Most developers can write code. I build intelligent products that scale, automate, and solve complex business problems. With over 12 years of experience bridging the gap between technical architecture and business growth, I help companies launch high-performance applications and autonomous workflows using the modern JS/TS ecosystem (React, Next.js, Node, NestJS) and cutting-edge AI. Why work with a "Product-Minded" Developer? Strategic AI Integration: I don't just "add a chatbot." I build autonomous AI Agents and custom LLM chains to automate internal operations and enhance user experiences. Workflow Automation: I specialize in low-code/pro-code hybrid solutions using n8n and Make to connect your entire tech stack and eliminate manual bottlenecks. Performance at Scale: From AWS Lambda optimizations to Micro-frontend architecture, I build for speed, security, and long-term reliability. Full-Cycle Ownership: From AI logic to CI/CD pipelines, I handle the "how" so you can focus on the "what." ⚡ Technical Mastery: AI & Automation: Custom AI Agents, OpenAI/Anthropic API, LangChain, n8n, Make, Zapier, Vector Databases (Pinecone, Weaviate). Frontend: React.js, Next.js (SSR/SSG), React Native, TypeScript, Tailwind. Backend: NestJS, Node.js, GraphQL, Microservices, Python (Django/FastAPI). Cloud & DevOps: AWS (Full Suite), Docker, Kubernetes, CI/CD (GitHub Actions). What I deliver: AI-Driven Solutions: Custom-built agents that handle data, customer support, or content generation autonomously. Automated Ecosystems: Seamless workflows in n8n or Make that sync your CRM, DB, and apps in real-time. Scalable Web & Mobile: Clean, maintainable code using Next.js, NestJS, and React Native. Cloud Infrastructure: Robust, cost-efficient AWS setups designed for high-traffic applications. Let’s turn your vision into a production-ready, automated reality. Hit the "Invite" button, and let’s discuss your project roadmap. FullStack, AI, AIAgents, GenerativeAI, LLM, n8n, MakeCom, WorkflowAutomation, AutomationExpert, ReactJS, NextJS, NodeJS, NestJS, TypeScript, JavaScript, AWS, AmazonWebServices, SoftwareArchitecture, WebDevelopment, MobileDevelopment, ReactNative, Expo, GraphQL, RESTAPI, Microservices, Serverless, PostgreSQL, MongoDB, Redis, Firebase, Docker, Kubernetes, CI_CD, GitHubActions, DevOps, TailwindCSS, Redux, Testing, Jest, Cypress, CloudComputing, MVP, SaaS, FinTech, APIIntegration, Stripe, Auth0, SocketIO, WebSockets, PerformanceOptimization, Scalability, Agile, Scrum, ProductDevelopment, Frontend, Backend, UI_UX, HeadlessCMS

Software Development Engineer Core Competencies: • RESTful API, Web Services, Microservices • Programming language (JavaScript, PHP, Perl, Ruby, Java, Python, Go, .NET) • Java frameworks (Spring, Spring Boot) • Messaging (Apache Kafka, AWS SQS) • Big Data (Apache Spark, Apache Airflow, Sqoop, Presto/Trino, Apache Flink, Elasticsearch) • DB (SQL, NoSQL (Redis, Casandra, DynamoDB, BigTable)) • CI/CD • Monitoring/Observability • Testing Strategy • AWS • Code Review • Interview

I am a US-based AI-enhanced, full-stack web and automation engineer. I write easy-to-read, well-tested code, and I have many stellar references, including a few dozen on this Upwork profile. My background is with Ruby on Rails, many varieties of JavaScript including Hotwire/Turbo, Typescript, React, Backbone, Next.js, and several others. I also have experience with custom WordPress and Liquid (Shopify) development. I have built many REST APIs and consumed countless others within web applications, and with webhooks and serverless functions, such as with Supabase, Firebase, and Airtable. Most of the systems I have built and upgraded include integrations with 3rd-Party automation, including N2N and Zapier.

I'm a senior full-stack engineer with 9 years of production experience, specializing in healthcare SaaS and AI/LLM engineering with LangChain and LangGraph. Recent work: • Enterprise behavioral-health telehealth platform (Rails 7 + NestJS + Python FastAPI AI service on Terraform/K8s) with FHIR, HL7, e-prescribing, and integrations to Healthie, Athena Health, and Stream Chat • AI-powered legal research platform (FastAPI + LangChain + Azure OpenAI) with 7 specialized chain types, NDJSON streaming, and semantic + vector hybrid search over court judgments • Real estate data analytics platform with a multi-agent LangChain system that translates natural language to Elasticsearch queries, backed by pgvector and DuckDB • Two-sided dental staffing marketplace (Rails 7.1 + Stripe Connect + HubSpot bidirectional sync) with 48 Sidekiq workers, DMA-based geographic matching, and materialized-view-powered provider search I'm strongest on: • Healthcare SaaS — HIPAA-conscious telehealth, FHIR, e-prescribing (DoseSpot, Ayva Treat, Athena Health), clinical workflows, complex state machines • AI engineering — LangChain, LangGraph, RAG pipelines, multi-agent orchestration, streaming responses, production-ready LLM features • Marketplaces & multi-tenant SaaS — Stripe Connect, two-sided platforms, subscription billing, HubSpot/Salesforce/QuickBooks integrations • Full-stack — Rails (5.2 → 8.0), Next.js, React, TypeScript, PostgreSQL, Sidekiq, Redis, AWS (Terraform), Heroku, Vercel I'm good at stepping into existing codebases, understanding what's there, and shipping without breaking anything. Comfortable with 10-file startups and 10,000-file enterprise monoliths — I've done both in the last year. Ideal projects: Healthcare SaaS builds or rescues, AI feature integration (RAG, chat, agent workflows), Rails modernization, marketplace/payment architecture, production LLM engineering

How to turn what it seems to be impossible on your project into nice, clean, and functional code by hiring Deyvid Arauz the heroic soldier and biggest commander and front man of the new wave of Top-Quality developers of Latin America. Dear potential client and future business associate, I would appreciate a couple of minutes of your time and attention to accompany me with the reading of these lines in a small journey through my professional profile, goals, aspirations, personal standards and characteristics that represent me as scholar and lover of the universe of web development, in order to help you get to know me as an engineer and developer, this being a selection tool with which you can make the best decision for your project to be successful through my services and added values to your assignment. Whenever I start a new assignment or project, I first focus on knowing its objective, the scope it will have, the requirements that the client has, with these ideas already clear, I begin the work of transforming the client's abstract ideas into a most viable conception for development without abandoning the essence of the client's idea and pursuing as the main goal the purpose that the owner of the project wants to obtain, always taking care of the profitability of the assignment. Once the coding plan is clear, I design a project planning route so that the work carried out has a successive and understandable order for anyone, with or without knowledge of web development or previous experience in the field. Time management to meet expectations and deliveries with a deadline is of the utmost importance to maintainthe expected international standards, which is why I always make a task execution plan, dividing them into priorities adjusted to the different requested delivery dates. by clients, in addition to dividing the tasks into small subtasks that allow me to have a visual of more organized progress. If it is necessary in some very particular aspect of the needs of our clients, I have no problem with creating the code from scratch and totally customized to the client's needs. Clients can expect from me the complete execution of their primary ideas, the ability to take an abstract idea and turn it into a reality, flashes of idea owners' mental insights into marketable functionality. United with the common thread of a formal, polite, respectful, constant, and continuous relationship to be aware of the changing needs of our clients, I believe that constant communication with the client and with all the members of the team are key to success in customer management and is key to maintaining business relationships. Thank you for staying with me until this advanced distance in our journey, at this moment I will take a few more moments of your time to tell you about my professional experience in the world of development, all my participation. 1-Lolo-car is a vehicle rental service where as a user you have the possibility of making your personal vehicle available to be rented or to be able to rent the vehicle of another user, it has an online payment service through the MercadoPago platform, implements validation of the user profile through a service called Metamap, which is responsible for validating the identity of the users through some data that they provide to the application, once the users are verified they have the possibility of leasing the vehicles of other users, see the earnings 2. React To-Do App. It is an application whose main function is to provide us with control of our daily activities, through the intelligent organization of the task list controlled by a set of functionalities designed with tools and time management principles in order to obtain a better use of it, within some of these functionalities: we have the ability to visualize our pending tasks, they can be grouped by priorities and make subcategories based on other priorities within the groups, it is a simple human empowerment tool in relation to the use of time. The React To-Do App also has a Quotes API. This project is an api that has phrases of success and personal development from different experts in the field of empowerment of thought, productivity and success in business, with the main purpose of being used freely to be able to display a new phrase every day. For more technical details about my experience, please check my portfolio as well! Experience is a good that is obtained with years of practice and repetition of an action, the accelerated learning capacity and adaptability with which I was endowed from a very early age allow me to have extremely small learning curves that to a certain extent compensate for the lack of experience. I know that at this point, you are more ready to make the right decision for your project. These lines have the sole purpose of facilitating your decision and helping you to be successful through me in your project.

Supercharge your operations with AI-powered workflows. Teams usually bring me in to: - Uncover bottlenecks and waste. - Aim for the highest-ROI AI opportunities. - Build the solutions that make the most operational and financial sense. On one side I help AI-driven SaaS founders prototype and launch in weeks. On the other I help large teams take back control of their roadmap by making their tools smarter and automate repetitive tasks. If you’re looking for your team to operate in unison with AI workflows, press the green button and send me a message! I’d be happy to discuss your project, worst case scenario you’ll get professional perspective about your scope 🙂

💼 16+ years of experience | Delivered 750+ projects | Trusted by startups, enterprises & global agencies I help businesses build high-performing digital products, from full-stack web applications and mobile apps to advanced Salesforce implementations and AI-powered automation systems. With 16+ years in the industry, I bring deep technical expertise, strong architectural thinking, and a proven track record of delivering scalable, secure, and future-ready solutions. 💻 Full-Stack Web Development Expert in architecting and building modern web applications: Frontend: React.js, Next.js, Angular, Vue.js, TypeScript Backend: Node.js, Express.js, Python (Django/Flask), PHP (Laravel), .NET, Java Spring Boot Databases: PostgreSQL, MySQL, MongoDB, Firebase, Redis Cloud & DevOps: AWS, Azure, GCP | Docker | Kubernetes | CI/CD pipelines E-Commerce & CMS: WordPress, Shopify, WooCommerce, Headless CMS, Strapi I build high-performance systems engineered for reliability, speed, and long-term scalability. 📱 Mobile App Development (iOS & Android) End-to-end development using: Flutter, React Native, Swift, Kotlin Apps delivered with seamless UI/UX, optimized performance, smooth animations, and scalable architecture. ⚙️ Salesforce Consulting & Development 16 years of enterprise-level experience across multiple Salesforce clouds: ✓ Apex, LWC, Visualforce, Flows ✓ API integrations (REST/SOAP) ✓ Sales Cloud, Service Cloud, Experience Cloud ✓ Custom automations & Process Optimization ✓ Salesforce → Mobile/Web Integrations ✓ Data Migration & Custom Dashboards I help businesses transform operations, automate workflows, and maximize adoption. 🤖 AI, Automation & Integrations I design intelligent automation that reduces manual work and boosts efficiency: ✨ AI Chatbots (OpenAI, Gemini, Llama) ✨ Workflow automation (Zapier, Make, n8n) ✨ AI-driven analytics, recommendations, classification ✨ Custom ML models & integrations ✨ API development, RPA & ETL pipelines From MVPs to production-grade SaaS, I bring AI into real business workflows. 🌐 End-to-End Product Engineering I support the full product lifecycle: ✔ Architecture & planning ✔ UI/UX collaboration ✔ Development ✔ QA & automated testing ✔ Cloud deployment & monitoring ✔ Ongoing enhancements & support 🏆 Why Clients Love Working With Me ✔ 16+ years of deep technical leadership ✔ Clean, scalable, and secure code ✔ Transparent communication & daily updates ✔ On-time delivery ✔ Long-term support for scaling products ✔ Flexible engagement (hourly, monthly, fixed-price) 🌍 Industries I’ve Worked With SaaS • E-commerce • Real Estate • HealthTech • EdTech • FinTech • Logistics • AI startups • Enterprise CRM 📞 Let’s Build Something Exceptional Whether you need a senior full-stack developer, Salesforce expert, or AI automation architect, I bring the experience and capability to deliver results that exceed expectations. Send me a message — happy to discuss your project!

𝗣𝗮𝘀𝘀𝗶𝗼𝗻. 𝗖𝗼𝗺𝗺𝗶𝘁𝗺𝗲𝗻𝘁. 𝗧𝗿𝘂𝘀𝘁. 𝗦𝗸𝗶𝗹𝗹. 𝗧𝗵𝗶𝘀 𝗶𝘀 𝗵𝗼𝘄 𝗶 𝘄𝗶𝗹𝗹 𝗯𝘂𝗶𝗹𝗱 𝗺𝘆 𝗿𝗲𝗹𝗮𝘁𝗶𝗼𝗻𝘀𝗵𝗶𝗽 𝘄𝗶𝘁𝗵 𝘆𝗼𝘂. I have a track record of impressive achievements, including earning over $30k and securing multiple 5-star reviews accompanied by exceptionally positive feedback. Over the past few years, I have had the privilege of helping 100+ startups turn their app ideas into real, thriving products across industries like: ✅ Health & Fitness ✅ EdTech ✅ E-Commerce ✅ Real Estate ✅ Fintech ✅ Supply Chain & Logistics ✅ E-Gaming ✅ Salon & SPA ✅ Marketplaces & SaaS Whether it’s building a clean MVP or scaling a complex system, I focus on one thing: creating apps people love to use fast, stable, and beautiful. 💡 𝗠𝘆 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 I specialize in cross-platform mobile app development, using: ● React Native (Expo & CLI) – pixel-perfect mobile apps for iOS and Android ● Flutter – smooth UI, high performance, and native-like experience ● Firebase, REST, GraphQL, AWS – powerful and reliable backends ● OpenAI & n8n – automation and smart app integrations 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸: - Write clean, modular, and well-documented code - Follow best design and architecture practices for maintainability - Communicate clearly and deliver on time always - Treat every project as my own product because your success is mine ❤️𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 Because I don’t just build apps I build partnerships, understand your vision, and bring it to life with creativity, precision, and passion. Let’s create something exceptional your users will love it, and your investors will remember it. 📩 Send me a message, and let’s bring your app to life.

🚀 Welcome to my Upwork profile! 🚀 Hi! I'm an expert full-stack developer with plenty of expertise in modern web technologies. I use my expertise in Ruby, Ruby on Rails, React, and Python to build dynamic, scalable, and user-friendly web applications. While expert in these core languages, I have additional experience in frameworks like Next.js, Express.js and Django depending on project needs. My Services: 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: I craft beautiful and responsive user interfaces using ReactJS, make sure a smooth user experience across all devices. 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: I build robust and efficient APIs using Ruby on Rails and Python, enabling smooth data flow and server-side logic. 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: I smoothly integrate frontend and backend components, delivering a cohesive and high-performing application. Why Choose Me? 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐌𝐚𝐬𝐭𝐞𝐫𝐲: I handle both frontend and backend development, providing a single point of contact for your project. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐀𝐠𝐧𝐨𝐬𝐭𝐢𝐜: I adapt my skillset to your project needs, using the most suitable technologies (React, Ruby, Ruby on Rails, Python). 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞-𝐃𝐫𝐢𝐯𝐞𝐧: I prioritize clean code, efficient architecture, and using solutions to make sure a fast and reliable user experience. 𝐂𝐥𝐞𝐚𝐫 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧: I believe in open communication and work collaboratively with clients to translate their vision into reality. Ready to build your next game-changing web application? Let's discuss your project! 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Full-Stack Developer, React, Ruby, Python, Ruby on Rails, Web Development, APIs, User Interface, User Experience, Web Development, APIs, User Interface, User Experience

I'm a Ruby on Rails developer with extensive experience in building high quality sites. Individually I come to every customer. Fully participate in the project and invest in it the whole soul. I follow generally accepted coding style and best practices.