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Full Stack Engineer with expertise in Web and Mobile applications development including 𝐇𝐄𝐀𝐋𝐓𝐇𝐂𝐀𝐑𝐄 𝐈𝐓 | 𝟏𝟖+ 𝐘𝐑𝐒 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄 in Full Stack Development | 𝟏𝟎x 𝐕𝐄𝐋𝐎𝐂𝐈𝐓𝐘 using 𝐀𝐈 𝐃𝐫𝐢𝐯𝐞𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 (𝐕𝐢𝐛𝐞 𝐂𝐨𝐝𝐢𝐧𝐠 using Claud/Antigravity/Cursor/Replit)
I don’t just write code; I build healthcare software that clinicians actually want to use. With nearly 𝐓𝐰𝐨 𝐝𝐞𝐜𝐚𝐝𝐞𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, I specialize in bridging the gap between legacy medical infrastructure and the future of AI-driven development.
🚀 The "Vibe Coding" Advantage:𝟏𝟎𝐱 𝐅𝐚𝐬𝐭𝐞𝐫 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 𝐁𝐲 𝐥𝐞𝐯𝐞𝐫𝐚𝐠𝐢𝐧𝐠 𝐀𝐈-𝐨𝐫𝐜𝐡𝐞𝐬𝐭𝐫𝐚𝐭𝐞𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 (𝐕𝐢𝐛𝐞 𝐂𝐨𝐝𝐢𝐧𝐠), I deliver enterprise-grade features at unmatched velocity. I move your project from "blueprint" to "production-ready EHR" 10x faster than traditional methods, allowing you to innovate at the speed of the modern market.
🛠 Core Expertise & Specialized Services:
🏥 Starting from Web/Mobile App design to complete development integrated with backend and database along with deployment on Azure/AWS/Google cloud.
𝐀𝐈-𝐎𝐫𝐜𝐡𝐞𝐬𝐭𝐫𝐚𝐭𝐞𝐝 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐄𝐱𝐞𝐜𝐮𝐭𝐢𝐨𝐧: I leverage a proprietary suite of AI Agents to work in parallel across Design, Development, Database, Deployment & Testing. This allows me to personally deliver the output of an entire engineering team, saving you significant time and cost while maintaining a single, expert point of contact. You can save guaranteed 5x cost of development right away.
Why this works for My Clients:
Risk Reduction: You only have to manage one person (ME) instead of a whole team.
Cost Efficiency: You aren't paying for "project management overhead" or "meetings between developers."
Speed: You guaranteed to get "100x" benefit, which is the ultimate goal for any startup or enterprise applications.
🏥 Seamless EHR Integrations: Eliminating data silos by connecting Epic, Cerner, eCW, and athenaOne using HL7, FHIR, and SMART on FHIR.
🧬 AI-Native Workflows: Building the next generation of patient care tools, including AI-voice intake, automated clinical documentation, and predictive RPM alerts.
🔐 Compliance-First Design: Architecting HIPAA-compliant, ONC-certified environments with a "Zero-Leak" security mindset.
🌍 Telehealth & WebRTC: Designing low-latency, high-reliability video platforms for virtual clinics and remote patient monitoring.
Proven Impact for Enterprise Leaders: I have been trusted to deliver mission-critical infrastructure for some of the biggest names in healthcare:
🔵 Walmart: Architected Telehealth & RPM infrastructure.
🏢 Prime Healthcare: Managed hospital-scale integration and data pipelines.
🩺 CCM Pediatrics: Developed automated care management and patient engagement tools.
✨ Dr. Curves: Built a custom end-to-end clinical suite and provider portal.
You get the strategic wisdom of an 18-year of expert combined with the agility of AI-driven development. I ensure your systems talk to each other without losing data integrity, compromising security, or missing a deadline. Pay for ONE resource and get FIVE resources equivalent results.
🛠 Tech Stack
Design: Figma
Development: React, Flutter, Node.js, Angular, .Net Core , Java
Database : MSSQL , mySQL , PostGre, MongoDB , Oracle
AI tools: OpenAI, Google Gemini, Anthropic Claude
API’s: Stripe, Twilio, OpenAI, Google Cloud, AWS
Syed J.
has worked
.
$25/hr
100%
Job Success
$50K+ earned
Available now
Offers consultations
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I have expertise in Blockchain, Web and Mobile Applications, AI, SaaS, and custom solutions.
We deliver scalable and secure products with Full Stack Development (MERN, React, Node.js, Vue), Mobile Applications (React Native, Flutter), Web3, Smart Contracts, and AI Platforms.
We provide technical, industrial and result oriented development of products which scale and perform, taking example of one of our projects, a coffee shop based in Mexico which is generating revenue through a Custom Menu App which is developed by us and they are raising money through a Fundraising Platform built by our team, they have successfully raised 500k+ USD proving the scalability and business model.
WHAT WE OFFER
Blockchain and Web3:
We offer Blockchain Development and Smart Contracts ( ERC1155 / ERC721 / ERC20 ), Marketplaces, and NFT Platforms. We have our expertise in ICO and Token Launches, dApps, and Wallet Integration.
Web and Mobile Application Development:
SaaS platforms and customized apps, including Mobile Apps (iOS and Android) and Web Applications, are what we are experts in. Moreover, we make admin dashboards and different portals as well.
AI, ML & Generative AI:
AI Applications, Chatbots, AI search, Vector databases, Semantic search, ChatGPT integration and Open AI are some technologies we work on. Furthermore, we provide fine Prompt Engineering and LLM solutions.
UI/UX & Video Production:
We provide Prototyping, UI/UX, Product and Explainer videos to help you grow.
Support & Maintenance:
We offer ongoing technical support, performance monitoring, security updates, bug fixes, and system optimization to ensure long-term stability and scalability of your digital products.
Technology Stack
Frontend: React.js, Next.js, Redux, Vue.js, Vuex, Nuxt.js, Tailwind CSS, Bootstrap, GatsbyJS
Backend: Node.js, Express, NestJS, Sails, Python, Django, Flask, PHP, Laravel, Ruby on Rails
Mobile: React Native, Flutter, Swift, iOS, Android.
AI & ML: Generative AI, LLM, LangChain, Cohere, Vector Databases, Semantic Search
Cloud & DevOps: AWS (EC2, S3, Lambda, DynamoDB, MWS), Firebase, Google Filestore, Docker, Kubernetes.
Database: MySQL, PostgreSQL, MongoDB, Firebase.
Integrations: Stripe, Google Maps, Mapbox.
CMS & eCommerce: WordPress, Shopify, WooCommerce, Webflow.
Why Clients Choose Us:
Clients choose because they look for the founder's involvement & agile approach including daily and weekly project updates and clarity. We offer unlimited design revisions and free post launch support for 2 months. We provide custom, scalable and SEO friendly solutions. We work across different time zones with devoted project managers and QAs.
Serving diverse industries: EdTech, FinTech, Healthcare, Travel, Sports, Entertainment, Fashion, Food & Beverages, and more
Global collaboration: working across time zones with dedicated project management and QA
We don’t just make applications, we build solutions that impact, perform, and enhance business potential.
LAST UPDATED: 2/20/2026
#WebDevelopment #FullStackDevelopment #SoftwareDevelopment #CustomSoftware #ProductDevelopment #EnterpriseSoftware #SystemArchitecture #LegacyMigration #ApplicationDevelopment #MERN #JavaScriptStack #ModernWebStack #T3Stack #ServerlessStack #VercelStack #JavaScript #TypeScript #PHP #Python #GoLang #Rust #CPlusPlus #SQL #React #NextJS #VueJS #Angular #FrontendDevelopment #UIUXDesign #ResponsiveDesign #TailwindCSS #Redux #Zustand #FramerMotion #ShadcnUI #NodeJS #NestJS #Laravel #BackendDevelopment #APIDevelopment #GraphQL #Microservices #ExpressJS #Django #FastAPI #StripeIntegration #MongoDB #MySQL #Redis #Firebase #Supabase #NoSQL #AWS #GoogleCloud #CloudNative #DevOps #CI/CD #GitHubActions #Kubernetes #Vercel #AppDevelopment #MobileAppDevelopment #CrossPlatform #HybridApps #MobileSolutions #PWAs #Flutter #SwiftUI #Kotlin #Dart #Firebase #Supabase #APIDevelopment #BackendDevelopment #CI/CD #AWS #GoogleCloud #DevOps #Shorebird #Web3 #BlockchainDevelopment #BlockchainDevelopment #BlockchainDevelopment #SmartContracts #DAppDevelopment #DeFi #NFTDevelopment #CryptoWallet #DEX #DAO #Ethereum #Solidity #SolidityDeveloper #Hardhat #EthersJS #Anchor #Wasm #GenerativeAI #LLMIntegration #OpenAI #LangChain #AIAgents
Arsalan S.
has worked
.
Associated with
Pluton
$70K+
earned
$49/hr
100%
Job Success
Available now
Offers consultations
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✅ Expert-Vetted by Upwork (Top 1%)
✅ 8+ years of Mobile App Development
✅ 20000+ Upwork hours | 86+ successful jobs
✅ 100% Job Success Score
✅ 91+ mobile & web projects delivered
✅ Flutter, React Native, Kotlin, Swift, UI/UX expert
✅ Proven impact: apps with millions of downloads & high ROI
👋 I'm a Senior Mobile Developer with over 8 years of experience helping startups and enterprises bring their app ideas to life. From iOS and Android to full-scale cross-platform solutions using Flutter and React Native — I deliver high-performance mobile applications designed to scale, engage users, and grow revenue.
I've led teams of 15+ developers on enterprise-grade solutions and built MVPs for founders that went on to raise investment and scale to thousands of users. Whether you’re launching your first product or modernizing an existing one — I’ll help you make it real, robust, and ready for growth.
🧩 What I Can Do For You
As a dedicated Mobile App Developer and Full Stack Solution Architect, I offer full-cycle development:
—from idea & architecture, to scalable MVPs, intuitive UI/UX, app store deployment, and long-term support.
🛠 Tech Stack & Tools
Mobile: React Native, Flutter, Swift, Kotlin, Java, Dart
Frontend/Backend: TypeScript, Laravel, Firebase, Node.js, REST APIs
DevOps: AWS, CI/CD pipelines, GitHub Actions, Docker, Terraform
3rd Party: Apple HealthKit, Stripe, ChatGPT API, WebRTC, PayPal, MQTT
UI/UX: Figma, Adobe XD, custom UX audits & flows
SDKs: iOS SDK, Android SDK, TensorFlow, AWS SDK, Custom A/B SDKs
📱 Apps I’ve Delivered
Ride Instructor Booking App
Social Media & Dating Platforms
On-Demand Delivery Services
Investment & Finance Mobile Solutions
Learning Management Systems
Grocery & Inventory Management
VPN Wrappers, AI Assistants & Audio Bots
eSIM marketplaces and E-bike IoT apps
Custom Admin Panels and Secure Dashboards
🌍 Industries I Serve
Healthcare & Wellness
E-Commerce & Retail
EdTech & LMS
FinTech & Investor Platforms
Travel & Booking Apps
Sports, Fitness & Events
Blockchain, NFT, AI/ML-based Apps
Ecology, Waste & Recycling
Smartwatch + IoT platforms
Telecommunications (eSIM, VoIP, VPNs)
💡 Real Impact — Real Cases
Migrated legacy NativeScript app to React Native with full redesign and story-based features (Felloz, Croatia).
Created an MVP for a tarot reading platform with AI-driven magic ball chat, camera vision, and animated UX (Tarotoo, Ukraine).
Developed a smartwatch-integrated app for a UK-based security firm using Apple Watch for distress signaling.
Delivered GrowthBook SDK, CI/CD-integrated, with full UnitTest coverage and release to SPM/CocoaPods (Open-source, USA).
Reworked CarPlay integration for a mobility platform: custom routing, filtering, and Apple Maps integration (UAE).
📊 Highlights
✔️ Built full-stack mobile platforms with React Native, Swift, Kotlin, Flutter + Nest.JS, Firebase, Node.JS
✔️ Integrated ChatGPT API & DALL·E into production apps
✔️ Custom SDK development: Swift, Kotlin, TensorFlow, AWS
✔️ Delivered apps with integrated CI/CD pipelines and Unit Tests
✔️ Designed UX/UI flows that won Dribbble Awards
✔️ Supported MVPs that secured funding and scaled globally
✔️ Created Web + Mobile ecosystems for clients in over 15 countries
✔️ Delivered multilingual, accessible, and ADA-compliant applications
✔️ 5.0★ satisfaction across long-term clients on Upwork & Clutch
🤝 Why Work With Me
I’m not just a develope r— I’m your technical partner, working closely with you to bring clarity to the process, speed to delivery, and value to your users. I offer transparent communication, future-proof architecture, and measurable results.
📌 Let’s build something scalable and impactful together. Message me now to discuss your next big app.
🔗 Portfolio and project links available upon request.
Let’s build something exceptional.
Volodymyr N.
has worked
.
Associated with
Kevych Solutions
$30/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
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🔸 Mobile App Developer & CTO trusted by businesses to deliver products that survive production 🔸
10+ years of hands-on execution building scalable, high-performance mobile applications used by real users, not demos.
I step in when quality, architecture, and long-term growth are needed.
🔸 100+ digital products launched 🔸 100% Job Success on Upwork 🔸
I am a CTO and hands-on mobile app developer leading ORIL, a senior engineering team focused on delivering high-performance, secure, and scalable mobile solutions. If you are looking for a reliable mobile developer or an experienced react native developer, you are working with a team that understands production, performance, and long-term growth.
Our Core Strength: Mobile App Development
We specialize in Mobile App Development for iOS and Android, with deep expertise in react native to deliver efficient cross-platform solutions without compromising native performance or user experience. As a mobile app developer team, we build production-ready applications used by real users on real devices, not prototypes or proof-of-concepts.
Every mobile developer on our team has shipped apps to the App Store and Google Play. Every react native developer understands how to balance cross-platform efficiency with native quality.
I also collaborate with teams as a Mobile App Developer and React Native Developer, ensuring that mobile designs are implemented efficiently and accurately. Working alongside mobile developer engineers this collaboration guarantees that every mobile product performs reliably on iOS and Android, meets user expectations, and is production-ready.
What we deliver:
🔸 React Native App Development for iOS & Android
🔸 Native iOS Development and Kotlin-based Android apps
🔸 Cross-platform and native solutions led by senior engineers
🔸 Backend for mobile apps: Node.js, Java, secure and scalable APIs
🔸 AI-powered features and chatbots for mobile products
Our Team & Approach
Our team delivers end-to-end mobile solutions combining native iOS development, Kotlin-based Android apps, and cross-platform architectures. Every project is guided by a strong full stack developer mindset, ensuring the mobile application, backend services, and integrations operate as a single, reliable system.
The team includes senior android developer specialists who optimize native features, iOS engineers who ensure App Store quality, and experienced react native developer experts who deliver cross-platform efficiency. When project scope requires broader technical coverage, we bring in flutter developer specialists for alternative cross-platform needs, web developer experts for admin dashboards and landing pages, or python developer professionals for backend systems, data processing, and AI integrations.
Why Choose a Mobile App Developer with Production Experience
As a mobile app developer with over a decade of experience, I've seen what separates successful launches from failed ones. The difference isn't just technical skill, it's understanding production constraints, user behavior, battery optimization, App Store guidelines, and long-term maintenance.
Whether you need a mobile developer to rescue a struggling project, a react native developer to build from scratch, an android developer to optimize performance, a full stack developer to connect mobile with backend systems, or a web developer to build companion dashboards—I bring both strategic oversight and hands-on execution to ensure your product thrives in the real world.
Industries we work with: FinTech, Finance & Banking, Healthcare, HealthTech, Real Estate, Property Management, Marketplaces, Logistics, Transportation, Automotive, Retail, Media, Education, Fitness, Travel, Hospitality, Construction, and more.
If you need a mobile app developer, a trusted mobile developer, or a full team led by an experienced react native developer to build fast, scalable, and production-ready mobile applications, let’s connect and discuss how to turn your idea into a successful product.
🔸 Let's Build Your Mobile Product! 🔸
Zorian F.
has worked
.
Associated with
ORIL
$1M+
earned
$25/hr
100%
Job Success
$80K+ earned
Available now
Offers consultations
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I am Senior .NET Developer with 10+ years of experience building scalable SaaS platforms, enterprise applications, REST APIs, cloud-native systems, and AI-powered business solutions using C#, ASP.NET Core, SQL Server, and Microsoft Azure.
I help startups and enterprises build secure, high-performance applications with clean architecture, modern cloud infrastructure, and scalable backend systems.
## Core Skills
✔ C# / .NET 8 / ASP.NET Core
✔ REST API Development & Microservices
✔ Microsoft Azure (App Services, Functions, Service Bus, Storage)
✔ SQL Server Optimization & Database Design
✔ Entity Framework Core & Dapper
✔ Angular, React, JavaScript & TypeScript
✔ JWT Authentication, OAuth2 & OpenID Connect
✔ Docker, CI/CD Pipelines & GitHub Actions
✔ Clean Architecture & SOLID Principles
## AI & Automation Expertise
✔ OpenAI / ChatGPT API Integration
✔ AI Chatbots & AI-powered Applications
✔ Semantic Kernel & AI Automation
✔ RAG Pipelines & Vector Search
✔ Prompt Engineering & Structured Outputs
✔ AI-assisted Development using Claude, Copilot & ChatGPT
## What I Can Help You With
• Build scalable SaaS applications
• Develop secure REST APIs & microservices
• Migrate legacy .NET Framework apps to .NET 8
• Optimize APIs, SQL queries, and backend performance
• Deploy and scale applications on Azure
• Integrate AI/LLMs into existing systems
• Improve architecture, maintainability, and scalability
## Why Clients Work With Me
✔ 10+ years of professional software development experience
✔ Strong communication and reliable delivery
✔ Clean, maintainable, production-ready code
✔ Experience with startup and enterprise environments
✔ Long-term collaboration mindset
If you need a reliable .NET Developer, Azure Expert, or AI Integration Specialist, feel free to invite me to discuss your project.
Rajat K.
has worked
.
Associated with
Business Box
$100K+
earned
$35/hr
100%
Job Success
$500K+ earned
Available now
Offers consultations
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🔥 Engineer that saves your time, ships fast, and pays off 🔥
🏆 10+ years of experience
🔥 60+ successfully delivered projects
💸 products generating $8,5M+ in revenue
⭐ Web app with 20,000+ active users
I'm a Full Stack React Developer with 10+ years of production experience, delivering 60+ projects across SaaS, marketplaces, logistics, e-commerce, and Ops, with systems supporting 20K+ active users, 99.9% uptime, and millions of monthly requests. As a Senior React Developer and Frontend React, I shipped 50+ commercial products as a Full Stack Developer React Node, helping clients reach $8,2M+ revenue and reduce time-to-market by 30–40%.
I work daily as a Full Stack React Developer and Frontend React Next.js developer, combining UI performance and backend architecture as a Full Stack Developer React Node and Frontend React developer, improving LCP/TTI by 2–3x, increasing conversion rates by 25–35%, and scaling apps to 100K+ MAU. My background as a Frontend React developer and Full Stack Developer React Node enables full ownership from UX design to scaling and post-launch optimisation.
As a Full Stack React Developer, I’ve built SaaS platforms using Supabase and Supabase Postgres, implementing auth, RLS, and real-time systems handling 100K–300K events/day. I’ve used Supabase in 9+ production apps with Postgres, react next.js, react js, cutting backend costs by 40%, infra overhead by 35%, and delivery time by 30%.
I'm a Full Stack Developer React Node with deep experience as a full stack developer Node.js developer , building APIs, real-time services, and dashboards processing 5M+ requests/month. As a Full Stack Developer React Node, I delivered CRM, logistics, and warehouse dashboards, plus B2C marketplaces with Stripe payments, automating 50–70% of manual workflows.
On the frontend, I’ve worked the last 8+ years as Frontend React js and front end developer react. As frontend developer react, frontend react developer I focus on performance and conversion, reducing load times by 60%, bounce rates by 25%, and increasing engagement by 30–45%. I collaborate as a ux designer to turn UI improvements into measurable revenue growth.
I am also a react native developer, shipping 5+ cross-platform apps for iOS and Android, supporting 50K+ active users, 99.8% uptime, and peak loads during live events. These apps powered logistics and energy-tech startups reaching £7M annual revenue. I’ve also delivered projects using Astro, Svelte, Python.
As a web developer, full stack developer, and full stack react developer, I’ve built MERN stack systems as full stack developer react node, react redux, java react, and scalable APIs, deployed across multiple regions. I collaborated with distributed teams, including react developers Filipinos, reducing release cycles by 25% and production bugs by 30%.
Payments and monetization are core strengths: I implemented stripe billing, subscriptions, and marketplaces generating $4,7M+ revenue as a frontend react developer, reducing checkout drop-off by 20–30% and increasing AOV by 15–25%. I build SEO-friendly SSR apps with react next.js and next.js firebase, achieving 90+ Lighthouse scores and 2–3x organic traffic growth using modern javascript optimizations as a Full Stack Developer React Node.
Recent work includes large-scale dashboards, marketplaces, and PWAs built as a Full Stack React Developer, Frontend React, and Full Stack Developer React Node, using Claude Code for fast launches and custom React systems for core logic, saving teams 300–500 hours/month. My focus is always on clean architecture, measurable impact, and long-term maintainability.
If you’re looking for a Full Stack React Developer, react js developer, react web developer, or node developer who delivers measurable results, I provide predictable delivery, business-focused decisions, and long-term ownership.
🛠 Additional Technical expertise
- Launched 4+ apps as a mobile app developer / front end developer html, reaching 50K+ installs and 4.9 avg rating.
- Deep experience with Supabase RLS policy and Supabase Auth across 7+ systems and 20+ roles.
- Experience as a Python developer and senior full stack developer react node with Supabase on data-heavy platforms.
- 30+ projects as full stack developer react node.
- Full Stack Development work and 1200+ hours as full stack developer react node
- LLM & AI integration, OpenAI, Gemini, Chat GPT, building AI-powered applications that reduced manual work by 30–50% as a frontend react next.js developer and node full stack developer
- 8+ years as react js next js and 5+ years as react nextjs developer
- 6+ years as a frontend next.js react developer
- 5+ years as node.js developer, and backend nodejs engineer
- 10 projects as a headless CMS front end developer and as front end developer angular.
Let's begin the collaboration with Full stack React Developer by clicking "Invite" or "Hire" on the top right
Associated with
This is Software Team - Node.js & React & TypeScript
$60K+
earned
$20/hr
100%
Job Success
$10K+ earned
Available now
Offers consultations
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📌 Need a reliable Java developer who can take your system from idea to deployment—fast, clean, and scalable? I’ve been doing exactly that for 14+ years as a Java Spring Boot Developer.
As a senior Java Spring Boot Developer, I help businesses build high-performance, cloud-native applications using Java Spring Boot, microservices architecture, and modern engineering practices. Whether you need a Spring Boot developer, a backend architect, or a hands-on Java developer, I bring both technical depth and product thinking.
I specialize as a Java Spring Boot Developer in building modular, scalable, and cloud-ready systems. As a Spring Boot developer, I design clean architectures for Java microservices, real-time systems with Kafka or RabbitMQ, and high-load applications. As a Java developer, I ensure systems are maintainable, testable, and optimized for long-term growth.
Working as a Java Spring Boot Developer, I frequently collaborate with frontend teams using Spring Boot React and Spring Boot Angular stacks. As a Spring Boot developer, I align backend logic with frontend needs, ensuring smooth integration across JavaScript, HTML CSS JavaScript, and UI layers. My experience as a Java developer also includes working with JavaFX interfaces when needed.
Cloud is a key part of my work as a Java Spring Boot Developer. I’ve deployed scalable systems on AWS and GCP, acting as both AWS and GCP architect. As a Java developer, I work with AWS DevOps tools like Lambda, API Gateway, Cognito, S3, and EC2. As a Spring Boot developer, I integrate backend services with GCP tools such as Firestore, Pub/Sub, and Cloud Functions, ensuring performance and reliability.
Databases are another strong area. As a Java developer, I’ve worked with PostgreSQL, MySQL, SQL Server, Oracle, MongoDB, and Cassandra. As a Spring Boot developer, I design efficient schemas, optimize queries, and handle large-scale data systems. Every Java Spring Boot Developer project I take on includes a strong focus on database performance and scalability.
Clean code and testing are essential in my workflow as a Java Spring Boot Developer. I rely on JUnit testing, TDD, and CI/CD pipelines. As a Java developer, I use Maven, Docker, GitHub Actions, and Jenkins to ensure stable delivery. As a Spring Boot developer, I focus on building systems that are reliable, testable, and easy to extend.
📊 Snapshot of My Expertise
💻 Delivered 20+ systems as a Java Spring Boot Developer, including fintech platforms and SaaS applications
☁️ Worked as a Java Spring Boot Developer and cloud architect using AWS and GCP infrastructure
📊 Optimized large-scale databases as a Java developer, improving performance by up to 60%
🔁 Built intelligent systems integrating Spring AI as a Spring Boot developer
🔐 Secured APIs using OAuth2 and Hibernate as a Java Spring Boot Developer
🧪 Maintained high test coverage using JUnit and CI pipelines as a Java developer
🧰 Collaborated across teams delivering full features as a Spring Boot developer
If you’re looking for a Java Spring Boot Developer, a reliable Java developer, or an experienced Spring Boot developer who can handle complex systems and deliver scalable solutions I’m ready to help.
📩 Send me a message I usually reply within a few hours.
SP S.
has worked
.
Associated with
Hello World Tech Consulting LLP
$3K+
earned
$59/hr
93%
Job Success
$90K+ earned
Available now
Offers consultations
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Full-stack web development company with 20 engineers and 25 years building production platforms.
We deliver React, Node.js, Next.js, and TypeScript web applications. API integration, RESTful API development, AI development, chatbot development, SaaS platforms, and complex business logic. PostgreSQL, MongoDB, Docker. European timezone, production-ready in 2 weeks.
We build with Claude Code, RAG pipelines, and AI agent architectures. LLM integration, MCP servers, and AI-powered automation.
Two ways I work with clients:
- Dedicated developers for your team. Senior JavaScript and React developers vetted on real production projects.
- Custom web application builds. Fixed scope with paid discovery so there are no surprises.
93% Job Success. Clients in US, UK, Germany, Austria. Average engagement: 12+ months. I personally scope every project and vet every engineer.
Ihor C.
has worked
.
$15/hr
100%
Job Success
$80K+ earned
Offers consultations
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I’m a 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 & 𝐅𝐥𝐮𝐭𝐭𝐞𝐫𝐅𝐥𝐨𝐰 developer with 8+ years of experience building beautiful, high-performance cross-platform mobile apps for iOS, Android & Web using Dart, Firebase, Node.js and Supabase.
✔︎ 𝟖+ 𝐘𝐞𝐚𝐫𝐬 of Experience in 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐖𝐞𝐛 Development
✔︎ 𝟓𝐌+ $ 𝐟𝐮𝐧𝐝𝐢𝐧𝐠 raised by clients
✔︎ 𝟑𝐌+ 𝐚𝐩𝐩 𝐝𝐨𝐰𝐧𝐥𝐨𝐚𝐝𝐬 | 𝟒𝟓+ 𝐩𝐮𝐛𝐥𝐢𝐬𝐡𝐞𝐝 𝐚𝐩𝐩𝐬
✔︎ 𝐁𝐨𝐨𝐬𝐭𝐞𝐝 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐛𝐲 𝟒𝟎% using AI Tools like Claude, GitHub Copilot & Cursor
⚡ 𝟭 𝗛𝗼𝘂𝗿 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝗧𝗶𝗺𝗲 | Available 𝟭𝟴 𝗛𝗼𝘂𝗿𝘀/𝗗𝗮𝘆
𝐑𝐚𝐧𝐤𝐞𝐝 𝐀𝐦𝐨𝐧𝐠 🌟 𝐓𝐨𝐩 𝟏% 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤
I help startups and businesses build 𝐌𝐕𝐏𝐬, prototypes, and full-scale apps 𝟐𝐗 𝐅𝐚𝐬𝐭𝐞𝐫 saving 50%+ in time and cost while delivering 𝐈𝐧𝐯𝐞𝐬𝐭𝐨𝐫-𝐑𝐞𝐚𝐝𝐲, 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬.
From UI/UX to full backend integration, I handle everything — including authentication, real-time databases, cloud functions, and analytics.
✅ Why Choose Me
⚡ 1. Fast MVPs with Flutter & FlutterFlow
I build cross-platform apps using Flutter and FlutterFlow, helping you launch high-quality MVPs quickly — with responsive UI and smooth performance on both iOS and Android.
🏆 2. Top Rated🥇on Upwork with 100% Job Success – Trusted by Clients
I’ve earned the Top Rated badge on Upwork by consistently delivering high-quality work, 5-star reviews, and strong client satisfaction. You’re working with someone who’s proven, reliable, and easy to collaborate with.
🛠️ 3. Scalable Backends with Node.js, Firebase & Supabase
From authentication to real-time databases and cloud functions, I integrate powerful backend solutions using Firebase and Supabase — designed for growth and reliability.
🧠 4. Built-In Analytics with Mixpanel & Google Analytics tools
I implement Mixpanel and Google Analytics tools to give you real-time data on user actions, funnels, and retention — so you can make smarter product decisions backed by analytics.
🧑💻 5. Clean, Maintainable Code
I write modular, well-documented Dart code that’s easy to maintain and scale — whether you're handing it off to another dev or building on it long-term.
6. Complete App Lifecycle Support
From wireframes to App Store & Play Store deployment, I handle the full app development process — ensuring a seamless, end-to-end experience with zero guesswork.
🏆 Skills 🏆
👉 Flutter (Android, IOS, Web)
👉 FlutterFlow (Low-code MVPs & prototypes)
👉 Supabase & Firebase (Firestore, Auth, Storage)
👉 Mixpanel Integration (Event tracking, Funnels, User analytics)
👉 Android App Development (Kotlin, Java)
👉 PHP Laravel & Node.js
👉 Push Notifications (FCM)
👉 REST API Integration
👉 Custom UI & Animations
👉 iOS & Android Deployment
Expertise:
🏢 Real Estate
🛒 E-commerce
🚗 Automotive industry
💪 Health and wellness
🖥 Technology and software development
📈 Digital marketing and advertising
🏥 Health care
🍔 Food and beverage
🎓 Education technology
💰 Personal finance and wealth management
🏠 Home improvement and remodeling
🔮 Virtual reality (VR) and augmented reality (AR)
🌱 Renewable energy and clean technology
🐾 Pet care and services Apps
🔧 Technical Skills Keywords
Flutter Developer, Dart Programming, FlutterFlow Expert, Supabase Integration, Firebase Developer,
Mixpanel Analytics, iOS App Development, Android App Development, Cross-Platform App Developmen,t Mobile App UI/UX, No-code/Low-code, FlutterFlow App, Performance Optimization,
Push Notifications, (Firebase/Mixpanel), Real-time Database Integration. Authentication & Firestore, Rules App Analytics, Event Tracking, MVP development. MVP Launch, VIBE Coding,
Anil J.
has worked
.
$30/hr
100%
Job Success
$9K+ earned
Available now
Start of list.
End of list.
Stop losing users to clunky, slow-loading interfaces, research shows 53% of users will abandon a web app if it takes more than three seconds to load! 🚀
I am a Senior full stack developer and Senior Engineer with 8 years of experience building elite, high-performing web apps.
As a full stack developer and specifically a full stack developer react node, I architect scalable SaaS platforms.
When you need a full stack developer react node, you get a versatile web developer, skilled front-end developer, and robust back-end developer. Here is how my full stack developer react node expertise ensures your website and web app succeed:
Reduced page loads by 42% for a flagship saas product as lead full stack developer, bridging the gap between a ux designer and a front end developer react.
Scaled a react and node.js web app for 100k+ users, proving the value of a dedicated full stack developer react node utilizing the mern stack.
Boosted retention by 30% by overhauling website ia, showing exactly why your MVP needs a reliable full stack developer react node.
💻 Architecture & Front-End Excellence
💡 As a dedicated full stack developer, I leverage mern architecture, next.js, and react to build robust solutions. A top-tier full stack developer react node combines the vision of a ux designer and a designer to ensure exceptional ia. I am a react developer and front-end developer integrating a high-converting exaplainer video or demo video to boost saas sales and saas marketing. A successful web developer and full stack developer masters the MERN stack, javascript, vue.js, and angular for comprehensive saas platforms. Every web app I build as a full stack developer react node relies on node.js, nestJS, react, and next.js to deliver an ai-powered experience. A full stack developer react node knows react is the key to scalable ui. As a full stack developer I guarantee every saas mvp is flawlessly executed by a true full stack developer react node,.
📱 Mobile App Development & Full Stack Power
⚙️ As a mobile app developer and full stack developer react node, I create every native app with precision. Using react native and react native mobile, your mobile app is seamless. A full stack developer knows a react native mobile deployment requires a strong back-end developer managing firebase and supabase. As a react developer and full stack developer react node, every native app and web app I build integrates flawlessly with node.jss and next.js. Hire a full stack developer react node and get a react developer who masters supabase to firebase, ensuring your react ecosystem thrives. Every saas business needs a full stack developer react node who is both ui-focused and backend-focused.
📈 E-commerce, Backend & Niches
🔥 Building a custom shopify storefront, shopify website, or shopify platform? A full stack developer react node brings essential php and laravel skills. As a back-end developer and full stack developer, I leverage laravel, python, and php, ensuring advanced laravel routing for complex b2b software. A full stack developer react node excels in e-commerce, integrating woocommerce and shopify. My full stack developer react node experience covers everything from a landing page to a healthcare app, clinic saas, and fitness saas using rest api and postgresql. As an ai workflow engineer and front-end layout engineer, I engineered a security automation platform, cold email software, and live commerce saas.
🚀 Next-Level Web Solutions
🌐 As a full stack developer, I deliver a cost-controlled MVP using webflow customization / react integration and aws. My skills build a robust business management app and scalable MVP management system. Whether creating a browser extension, deterministic fsm intake system, or live basketball betting dashboard, I am the full stack developer react node for you. Deploying a multi-dealer inventory marketplace and web-based casino game utilizing redis, websocket, and java spring proved my wordpress developer capabilities. My webflow customization / integration drives social integration and onboarding flow enhancement. I build an ai-powered / ai-savvy mvp with css grid, ai, and next.js. Need a full stack developer react node to scale? My expertise as a full stack developer react node and full stack developer is unmatched. A web developer mastering ia, mern, and webflow ensures your demo video, woocommerce exaplainer video, and webflow perfectly boost mvp sales and SaaS marketing. When you hire a full stack developer, you need an engineer who breathes react and SaaS. My journey as a full stack developer react node guarantees that whether we are scaling a SaaS platform or a bespoke web app, your react architecture remains pristine. A dedicated full stack developer react node is the ultimate asset for your SaaS. As a Full Stack Developer React Node, I empower your business to thrive. Hire a full stack developer react node to scale your SaaS, MERN web app, and react native mobile app today!
Dmytro K.
has worked
.