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Netherlands
$12/hr
38%
Job Success
$400 earned
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With 7 years of extensive experience in the tech industry, I have a strong skill set in full-stack development, blockchain technology, and artificial intelligence. My expertise includes various programming languages and frameworks such as React, Node.js, JavaScript, Python, Django, and Vue.js. I have also explored blockchain, web3, solidity, rust, and bot development, making me an experienced developer capable of handling diverse and complex projects.
Skills and Expertise:
- Frontend Development: React.js, Vue.js, JavaScript, HTML5, CSS3
- Backend Development: Node.js, Python, Django
- Blockchain & Web3: Solidity, Ethereum, Smart Contracts, DApps
- Bot Development: Custom chatbots, integration with various platforms
- AI & Machine Learning: TensorFlow, PyTorch, OpenAI API, Natural Language Processing (NLP)
- Web Development: Full stack web applications, RESTful APIs, GraphQL
- DevOps & Cloud: AWS, Docker, Kubernetes, CI/CD pipelines
- Other Technologies: Rust, Git, SQL/NoSQL databases
Throughout my career, I have successfully delivered numerous projects, ranging from web applications and mobile apps to blockchain solutions and AI-driven systems. My hands-on approach and commitment to staying abreast of the latest technological advancements ensure that I provide innovative and efficient solutions tailored to meet my client's needs.
If you're looking for a reliable, experienced, and versatile developer to bring your project to life, let's connect! I would like to learn more about your needs and how I can help you achieve your goals.
Feel free to reach out, and let's start a conversation!
Roy O.
has worked
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$45/hr
$200+ earned
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I’m a Shopify Developer and Web Programmer with 6+ years of experience building high-performing eCommerce stores and custom Shopify solutions. I specialize in creating scalable, conversion-focused Shopify stores, themes, and apps
🚀 What I bring to the table:
✔ Certified Shopify Developer
✔ Expert in Public & Private Shopify App Development
✔ Specialist in Custom Shopify Themes & Advanced Features
✔ Available 7 days a week, including weekends
💼 Shopify Services
• Custom Shopify store design & full setup (Figma/PSD → Shopify Liquid)
• Shopify theme design, development & advanced customization
• Liquid coding, JSON templates & dynamic sections
• Shopify Plus implementation & optimization
• Public & private Shopify app development
• API integrations (GraphQL & REST)
• Backend/admin custom solutions
• Product, inventory & data management
• Performance optimization & conversion rate improvement
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🛠️ Technical Skills
Shopify & Frontend:
Shopify (Liquid), JavaScript, HTML5, CSS3, Theme Development
Design & UX:
Figma, PageFly, GemPages, Wireframing, Prototyping
eCommerce & Integrations:
Klaviyo, GA4, Stripe, PayPal, Razorpay
CRM & ERP:
Custom integrations (Salesforce, HubSpot)
Web Development:
React, Node.js, TypeScript, REST & GraphQL APIs
Cloud & DevOps:
AWS, Google Cloud, CDN, Git, Docker, CI/CD
SEO & Analytics:
Technical SEO, Google Analytics, SEMrush
Databases & Security:
MySQL, MongoDB, SQL/NoSQL, Payment Gateway Integration, PCI Compliance, SSL
$95/hr
$0 earned
Available now
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I develop innovative apps for Apple platforms, specializing in iOS, iPadOS, watchOS, tvOS, and CarPlay. With over 10 years of experience, I create high-quality applications that millions trust and enjoy. My expertise includes Swift, SwiftUI, and Core Data, allowing me to build seamless user experiences and efficient backends using Python and FastAPI. I focus on clean architecture and robust testing using modern methodologies to ensure reliable and maintainable code. If you need a developer who can take your app ideas from concept to deployment while delivering exceptional performance and user engagement, let’s connect. I look forward to collaborating and making your vision a reality.
$45/hr
$0 earned
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I help startups and small teams ship production-ready web apps with AI built in, without the over-engineering.
I focus on Next.js, React and TypeScript, paired with practical LLM integrations (OpenAI, Anthropic, Vercel AI SDK). I build the kind of products that actually get used: SaaS MVPs, customer-facing dashboards, AI chat and document Q&A, and the unglamorous internal tools teams rely on every day.
What I deliver:
- SaaS MVPs from idea or Figma to deployed product (Next.js + Vercel + Supabase/Postgres)
- AI features that ship: RAG chatbots, document Q&A, content generation, workflow automation
- Frontend rebuilds and performance fixes (Core Web Vitals, accessibility, type safety)
- Stripe, auth, dashboards: the parts most freelancers rush through, done right
Why work with me:
- Coding seriously since 2022, currently finishing my Bachelor's. I treat freelance projects like an apprenticeship and overdeliver on scope.
- Native Dutch, fluent English. EU timezone with daily overlap into US East Coast hours.
- Pragmatic over fancy. I pick the boring, maintainable stack unless there's a real reason not to.
Tech: Next.js, React, TypeScript, Tailwind, Node, Postgres, Supabase, Prisma, OpenAI, Anthropic, Vercel, Stripe.
Send me a short brief on what you want built and I'll come back within 24 hours with a concrete plan, timeline and fixed price option if it fits.
Netherlands
$35/hr
$0 earned
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Senior Software Engineer with 7+ years of experience building scalable backend systems, AI-powered applications, microservices, and cloud-native solutions. Experienced in Python, Golang, Node.js, TypeScript, React, Docker, and Large Language Models (LLMs). Proven track record leading technical initiatives, designing distributed systems, and delivering high-impact products in fintech and SaaS environments.
Netherlands
$25/hr
$0 earned
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Senior Full Stack Software Developer with extensive experience building and delivering production-ready business applications, APIs, SaaS platforms, AI-powered systems, and cloud-based solutions. I specialize in .NET, React, Azure, Docker, Kubernetes, distributed systems, relational and NoSQL databases, graph and vector databases, RAG pipelines, agentic AI applications, software integration, and scalable web application development, with strong expertise across the complete software development lifecycle.
I have successfully led and delivered projects in the banking, finance, and online education sectors, focusing on enterprise-grade solutions. Focused on applied AI engineering, designing agentic multi-agent systems and Graph RAG retrieval pipelines with the Microsoft Agent Framework, LLMs, the Model Context Protocol (MCP), and Neo4j. My international experience across projects in the USA and the Netherlands has strengthened my adaptability, communication, and problem-solving skills. If you are looking for a developer who can deliver complex, scalable, and high-quality solutions, I would be glad to discuss how I can contribute to your project.
Netherlands
$70/hr
$100K+ earned
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It's great that you're checking my profile.
I haven't freelanced for some time, but I'm considering going back to freelancing again. I always enjoyed working for startups and scale ups - it's easier for me to operate in environment where I don't have to deal with multiple layers of management and where decisions have to be made by many peers.
I have experience as a team lead and product lead (I'm also building my small software business on a side), but mainly enjoy working as a fullstack developer. My main stack is Ruby on Rails, but I got my hands dirty with other languages and frameworks.
Besides regular feature development. There are other tasks I can help you with:
- Maintenance work
- Email delivery issues
- Optimizing SEO
- Rails updates
- Framework migrations (react to hotwire)
- Performance optimizations
- Testsuits speedups
I worked for startups, that want to move fast and ready to break things or those that go slow, but steady. I'm happy to adjust to your needs. If you need any referrals for jobs done outside upwork, I can connect you with those as well.
I contribute to OSS, for my own projects and for clients, please make sure to checkout my github profile to see my latest contributions.
Have a great day!
$90/hr
$500+ earned
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As a Data Scientist, Machine Learning Engineer, Cloud Developer, Data Engineer, Backend Developer, and Startup Co-founder, I have successfully leveraged AI and cloud technologies to drive innovation and solve real-world challenges across various industries.
Having co-founded and led an AI startup that was later acquired, I bring a unique blend of technical expertise and business insight. My focus lies in developing advanced machine learning models, data-driven solutions, and scalable cloud infrastructures on platforms like AWS and Azure.
$25/hr
$900+ earned
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🌍 Global Projects & Customers 🌍 More than 16 Tier-1 Global customer 🌍
💡 Specializing in FinTech, E-Commerce, AI-Powered Recruitment, Events management, and E-Learning Platforms 💡
👨💻 Leading Teams of Full-Stack Developers 👨💻
✅ Flutter and FlutterFlow
✅ React
✅ AI/NLP/Computer Vision
With over 18 years of experience, I lead teams of developers in building cutting-edge digital platforms and applications. My career spans working with leading vendors like Alcatel, NOKIA, and Huawei, bringing deep technical expertise and leadership to global projects. I also foster strategic partnerships with innovative technology companies such as Ultrahire.ai, Innovito.com, and Payspin.io, gaining access to key platforms like Intervue.io, NVISO.ai, NVIDIA Inception Program, and ZoomMeeting. My passion is in building scalable solutions, with a focus on FinTech, e-Commerce, and E-Learning, while managing skilled teams proficient in Flutter, FlutterFlow, Android, Kotlin, Dart, React, and Angular. I oversee projects from concept to deployment, ensuring high-quality, user-centric applications that meet business goals.
💼 Key Highlights:
✅ 18+ years of experience in technology and digital platform development
✅ Proven track record with global customers and projects
✅ Top-tier experience with Alcatel, NOKIA, and Huawei
✅ Leading teams of full-stack developers skilled in Flutter, FlutterFlow, Kotlin, Dart, React, and Angular
✅ Extensive expertise in FinTech, e-Commerce, E-Learning, and AI-powered mobile apps
🔧 Technical Expertise:
✅ Mobile App Development (Android, iOS, Flutter, FlutterFlow)
✅ Full-Stack Development (React, Angular, Node.js)
✅ Backend & API Development
✅ Third-Party API Integration (Payment systems, Firebase, Google Maps)
✅ Cloud & DevOps (Azure, Firebase, RESTful APIs)
✅ State Management and App Architecture
✅ Performance Tuning, Testing, and Debugging
🎯 Recent Features Developed:
✅ Keyword Matching
Technology: AI/NLP | Platform: Ultrahire.ai
Description: Matches keywords entered by recruiters with those used by candidates in video/text responses.
✅ CV Skills Matcher
Technology: AI/NLP | Platform: Ultrahire.ai
Description: Highlights key skills in candidate CVs based on reference keywords without requiring full CV screening.
✅ Candidate Online Exams Assessment
Technology: Auto-assessment with proctoring | Platform: Ultrahire.ai
Description: Allows recruiters to invite candidates to take proctored exams, assessing their technical and non-technical skills with anti-plagiarism techniques.
✅ Pair-Programming/Collaboration Assessment
Technology: Live online testing/interview | Platform: Ultrahire.ai
Description: Enables live interviews with shared coding environments and whiteboards for technical assessments and pair-programming evaluations.
✅ AI Psychometric Analysis Assessment
Technology: AI/NLP/Computer Vision | Platform: Ultrahire.ai
Description: Uses AI to assess candidate video answers, analyzing speech, facial expressions, and body language to score key human traits.
✅ Applicant AI Psychometric Self-Assessment
Technology: AI/NLP/Computer Vision | Platform: Ultrahire.ai
Description: Provides applicants with performance feedback on video interviews, using AI to analyze gestures, speech, and expressions, with personalized tips for improvement.
🎯 Additional Specializations:
✅ Mobile App Development for AI-Powered Mobile Applications
✅ Mobile App Development for On-Demand Mobile Apps
✅ Mobile App Development for Ride Instructor Booking Apps
✅ Recruitment Platforms
✅ Automotive Services Platforms
✅ Fixing Web & Mobile App Bugs
✅ Implementing New Platform Features
✅ Platform Transformation to Cloud and AI-Native Architectures
✅ Platform Management Operations & User Behavior Analysis
✅ Integration with 3rd-Party Apps, APIs, and Frameworks
✅ Building Cross-Platform Mobile Apps
✅ Strengthening Platform Security
As a hands-on leader, I ensure my teams deliver exceptional results in both functionality and security, continuously optimizing platform performance. Whether building complex platforms or integrating advanced AI solutions, I am dedicated to driving innovation and success in every project.
Netherlands
$17/hr
$200+ earned
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AI Engineer | Web Scraping & Automation | NLP & Chatbots
Hi, I’m Ferid, a software developer specializing in AI, automation, and high-performance backend systems. I’ve built intelligent chatbots, AI-powered medical triage systems, and large-scale web scrapers that process thousands of data points in real time. If you need scalable, efficient, and secure automation, I can help.
What I Can Do for You:
✔ AI-Powered Chatbots & NLP – Build intelligent, conversational AI for customer support, healthcare, and automation.
✔ Web Scraping & Data Extraction – Develop high-speed, undetectable scrapers for market research and financial data.
✔ Backend & API Development – Create scalable, secure APIs using FastAPI, Flask, and MongoDB.
✔ AI & Automation Integration – Automate repetitive tasks with machine learning and AI-driven workflows.
Why Work With Me?
✅ Proven Track Record – Built AI-powered medical systems, chatbots, and financial scrapers.
✅ Scalable & Secure Solutions – I design systems that handle thousands of requests per second without breaking.
✅ End-to-End Development – From architecture to deployment, I deliver reliable, production-ready code.
✅ Clear Communication & Transparency – You get regular updates, well-documented code, and strategic guidance.
Need a custom AI solution, automation system, or high-performance backend? Let’s build something amazing!