I help startups build and launch SaaS products quickly using React, Next.js, and AI integrations. I focus on shipping production ready systems fast, not just writing code. I'm a type I person motivated by Intrinsic motivators such as a good challenge to solve, a never ending quest for excellence and the desire to learn each day something new. The creative process of putting an idea into reality and seeing how the solutions put into reality affect positively the lives of the people that use them gives me deep satisfaction. During my more than a decade long career in IT I had the opportunity to work with a range of technologies and accumulate experience in various areas. Chronologically, I did network administration and information security, desktop applications, mobile applications, web progressive apps and now I'm taking advantage of my wide experience by creating full stack solutions.

I am a software engineer with over 10 years of experience architecting and developing robust web systems across fintech, B2B SaaS, e-commerce, crypto, and AI-driven products. My expertise lies in backend APIs using Ruby on Rails, Node.js, and Python, alongside full-stack development with React and TypeScript. I excel in database performance optimization and CI/CD practices on AWS, ensuring scalable and efficient product delivery. I lead cross-functional teams through architecture design and code reviews while maintaining hands-on involvement in implementation. If you are looking for a reliable partner to build high-impact web applications that drive innovation and performance, let's discuss how I can contribute to your success.

🏆 Top Rated Developer on Upwork 🏆 "As a Senior Mobile Developer with expertise in Flutter and Firebase Development." About Me 🔹 Over 5 years of experience in Mobile Development, covering Android (Koitlin) and Flutter. 🔹 More than 4 years of experience in Flutter, from its early Alpha and Beta stages. 🔹 Successfully spearheaded development for various startups and projects of diverse scopes. 🔹 Founded my own tech startup, which has given me deep insights into the startup journey and mindset. 🔹 Proficient in transforming business requirements and ideas into fully functional software solutions. 🔹 Recognized for crafting scalable and reliable software solutions that empower businesses to thrive. 🔹 Lead the Flutter Instructor role for the Google Developers Student Club in my city. My Skills 🔹 Expertise in Flutter and Dart, encompassing mobile and web development. 🔹 Proficiency in Native Android development using Kotlin and Jetpack Compose. 🔹 Adept at creating responsive mobile designs. 🔹 Mastery of state management with Riverpod, Provider, MobX, and BloC. 🔹 Extensive experience with the Firebase Suite, including Firestore, Authentication, Storage, Cloud Functions, Crashlytics, Push Notifications, and more. 🔹 Proven capability in planning and constructing robust architectures of any size that can scale effortlessly. 🔹 Well-versed in Git version control. 🔹 Proficient in CI/CD processes using Codemagic, GitHub Actions, and Fastlane. 🔹 Skilled in providing Flutter training and mentorship. 🔹 Successfully delivered over 5 live Flutter apps, available on both App Store and Play Store. 🔹 Experienced in development lifecycle, sprint planning, and roadmap creation. 🔹 Proficient in leading sprints effectively. Why Choose Me? 🔹 Proficient in discussing, planning, developing, and launching apps for startups and SMEs. 🔹 Exceptional at translating business requirements into a feasible roadmap tailored to an organization's budget and timeline. 🔹 Apps I've contributed to have achieved over 50k+ downloads. 🔹 A Top Rated Plus Freelancer on Upwork. 🔹 Specializes in long-term contracts with highly satisfied clients (check my reviews). 🔹 Proven leadership skills and mentoring capabilities, with a track record of leading development teams to deliver outstanding apps within budget and on schedule. 🔹 Renowned for creating maintainable and scalable software solutions! 🔹 Founder of the Codvets Developer's Studio Thank you for reading through my comprehensive introduction. Please feel free to reach out, and let's explore how we can collaborate effectively.

Most businesses are still operating like it's 2022. I help them catch up - fast. I'm Dante, founder of Zodbyte -a Revenue-first AI automation and software engineering company. We build the systems, workflows, and custom AI integrations that let service businesses do more with less: less headcount, less manual work, less friction. What I actually deliver: - AI agents and custom automations that replace repetitive ops - Full-stack web apps and client portals (React, Node, Python) - CRM, billing, and ERP integrations that just work - Business process audits that identify exactly where AI can 10x output I don't just write code. I think in systems. My clients get leverage - tools and automations that keep working long after the project ends. Currently working with clients in the US and EU. If you're a service business owner who wants to move faster, automate the right things, and actually use AI as a competitive edge - let's talk.

I am a full-stack developer with over 7 years of experience in Ruby on Rails and React. I have developed, maintained, upgraded, enhanced, and led more than 60 Total Projects in a variety of sizes and industries. Certainly, proactive communication and code quality are the main factors I emphasize for Job Success. I help my customers solve their problems within their limits, bring better website with higher competitiveness and revenue. My PROFICIENCY and EXPERTISE: + Agile Method: Scrum, Kanban. + Knowledge Base: OOP, Design Patterns, MVC, MVP, Microservices. + Application Communication: Restful API, GraphQL, WebSocket. + Web App Framework: Ruby on Rails. + Authentication and Authorization RubyGems: devise, cancancan, rolify, omniauth, jwt, etc. + Other RubyGems: prawn, activeadmin, aasm, acts_as_list, whenever, etc. + Background Jobs: Rails Active Job, Sidekiq, Resque. + Real-time: Rails Action Cable, Firebase, Twilio, etc. + TDD and BDD: Rspec, Capybara, Selenium, etc. + Main Frontend Languages: HTML, CSS, JS. + UX, UI Responsive: Bootstrap, Tailwind, Jquery, etc. + SPA: React, Redux, React Router, etc. + React-based Framework: Next.js - SPA SEO resolution using SSR and SSG. + SQL and No SQL Database: PostgreSQL, MySQL, Redis, etc. + Search Engine: ElasticSearch, Algolia, etc. + Payment Gateway: Stripe, Braintree, etc. + Cloud Computing: Amazon Web Services, Heroku, Digital Ocean, Vercel, etc. + Linux-based: SSH, CronJob, Log Rotation, etc. + Web Server: Nginx, Apache. + Application Server: Puma, Passenger. + Deployment Script: Mina, Capistrano, etc. + CDN: Cloudflare, Cloudfront. + Mail Service: Mailgun, Mailchimp, Sendgrid, etc. + Web Tracking and Analytics: Newrelic, Rollbar, Bugsnag, Sentry, etc. + Other DevOps Skills: Git, Docker, CI/CD, DNS management, HTTPS SSL cert installation, Scaling, Load Balancing, etc.

Hello, I am Pavithra. Thanks for viewing my profile. I am a passionate FULL STACK DEVELOPER with 4+ years of experience in Web and Mobile Application Development. I have strong knowledge of software development lifecycle (SDLC) and I have developed SaaS-based Applications, E-Commerce Applications, E-Learning apps, Project Management dashboards, Travel-based Apps, etc. In my 3.5 years of Journey in the domain, I have gained traction over: 📌Developing responsive Web Design UI using HTML 5, CSS, Ajax, Angular, and Bootstrap. 📌Event-driven applications using AJAX, jQuery, JavaScript, JSON. 📌Designing and deploying API specifications (Swagger). 📌Experience in SOAP Web services, Restful web services, and JSON. 📌Creating AJAX calls to exchange information with MySQL. 📌Implementing a payment system using Stripe. 📌Troubleshooting the issues affecting production, staging, and development environments. 📌Tracking and solving tickets for defects on the bug reporting tool using Jira My Technical Expertise lies in: UI - ✔️CSS, ✔️HTML, ✔️Javascript, ✔️XML, ✔️JQuery Front End- ✔️React, ✔️Express, ✔️Angular, ✔️Bootstrap, Backend - ✔️Node.js Cloud Technologies - ✔️AWS, ✔️Docker API - ✔️Restful API, ✔️GraphQL API, ✔️JSON, ✔️Swagger Database - ✔️MySQL, ✔️PostgreSQL, ✔️NoSQL, ✔️MongoDB Code Versioning - ✔️GitLab, ✔️GitHub, ✔️BitBucket Project Management - ✔️Jira, Slack If you have any of the above-mentioned requirements, please contact me. I will be available at your service. Regards,

Hello Everyone I am a professional Web App Builder with over 6+ years of experience helping businesses bring their ideas to life online without the tech overwhelm. 𝐈 𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞 𝐢𝐧 𝐮𝐬𝐢𝐧𝐠 𝐦𝐨𝐝𝐞𝐫𝐧 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐥𝐢𝐤𝐞: 🌐 Webflow: Beautiful, responsive websites with clean design 🧩 Bubble.io: Custom web apps, CRMs, marketplaces, MVPs 📈 Go High Level: Funnels, automations, CRM setups for agencies and coaches Whether you are launching a startup, building a client dashboard, automating a sales funnel, or redesigning your business website I can build it fast, clean, and to the point. ✅ 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐃𝐨 𝐅𝐨𝐫 𝐘𝐨𝐮: - I can build custom web apps without code - I can create modern websites that convert - Set up CRM, funnels & automations in Go High Level - Connect tools using Zapier / APIs - Make sure everything works smoothly across devices ✅ 𝐖𝐞𝐛𝐟𝐥𝐨𝐰 – 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐖𝐞𝐛 𝐃𝐞𝐬𝐢𝐠𝐧 & 𝐂𝐌𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 - Design and build visually stunning, responsive websites with Webflow’s powerful visual editor - Convert Figma designs into pixel-perfect Webflow sites - Customize CMS Collections for dynamic content like blogs, portfolios, or product listings - Implement animations, interactions, and scroll effects - Setup of custom domains, SEO optimization, and fast hosting via Webflow - Integration with tools like Zapier, Airtable, and Memberstack for added functionality - Build landing pages, marketing funnels, and client dashboards without code - Ensure performance, mobile responsiveness, and accessibility ✅ 𝐁𝐮𝐛𝐛𝐥𝐞.𝐢𝐨 – 𝐅𝐮𝐥𝐥 𝐂𝐮𝐬𝐭𝐨𝐦 𝐖𝐞𝐛 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐖𝐢𝐭𝐡𝐨𝐮𝐭 𝐂𝐨𝐝𝐞 - Build advanced web applications, dashboards, MVPs, and marketplaces with a visual builder - Create user accounts, dynamic content, user roles, workflows, and data logic without traditional code - Develop complex apps like CRMs, job boards, booking systems, or SaaS platforms - Design responsive UIs with Bubble’s built-in editor - Setup of databases, APIs, and backend workflows - Payment gateway integration (Stripe, PayPal, Razorpay) - Deployment of mobile-friendly apps using Bubble wrappers (e.g. BDK, Natively) - Implement third-party services: Zapier, Airtable, Google Maps, Algolia, SendGrid, etc. - Add custom JavaScript or HTML when needed - Deliver scalable apps ready for investors or real users ✅ Go High Level – CRM, Funnel, and Automation Setup for Agencies & Coaches - Full setup of sales funnels, pipelines, calendars, and booking workflows - Create and optimize marketing automations for SMS, email, and DMs - Custom dashboard setup for real estate agents, coaches, digital marketers, and local businesses - Lead capture forms, surveys, landing pages, and conversion tracking - Integration with tools like Stripe, Mailchimp, Twilio, Facebook Ads, and more - Setup of reputation management, appointment reminders, and call tracking - Design white-labeled CRM dashboards for agencies or clients - Build branded funnels that rival ClickFunnels but at a lower cost and higher ROI - Automation of follow-up sequences using workflows and triggers - Reporting and analytics integration via Google Analytics and GHL reports ✅ 𝐋𝐚𝐧𝐝𝐢𝐧𝐠 𝐏𝐚𝐠𝐞𝐬 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 (𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐞𝐝 𝐭𝐨 𝐀𝐛𝐨𝐯𝐞 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬) - Build high-converting landing pages using Webflow, Bubble, or Go High Level - Set up lead capture forms, integrations, and thank-you pages - Automate lead nurturing with Zapier or native workflows - Connect apps like Calendly, Google Sheets, CRMs, Airtable, and email platforms - Implement funnels with clear CTAs and automated flows that convert visitors into leads 🕐 𝐅𝐚𝐬𝐭 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐲, 🤝 𝐂𝐥𝐞𝐚𝐫 𝐜𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧, 𝐚𝐧𝐝 💡 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐭𝐡𝐚𝐭 𝐰𝐨𝐫𝐤 𝐭𝐡𝐚𝐭'𝐬 𝐰𝐡𝐚𝐭 𝐈 𝐛𝐫𝐢𝐧𝐠 𝐭𝐨 𝐭𝐡𝐞 𝐭𝐚𝐛𝐥𝐞. 📞 Always available for a quick chat or call to discuss your project. Let’s build something awesome together! You can send job invitation so we can discuss more about work. Happy to work with you short term and long term projects.

Real-time data and AI that ship to production — and hold. Senior freelance data streaming & AI architect for real-time systems that must hold under load. 15 years building and fixing high-stakes platforms in trading, banking, telecom, e-gaming, and startups. I do this work, at the crossroads of data and AI, because I genuinely enjoy automating the painful, repetitive tasks that slow teams down. I design, stabilize, and modernize real-time backends and AI automations on Kafka with Java, Scala, or Python, on AWS or on-prem. I improve event streams, analytics APIs, live dashboards, and workflows — without blowing up latency, cost, or tech debt. When it makes sense, I add an AI layer (RAG for internal search or ops, for instance) with cost per request measured before scaling. If your backend is too legacy, I lead fast modernization via Strangler Pattern and microservices first. How we work together: · Assessment — root-cause diagnosis, blast radius, and the quickest credible fix, scoped and priced. · Proof Sprint — feasibility, quality, latency and real per-run cost measured, with a clear Go / No-Go before you commit to a build. · Build & Stabilise — migrate, harden or industrialise a validated system, with explicit scope, milestones and acceptance criteria. · Fractional CTO & Advisory — recurring senior direction on architecture, reliability, roadmaps, build-vs-buy and critical incidents. Typical outcomes: · 100K+ events/min at sub-300 ms latency (ESL) · €10M+/day production systems (Societe Generale) · 97% human-validated AI accuracy at ~€0.30 per case (ESL) · 2-hour workflow reduced to 5 minutes (ESL) · 75% unit-cost reduction (ESL) · 18× throughput on an Oracle-to-Cassandra migration (Thales) Experience built at Société Générale CIB, ESL, Thales and the European Parliament. Remote-first with CET/EU overlap and US coverage · vendor-neutral. You inherit systems that run: runbooks, tests, and ADRs, delivered through short iterations and prod-like prototypes. Got a real-time pipeline, a Kafka/cloud platform, a legacy migration, or production-grade AI to sort out? Send me a message and we’ll check fit on a short call. Stack: Kafka · AWS · RAG / LangGraph · Scala · Java · Python · Flink · Kafka Streams · Spark · Kubernetes · Terraform · gRPC · FastAPI.

Senior Software Engineer (17+ yrs) specializing in React Native, React/Next.js & TypeScript. I build fast, reliable apps—e-commerce, IoT, and mobile, leading migrations and performance overhauls end-to-end, from architecture to launch. I help product teams ship fast, stable, and scalable apps. My sweet spot is React Native + React/Next.js with TypeScript—owning the work from architecture to delivery and performance tuning (FPS/memory profiling, RN/Android tooling). • Led a phased replatform for a major US fashion retailer to Next.js + Commercetools Frontend (omnichannel, zero-downtime approach). • Tech Lead for a convenience/fuel chain’s React Native app—took it from MVP to production readiness. • Built IoT features for a global appliance brand (AWS IoT, MQTT) and hardened mobile UX under real-world network constraints. • Architected a tax-calculation module integrating Avalara / Stripe Tax, simplifying multi-provider compliance. Core skills React Native (Expo & bare) · React/Next.js (App Router) · TypeScript · Node/NestJS · AWS (Lambda, IoT, DynamoDB) · Cloudflare Workers · Algolia · Contentful/Contentstack · Commercetools · CI/CD · Performance profiling Also exploring: pragmatic AI integrations (LangChain, CopilotKit, OpenAI).

My name is Muhammed Doğancan Yılmazoğlu, and I am a frontend developer with a B.S. in Computer Engineering from Bilkent University. I specialize in creating responsive web applications using React, Angular,Next.js and many other libraries and frameworks. I’ve contributed to projects ranging from digital learning platforms to stock management systems and have starter-level full-stack development experience to increase my understanding of web development area.