If you've built an app on Replit, Lovable, Base44 or Bolt.dev, I'm the guy who takes it across the finishing line. Over the past 2 years I've helped numerous entrepreneurs and startup founders take their application from their low code environment to production. I know quirks of each of these platforms and what changes to make to the application codebase to make it ready for go-live. Using a combination of Replit, Base44, Lovable and Bolt.dev I've cut down the development and launch time of MVP's and POC's from weeks to days and in many cases to hours. A bit about me, I'm a full stack developer and a cloud architect with 14+ years of experience in developing SaaS platforms, web applications, REST and Graphql API's for both web and mobile. As a cloud architect I also manage end-to-end software development cycle using git workflows, cloud deployment on AWS and Azure (using Docker and Kubernetes), maintenance, upgrade, and disaster recovery. I have the innate ability to understand current business process or software system and design and build new software system that vastly improves upon the current state. I can also act as your temporary CTO for your SaaS startup during the critical period when you’re trying to launch your MVP or get your platform off the ground. What type of development do I do: ********************************* New development: As a SAAS developer and cloud architect I specialize in developing mission critical and practical applications (SAAS or custom software) for both established businesses and startups. I have extensive experience in pure web application as well as cross platform applications and have built several high traffic, low latency applications (for both mobile and web) that need to scale very well in real time. SAAS prototyping for MVP: I can do rapid prototyping of SAAS platforms and being a SAAS developer with extensive experience I ensure quick turnaround in minimal time and budget. Auditing and taking over development and maintenance of existing platforms: I have extensive experience in taking over an existing web/mobile applications, audits it, work on improvements and maintain the for the owner. Domains/industries across which I have extensive expertise are: ************************************************************************ • SAAS platforms for real estate and mortgage companies • Real time stock market applications • Real time geo-location platforms • Background system • Social media platforms with very low latency • ERP, CRM, newsletter platforms for marketing Personal strengths: ********************** # I am very good at understanding and deciphering complex business logic and solve them programmatically. I also have very good knowledge of algorithms. # I have extensive experience in handling large MYSQL database with high volume traffic. I can write optimized sql queries and can audit sql queries to fix slow running queries. # I have practical and in-depth knowledge about code quality, various testing (unit testing, security testing, stress testing). I am very comfortable in setting up full stack application on bare-bone servers. I am also very comfortable working on terminal. # I have extensive experience in working in remote team and leading multi-member teams and managing source code through assembla and Bit Bucket. I am comfortable at working in both supervised and unsupervised environment. Below are some areas I have gained expertise over the years ********************************************************** Programming Languages: Python, Javascript, Node.js, PHP, Golang Relational database: MYSQL, PostGresql Nosql databases: Mongodb, Couchdb, Cassandra Nodejs frameworks: Express.js, Nest.js, Hapi.js Python frameworks: FASTAPI, Django, Flask Golang frameworks: Gorilla PHP frameworks: YII, CakePHP, Symfony2, Codeigniter Design tools: MYSQL workbench, Freemind, Visio, Pencil Internet protocols: HTTP, TCP/IP, SSL/TLS, POP3, IMAP I love to help people and am available for free 20 minutes consultation for most of the time. Drop me a message!

I help startups, SMEs, and enterprises turn complex business workflows into smooth, reliable digital products. With over 7 years of experience, I specialize in cross-platform mobile apps, web applications, ERP/CRM integrations, and custom CMS solutions that are secure, scalable, and user-friendly. Mobile App Development: - UI/UX design aligned with conversion-focused, human-centered experiences - Cross-platform apps with Flutter & React Native, featuring AI integrations, chatbots, automation, AI-assisted coding tools, and intelligent user experiences. - Native iOS & Android development (Swift, Kotlin, Java) - API integration & orchestration with existing backends - Real-time sessions, payments, and mission-critical workflows - App Store & Play Store deployment, optimization, and updates Full-Stack Web Applications: - Frontend with React, Next.js; Backend with Node.js, Express, PHP & Laravel - Custom dashboards, admin panels, and reporting systems - Database design & integration (MySQL, PostgreSQL, MongoDB, Firebase) - Secure, production-ready systems tailored for complex workflows Web Design & CMS Development: - Responsive websites on WordPress, Wix, Webflow, Shopify, Squarespace - Conversion-driven layouts and optimized user experiences - Integration with existing business systems for seamless operations Why Work With Me: - Top-rated freelancer with consistent 5-star client reviews - Experienced in orchestrating multiple backends into one coherent user experience - Clear communication, structured discovery, and proactive problem-solving - Long-term partnership approach! I don't just deliver results - I build trust that lasts beyond the project. If you’re building a cross-platform app, web system, or custom platform that connects multiple backends, handles payments, sessions, and user identity reliably, I can help you simplify complexity and deliver a polished, production-ready product. Let's connect - I am just a message away!

I build AI-powered web platforms that ship to production chatbots, RAG systems, and full stack applications your team can actually run and scale. 2,000+ hours delivered on Upwork. 100% Job Success Score. Top Rated Plus. Every project below is verified and live. What I build: → AI Chatbots & Assistants (OpenAI GPT-4, custom knowledge base, Twilio voice integration) → Full Stack Web Applications (React, Next.js, FastAPI, Node.js, PostgreSQL) → RAG Pipelines & Document Intelligence (LangChain, vector search, embeddings) → AI Integration into existing platforms (CRM, database, API workflows) → Mobile App Deployment (App Store, Google Play, React Native) Verified production work on Upwork: → AI Chatbot platform — OpenAI + AWS + Python + Postgres (312 hrs) → AI Emergency Assistant — OpenAI + Twilio + custom knowledge base (192 hrs) → Full web platform with AI features (603 hrs) → React + FastAPI + SQL senior full stack delivery (68 hrs) → App Store + Google Play deployment (102 hrs) → Ongoing platform management & development Stack I work with daily: OpenAI GPT-4 · Python · FastAPI · React · Next.js · Node.js · PostgreSQL · LangChain · AWS · Django · Twilio If you need it built right and shipped on time send an invite.

I'm a full-stack MERN developer building web and mobile applications with integrated AI capabilities. I work across the entire stack React/React Native frontends, Node.js/Express backends, and MongoDB data layer, delivering products that are fast, scalable, and production-ready. My recent focus has been on embedding AI into traditional applications: intelligent automation, ChatGPT/OpenAI integrations, and AI-assisted workflows that solve real business problems rather than just adding AI as a buzzword. What I've built: A fully decentralized prediction and gaming platform ranked top 7 globally, featuring AMM-based pricing, public/private pool creation, and a live gaming suite processing $25M+ in volume A crypto launchpad ranked top 10 globally that has raised $220M+ for projects worldwide, with tier-based allocations, vesting schedules, and community-driven token launches A ZK-based privacy protocol that raised $160M+ in presale, enabling selective on-chain data disclosure using zero-knowledge proofs A multi-chain AI crypto wallet with 50k+ active users, featuring cross-chain swaps, token management, and integrated AI assistance An AI-powered business automation platform that streamlines operations, customer interactions, and workflow management through intelligent AI agents bridging Web3 infrastructure with enterprise-grade automation A Web3 super app with 1M+ downloads, delivering a full DeFi and crypto ecosystem in a single mobile application What I deliver: Full-stack web apps (MERN: MongoDB, Express, React, Node.js) Cross-platform mobile apps (React Native) AI integration (OpenAI API, LangChain, custom automation agents) UI/UX design and implementation, from wireframe to polished product API development & third-party integrations I prioritize clear communication, realistic timelines, and clean documented code. Let's build something great. Message me to get started.

I build WordPress and Shopify sites that load fast, convert visitors, and hold up as you scale. Over 7 years I've shipped custom themes, plugins, WooCommerce stores, and LMS platforms for B2B and B2C brands across the USA, UK, Canada, and Europe. I’m a Full-Stack Web Developer with 7 years of hands-on experience crafting high-performance websites tailored to business goals. Whether you’re starting from scratch or need advanced customization, I provide scalable, secure, and future-proof solutions. I also handle something most developers can't: migrating AI-generated builds (Lovable, Figma) into clean, production-ready WordPress and Shopify. 💼 My Services Include: ✅ AI-to-WordPress and Shopify migration - Lovable/Claude/Figma builds turned into real WordPress and Shopify sites ✅ Website Design & Development - From clean UI/UX design to fully functional WordPress sites, I bring your vision to life with responsive, modern, and user-friendly design. ✅ Custom WordPress Development - From pixel-perfect themes to advanced plugin functionality, I develop custom solutions that align with your brand and business logic. ✅ WooCommerce / eCommerce Solutions - I build and customize robust online stores that are fast, secure, and optimized for conversions—perfect for growing your eCommerce business. ✅ LMS (Learning Management System) Development - Build feature-rich online course platforms using tools like LearnDash, Tutor LMS, or fully custom solutions tailored to your educational goals. ✅ Listing / Booking / Appointment-Based Website Development - I develop directory, service listing, and appointment booking platforms with seamless scheduling, payment integration, and user management features. ✅ WordPress Security & Performance Optimization - Harden your site against vulnerabilities and ensure blazing-fast performance with expert-level optimization and cleanup. ✅ Bug Fixes & Website Maintenance - Reliable ongoing support, troubleshooting, and maintenance to keep your website secure, updated, and running smoothly. Why Partner with Me? ✔ 7+ Years of Proven WordPress Development Experience With a strong background in full-stack WordPress solutions, I bring deep technical knowledge and real-world problem-solving to every project. ✔ Business-Focused & Results-Driven My approach is client-centric—every line of code and design decision is aligned with your business objectives, helping you achieve measurable results. ✔ Reliable Communication & Transparent Process Expect clear, timely communication and full transparency throughout the development process. I’m committed to meeting deadlines and exceeding expectations. ✔ Global Clientele & Cross-Cultural Experience I’ve successfully delivered projects for clients across the USA, UK, Canada, and Europe, providing scalable and tailored web solutions to meet diverse business needs. 💡 I offer a free consultation to understand your project goals and provide expert guidance on how my Web development services can help you achieve them efficiently.

“When you work with me, we share one goal: maximizing your ROI.” I am a Digital Marketing Specialist with 7+ years of experience helping businesses grow through SEO, Social Media Marketing, Paid Ads, and Content Strategy. I focus not just on rankings, but on delivering real results—traffic, visibility, and conversions. My approach also includes optimizing for AI-driven search platforms (like ChatGPT & AI search results) to help your business stay ahead. What I specialize in: ✅ SEO (Technical, On-Page, Off-Page) ✅ SEM (Google Ads & Paid Campaigns) ✅ SMM (Growth, Engagement & Strategy) ✅ Marketing Strategy & Funnel Planning ✅ Content Writing (Blogs, Ads, Website Content) ✅ Online Reputation Management (ORM) ✅ WordPress & Website Optimization How I work: I combine my experience with in-depth research of your business, competitors, and target audience to build strategies that drive measurable growth. What you can expect: ✔ Data-driven strategies ✔ Clear communication & reporting ✔ White-hat, long-term growth approach ✔ Focus on ROI and conversions Let’s connect and grow your business the right way 🚀

⭐️⭐️⭐️⭐️⭐️ “Oscar took our entire digital presence to the next level. From rebuilding our Shopify store to running effective Google and Meta ads, and dialing in our email and SMS marketing, every piece worked together seamlessly. We saw higher conversions, more sales, and finally had a growth strategy that made sense.” - Monica, Kole Beauty Products 🚀 Build, Scale, and Convert ... With One Expert Partner I'm Oscar Guerrero, a full-stack developer and performance marketer helping brands turn clicks into customers through high-converting websites, revenue-driving email flows, and paid media that scales profitably. With 10+ years of experience, I bring not just technical chops but a strategic brain to every project. Whether you're launching, optimizing, or scaling ... I can help you grow smarter, not just louder. 💼 What I Specialize In: E-commerce Web Development • Custom Shopify Stores & Theme Tweaks • WordPress & WooCommerce Builds • Webflow Sites with CMS + Animations Email & SMS Marketing • Klaviyo (Omnisend, Yotpo) Flows (Welcome, Abandon, Winback, Post-Purchase) • Campaign Strategy + Creative • Deliverability, Segmentation, and LTV Growth Paid Media & Acquisition • Facebook/Meta Ads: Full-Funnel Strategy & Testing • Google Ads: Search, Display, PMax Campaigns • Retargeting, Lookalikes, UGC Creative Strategy Conversion Rate Optimization (CRO) • A/B Testing, Session Replay Insights • Funnel Audits, Offer Optimization • UX Design for Higher AOV B2B Lead Gen & Sales Enablement • Cold Outreach Strategy • CRM Setup, Automation & Nurture Flows • B2B Caller for Discovery & Demo Booking 📈 What I Deliver: ✅ Lightning-Fast, Mobile-First Shopify Sites ✅ Pixel-Perfect Webflow Builds with Seamless UX ✅ Revenue-Driving Email Automations & Campaigns ✅ Profitable Google & Meta Ads with Strong ROAS ✅ Systems for Scaling - From Traffic to Retention 🎯 Who I Work Best With: • DTC & E-commerce Brands Ready to Scale • Founders Needing a Tech + Marketing Brain • Startups Seeking Conversion-Focused Websites • B2B Brands Looking for Qualified Lead Systems • Agencies in Need of a Reliable White-Label Partner 💡 Why Clients Choose Me: ✔ Proven track record of increasing revenue & conversions ✔ Data-driven strategy meets clean, modern execution ✔ Klaviyo Partner + Meta & Google Ads certified ✔ Excellent communication & fast turnaround ✔ U.S.-based, Payment Verified, and highly responsive Let’s create something that drives real growth — not just traffic. 📞 Available for fixed projects or monthly retainers. Email Marketing • Klaviyo Expert • Shopify Email Strategy • Email Flow Setup • Campaign Management • Email Copywriting • Email Design • SMS Marketing • Shopify Integration • Abandoned Cart Flow • Welcome Flow • Post-Purchase Flow • Email List Growth • Ecommerce Retention Marketing • Email Audit • Deliverability Optimization • Email Expert • Google Ads • Meta Ads

I help ecommerce and service-based businesses turn paid ads into a predictable source of sales, qualified leads, and revenue growth across Meta Ads, Google Ads, and TikTok Ads. With 5+ years of paid advertising experience, a Master’s degree in Marketing, Meta Ads Certification, and 100+ completed client projects, I build and optimize full-funnel paid advertising systems focused on profitable growth, clean tracking, creative testing, and scalable performance. Most businesses do not struggle because they need “more ads.” They struggle because the full system is not working together: weak tracking, unclear campaign structure, poor creative testing, low-quality traffic, or a funnel that does not convert. My job is to find what is blocking growth, fix it, and build a paid ads system that can scale with confidence. What I can help you with: • Meta Ads campaign strategy, setup, optimization, and scaling • Google Ads Search, Shopping, Performance Max, Display, and YouTube campaigns • TikTok Ads campaign setup, creative testing, retargeting, and scaling • Ecommerce sales campaigns for Shopify and other online stores • Lead generation campaigns for service-based businesses • Full account audits to identify wasted spend and growth opportunities • Audience, competitor, keyword, and market research • Creative strategy, including hooks, angles, ad copy, UGC direction, and testing plans • Pixel, CAPI, GA4, GTM, UTM, and conversion tracking review • Retargeting and full-funnel campaign structure • Weekly optimization, reporting, and clear performance recommendations Common problems I help solve: • Ads are spending but not generating enough sales or leads • ROAS is unstable or too low • CPA is too high • Lead quality is poor • Tracking is inaccurate or incomplete • Campaigns lack structure and testing logic • Creatives are not converting or have stopped working • Google, Meta, or TikTok campaigns are not scaling profitably My approach: First, I review your current ads account, tracking, funnel, creatives, and offer. Then I identify where budget is being wasted and what needs to be fixed first. After that, I build or optimize your campaign structure, improve the testing process, and use real performance data to scale what works. I do not focus on vanity metrics. I focus on the numbers that matter: revenue, qualified leads, ROAS, CPA, conversion rate, and long-term profitability. Results my clients typically work with me for: • 2x–7x ROAS improvement • 20–40% CPA reduction • Higher add-to-cart, checkout, purchase, and lead conversion rates • Better lead quality and more predictable CPL • Clearer tracking and reporting • Stronger creative testing and campaign scaling process Why clients choose me: • I combine paid ads strategy with real marketing and business thinking • I understand both performance data and creative psychology • I can work across Meta Ads, Google Ads, and TikTok Ads, not just one channel • I make tracking and reporting clear, so decisions are based on real numbers • I communicate proactively and explain what is happening in the account • I focus on sustainable growth, not short-term hacks If you are looking for a paid ads specialist who can audit your current setup, improve your campaign performance, and build a clear strategy for growth across Meta, Google, and TikTok, send me a message. I can review your account and show you where the biggest opportunities are.

With over 10 years of diverse experience in software development, I have done it all — from development to team leadership. I am proficient in in building high-quality mobile applications and have strong expertise in Flutter, Android, and iOS app development, along with frontend and backend systems. My expertise spans multiple industries, and I’ve had the opportunity to work with remarkable companies from around the world. I have experience with a wide range of technologies and tools, which I’ve used to build some truly amazing applications. My Services: - MVP | Startup Launch | Product Growth Consulting - Flutter App Development - Android & iOS App Development - Cross-Platform Mobile App Development - Tech Consulting & Product Strategy - Backend Development & Firebase Integration My Expertise: • Flutter App Development • Android & iOS Development • Cross-platform mobile applications • Firebase integration • REST API integration & backend collaboration • App performance optimization • Bug fixing & legacy app improvements • Play Store & App Store deployment • Ongoing app maintenance & feature development • UI/UX implementation & responsive design Who I work with: Startups – take your idea through the startup lifecycle within a reasonable budget and timeline. Small and Medium Businesses – acquire software excellence to boost your current product. Working with me, you will get: - Transparent process with various tracking tools and regular meetings. - Prompt responses and concise explanations. - Expert consulting and tailored advice based on your specific needs. - Smooth integration with existing workflows and effective collaboration with your team. - Flexibility to work with clients across different time zones, from San Francisco to London. - Thorough documentation and dedicated support throughout the transition period. Have questions or need guidance? Feel free to invite me for a discussion!

🚀 Top-Rated Plus Mobile app Developer with 10+ Years of Mastery📱 ♦♦ RoomPlan/FloorPlan Api expert ♦♦ 3D Object Scanning and AR Innovator ♦♦ ARKit, ARCore, Point Cloud, 3D Mesh expert ♦♦ 2D Floor plan to 3D Floor plan converter ♦♦ Lidar and 3D object scanning and modeling via Photogrammetry I am an experienced seasoned Mobile developer having expertise in Android & iOS Mobile apps for my overseas clients. Having 12+ years of development experience in website & mobile app development for clients all over the world using the latest tech stack in different verticals. Quality and on-time delivery of the project makes my client more happiest and help to build long-term relationships with them. -----Why Choose Me---- ✅ High-Quality Work ✅ Cost-Efficient Services ✅ Fluent English ✅ 12 Years Of Experience ✅ Long term working relationship ✅ Experience with developing Web and Mobile ChatBots ✅ Experience with Serverless Architecture (AWS, Google Cloud and Azure). ✅ Strong project management skills and maintaining on-time quality deliveries. ✅ Experience of Agile (Xtreme programming, SCRUM), waterfall and other software processes and standards. Technologies: *️⃣ Augmented Reality *️⃣ ARKit, ARCore *️⃣ Lidar Technology and 3D object scanning and modeling via Photogrammetry *️⃣ Point Cloud, 3D Mesh *️⃣ Native iOS, Swift, Swift UI, Objective C, Swift. *️⃣ Native Android, Android Studio, Java, Kotlin. *️⃣ Hybrid platforms- Ionic, Cordova. *️⃣ Cross Platform- React Native, Flutter, Dart. *️⃣ SDK development- iOS and Android *️⃣ AWS, Google Cloud, Firebase, authentication, analytics, API development, cloud functions, serverless computing. ----Developed projects for various Businesses ---- ✅ ELearning & Education ✅ Real Estate and Construction ✅ Restaurant & Food delivery ✅ Bus, Taxi and Ride booking Apps ✅ Fintech & wallet Apps ✅ Online Dating application ✅ Healthcare Application ✅ Social media Application Thanks for your time visiting my profile. Please feel free to reach out if you are interested in discussing your project. Let's connect and discuss with details. Also check My previous client feedback to measure my capabilities and the service. Best regards Shailendra Borse