Carlos S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I’m a Senior Software Engineer with 20+ years of software development experience, specializing in backend engineering, AI-powered applications, intelligent automation, and scalable web platforms. I help businesses turn complex technical requirements into reliable software, practical AI solutions, and automated workflows. From designing high-performance APIs and distributed systems to building AI agents and managing complete digital platforms, I combine deep engineering expertise with a hands-on, product-oriented approach. 🚀 Core Expertise AI Agents & Intelligent Automation OpenClaw development, configuration, integration, and workflow automation. OpenCode-assisted software development and AI-powered coding workflows. Custom AI agents for business processes, task execution, and system integration. LLM integration, prompt engineering, Retrieval-Augmented Generation (RAG), and intelligent chatbots. Python-based AI applications, NLP, document processing, and data analysis. Backend & API Development Golang: Echo, Fiber, Fasthttp. PHP: Laravel, Symfony, Zend Framework / Laminas. Python: FastAPI, AI services, and automation. REST APIs, microservices, payment integrations, and third-party platform integrations. Databases & Infrastructure PostgreSQL, MySQL, Redis, Memcached, and FAISS. AWS, Azure, Linux, Docker, CI/CD, and production environments. Database design, query optimization, application performance, and system architecture. Full-Stack Development Vue.js, AngularJS, JavaScript, and API-driven web applications. Technical SEO, analytics, website optimization, and digital platform management. Integration with social media platforms and APIs. 💡 Selected Experience & Projects AI Engineering & Automation — PinchJob Designed and developed AI-powered solutions involving RAG architectures, semantic search, NLP classification, and intelligent data processing. Worked with FastAPI, PostgreSQL, FAISS, large language models, and computer vision to build practical AI-driven applications. Alalaw.lat — Product Development & Digital Platform Management Created and manage alalaw.lat, a digital platform focused on refrigeration tools and technical resources. My work extends beyond development to website administration, SEO, analytics, social media management, content strategy, and technical educational content for Facebook and Instagram. AI Agent Development — OpenClaw & OpenCode Work with modern AI-assisted development and agent-based automation workflows, including OpenClaw and OpenCode, to streamline software engineering, connect tools, automate repetitive tasks, and improve development productivity. E-commerce & Integrations — FedEx Cross Border Contributed to high-impact software projects involving payment gateways such as Adyen and BlueSnap, fraud prevention platforms including Riskified and Kount, and marketplace integrations with Amazon and Walmart. 🎯 What I Can Build for You Custom AI agents and business process automation. OpenClaw configuration, integrations, and automated workflows. AI-powered applications, RAG pipelines, and intelligent chatbots. High-performance Golang, PHP, and Python backends. REST APIs, microservices, and third-party integrations. Full-stack web applications and SaaS platforms. E-commerce integrations and payment processing. Website development, technical SEO, analytics, and ongoing platform management. 🤝 Why Work With Me? I combine senior-level engineering experience with practical AI implementation and end-to-end product ownership. I focus on understanding the business problem first, selecting the right technology, and delivering solutions that are maintainable, measurable, and ready for real-world use. Whether you need an experienced backend engineer, an AI automation specialist, or a technical partner to build and manage a digital product, I can help you move from requirements to implementation. Let’s build software that solves real problems.