I help startups and growing businesses build, improve, and scale modern web applications. With 6+ years of experience in full-stack development, I specialize in building reliable backend systems, scalable APIs, cloud infrastructure, and production-ready applications. While my strongest expertise is backend engineering, I also work across the full stack to deliver complete solutions when needed. Clients typically work with me when they need someone who can quickly understand an existing codebase, solve difficult technical problems, and move features to production with confidence. 🚀 Core Expertise 🟢 Frontend • React.js • Next.js • TypeScript • JavaScript • HTML / CSS • Tailwind CSS 🔵 Backend • Node.js • NestJS • Express.js • Fastify • REST APIs • GraphQL • Authentication & Authorization • Webhooks & Third-party Integrations 🟣 Cloud & Infrastructure • AWS (S3, EC2, Lambda, RDS, CloudWatch) • Azure (VM, Blob Storage, Functions, Service Bus) • Docker • CI/CD Pipelines • Production Deployments 🟠 Databases • PostgreSQL • MySQL • MongoDB • Redis • Prisma ORM 💡 What I Usually Help Clients With ✅ Full stack web application development ✅ Backend architecture and API development ✅ SaaS platform development ✅ Payment and subscription integrations ✅ Database design and optimization ✅ Cloud deployment and infrastructure ✅ Debugging and production issue resolution ✅ Performance optimization ✅ Refactoring and modernization of existing systems ✅ Long-term product development 🤝 What You Can Expect Working With Me 🎯 Clear and proactive communication 🎯 Clean and maintainable code 🎯 Fast understanding of existing systems 🎯 Practical engineering decisions 🎯 Ownership mindset and reliable delivery I focus on building software that is scalable, maintainable, and aligned with business goals—not overengineering. Whether you need to build something from scratch, improve an existing application, or solve complex technical challenges, I’d be happy to help. Let’s discuss your project.

I’m Nico and here’s what you need to know: I’m a software developer with over 10 years of experience, specializing in search and RAG (Retrieval-Augmented Generation) applications. Right now, I’m actively building both advanced search solutions and RAG systems that combine LLMs with Elasticsearch and Opensearch. I’ve worked on some of the biggest online shops in Germany, where I developed and optimized complex search solutions. I have deep experience designing semantic searches that understand intent and meaning, not just keywords. I’m also the creator of a SaaS Search application based on Elasticsearch, which has been running strong for the past few years. For the last 4 years I’ve been helping companies in the US, Germany, Austria, and Switzerland build and improve their search solutions. I can adapt to whatever your project needs, but I have the most experience with these tools: ReactJS, VueJs, PHP, Python, Tailwind, Laravel, Statamic, Elasticsearch, Opensearch, AWS, Google Cloud, and Linux. I don’t know the specifics of your project yet, but I’ll give my best to deliver results you’re happy with.

🚀 𝗠𝗮𝗰𝗵𝗶𝗻𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 | 𝗔𝗜 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 | 𝗗𝗮𝘀𝗵𝗯𝗼𝗮𝗿𝗱 | 𝗗𝗮𝘁𝗮 𝗩𝗶𝘀𝘂𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 | 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 | 𝗔𝗜 𝗦𝗮𝗮𝗦 & | 𝗔𝗜 𝗔𝗽𝗽 𝗗𝗲v𝗲𝗹𝗼𝗽𝗲𝗿 🏆 Top Rated 👨‍💻 𝘈𝘷𝘢𝘪𝘭𝘢𝘣𝘭𝘦 immediately ✅ 100% Job Success 🚀 On-time Delivery I design and develop intelligent AI-powered applications that automate business processes, improve decision-making, and enhance customer experiences. With expertise in Python, Machine Learning, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), AI Agents, SaaS platforms, and cloud technologies, I build scalable solutions from concept to production. My experience includes developing AI chatbots, multi-agent systems, document intelligence platforms, recommendation engines, predictive analytics solutions, workflow automation tools, and enterprise SaaS applications. I specialize in integrating OpenAI, Claude, Gemini, and open-source LLMs with modern backend architectures using FastAPI and cloud infrastructure on AWS. From data collection and model training to deployment, monitoring, and optimization, I deliver end-to-end AI solutions that help businesses reduce operational costs, increase efficiency, and unlock valuable insights from their data. 🎯 Core Skills ✔ Artificial Intelligence (AI) ✔ Machine Learning (ML) ✔ Generative AI ✔ Large Language Models (LLMs) ✔ Retrieval-Augmented Generation (RAG) ✔ AI Agent Development ✔ Multi-Agent Systems ✔ Prompt Engineering ✔ Natural Language Processing (NLP) ✔ Deep Learning ✔ Predictive Analytics ✔ Data Science ✔ SaaS Development ✔ Backend Development ✔ API Development ✔ Workflow Automation ✔ Cloud Computing ✔ MLOps ✔ Data Engineering ✔ Dashboard & Reporting ⚙️ Tech Stack ➤ Programming Languages Python, React, Node.js, Django, Flask, FastAPI, Next.js, jQuery, SQL, JavaScript, TypeScript, HTML, CSS ➤ AI & Machine Learning OpenAI GPT, Claude, Gemini, Llama, LangChain, LangGraph, CrewAI, AutoGen, Hugging Face, TensorFlow, PyTorch, Scikit-Learn, XGBoost ➤ RAG & Vector Databases Pinecone, Weaviate, ChromaDB, FAISS, Qdrant, Elasticsearch ➤ Backend Development FastAPI, Flask, Django, REST APIs, GraphQL, WebSockets ➤ Databases Development PostgreSQL, MySQL, MongoDB, Redis, Airtable, DynamoDB, Neo4j, Elasticsearch, OpenSearch ➤ Cloud & DevOps AWS, Docker, Kubernetes, Terraform, GitHub Actions, CI/CD Pipelines, Linux ➤ Data Visualization Power BI, Tableau, Looker, Kibana, Grafana, Elasticsearch, Streamlit, Plotly, Dash, R ➤ Automation & Integration OpenClaw, Zapier, Make, n8n, Apache Airflow, Pipedream, Celery ➤ CRM & Sales Automation HubSpot, Salesforce, GoHighLevel (GHL), Pipedrive, Zoho CRM, Streak CRM ➤ Communication Automation Twilio, SendGrid, Gmail API, Outlook API, Slack, Microsoft Teams, WhatsApp Business API 🏢 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 Healthcare, Finance & FinTech, E-commerce, Real Estate, Education, Legal Tech, Marketing & Sales, Logistics & Supply Chain, Human Resources, Customer Support, Manufacturing, SaaS Startups & Enterprises I offer 𝟯𝟬 𝗺𝗶𝗻 𝗽𝗮𝗶𝗱 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻𝘀 for AI architecture review, build vs. buy decisions, and MVP scoping. ━━━━━━━━━━━━━━━━━━━━━━━ 💬 LET’S BUILD ━━━━━━━━━━━━━━━━━━━━━━━ 👉 Send me a message — I’ll help you design and build it the right way.

I’m a Senior Full-Stack Web Developer with 10+ years of experience, specializing in modern web applications, scalable APIs, AI integrations, and microservices. I help businesses build high-performance, secure, and user-friendly applications from planning to deployment. I have experience working in Agile teams (SCRUM) and can assist in making the right technology choices, including domain, hosting, and deployment decisions. I love challenges and always strive to improve products with innovative solutions. 🏆 Expertise & Skills 🎨 Frontend Development ✔️ HTML, CSS, JavaScript, TypeScript ✔️ React.js, Next.js, Livewire ✔️ Bootstrap, Tailwind CSS ✔️ jQuery, AJAX ✔️ Firebase (Authentication, Realtime Database) ✔️ WordPress (Custom Themes & Plugins) ⚙️ Backend Development ✔️ PHP (Laravel, Yii2, Livewire) ✔️ Node.js (Express, Fastify) ✔️ RESTful APIs & Webhooks ✔️ Microservices Architecture ✔️ AI & ML API Integration (OpenAI, LangChain, Google AI) 📊 Databases & Cloud ✔️ MySQL, PostgreSQL, MongoDB ✔️ AWS (Lambda, S3, RDS, SES, SNS, EC2) ✔️ Firebase (Firestore, Notifications) 🔗 No-Code & Automation ✔️ Supabase ✔️ Zapier & Make (Integromat) ✔️ Airtable Backend Automation 🔧 DevOps & Containerization ✔️ Docker & Docker Compose ✔️ CI/CD Pipelines ✔️ Git, Linux, Nginx, Apache 🔧 Third-Party Integrations ✔️ Payment Gateways: Stripe, Chargebee, PayPal, Recurly ✔️ Social Media APIs: Facebook, Twitter, LinkedIn ✔️ Twilio, Google APIs (Analytics, Calendar, Gmail) ✔️ QuickBooks, Salesforce, Zapier Workflows ✔️ House Measurement APIs (EagleView, SkyMeasure) 🌟 Why Work With Me? ✔️ Full-Stack Expertise – I handle both frontend & backend for a complete solution. ✔️ AI-Driven Automation – I integrate AI & ML APIs to enhance business workflows. ✔️ Fast, Secure & Scalable Code – Optimized for performance and long-term stability. ✔️ Cloud & Docker-Ready – Ensuring smooth deployment & scalability. ✔️ Long-Term Support – I provide post-project support for ongoing success. If you're looking for a skilled full-stack developer to bring your project to life, let's connect! 🤝

I'm your entire tech department until you're ready to build one — one senior hire instead of five. Idea, PRD, architecture, code, deploy: all me. 5 SaaS built, $325K raised, Founders of a product exit at $5M+, Fortune 500 delivery (John Hancock, Manulife, Unilever), 5,400+ Upwork hrs with 100% JSS. I help non-technical founders and scaling startups avoid the expensive mistakes I've already made. Whether you need an honest architecture audit, an AI feature integrated into your SaaS, or a technical partner to take you from MVP to production — I've done it, shipped it, and sold it. WHERE I ADD THE MOST VALUE: 🔹 Fractional CTO for Non-Technical Founders — Independent technical oversight, architecture reviews, developer evaluation, launch readiness audits, and protection from cost overruns (API bills, bad code, security gaps). I speak both founder and engineer. 🔹 AI Integration into Existing SaaS — LangChain-powered chatbots, RAG-based document search, AI agents, and intelligent automation that actually work in production. Not demos. Real systems that have increased user engagement by 170%. 🔹 Multi-Tenant SaaS Development (MVP → Scale) — Full architecture to deployment: auth, billing (Stripe), tenant isolation, CI/CD, observability. I take founders from an idea to a deployed MVP in 4–8 weeks with weekly demos. 🔹 AI Automation Workflows (n8n + LangChain) — Event-driven pipelines connecting CRMs, email, support tools, and custom APIs. Clients typically save 20+ hours/week and cut operational costs by 70%. WHY FOUNDERS HIRE ME: ✅ $100K+ earned on Upwork | 100% Job Success | Top Rated Plus ✅ 5 SaaS products built from scratch — 1 acquired for $5M+ ✅ Co-founded CommEngine (AI platform) — raised $325K, team of 15+ ✅ 20 years in software | 67+ businesses served ✅ I've been in your seat: raised capital, hired teams, shipped to market, and exited TECH STACK: • AI: LangChain, LangGraph, OpenAI, Claude API, RAG, Pinecone, AI Agents • Backend: Python/FastAPI, Node.js/NestJS, C#/.NET, Go • Frontend: React, Angular, Next.js, TypeScript • Data: Supabase, PostgreSQL, Redis, Elasticsearch • Cloud: AWS, Azure, Docker, Vercel • Automation: n8n, event-driven architecture, Kafka/RabbitMQ WHO I WORK BEST WITH: Non-technical founders who need a trusted technical partner. Early-stage SaaS companies going from MVP to scale. Established SaaS products adding AI features. Teams that have been burned by developers before and need someone who's built real products. HOW TO START: Send me your project details or the problem you're solving. I'll reply within a few hours with an honest assessment and a clear plan — including whether I'm the right fit. If I'm not, I'll tell you.

𝐒𝐢𝐧𝐜𝐞 𝟐𝟎𝟎𝟕, 𝐰𝐞’𝐯𝐞 𝐩𝐫𝐨𝐯𝐢𝐝𝐞𝐝 𝐚 𝐭𝐚𝐥𝐞𝐧𝐭𝐞𝐝 𝐚𝐧𝐝 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 𝐭𝐞𝐚𝐦 capable of working independently or integrating seamlessly into your existing team to turn your project ideas into reality. Offering flexible engagement models, competitive pricing, and a focus on your success, we are your ideal technical partner. Let us help bring your vision to life. # 𝐎𝐮𝐫 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐜𝐨𝐯𝐞𝐫𝐬 𝐜𝐨𝐦𝐩𝐥𝐞𝐱, 𝐥𝐨𝐧𝐠-𝐭𝐞𝐫𝐦 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 using the latest technologies: - Mobile: Flutter, React Native - Backend: Node.js, NestJS, Python (Django/Flask), PHP (Symfony, Laravel) - Frontend: Angular, Typescript, React.js, NextJS, ExtJS/Sencha - AI: ChatGPT, Claude, Gemini 🤖 - Cloud & Databases, etc: AWS/GCP, S3, SQL/NoSQL, WebRTC - UI/UX: Design and User eXperience solutions # 𝐖𝐡𝐲 𝐏𝐚𝐫𝐭𝐧𝐞𝐫 𝐰𝐢𝐭𝐡 𝐔𝐬? - Focus on your core business while we handle your IT needs. - Access expert-level skills without the overhead of training. - Mitigate risks through our deep industry knowledge. - Streamline your operations and improve flexibility. - Boost productivity and gain a competitive edge with our expertise.

🥇 Top 1% - Upwork Ruby on Rails & AI Solutions ✅ Expert in AI LLM OpenAI GPT ✅ Senior developer (10+ years experience) ✅ 50 completed projects & 9000 hours on UpWork! 🇺🇸 Work in PST/PDT time zone. Hi, 👋 I'm Alex! I've worked with dozens of Ruby on Rails applications, from small startups to huge production apps with millions of users. Included: SAAS, IAAS, marketplace, search engines etc. Also, I am an OSS contributor, maintaining RubyAI, kredis, cookies_eu, and other gems in the Ruby ecosystem. - Ruby and Ruby on Rails - JavaScript, React - Stimulus, Turbo, Hotwired - HTML, HAML, and HTML5 - PostgreSQL and MySQL for backend databases - Version control with Git and GitHub - SAAS, IAAS, eCommerce applications. - UX/design, SEO - DevOps (Hetzner, DigitalOcean etc)

Looking for a Ruby on Rails expert who delivers reliable, high-performance web applications? With 9+ years of hands-on experience, I specialize in building scalable, secure, and business-driven web solutions. I don’t just write code—I focus on understanding your product vision and turning it into a robust application that delivers real value. Here’s What I Can Do for You: Ruby on Rails Mastery: I have deep expertise in Ruby on Rails, from clean and maintainable backend architecture to seamless frontend integration. I’m comfortable handling everything—from database design and API development to complex business logic and third-party integrations. Modern Tech Stack: I work with today’s most in-demand technologies, including PostgreSQL, Redis, Sidekiq, Hotwire (Turbo & Stimulus), React, REST & GraphQL APIs, and cloud platforms like AWS. I also have strong experience with Docker, background jobs, and service-oriented architectures. Technical Leadership & Architecture: I’ve led teams, reviewed system designs, and defined technical strategies aligned with best practices. I enjoy architecting applications that are scalable, secure, and easy to maintain as your product grows. Code Quality & Mentorship: Clean code matters. I actively follow best practices, write testable code, and conduct detailed code reviews. I also enjoy mentoring junior developers and improving overall team productivity and code standards. Performance & Scalability: I help applications run faster by optimizing database queries, implementing caching strategies, improving background processing, and identifying performance bottlenecks early. Security-Focused Development: Security is never an afterthought. I follow strong practices for authentication, authorization, data protection, and compliance, while staying updated with the latest security standards and vulnerabilities. CI/CD & DevOps Practices: I have hands-on experience setting up CI/CD pipelines, automated testing, and smooth deployment workflows to ensure faster releases and reliable production environments. Why Work With Me? Client-First Mindset: I believe in clear communication, transparency, and collaboration. I work closely with clients to understand their goals, deliver on time, and stay within budget. Always Learning, Always Improving: Technology evolves fast—and so do I. I continuously upgrade my skills to bring modern, efficient, and future-ready solutions to your projects. 🚀 Let’s build something great together. If you’re looking for a dependable Ruby on Rails expert who understands both technology and business, I’d love to work on your next idea.

Senior Full-Stack SaaS Developer | Node.js, Supabase, AI Integrations & Scalable APIs 𝐈'𝐦 𝐏𝐫𝐚𝐦𝐞𝐞𝐭, a Full-Stack Developer with 6+ years of experience building SaaS platforms, AI-powered applications, scalable APIs, and cloud-native systems for startups and growing businesses. I help founders and teams launch, scale, and optimize products using modern technologies like Node.js, Supabase, React, Next.js, PostgreSQL, AWS, OpenAI, Claude, and Stripe. What I Can Help You Build ✅ SaaS Applications & Multi-Tenant Platforms ✅ AI Applications (OpenAI, Claude, Gemini, RAG, AI Agents) ✅ Custom APIs & Third-Party Integrations ✅ Supabase Applications (Auth, RLS, Realtime, Edge Functions) ✅ Stripe Subscriptions & Marketplace Payments ✅ Admin Dashboards & Internal Tools ✅ Automation Workflows & Business Process Automation ✅ Cloud Infrastructure & Production Deployments Core Expertise ============= Backend Development --------------------------- #Node.js, Express.js, NestJS #REST APIs, GraphQL, Microservices #Authentication & Authorization #Queue Systems & Background Jobs AI & Automation ------------------- #OpenAI, Claude, Gemini #RAG Pipelines #Vector Databases #AI Agents & Workflow Automation #Prompt Engineering Frontend Development --------------------------- #React.js #Next.js #TypeScript #Tailwind CSS Database & Cloud ---------------------- #Supabase #PostgreSQL #MongoDB #AWS #Docker #CI/CD Pipelines ((Why Clients Hire Me)) ==================== ✔ Product-minded developer, not just a coder ✔ Experience taking products from MVP to production ✔ Strong focus on scalability, security, and maintainability ✔ Fast communication and proactive problem-solving ✔ Comfortable working independently or with existing teams Whether you're building an AI startup, SaaS platform, marketplace, automation tool, or scaling an existing product, I can help turn ideas into reliable, production-ready applications. Let's discuss your project and build something exceptional

🚀 Experienced and dynamic Fullstack Developer proficient in Java and React, dedicated to delivering robust and scalable web applications. With a solid foundation in both front-end and back-end technologies, I thrive in creating cohesive digital experiences that exceed user expectations. 🌟 Throughout my career, I have successfully developed and deployed numerous applications utilizing Java and React. From building intricate front-end interfaces with React to architecting resilient back-end systems with Java, I have consistently delivered high-quality solutions tailored to meet diverse client needs. My experience spans across various industries including e-commerce, finance, and healthcare, providing me with valuable insights into industry-specific challenges and requirements. 💼 Technical Expertise: Java Development: Proficient in developing enterprise-level applications using Java frameworks such as Spring and Hibernate. Skilled in database management, RESTful API integration, and microservices architecture. ☕ React Development: Expertise in crafting responsive and interactive user interfaces with React.js, leveraging state management libraries like Redux for efficient data flow and component reusability. ⚛️ Fullstack Proficiency: Demonstrated ability to seamlessly integrate front-end and back-end components to create cohesive fullstack applications. Comfortable working with both client-side and server-side technologies to ensure optimal performance and user experience. 🛠️ DevOps Skills: Familiar with DevOps practices including continuous integration, deployment automation, and containerization using tools like Docker and Jenkins. 🛳️ Industry Expertise: I have collaborated with clients across various industries, including e-commerce, fintech, healthcare, and education. This diverse exposure has equipped me with a comprehensive understanding of industry-specific requirements and best practices. Whether it's optimizing checkout processes for e-commerce platforms or ensuring compliance and security standards in healthcare applications, I approach each project with tailored solutions that align with industry standards and regulations. 🏥💳 Why Me: Proven Track Record: My portfolio showcases a history of successful projects, demonstrating my ability to deliver results consistently. 📈 Collaborative Approach: I believe in fostering open communication and collaboration throughout the development process, ensuring alignment with client objectives and expectations. 🤝 Continuous Learning: I am committed to staying updated with the latest technologies and trends in the industry, enabling me to leverage cutting-edge solutions and methodologies in my work. 📚 Problem-Solving Skills: With a keen eye for detail and a proactive approach to problem-solving, I excel in overcoming challenges and delivering innovative solutions that address client needs effectively. Choose me for your next project, and together, we can build exceptional digital experiences powered by the synergy of Java and React technologies. 🚀🔥