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Oleg K.

Cascais, Portugal

$38/hr
4.9
66 jobs

๐Ÿ“ React Native development for production mobile apps ๐Ÿ“ Full stack engineering for complex backend systems ๐Ÿ“ AI Agent Development for automation and intelligent workflows For more than 11 years, Iโ€™ve been working in mobile app development and full stack development, delivering scalable web platforms, high-performance mobile apps, and modern AI-driven systems. This combination allows me to build products end-to-end, from mobile UI to backend architecture and AI logic. ๐Ÿ“ฑ Mobile App Development & React Native Expertise As a React Native developer, Iโ€™ve built and scaled mobile applications used in fintech, real estate, healthcare, marketplaces, and social platforms. My mobile app development experience includes: - Cross-platform iOS and Android apps - Complex user roles and permissions - Real-time features (chat, live updates, tracking) - High-load backend integrations - Clean architecture designed for long-term growth One of my key projects Breeze, a real estate mobile platform was developed end-to-end as a full stack developer and later raised $3M+ in investments. That experience strongly shaped how I approach architecture, scalability, and product quality. ๐Ÿค– AI Agent Development & Automation In parallel with product engineering, I focus heavily on AI Agent Development. As an AI Agent Developer and AI Automation Expert, I design systems that go far beyond simple chatbots. I build: - AI agents with planner-executor architecture - Multi-agent systems with task orchestration - AI chatbots connected to business data - AI automation pipelines for operations, research, and analytics - RAG systems using embeddings and vector databases These AI agents are designed to interact with real systems, APIs, CRMs, databases, internal tools, and operate as part of a real product ecosystem. My goal is always the same: turn AI from an experiment into a reliable, controllable product component. ๐Ÿ”— Where AI meets Full Stack Development What makes my approach different is the combination of: AI Developer + Full Stack Developer + Mobile App Developer This means: - AI agents integrated into web platforms - Mobile apps powered by AI logic - Backend services managing agent execution - Dashboards for monitoring and control - Secure and scalable infrastructure Instead of isolated AI tools, clients get complete AI-powered products. ๐Ÿ’กClients usually come to me when they need: - A senior engineer who understands product logic - A CTO-level partner, not just a coder - Clean architecture from day one - Systems prepared for growth, investment, and scale Thatโ€™s why many clients stay long-term and treat me as a technical partner, not a temporary freelancer.

  • React Native
  • Smartphone
  • Mobile App Development
  • React
  • iOS Development
  • Android App Development
  • JavaScript
  • Node.js
  • Software Development
  • Android
  • AI Chatbot
  • API Integration
  • AI Development
  • MongoDB
  • PostgreSQL
  • Front-End Development
  • Back-End Development
  • Web Development
  • Firebase
  • LangChain
Mykhailo K.

Cascais, Portugal

$45/hr
5.0
65 jobs

๐Ÿ’ผ 8+ years of Full Stack Development experience with strong expertise in Software Architecture ๐ŸŒ 120+ projects delivered for clients in the US, Canada, Europe & the Middle East ๐Ÿ’ฐ 20M+ in client revenue generated through high-performance web apps ๐Ÿš€ 40+ SaaS platforms & 12 HR solutions successfully launched ๐Ÿ“ฑ Dozens of responsive Progressive Web Apps (PWA) delivered โญ 5-Star ratings across all projects I lead a team building scalable web, mobile, and SaaS products for startups and growing businesses. With React, React Native, and Node.js developers alongside UI/UX and Product Designers, we own the full product lifecycle - from MVP to stable production - delivering full-stack solutions built for long-term velocity and measurable business outcomes ๐Ÿš€ ๐— ๐—ฉ๐—ฃ & ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜๐˜‚๐—ฝ ๐—ฃ๐—ฟ๐—ผ๐—ฑ๐˜‚๐—ฐ๐˜ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ We help founders move fast without sacrificing quality through agile full-stack development, mobile development, and React Native Developer workflows. Every MVP starts with a UX Designer and Product Designer working through user flows, wireframing, and prototyping in Figma before a single line of code is written. Our focus is on: ๐ŸŽฏ Turning ideas into working MVPs, building investor-ready demos, and launching beta products quickly ๐—ข๐˜‚๐—ฟ ๐˜๐—ฒ๐—ฎ๐—บ ๐—ฑ๐—ฒ๐—น๐—ถ๐˜ƒ๐—ฒ๐—ฟ๐˜€: โœ… Rapid MVP development (User Interface Design โ€“ Frontend โ€“ Backend) โœ… UX flows, wireframing, and prototyping by our Figma Designer team โœ… Production-ready code with React, Next.js, TypeScript, React Native, and Swift โœ… Secure third-party integrations (Stripe, Firebase, Auth0, Twilio, Google Maps) โœ… Clean, scalable architecture designed for long-term growth and SaaS solutions As a Full Stack Developer SaaS team, we've helped startups raise funding and scale from MVP to 100,000+ users - and as a React Native Developer partner, we ensure your mobile product ships with the same precision as your web platform ๐Ÿ’ป ๐—ช๐—ฒ๐—ฏ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ Our React Frontend Developers, React Developers specializing in Next.js, and Node Developers work together to build fast, scalable web applications across the full stack - optimizing Core Web Vitals to achieve 95+ Lighthouse scores and 35% bundle reductions on Next.js TypeScript projects, because performance is never an afterthought. ๐Ÿ”น Front-End: React.js, Next.js, TypeScript, JavaScript (ES6+), HTML5, CSS3, Tailwind CSS ๐Ÿ”น Back-End: Node.js, NestJS, Express.js (REST & GraphQL), PostgreSQL, MongoDB, MySQL ๐Ÿ”น CMS & Headless: Sanity, Contentful, Strapi This collaboration between React Frontend Developers and Node Developers ensures clean, scalable code - a foundation especially critical for SaaS platforms and enterprise B2B products ๐Ÿ“ฑ ๐— ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ ๐—”๐—ฝ๐—ฝ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ Our React Native Developers build mobile applications optimized for real-world usage, starting with UX mapping and UI design before development begins. As a Full Stack Developer, React Node team, we handle everything from UI to server-side logic: ๐Ÿ”น React Native Developer Expo workflow for fast cross-platform delivery ๐Ÿ”น Swift & SwiftUI for native iOS apps ๐Ÿ”น Firebase, push notifications, analytics ๐Ÿ”น App Store deployment and optimization ๐Ÿ”น Offline mode, multi-language support, battery efficiency Our approach enables rapid iteration and production-ready releases, with Node.js powering smooth mobile-backend communication โ˜๏ธ ๐—–๐—น๐—ผ๐˜‚๐—ฑ, ๐——๐—ฒ๐˜ƒ๐—ข๐—ฝ๐˜€ & ๐—ฆ๐˜†๐˜€๐˜๐—ฒ๐—บ ๐—”๐—ฟ๐—ฐ๐—ต๐—ถ๐˜๐—ฒ๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ Our Full Stack Developer React Node team designs and maintains reliable, production-ready infrastructure: ๐Ÿ”น AWS: Lambda, EC2, S3, CloudFront, RDS, Docker, Kubernetes, Terraform ๐Ÿ”น CI/CD pipelines (GitHub Actions, GitLab CI) ๐Ÿ”น Monitoring & logging (Sentry, Prometheus, Grafana) The goal: stable deployments, predictable scaling, and minimal downtime - essential for any serious Full Stack Developer SaaS platform handling real user load ๐ŸŽจ ๐—จ๐—œ/๐—จ๐—ซ ๐——๐—ฒ๐˜€๐—ถ๐—ด๐—ป & ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ Our UI/UX Designers and Product Designers approach design as a core part of the product, not a decorative layer, working closely with Full Stack Developers so what gets built matches what was designed, pixel for pixel. Our Figma Designer workflow covers: ๐Ÿ”น Product discovery & UX research ๐Ÿ”น Wireframing and prototyping ๐Ÿ”น Design systems and UI kits ๐Ÿ”น Interface design across web and mobile ๐Ÿ”น Accessibility (WCAG), responsive layouts ๐Ÿค ๐—›๐—ผ๐˜„ ๐—ช๐—ฒ ๐—ช๐—ผ๐—ฟ๐—ธ ๐Ÿ”น Direct communication with our React Developers, React Native Developers, Full Stack Developers Node.js, UI/UX Designers, and Product Designers - no middle layers. As a dedicated Full Stack Developer React Node, and SaaS team, we bring every layer of the product under one roof: ๐Ÿ”น Clear estimates and agile delivery ๐Ÿ”น Clean, maintainable code ๐Ÿ”น Secure API integrations with type safety in Next.js/TypeScript ๐Ÿ”น Design and development moving together. Reliable products built by a team that understands both business goals and technical execution

  • React Native
  • Mobile App Development
  • React
  • Node.js
  • JavaScript
  • Web Application
  • Web Development
  • Mobile App
  • Web Design
  • NestJS
  • API Development
  • Full-Stack Development
  • Next.js
  • TypeScript
  • API Integration
  • AI App Development
  • AI Development
  • Database Architecture
  • Python
  • Automation
Kyrylo S.

Lisbon, Portugal

$40/hr
5.0
37 jobs

๐Ÿš€ Is your MVP taking months instead of weeks? ๐Ÿ’ก Tired of developers who donโ€™t understand your business and just write code? I help startup founders launch production-ready MVPs in ๐Ÿฎโ€“๐Ÿฏ ๐˜„๐—ฒ๐—ฒ๐—ธ๐˜€, using a clear, ๐—ฏ๐˜‚๐˜€๐—ถ๐—ป๐—ฒ๐˜€๐˜€-๐—ผ๐—ฟ๐—ถ๐—ฒ๐—ป๐˜๐—ฒ๐—ฑ development approach. As an Upwork Expert-Vetted React Front End Developer with a Masterโ€™s in Computer Science and 7+ years of experience building scalable SaaS platforms, dashboards, and custom APIs, I translate complex tech into clear product decisions that drive results. Iโ€™ve worked with startups from idea stage to Series B, as well as enterprise clients like ๐—ฆ๐—ฎ๐—บ๐˜€๐˜‚๐—ป๐—ด, ๐—›๐—ผ๐—ฟ๐—ถ๐˜‡๐—ผ๐—ป๐˜€, and ๐—•๐—ฒ๐—ป๐˜๐—น๐—ฒ๐˜† - always focusing on fast delivery, clean architecture, and measurable outcomes. ๐Ÿ’ฌ Clientsโ€™ Feedback: โ€œ๐˜Ž๐˜ณ๐˜ฆ๐˜ข๐˜ต ๐˜ฆ๐˜น๐˜ฑ๐˜ฆ๐˜ณ๐˜ช๐˜ฆ๐˜ฏ๐˜ค๐˜ฆ ๐˜ธ๐˜ฐ๐˜ณ๐˜ฌ๐˜ช๐˜ฏ๐˜จ ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜’๐˜บ๐˜ณ๐˜บ๐˜ญ๐˜ฐ! ๐˜๐˜ฆ ๐˜ฅ๐˜ฆ๐˜ญ๐˜ช๐˜ท๐˜ฆ๐˜ณ๐˜ฆ๐˜ฅ ๐˜ข ๐˜ฉ๐˜ช๐˜จ๐˜ฉ-๐˜ฒ๐˜ถ๐˜ข๐˜ญ๐˜ช๐˜ต๐˜บ ๐˜™๐˜ฆ๐˜ข๐˜ค๐˜ต + ๐˜›๐˜บ๐˜ฑ๐˜ฆ๐˜š๐˜ค๐˜ณ๐˜ช๐˜ฑ๐˜ต ๐˜ง๐˜ณ๐˜ฐ๐˜ฏ๐˜ต๐˜ฆ๐˜ฏ๐˜ฅ ๐˜ด๐˜ต๐˜บ๐˜ญ๐˜ฆ๐˜ฅ ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜›๐˜ข๐˜ช๐˜ญ๐˜ธ๐˜ช๐˜ฏ๐˜ฅ ๐˜Š๐˜š๐˜š, ๐˜ฃ๐˜ถ๐˜ช๐˜ญ๐˜ต ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜ค๐˜ญ๐˜ฆ๐˜ข๐˜ฏ ๐˜ค๐˜ฐ๐˜ฅ๐˜ฆ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ด๐˜ต๐˜ณ๐˜ฐ๐˜ฏ๐˜จ ๐˜ข๐˜ต๐˜ต๐˜ฆ๐˜ฏ๐˜ต๐˜ช๐˜ฐ๐˜ฏ ๐˜ต๐˜ฐ ๐˜ฅ๐˜ฆ๐˜ต๐˜ข๐˜ช๐˜ญ. ๐˜Š๐˜ฐ๐˜ฎ๐˜ฎ๐˜ถ๐˜ฏ๐˜ช๐˜ค๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ ๐˜ธ๐˜ข๐˜ด ๐˜ด๐˜ฎ๐˜ฐ๐˜ฐ๐˜ต๐˜ฉ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฅ๐˜ฆ๐˜ญ๐˜ช๐˜ท๐˜ฆ๐˜ณ๐˜บ ๐˜ฐ๐˜ฏ ๐˜ต๐˜ช๐˜ฎ๐˜ฆ - ๐˜ฉ๐˜ช๐˜จ๐˜ฉ๐˜ญ๐˜บ ๐˜ณ๐˜ฆ๐˜ค๐˜ฐ๐˜ฎ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ฅ!โ€ โ€œ๐˜’๐˜บ๐˜ณ๐˜บ๐˜ญ๐˜ฐ ๐˜ฅ๐˜ฆ๐˜ญ๐˜ช๐˜ท๐˜ฆ๐˜ณ๐˜ฆ๐˜ฅ ๐˜ค๐˜ญ๐˜ฆ๐˜ข๐˜ฏ, ๐˜ด๐˜ค๐˜ข๐˜ญ๐˜ข๐˜ฃ๐˜ญ๐˜ฆ ๐˜ค๐˜ฐ๐˜ฅ๐˜ฆ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฉ๐˜ข๐˜ฏ๐˜ฅ๐˜ญ๐˜ฆ๐˜ฅ ๐˜ง๐˜ณ๐˜ฐ๐˜ฏ๐˜ต-๐˜ฆ๐˜ฏ๐˜ฅ ๐˜ฅ๐˜ฆ๐˜ท๐˜ฆ๐˜ญ๐˜ฐ๐˜ฑ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜ฑ๐˜ณ๐˜ฆ๐˜ค๐˜ช๐˜ด๐˜ช๐˜ฐ๐˜ฏ. ๐˜Š๐˜ฐ๐˜ฎ๐˜ฎ๐˜ถ๐˜ฏ๐˜ช๐˜ค๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ ๐˜ธ๐˜ข๐˜ด ๐˜ด๐˜ฎ๐˜ฐ๐˜ฐ๐˜ต๐˜ฉ, ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฉ๐˜ฆ ๐˜ธ๐˜ข๐˜ด ๐˜ฑ๐˜ณ๐˜ฐ๐˜ข๐˜ค๐˜ต๐˜ช๐˜ท๐˜ฆ ๐˜ช๐˜ฏ ๐˜ด๐˜ฐ๐˜ญ๐˜ท๐˜ช๐˜ฏ๐˜จ ๐˜ต๐˜ฆ๐˜ค๐˜ฉ๐˜ฏ๐˜ช๐˜ค๐˜ข๐˜ญ ๐˜ค๐˜ฉ๐˜ข๐˜ญ๐˜ญ๐˜ฆ๐˜ฏ๐˜จ๐˜ฆ๐˜ด. ๐˜๐˜ช๐˜จ๐˜ฉ๐˜ญ๐˜บ ๐˜ณ๐˜ฆ๐˜ค๐˜ฐ๐˜ฎ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ฅ๐˜ฆ๐˜ฅ ๐˜ง๐˜ฐ๐˜ณ ๐˜ธ๐˜ฆ๐˜ฃ ๐˜ฅ๐˜ฆ๐˜ท๐˜ฆ๐˜ญ๐˜ฐ๐˜ฑ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต, ๐˜ˆ๐˜—๐˜ ๐˜ช๐˜ฏ๐˜ต๐˜ฆ๐˜จ๐˜ณ๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ, ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฑ๐˜ฆ๐˜ณ๐˜ง๐˜ฐ๐˜ณ๐˜ฎ๐˜ข๐˜ฏ๐˜ค๐˜ฆ-๐˜ง๐˜ฐ๐˜ค๐˜ถ๐˜ด๐˜ฆ๐˜ฅ ๐˜ฆ๐˜ฏ๐˜จ๐˜ช๐˜ฏ๐˜ฆ๐˜ฆ๐˜ณ๐˜ช๐˜ฏ๐˜จ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ซ๐˜ฆ๐˜ค๐˜ต๐˜ด.โ€ โ€œ๐˜๐˜ข๐˜ฑ๐˜ฑ๐˜บ ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜ด๐˜ฑ๐˜ฆ๐˜ฆ๐˜ฅ ๐˜ข๐˜ฏ๐˜ฅ ๐˜ฒ๐˜ถ๐˜ข๐˜ญ๐˜ช๐˜ต๐˜บ!โ€ Hereโ€™s what my clients value most: ๐ŸŽฏ Business-first mindset - I understand your priorities and align tech decisions with them โš™๏ธ Rapid MVP execution - from concept to launch in weeks, not months ๐Ÿงฉ Front End ownership - React, Next.js, API integrations, Tailwind, MUI and scalable architectures ๐Ÿงฉ Full Stack ownership - MERN, Express.js, Node.js, MongoDB ๐Ÿง  Strategic guidance - helping you define what truly matters for your first release I donโ€™t take on last-minute fixes or e-commerce stores - I focus on SaaS and MVP projects where clear product thinking makes the difference. If youโ€™re a founder looking for a reliable technical partner who speaks your language and delivers predictably - letโ€™s build something great together. ๐Ÿ› ๏ธ Tech Stack & Tools: โ€ข Languages & Libraries: React, React.js Node.js, JavaScript, ReactJS TypeScript, ReactJS NodeJS, Python, PHP, React Native, NextJS, MERN Stack โ€ข Styling: Material UI, Tailwind CSS, MUI React, custom SCSS / CSS โ€ข Build Tools: Webpack, Vite, NPM; โ€ข UI/UX: Figma, Frontend Design tools for pixel-perfect visuals; โ€ข Visualization: Leaflet, maps & data-driven charts. โ€ข Databases: MongoDB, PostgreSQL, MySQL, Firebase. โ€ข State Management: Redux, Zustand, RTK Query. โ€ข Cross-browser / cross-platform manual testing.

  • React
  • JavaScript
  • CSS
  • TypeScript
  • Node.js
  • Tailwind CSS
  • Next.js
  • MongoDB
  • Figma
  • Front-End Development
  • Software Development
  • Responsive Design
  • Full-Stack Development
  • Material UI
  • API Integration
Mykyta S.

Lisbon, Portugal

$45/hr
4.9
88 jobs

Hey! I'm Mykyta, a mobile app developer, React Native specialist, and full-stack engineer with 10+ years of experience and 32 successfully released apps. My core specialty is end-to-end mobile app development and building high-performance applications as a dedicated ios android developer for wellness, startups, and SaaS businesses. I've hit "App of the Day" on the App Store, helped a startup secure $750k, scaled products to 100K+ active users, and delivered 30%+ growth in user retention. That's a proven track record. ๐Ÿ„ React Native & Cross-Platform Expertise As a battle-tested mobile app developer, I build cross-platform applications that feel truly native. For comprehensive mobile app development, whether you're comparing React Native vs Flutter or need an expert perspective to make the right choice, I help you select the exact stack that fits your business goals, timeline, and budget. As a versatile ios android developer, I ship apps across both ecosystems using React Native, Expo, TypeScript, and JavaScript, managing the pipeline from architecture to final App Store deployment. Every professional mobile app developer knows that seamless integration requires deep platform knowledge and clean memory management โ€” that is exactly what I bring to the table. ๐Ÿ’ป Full Stack & End-to-End Product Ownership I own the entire product lifecycle, providing full-cycle mobile app development from web dashboards to final deployment. When you hire an all-in-one ios android developer, you get native-level client performance backed by a scalable infrastructure: Mobile: React Native, Expo, TypeScript, JavaScript, Redux, GraphQL, Reanimated, Lottie. Backend & Cloud: Node.js, Nest.js, AWS (S3, EC2), Firebase, Supabase, PostgreSQL, MongoDB. APIs & DevOps: Stripe, PayPal, Segment, Appsflyer, Sentry, CI/CD pipelines, Docker, GitHub Actions. As a React/Next.js developer, I complement every mobile product with robust web frontends. Working as your trusted mobile app developer, I ensure you get one reliable partner for the full stack. ๐Ÿค– AI Features & MVP Launch AI is no longer optional. I build intelligent mobile features โ€” custom LLM integrations, smart AI recommendation engines, and predictive UX. Having an expert in AI-native mobile app development on your team is a massive competitive advantage. As an innovative ios android developer, I blend AI with mobile performance seamlessly. I've built MVPs from zero to App Store deployment as a skilled ios android developer dozens of times. My optimized mobile app development process focuses on agile execution, rock-solid security, award-winning UI/UX, and long-term post-launch support from a reliable mobile app developer. I focus heavily on business metrics, helping founders achieve at least a 42% ROI on their mobile investment. ๐ŸŽฏ My Collaboration & Communication Philosophy A great app requires more than just clean code; it demands absolute transparency and alignment. I do not operate in a vacuum. When we work together, you get clear asynchronous updates, structured Slack or Microsoft Teams communication, and weekly video syncs with measurable milestones. I deeply understand business priorities, constraints, and the critical importance of keeping deadlines, making our partnership stress-free and highly predictable from day one. โš™๏ธ Scalable Architecture & Clean Code Approach Production-ready apps require careful planning. I focus on creating clean, modular, and maintainable codebases using cutting-edge design patterns. This means your application will be ready for rapid feature additions, team scaling, and heavy traffic loads without requiring a complete rewrite in six months. I prevent technical debt early by implementing strict TypeScript typing, optimized component re-rendering, and robust offline data caching mechanisms right from the start. โš™๏ธ Who I Work With I'm a great fit if you're looking for an experienced ios android developer to build: A React Native cross-platform app for iOS & Android with complex business logic. A SaaS mobile product with a Node.js, AWS, or Firebase infrastructure. An AI-powered mobile experience designed by a top-tier mobile app developer. A wellness or health tech application (deep niche domain experience). ๐Ÿ“ฑ Core Summary of Expertise โœ”๏ธ Mobile App Development: From wireframes to 100K+ active users and global scaling. โœ”๏ธ Mobile App Developer: Specialist in React Native, Expo, and performance optimization. โœ”๏ธ iOS Android Developer: Full-stack integration with Node.js, AWS, Firebase, and Supabase. โœ”๏ธ Web & AI Development: Next.js architecture, REST/GraphQL APIs, and LLM integration. โœ”๏ธ App Store Deployment: 32 successful apps shipped, approved, and actively maintained. Let's build something that matters. Drop me a message with your project details! Key Words: Flutter Developer | Mobile App Development | React Native Developer | Web App Development | Python Developer | Wordpress | iOS Developer | Android Developer | Mobile App Designer

  • React Native
  • Mobile App Development
  • React
  • iOS Development
  • Android App Development
  • Flutter
  • App Development
  • Android
  • Mobile App
  • Mobile App Design
  • Swift
  • JavaScript
  • Node.js
  • Web Design
  • iOS
  • Android App
  • WordPress
  • Mobile App Redesign
  • Mobile App Development Consultation
  • AI Mobile App Development
Artemii T.

Lisbon, Portugal

$40/hr
5.0
50 jobs

Full-Stack & Mobile Engineer (React, Next.js, Node.js, React Native, n8n, Supabase) โ–ช 10 years I help startups and growing companies build high-quality web apps, mobile apps, and backend systems using React, Next.js, Node.js, React Native, TypeScript, Supabase, and PostgreSQL. I turn messy codebases and unfinished features into clean, fast, stable applications โ€” web, mobile, and backend. I build MVPs in weeks, automate workflows with n8n, and ship production-ready releases at a predictable pace. My work has supported teams at Google, MIT, FedEx, and IPG Photonics (LightWeld used in SpaceX supply chain). Why me: ๐Ÿ… Top Rated Plus โ–ช 100% Job Success โ–ช $700k+ earned 10 years of hands-on full-stack, mobile, and backend development Shipped 70+ products across FinTech, HealthTech, SaaS, and marketplaces Built systems used inside Google, MIT, and FedEx Developed industrial software for IPG/LightWeld powering SpaceX-grade manufacturing Led engineering for a fintech mobile app with 250k+ monthly active users YC startup I worked with raised $1.6M after MVP What I deliver: โ€ข Full-stack development: React, Next.js, TypeScript, Node.js โ€ข Mobile app development: React Native for iOS & Android โ€ข Backend development: Supabase, PostgreSQL, Firebase, custom APIs โ€ข API integrations: Stripe, HubSpot, Slack, REST, GraphQL โ€ข Automation: n8n workflows (onboarding, CRM sync, internal tools) โ€ข MVP development in 4โ€“8 weeks โ€ข Codebase rescue, refactoring, performance improvements โ€ข Long-term weekly development & product support Toolbox: React โ–ช Next.js โ–ช React Native โ–ช Node.js โ–ช TypeScript โ–ช Supabase โ–ช PostgreSQL Firebase โ–ช Redis โ–ช Swift โ–ช Kotlin โ–ช Docker โ–ช AWS โ–ช Vercel โ–ช CI/CD โ–ช n8n Automations You get someone who can architect, build, integrate, and actually finish things โ€” not just write fragments of code. If you need a reliable full-stack or mobile engineer who delivers clean engineering and fast execution โ€” letโ€™s talk.

  • React Native
  • Mobile App Development
  • React
  • Web Application Development
  • Full-Stack Development
  • TypeScript
  • Node.js
  • iOS Development
  • Android App Development
  • API Integration
  • Claude
  • OpenAI API
  • Gemini
  • Objective-C
  • Swift
Qazi Muhammad Z.

Lisbon, Portugal

$20/hr
5.0
2 jobs

Hello, Iโ€™m Qazi Zia, a passionate and results-driven developer and Zoho expert with 7+ years of hands-on experience delivering high-performing solutions for startups, growing businesses, and enterprise clients. With a strong background in Zoho development, Web and mobile app development, and full-stack technologies, I specialize in transforming ideas into fully functional, scalable systems that automate processes, improve user experience, and drive business growth. Core Skills & Technologies Zoho Ecosystem - Zoho CRM (Customization, Workflow Automation, Blueprints, Reports) - Zoho Creator (Custom app development) - Zoho Books, Zoho Flow, Zoho Sign, Zoho Inventory - Deluge Scripting - Custom Functions & Widgets - Third-party integrations (Xero, QuickBooks, Mailchimp, Twilio, Shopify, etc.) - API integrations with other apps and platforms Web Development - WordPress (Custom themes, plugins, WooCommerce) - PHP (Laravel, CodeIgniter, Core PHP) - JavaScript (React, Node.js, Vue.js, jQuery) - HTML5, CSS3, Bootstrap, TailwindCSS eCommerce Solutions - Shopify Store Setup & Customization - Wix Website Development - Webflow Responsive Design & CMS Integration - Shopify App Integration & Custom Scripting Mobile App Development - Cross-platform apps using Flutter & React Native - Native Android Development - iOS App Development with Swift - Backend integration with Firebase, REST APIs, and GraphQL What I Can Do for You โœ”๏ธ Zoho Implementation & Automation: From scratch setups to optimization of existing systemsโ€”I'll streamline your business workflows using Zoho CRM, Books, Creator, and Flow to eliminate manual work, automate sales pipelines, and ensure accuracy in reporting. โœ”๏ธ Website Development & Customization: Whether itโ€™s a custom WordPress site, a clean Webflow design, or a Shopify store, I can create responsive, SEO-friendly, high-converting websites tailored to your business goals. โœ”๏ธ Mobile Apps That Deliver Value: Got an app idea? Iโ€™ll bring it to life with user-friendly mobile apps that are fast, secure, and scalable, designed with modern UI/UX principles. โœ”๏ธ Seamless Integration Between Systems: I specialize in connecting different systems and platforms using REST APIs, Zapier, Integromat, and Zoho Flowโ€”allowing your tools to work together effortlessly. โœ”๏ธ Ongoing Support & Maintenance: Need someone long-term to maintain and evolve your systems? I offer reliable support services, so you can focus on growing your business. ๐ŸŒ Timezone Flexibility I work comfortably across multiple time zones, offering real-time communication and support in: ๐Ÿ‡บ๐Ÿ‡ธ USA โ€“ EST / PST ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom โ€“ GMT ๐Ÿ‡ฆ๐Ÿ‡บ Australia โ€“ AEST My goal isnโ€™t just to code, itโ€™s to solve problems, add value, and help businesses scale efficiently. ๐Ÿ“ฉ Letโ€™s Talk! Whether you need a one-time project or long-term collaboration, Iโ€™m here to help. Letโ€™s discuss how I can help bring your vision to life using the right mix of technology and strategy. ๐Ÿ“… Message me today and letโ€™s build something amazing together.

  • React Native
  • Mobile App Development
  • Zoho Analytics
  • Zoho Books
  • Zoho CRM
  • Zoho Creator
  • Zoho Desk
  • Zoho Projects
  • API Integration
  • API Testing
  • Laravel
  • Full-Stack Development
  • MERN Stack
  • MongoDB
  • PHP

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