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Senior Full-Stack Engineer | React • Next.js • Node.js | AI-Driven Development I’m a Senior Full-Stack Engineer with 9+ years of experience building scalable web and mobile applications. I specialize in React, Next.js, Node.js, and cloud architectures, helping startups and companies build reliable, high-performance products. What differentiates my workflow is an AI-augmented development approach. I leverage tools like Cursor AI and modern LLM-assisted workflows to accelerate development, improve code quality, and deliver production-ready solutions faster while maintaining clean and scalable architectures. I focus not only on writing code, but on designing systems that can grow with your business. I’ve worked across multiple industries building SaaS platforms, complex dashboards, APIs, mobile applications, and scalable backend systems. What I can help you with • SaaS development (MVP to scalable production systems) • Modern React / Next.js applications • React Native mobile apps (iOS & Android) • Backend systems with Node.js / NestJS • GraphQL and REST APIs • Real-time applications (WebSockets, streaming) • Authentication systems (JWT, OAuth, Auth0) • Payment integrations (Stripe) • Performance optimization and Core Web Vitals • Cloud deployment and infrastructure • AI-powered product features and workflows AI-Augmented Development My workflow integrates modern AI tools to increase development speed and reliability: • Cursor AI for contextual development and refactoring • AI-assisted architecture planning • Automated test generation • AI-assisted debugging and code analysis • LLM-driven documentation workflows This allows me to deliver results faster while maintaining senior-level code quality. Frontend React.js Next.js React Native Vue.js TypeScript / JavaScript Redux / Redux Toolkit / RTK Query Tailwind CSS Styled Components Chakra UI Storybook Framer Motion / GSAP Three.js / D3.js / Recharts Backend Node.js Express NestJS GraphQL (Apollo) REST APIs PostgreSQL MySQL MongoDB Prisma Redis RabbitMQ Kafka WebSockets JWT / OAuth Stripe / Twilio Firebase DevOps & Cloud AWS GCP Docker Kubernetes Serverless CI/CD (GitHub Actions / GitLab CI) Vercel Netlify Nginx PM2 Terraform Ansible Testing Jest Cypress Playwright Mocha Chai Supertest TDD I work with a performance-first mindset, focusing on clean architecture, maintainability, and long-term scalability. If you're building a SaaS, scaling a startup, or modernizing an existing product, I’d be happy to help.

As a seasoned full-stack software developer and site reliability engineer, I have extensive experience in improving system architecture, refactoring legacy code, and managing product design and development roadmaps. I am skilled in a variety of programming languages and tools, including JavaScript, C++, Java, Python, Node.js, PHP, and Bash, microservices, and functional and declarative programming using tools such as Ramda and Maybe. I have also developed fully functional mobile apps and websites using React, React Native, Next.js, Remix, Tailwind CSS, and Angular, along with technologies such as RxJS, MobX, and Redux to manage states and actions. I have extensive experience in LLM prompt design and optimization, agentic workflows, and full-cycle AI automation development. I have contributed to the AI ecosystem in several projects, such as: - A MCP server for preventing loops and stuckness in agent execution workflows: mcp-dual-cycle-reasoner - A Python / Node.js framework for prompt management, versioning, and testing: Prompt Assembly Language (PAL) In addition, I possess a dynamic and constantly evolving background in machine learning and deep learning, with a particular focus on developing and training neural networks, GPT, Transformers, and computer vision projects. My passion for this field extends to my recent exploration of RNN & VAE models trained for music generation. Throughout my career, I have prioritized security in all of my work and have a deep understanding of best practices and technologies related to cybersecurity and cloud infrastructure, having worked with various platforms such as AWS, DigitalOcean, and Google Cloud. I am skilled in building systems from the ground up, with a focus on user interaction and the implementation of different paradigms and coding practices. Here are some of the technologies, languages, and libraries that I am proficient in: - Javascript - Typescript - Node (Express, NestJS) - React, React Native, NextJS, Remix - WebRTC and peer connectivity (LibP2P) - Angular - Web3 (ethers, web3, Alchemy, Infura) - nanoGPT, LLaMa (LoRa, Alpaca), LangChain, LangGraph, RNN, HuggingFace Transformers - PyTorch, HuggingFace, bitsandbytes - Solidity - Ethereum (L1, L2) - AWS (Route53, ECS, Fargate, Lambda, IAM, etc) - Python (FastAPI, Pandas, SciKit-learn, numpy, etc) - Dart, Flutter - Ngrx, Mobx, RxJS, Redux, Saga, Reselect - Mongodb - Redis - SQL, MySQL, PostgreSQL - Bootstrap, Material, Native Base - Less, SCSS, CSS, Tailwind, Material-UI - C++, Java, C# - R - Objective-C - Android, iOS - Meteor - Net - And many more...

Over the past few years, I've worked on a wide range of projects: eCommerce platforms with role-based authentication and TikTok-style video content, AI-powered coaching tools and real-time metrics systems, and mobile apps with advanced features such as localization, internationalization, and financial management. In my freelance role, I've developed end-to-end features, from responsive UIs to API integrations, payment gateways with Stripe, push notifications, and administrative dashboards with custom filters and metrics. I also manage other developers, review pull requests before merging them into staging to ensure code quality and performance, and coach my team to adopt best practices and optimize their deliveries. I'm known for my ability to transform Figma designs into faithful implementations, work in agile environments, and quickly adapt to new technical challenges. Programming Languages : Typescript, Javascript, Python. Web Technologies: HTML, CSS. Frameworks/Libraries: React, Redux-toolkit, React Query, Node, Express, Next.js, React Native, Nest.js, TailwindCSS, Chakra UI, Zustand, Django. Data Bases: PostgreSQL, MongoDB, Firebase. ORM: Sequelize, Mongoose, Prisma. Version control: Git, GitHub, GitLab. Methodologies: Scrum.

I’m a developer experienced in building websites and apps for small and medium-sized businesses. I am starting in the freelance jobs.

I’m a React Native Developer obsessed with the details that most people overlook: the subtle haptic feedback on a button, the perfect UI sound, and the fluid transitions that make an app feel "liquid." I believe a great app should be a sensory experience, not just a functional tool. 🌈 ⌨️ What I help you with: 📌 Full-stack Mobile Development: From Figma to a polished App Store/Play Store product. 📌 Sensory UX: Implementing haptics, sounds, and animations that users love. 🎵 📌 Real-time Apps: Expert integration of WebSockets, Redux, and REST APIs. ⚡ 📌 Performance & Scalability: Writing clean, maintainable code that grows with your users. 📌 Native Bridge: Jumping into Swift when your project needs that extra native punch. 🍎 🛠️ My Tech Stack: Front End: JavaScript (ES6+) | TypeScript React Native (Expo & CLI) Redux | Context API Back End & Data: REST APIs | WebSockets Firebase | Supabase Native & Tools: Swift (iOS) Git | npm | Yarn Xcode | Android Studio Design: Figma (Pixel-perfect implementation) 🎨 🧩 Why work with me? ✅ Accountability: I take ownership of the project from day one. ✅ Feedback Driven: I’m obsessed with the user's feeling and constant improvement. ✅ Clear Communication: No ghosting, just honest and frequent updates. 🗣️ ✅ Quality First: Clean code and delightful interfaces are non-negotiable. If you’re looking for a developer who cares as much about the user feeling as the technical architecture, let’s build something great together! 🤝

Hey! I'm Lucas, I'm 22 years old and I am from Argentina.😃 3 years of experience as a Software Developer. I lead the development of Ventia’s mobile app, where I design and implement new feature while optimizing the user experience. I drive continuous delivery on the Play Store with regular updates that ensure stability, innovation, and steady growth in app adoption. Feel free to reach out to me for any help that you need, I'm here to help you! Regards, Lucas.