, or WordPress site is slow, hard to update, buggy, or too dependent on developers, I can help you fix the real problem without adding more technical mess. I work with agencies, ecommerce brands, and marketing teams that need reliable development beyond basic content edits: clean implementation, troubleshooting, performance improvements, reusable modules, flexible templates, and CMS/ecommerce structures their team can actually manage. I bring 13+ years of hands-on web development experience and 8,800+ hours on Upwork across Shopify, HubSpot CMS, WordPress, and WooCommerce projects for US-based agencies and ecommerce brands. Common projects I can help with: - Shopify theme improvements, custom sections, templates, product page updates, metafields/metaobjects, and product-related functionality - HubSpot CMS modules, HubL/HubDB components, landing pages, blog/resource templates, and dynamic front-end builds - WordPress and WooCommerce fixes, custom implementation, reusable content components, and theme/plugin adjustments - Performance improvements, Core Web Vitals cleanup, image/media optimization, and front-end technical fixes - Technical SEO implementation across templates, content structure, metadata, schema, and internal linking support - Debugging complex layout, responsive, UI, JavaScript, Liquid, HubL, PHP, and CSS issues - Ongoing support for launches, site updates, production fixes, and improvements inside existing codebases I’m used to working inside active client projects, existing codebases, and fast-moving environments where quality, clarity, and reliability matter. I can jump into a project, identify what needs to be fixed or improved, and move it forward efficiently. I also use AI-assisted workflows where appropriate to speed up research, troubleshooting, and implementation, while keeping quality control and technical decisions grounded in hands-on development experience. If you’re looking for a developer who can contribute quickly and solve real technical problems across Shopify, HubSpot, and WordPress, let’s talk.

Hi! I'm Darío Alessandro Plaza León, a dedicated software developer with a strong passion for technology and continuous learning. My commitment to honesty and a genuine desire to assist others sets me apart, both in professional and personal settings. I approach every project with enthusiasm, always striving to find the best solution. If you’re looking for someone who brings not only technical expertise but also a 𝗽𝗼𝘀𝗶𝘁𝗶𝘃𝗲 𝗮𝗻𝗱 𝗰𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝘃𝗲 𝗮𝘁𝘁𝗶𝘁𝘂𝗱𝗲, I’m ready to help bring your ideas to life. I specialize in backend development with Java (Spring Boot), and build full-stack apps using modern frameworks like React. I’m also open and capable of working across different platforms — 𝘄𝗲𝗯, 𝗱𝗲𝘀𝗸𝘁𝗼𝗽 𝗮𝗻𝗱 𝗺𝗼𝗯𝗶𝗹𝗲 — using modern tools and rapid learning when needed. I’ve worked across various industries: booking platforms, internal tools, SaaS apps and automation systems, always focused on building clean, scalable and high-impact software. 𝗪𝗛𝗔𝗧 𝗠𝗔𝗞𝗘𝗦 𝗠𝗘 𝗗𝗜𝗙𝗙𝗘𝗥𝗘𝗡𝗧 - Full-time availability for fast development and real progress - Open to any platform or framework – I learn fast and deliver fast - Strong backend fundamentals with secure and scalable design - Honest, proactive, and focused on client success I’m ready to bring your project to life.

Upwork: 100% Job Success Score with positive client feedback. I am a senior full-stack engineer with 10 years of professional experience. I build complete web applications, business websites, and backend systems with a strong focus on reliability, clean structure, and maintainable code. I recently built and deployed a complete WordPress website for a local service business, including a responsive homepage, service pages, pricing page, reviews page, blog layout, FAQ section, contact flow, SSL setup, and basic speed/SEO optimization. This project demonstrates my ability to build a real business website from structure to deployment, not just edit a template. My core backend experience is Java and Spring Boot. I have engineered and maintained production systems for banking clients, working on clean data handling, SQL optimization, REST APIs, and reliable, well-tested business logic. I also build backends with Node.js and work comfortably with MySQL, PostgreSQL, MongoDB, and API integrations. On the frontend, I build production interfaces with React, Next.js, and TypeScript. Because I work across the full stack, I can take a feature from database to API to UI, or step into an existing codebase and quickly understand what needs to be fixed or improved. I have also built AI agent systems, including AgentRoute Studio, an open-source goal-driven agent platform with verification layers, multi-model routing, risk gates, and budget monitoring. If you are integrating LLM features and want them to be reliable rather than just a quick demo, I can help with that too. I am based in China and work comfortably with English and Japanese-speaking clients in writing. I spent years collaborating with Japanese teams, so I understand the importance of clear updates, careful implementation, and dependable follow-through. I care about clear communication, realistic estimates, and delivering work that I would be comfortable maintaining myself. Tell me what you are building, and I will tell you honestly how I would approach it and whether I am the right fit.

I help startups and growing businesses stabilise, improve, and ship digital products — especially platforms built with AI tools, low-code workflows, and vibe-coded apps on platforms like Replit. If you have a product that was built fast and now needs to be fixed, cleaned up, extended, or made reliable for real users, that’s where I come in. I work with founders and teams to turn fragile MVPs into usable, scalable products by improving UX, fixing broken flows, refining the product strategy, and helping engineering move faster with less chaos. What I can help you with • Stabilising platforms built on Replit, AI app builders, low-code tools, and vibe-coded workflows • Improving broken or confusing user journeys • Turning rough prototypes into production-ready product experiences • Designing and shipping SaaS platforms, internal tools, dashboards, and client-facing apps • Adding AI features that are actually useful to users • Scoping MVPs, prioritising features, and reducing product risk • Leading product execution from idea to launch What clients hire me for • Platform rescue: fixing products that were built quickly but are now unstable, messy, or hard to maintain • UX + product improvement: making apps easier to use, clearer, and more likely to convert • Rapid prototyping: building and testing new features quickly before teams overinvest • AI workflow implementation: integrating OpenAI, automation tools, and smart product experiences into existing platforms • Founder support: helping non-technical or overstretched teams make better product decisions My approach I don’t just make screens look better or build random features. I help clients figure out what is breaking, what matters most, and what needs to happen next to make the product more reliable and more valuable. That might mean: • auditing the product and identifying friction points • redesigning key flows • improving onboarding and conversion • cleaning up the product structure • working with developers to implement better solutions • using tools like Replit, Figma, React, Laravel, Supabase, n8n, OpenAI, and payment integrations to move quickly Types of projects I’m a strong fit for • Startups with an MVP that feels unstable or unfinished • Founders who built fast with AI tools and now need product structure • Teams that need a UX/product partner who also understands implementation • Businesses adding AI features, automation, or new digital services • Companies that need someone to bridge strategy, design, and delivery If your app was built quickly and now needs to be stabilised, improved, or prepared for growth, I can help you get it there.

Senior Full-Stack Architect/Engineer specialist in building scalable SaaS platforms using Node.js, React, Golang and cloud infrastructure and or microserces. I am a constantly updated programmer with 30 years of experience in software development and over 15 years as a software/solutions architect. I can develop/solve applications in 99% of areas or niches. How I can help you: • SaaS platform development • Microserces platform development • Scalable platform development • API development • API Integrations • Event Oriented Architecture • Scalable backend architecture • REST APIs and microservices • Cloud infrastructure and DevOps • System modernization and performance optimization • MVP development for startups • Enterprise-level system architecture • Figma → Software • Systems Web • Ecommerce • Landing Pages • Website • PWA • Mobile Aplication ( Android, IOS) • Server Configuration • Software Achitecture • Cloud Architecture • TDD • DDD • Clean Architecture Technologies Backend: Node.js, NestJS, TypeScript, Java, GoLang Frontend: React, Next.js, HTMX, Html, CSS Mern Stack, Infrastructure: Docker, Nginx, Certbot, PM2, Kubernetes, CI/CD, AWS - Amazon Web Services, Google Cloud, Microsoft Azure, Digital Ocean, Hetzner, Linux Automation: DevOps, Ansible , Terraform, Prometheus, Grafana , traefik Architecture: Microservices, Event-Driven Architecture, DDD, High Availability Systems, Distributed Systems I am a native Brazilian Portuguese speaker. I can handle technical communication in English, including reviewing and translating audio and video materials with the support of AI tools, so feel free to send them if helpful. I also understand Spanish very well. Portuguese is my preferred language for meetings. Experience I have worked on large-scale systems, including banking platforms, enterprise systems, streaming platforms, large e-commerce sites, and SaaS products used by thousands of users. I also have experience designing high-availability systems from scratch to deployment, building microservices architectures, and helping companies scale their infrastructure. Technical career leader. I already have led multiple teams on simultaneous projects. And in a large consulting and outsourcing company I led 3000 programmers in different teams for clients in the banking sector. If you are creating a startup, a SaaS platform, or an enterprise system, I can help you design the architecture and implement the solution. If you want to be sure your candidate is the right one and technically suitable for your project, I also conduct technical interviews to evaluate software engineers. I help companies quickly validate candidates and determine if they are the right fit for the role in a structured 30-minute technical conversation. I can tell you which of your candidates is the best for your project. I also help refine your project description. Let's talk about your project.

WordPress development, built around custom websites, WooCommerce, LMS platforms, and clean integrations that actually work in production. 𝙈𝙮 𝙜𝙤𝙖𝙡? 𝘽𝙪𝙞𝙡𝙙 𝙖 𝙒𝙤𝙧𝙙𝙋𝙧𝙚𝙨𝙨 𝙨𝙮𝙨𝙩𝙚𝙢 𝙩𝙝𝙖𝙩 𝙧𝙪𝙣𝙨 𝙨𝙢𝙤𝙤𝙩𝙝𝙡𝙮, 𝙨𝙘𝙖𝙡𝙚𝙨, 𝙖𝙣𝙙 𝙨𝙪𝙥𝙥𝙤𝙧𝙩𝙨 𝙮𝙤𝙪𝙧 𝙗𝙪𝙨𝙞𝙣𝙚𝙨𝙨, not just "a website". I've spent 14+ years working only with WordPress, delivering 300+ WordPress websites, from simple marketing sites to large-scale WordPress platforms with WooCommerce, subscriptions, LMS systems, and custom API integrations. Most of my work comes from clients who already have a WordPress site - and need a WordPress expert who can: Rebuild it properly, Migrate it safely, Integrate payments Or fix what previous developers broke 𝙒𝙝𝙖𝙩 𝙄 𝘼𝙘𝙩𝙪𝙖𝙡𝙡𝙮 𝘿𝙤: 𝟭. Custom WordPress Development: I build custom WordPress websites from scratch, with a clean structure, a scalable setup, and no unnecessary bloat. 𝟮. WordPress Design → Development (Figma to WordPress): I turn Figma designs into pixel-accurate WordPress websites using Elementor, Gutenberg, or custom templates. 𝟯. WooCommerce Development: WooCommerce setup, customization, product logic, stock management, and custom checkout flows built for real businesses. 𝟰. Membership & LMS Platforms: WordPress membership systems and LMS platforms using LearnDash, MemberPress, or WooCommerce subscriptions. 𝟱. WordPress Migration & Rebuilds: Large WordPress migrations, platform transfers, and website rebuilds without data loss or downtime. 𝟲. API & 3rd-Party Integrations: Stripe integration, CRM connections, automation with Zapier or Make, and custom API workflows inside WordPress. 𝟳. Performance & Stability: WordPress performance optimization, database cleanup, image optimization, and long-term site stability. 𝟴. Ongoing WordPress Maintenance: Updates, security, backups, monitoring, and ongoing support for WordPress websites that must stay online. 𝙒𝙝𝙮 𝙏𝙝𝙞𝙨 𝙒𝙤𝙧𝙠𝙨 𝟭. I work only with WordPress, and I have mastered it 𝟮. I understand business logic, not just layouts 𝟯. I've handled large WordPress sites, migrations, and payment systems 𝟰. Clean communication, realistic timelines, no disappearing 𝟱. Long-term clients, repeat work, and ongoing contracts 𝙍𝙚𝙖𝙘𝙝 𝙤𝙪𝙩 – 𝙩𝙝𝙚 𝙗𝙚𝙨𝙩 𝙬𝙖𝙮 𝙩𝙤 𝙜𝙚𝙩 𝙨𝙩𝙖𝙧𝙩𝙚𝙙 𝙞𝙨 𝙬𝙞𝙩𝙝 𝙖 𝙛𝙧𝙚𝙚 𝙘𝙖𝙡𝙡.