Hi, I’m Serghei. I help startups, agencies, and businesses build production-ready web and mobile applications, from idea and architecture to backend development, deployment, and ongoing improvements. I specialize in Laravel, custom PHP systems, REST APIs, SaaS platforms, CRM systems, dashboards, and React Native mobile apps with Expo. I can help you with: • Building web applications from scratch • Developing backend systems and APIs • Creating SaaS platforms and subscription systems • Integrating Stripe payments and third-party services • Building React Native mobile apps • Improving, fixing, or extending existing projects • Creating clean and fast landing pages when needed Tech stack: • Laravel / PHP • MySQL / PostgreSQL • REST APIs • React Native / Expo • Stripe • SaaS architecture • CRM and dashboard development I’m comfortable working even when there is no full specification or design yet. I can help clarify the idea, suggest the right technical approach, and turn it into a working product. Whether you need a new product built from scratch or improvements to an existing system, I can quickly understand the requirements and deliver reliable, clean, and maintainable solutions.

Hello, I'm a programmer with 9+ years of experience. I'm proficient in: Programming languages: C, C++, Python, Rust. Technologies/topics: Blender addon development; Excel/CSV processing; 3D-graphics programming; Bevy game engine; Arduino; usage and deployment of ML models.

Hi, I'm Nitesh! A highly skilled Virtual Assistant & Data Entry Expert with 19,000+ hours of experience and a proven track record of helping businesses increase efficiency, streamline operations, and manage data seamlessly. I’ve been active on Upwork for 55+ months, providing top-notch support to clients in real estate, eCommerce, SEO, and administrative tasks. My goal is your 100% satisfaction and I will give my 120% effort to deliver better than expected results. Moreover, I am completely organized, honest and hard-working. ✨ Why Hire Me? ✔ 19,000+ hours of hands-on experience with 100% dedication ✔ Highly organized, detail-oriented & efficient – no mistakes, just results ✔ Fast turnaround time – meeting deadlines without compromising quality ✔ Clear communication & professionalism – ensuring smooth collaboration I believe in delivering 120% effort to provide better-than-expected results. I’m also honest, reliable, and committed to helping you achieve your goals. 🔹 My Areas of Expertise: 📊 Virtual Assistance & Data Entry ✅ Data entry, spreadsheet management (Excel, Google Sheets) ✅ Web research, data collection, and lead generation ✅ Ad posting on Craigslist, job boards, and other commercial sites ✅ Clerical tasks: email handling, file organization, scheduling 🛍 Cold Email Expert ✅ Cold Email Campaign Setup (Domain Warmup + Inbox Setup) ✅ Lead Research + Verified Lead List Building (Manual + Tools) ✅ High-Converting Cold Email Copywriting (No Spam, No Templates) ✅ Advanced Email Deliverability & DNS Configuration ✅ Cold Email Automation via Instantly, Smartlead, Pipl.ai, Apollo & More ✅ Follow-up Management & Response Handling 🌐 SEO & Digital Marketing ✅ On-page & off-page SEO, link building, keyword research ✅ WordPress website management & content updates ✅ Social media assistance: scheduling posts, engagement, and community management 🏡 Real Estate Virtual Assistance ✅ Zillow Listings & Lead Downloads ✅ Property data collection & research ✅ Updating property details on ConnectedInvestor.com & MyHouseDeals.com ✅ CRM & database management for real estate professionals 🚀 How I Can Help You: 🔹 Need a reliable virtual assistant to handle administrative & data entry tasks? 🔹 Looking for an eCommerce specialist to manage product listings? 🔹 Want an SEO & digital marketing expert to grow your online presence? 🔹 Require real estate VA support for lead generation & property updates? I’m here to make your business more efficient, organized, and profitable while you focus on what truly matters. 📩 Let’s chat! Message me today, and let’s get started.

Need a WordPress website that looks professional, loads fast, and helps turn visitors into leads, bookings, or customers? I specialize in designing and building conversion-focused WordPress websites with Elementor Pro. My expertise is not general web development—it's creating high-quality Elementor websites that combine strong visual design, user experience, and business-focused structure. Whether you need a complete website, a website redesign, a high-converting landing page, or a pixel-perfect Figma to Elementor conversion, I focus on delivering websites that are easy to manage, responsive on every device, and built with long-term scalability in mind. My Core Expertise: • WordPress Website Design • Elementor Pro Website Design • Elementor Expert Development • Figma to Elementor Conversion • Figma to WordPress Implementation • Website Redesign • Landing Page Design • Responsive Web Design • WordPress Speed Optimization • Core Web Vitals Optimization • WooCommerce Page Design • UI/UX Implementation for WordPress • Conversion-Focused Website Design • Mobile-First Website Design What You Can Expect: ✔ Pixel-perfect Figma to Elementor builds ✔ Modern WordPress websites designed with Elementor Pro ✔ Conversion-focused landing pages for lead generation and paid traffic ✔ Clean, scalable Elementor structures that are easy to edit ✔ Fast-loading websites optimized for Core Web Vitals ✔ Responsive design across desktop, tablet, and mobile ✔ SEO-friendly page structure and best practices ✔ Website redesigns that improve usability and user experience Industries & Projects: • Business Websites • Agency Websites • SaaS Websites • Personal Brand Websites • Service-Based Businesses • Coaching & Consulting Websites • WooCommerce Product Pages • Marketing & Lead Generation Landing Pages Why Clients Work With Me: I combine design execution with conversion thinking. Every page is built with attention to hierarchy, spacing, user flow, call-to-action placement, and overall user experience. The goal is not simply to launch a website—it is to create a website that supports business growth. Keywords naturally aligned with my services include WordPress Designer, WordPress Website Designer, Elementor Expert, Elementor Designer, Elementor Pro Specialist, Landing Page Designer, Website Redesign Expert, Figma to Elementor Specialist, WordPress Speed Optimization, Responsive Website Design, WooCommerce Designer, and Conversion-Focused Website Design. Send me a message with your project details, and I'll recommend the most effective approach before we begin.

Backend Developer helping SaaS startups, agencies, and growing businesses build fast, secure, and scalable backend systems, secure APIs, fix performance issues, integrate third-party services, or turn your MVP into a scalable product. Whether you need a new API, a complete backend from scratch, bug fixes, database optimization, AI integration, or ongoing development support, I focus on delivering software that's built to perform today and scale with your business tomorrow. I look at the bigger picture - performance, maintainability, security, scalability, and the user experience behind every technical decision. MY CORE SERVICES: Backend Development: • Build scalable Node.js backends from scratch • Develop secure Express.js and NestJS applications • Design backend architecture for SaaS products • Build server-side logic for custom web applications • Develop microservices and modular backend systems • Optimize backend performance and reduce server response times REST API & GraphQL Development: • Build custom REST APIs for web and mobile applications • Design scalable API architecture • Connect React, Next.js, Flutter, or mobile apps to backend APIs • Develop GraphQL APIs for modern applications • Document APIs with Swagger/OpenAPI • Fix broken APIs, authentication errors, and integration issues API Integration: • Integrate Stripe, PayPal, Twilio, SendGrid, Google Maps, Firebase, and other third-party APIs • Connect OpenAI and ChatGPT APIs to existing applications • Build webhook integrations and automation workflows • Resolve API authentication and data synchronization issues Performance Optimization & Bug Fixing: • Fix Node.js, Express.js, React, and Next.js bugs • Optimize PostgreSQL and MongoDB queries • Improve API response times • Reduce application load times • Refactor legacy codebases • Troubleshoot production issues and deployment errors Full Stack Development: • Build full-stack web applications using React and Next.js • Convert Figma designs into responsive web applications • Build dashboards, admin panels, and customer portals • Add new features to existing products • Maintain and improve legacy applications AI Integration: • Integrate OpenAI APIs into web applications • Build AI-powered chatbots and assistants • Add AI automation to existing products • Develop intelligent workflow automation features TOOLS & TECHNOLOGIES: Backend: Node.js • Express.js • NestJS • JavaScript • TypeScript • Python • FastAPI Frontend: React.js • Next.js • HTML • CSS • Tailwind CSS • Bootstrap Databases: PostgreSQL • MongoDB • MySQL • Redis • Firebase Cloud & DevOps: AWS • Docker • Vercel • Railway • Render • GitHub Actions • CI/CD Tools: Git • GitHub • Prisma • Sequelize • TypeORM • Postman • VS Code • Jira • ClickUp • Slack • Notion WHAT YOU GET: ✔ Clean, scalable, and maintainable code ✔ Clear and proactive communication ✔ Reliable delivery and realistic timelines ✔ Well-documented solutions ✔ Security-first development ✔ Long-term support after launch ✔ Strong problem-solving mindset If you're looking for Backend Developer who can build a scalable Node.js backend, develop secure REST APIs, fix performance bottlenecks, integrate third-party APIs, optimize PostgreSQL or MongoDB databases, build or improve your SaaS application or maintain and scale your existing application, I'd love to help. Click the "Invite to Job" button or send me a quick message. I'll review your requirements, suggest the best technical approach, and help you build a reliable, scalable solution that supports your business goals.

With over 20 years of proven technical and creative experience, I bring a broad, practical background to every project. My work spans the full software development life cycle, systems design, workflow automation, business process improvement, data analysis, field operations, dashboards, reporting tools, AI-assisted applications, music production, video production, audio engineering, mixing and mastering, and audio editing. I specialize in solving complex, messy technical problems with practical systems that improve accuracy, visibility, and efficiency. I build internal business tools and automation systems using Python, JavaScript, HTML/CSS, Flask, FastAPI, AppSheet, Google Sheets, Google Apps Script, Airtable, Trello, REST APIs, JSON, CSV, SQL, SQLite, MySQL, data extraction, ETL workflows, web scraping, OCR, QA testing, data validation, dashboards, reporting systems, internal tools, workflow automation, API integrations, AI integrations, local LLMs, NLP tools, prompt workflows, document processing, and lightweight web applications. Recent work includes field service management apps, technician dispatch tools, gas replacement workflows, inspection apps, quality-control review systems, geospatial map dashboards, 911 incident data viewers, Trello automation tools, project management dashboards, local LLM/NLP utilities, data cleanup workflows, reporting tools, and operations dashboards. I enjoy projects where a client has scattered data, repeated manual work, unclear handoffs, disconnected tools, or spreadsheet-heavy processes and needs someone who can design a cleaner workflow, build the system, test it, document it, and explain it clearly. I am extremely customer-focused and enjoy creating clear, useful, customized solutions for each client. My ability to understand customer needs, translate complex requirements, and exceed expectations is one of the key strengths I bring to every project. I am especially useful when a project is not fully defined yet and the client needs help turning a real-world problem into a practical build plan. At Xcel Energy, I designed, wrote, and tested full-stack systems for mapping, project management, materials tracking, invoicing, field operations, quality review, and internal reporting. I reduced human entry error across several internal systems, integrated APIs, conducted large dataset analysis and standardization, and developed business logic to improve visibility, accuracy, and efficiency across multiple business areas. This work gave me direct experience with safety-sensitive operations, field crews, inspection workflows, vendor coordination, data integrity, process design, and decision-quality systems where accuracy mattered. Over 10 years at Apple, I developed strong leadership, communication, and technical training skills through roles involving executive escalations, customer-facing technical problem solving, documentation, discovery, training, and cross-functional coordination. Apple strengthened my ability as a public speaker, trainer, and technical translator, helping me explain complex technical concepts clearly to people at any level of technical experience. My experience also includes deep core drilling with HP Geotechnical, extensive work in gas and electric transmission and distribution, high-pressure gas systems, and cross-city distribution fiber optics. I also have hands-on experience in robotics and computer vision design with Cyber Motion, where I worked on autonomous navigation and path planning concepts. I have invented and designed solar systems to mine Bitcoin and generate DC heat for large battery systems. My engineering education in Java and C++ gives me a strong foundation for my technical work and a deep understanding of software structure, system behavior, debugging, architecture, and the full development life cycle. In addition to my technical skills, I am an effective communicator, public speaker, mentor, and technical translator. I am comfortable bridging the gap between technical and non-technical stakeholders, helping teams understand what is possible, what is risky, what should happen next, and how to move from idea to implementation. I can work directly with business owners, managers, field teams, engineers, vendors, and clients to clarify requirements and turn them into practical next steps. My work has consistently led to increased efficiency, reduced errors, better process visibility, cleaner data, improved workflows, and practical innovation across multiple environments. I am passionate about using technology to solve real-world problems and aligning technical execution with business goals. I also have a strong record of mentoring, training, and helping teams perform better. My approach to problem-solving is both analytical and creative, allowing me to handle complex systems while still designing tools that are understandable and useful for real people.

I help startup founders stay focused on growth by handling executive support and daily operations with structure, speed, and clear follow-through. For the past 3+ years, I’ve worked directly with US-based teams in fast-paced fintech and crypto environments (including Athena Bitcoin), supporting leadership with coordination, communication, and execution across remote operations. My strength is being the person who keeps things moving behind the scenes: • Calendar and inbox management with strong prioritization • Operational follow-up so nothing slips through the cracks • Team coordination across time zones and stakeholders • Building simple systems in tools like Notion, ClickUp, Airtable, or Google Workspace • Supporting client communication, documentation, and internal workflows In my previous operations work, I also coordinated multi-step logistics processes (vendor follow-ups, maintenance scheduling, cash handling workflows, and issue resolution across distributed teams), which trained me to stay calm, organized, and proactive under pressure. I’m currently pursuing an MBA and bring a mix of executive-level support, operational discipline, and business awareness to founders who need a reliable right-hand partner. If you’re looking for someone who executes fast, communicates clearly, and helps your business run smoother day-to-day, I’d love to support you.

Senior Full-Stack & AI Developer | React, Next.js, Node.js, Laravel | SaaS, AI Chatbots, LLM, RAG Systems With 6+ years of experience building scalable SaaS platforms, AI-powered applications, and high-performance web systems. I specialize in combining modern full-stack development with AI (LLMs, RAG, automation workflows) to help businesses reduce manual work, improve user experience, and scale faster. I have delivered 100+ projects including SaaS platforms, AI chatbots, automation systems, e-commerce apps, booking systems, and internal tools. My focus is clean architecture, performance, and production-ready systems that directly support business growth. Recent client feedback |⭐️⭐️⭐️⭐️⭐️ Abdul did an excellent job on my Supabase authentication task. His code structure was clean, well organized, and followed best practices. He completed the work ahead of schedule and communicated clearly throughout. Core Expertise Full-Stack Development ✅ React js, Next js (SSR, SSG) ✅ TypeScript, JavaScript ES6+ ✅ Redux, Zustand, Context API ✅ Tailwind CSS, responsive UI ✅ Node js, Express js ✅ PHP, Laravel ✅ Vue js, MERN stack AI & Automation (High-Value Skills) ✅ AI Chatbots (OpenAI, GPT-based systems) ✅ LLM integrations and custom AI workflows ✅ RAG (Retrieval-Augmented Generation) systems ✅ AI-powered SaaS applications ✅ Document-based Q&A systems ✅ AI email automation and lead qualification ✅ n8n / workflow automation (API-based systems) ✅ Prompt engineering and response control APIs & Integrations ✅ REST and GraphQL APIs ✅ Stripe, PayPal, Razorpay ✅ Firebase, Supabase ✅ Third-party APIs, webhooks ✅ Secure authentication (JWT, OAuth) Databases ✅ MongoDB ✅ PostgreSQL ✅ MySQL Infrastructure & Deployment ✅ AWS, DigitalOcean ✅ Vercel, Netlify ✅ Scalable cloud architecture AI + SaaS Solutions I Build ✅ AI chatbots for customer support & automation ✅ RAG-based systems (chat with documents, PDFs, knowledge bases) ✅ AI-powered dashboards and SaaS platforms ✅ Lead qualification & email automation systems ✅ Internal AI tools for business workflows ✅ GPT-powered features inside web/mobile apps Web, SaaS & Mobile Development I design and develop modern applications that are secure, scalable, and optimized for performance. ✅ Multi-tenant SaaS platforms ✅ Subscription-based systems ✅ Admin dashboards & analytics ✅ Real-time systems (chat, notifications, tracking) ✅ Booking, e-commerce, and management systems ✅ React Native apps (iOS & Android) What I Deliver ✅ End-to-end SaaS & AI application development ✅ Clean, scalable, and maintainable code ✅ API design & integrations ✅ AI system integration (LLM, RAG, automation) ✅ Performance optimization (SSR, caching) ✅ Long-term support & feature scaling Why Clients Work With Me ✅ Strong mix of AI + Full-Stack expertise (rare combination) ✅ Focus on business outcomes, not just code ✅ Clean architecture for long-term scalability ✅ Fast communication and reliable delivery ✅ Experience building production-ready SaaS systems Keywords: react developer, next js developer, node js developer, laravel developer, full stack developer, senior full stack developer, ai developer, ai chatbot developer, llm developer, rag developer, openai developer, gpt developer, ai automation, n8n developer, workflow automation, saas developer, saas application developer, web application developer, mern stack developer, typescript developer, react native developer, api integration expert, graphql developer, stripe integration, firebase developer, supabase developer, authentication expert, jwt authentication, multi tenant saas, subscription based saas, admin dashboard developer, real time applications, mongodb developer, postgresql developer, scalable architecture, aws developer, performance optimization, startup saas developer, enterprise web applications

🏆 Upwork Top Rated Professional 💼 60+ Successful Projects | ⏱️ 1000+ Hours Logged | ✅ 100% Job Success Rate 👨‍💻 Full Stack PHP Developer | 8+ Years of Experience Hi! I’m Vinod Dutt, a results-driven Full Stack Web Developer with over 8 years of experience delivering high-performance, scalable, and user-centric web applications. I bring deep technical expertise in: 🔹 Backend: PHP, Laravel, CodeIgniter 🔹 Frontend: React.js, TypeScript, Tailwind CSS 🔹 CMS/eCommerce: WordPress, WooCommerce 🔹 Server-side Tech: Node.js 🔹 Payment Gateway Integration: Stripe, PayPal, Razorpay & more I’ve successfully completed 60+ projects and logged over 1000 hours on Upwork with a 100% Job Success Rate – a testament to my dedication, communication, and quality of work. Whether you need a custom web app, a seamless eCommerce experience, or a robust backend system, I’m here to bring your ideas to life with clean code and efficient solutions. 💬 Let’s connect and build something amazing together!

🏆 French SEO Strategist | Top Rated + 100% Job Success | iGaming, Crypto & Fintech I help iGaming and crypto platforms dominate French-speaking SERPs, and stay there. With 10+ years of experience and 76 completed projects, I build AI-driven Topical Authority systems that turn content into compounding organic revenue. My clients have seen consistent double-digit traffic growth in hyper-competitive niches (casino, betting, crypto, Forex). ⚙️ What I deliver ✍️ French SEO Content (Native) Deeply researched, E-E-A-T-optimized articles for casino, sportsbook, crypto, and Forex platforms. Built for both traditional SERPs and AI-assisted search (SGE/GEO). 🎰 iGaming & Crypto Expertise Casino mechanics, slot reviews, crash games, bookmaker comparisons, crypto wallets, DeFi, trading guides. I write with operator-level accuracy that builds reader trust and drives conversions. 🤖 AI-Powered Topical Authority I architect semantic content silos (cocon sémantique) using AI-assisted workflows and tools like SurferSEO, ensuring your site becomes the definitive source Google recommends. 🌐 Full Editorial Stack From keyword mapping to WordPress publishing (Yoast, Rank Math), I manage the full content lifecycle, so you focus on your business, not your CMS. 📊 Proven Track Record Trusted by JohnnyBet, Bonuscode, Supertutobet, ParierFacile, JohnnyBitcoin, and Stribet, among the most competitive iGaming affiliates in the French-speaking market. 🤝 Why clients choose me • Native French, zero translation overhead, zero cultural mismatch • Top Rated + 100% Job Success across 76 projects on Upwork • Available across European time zones (CET-compatible) • Fast turnaround with transparent editorial calendar management Ready to build content that ranks, converts, and compounds? 📩 Send me a message, I'll review your current content gap within 24h. Landry Basile D.