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  1. Expert API Developer Needed for Amadeus Integration ( about 16 hours ) (7 Applicants)
    [5039][ 1136771 ] 6 days (2025-07-29 00:58 AM)
    ~021949952710190387974
    web_mobile_software_dev • web_development • FIXED •
    1000.0 - -
    {"invitesSent" => 1, "totalInvitedToInterview" => 3, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 0}
    Skills API • API Integration • JavaScript • RESTful API •
    About Client ⭐️ 5.0 • 2 reviews • GBR • 8 jobs • $430 Arzan Travel

    **"Please send your proposal only if you have proven experience with similar projects."**

    We are seeking an experienced API developer with a strong background in integrating with Amadeus services for flights (Only). The ideal candidate will have a proven track record of successful API integrations and familiarity with travel industry standards. You will work closely with our team to ensure seamless functionality and optimization of our existing systems. If you're a problem-solver with strong communication skills and a passion for innovative solutions, we would love to hear from you.

  2. Fullstack Developer need build SaaS Web Application ( about 16 hours ) (36 Applicants)
    [425][ 1143705 ] 6 days (2025-07-29 23:26 PM)
    ~021950269437457718134
    web_mobile_software_dev • web_development • FIXED •
    5000.0 - -
    {"invitesSent" => 11, "totalInvitedToInterview" => 9, "totalHired" => 0, "totalUnansweredInvites" => 2, "totalOffered" => 0, "totalRecommended" => 1}
    Skills Next.js • React • Supabase • API •
    About Client ⭐️ 0.0 • 0 reviews • Sweden • 0 jobs • Elisa T

    We are seeking an experienced Fullstack Developer with expertise in Next.js, Supabase, and React to help us design, develop, and deploy a modern SaaS (Software as a Service) web application. Our ideal candidate is highly skilled in both frontend and backend technologies, understands best practices for security and scalability, and can translate business needs into robust solutions.

    Responsibilities:

    Develop a scalable, secure SaaS web application from scratch
    Design and implement responsive UIs with React and Next.js
    Build back-end logic, authentication, and real-time features using Supabase
    Integrate third-party APIs and payment systems (e.g., Stripe)
    Ensure high performance, accessibility, and SEO
    Collaborate with our team to refine requirements and deliver on milestones
    Set up deployment, monitoring, and CI/CD pipelines (preferably on Vercel or Netlify)
    Requirements:

    5+ years of fullstack development experience
    Strong proficiency with Next.js, Supabase, and React
    Experience with PostgreSQL, server-side rendering, and REST/GraphQL APIs
    Proven track record building SaaS platforms or complex web applications
    Familiarity with cloud deployment (Vercel, Netlify, AWS)
    Excellent communication and project management skills
    Ability to work independently and meet deadlines
    Nice to Have:

    Experience with Tailwind CSS, Material-UI, or similar frameworks
    Payment integration (Stripe, PayPal)
    Knowledge of GDPR and web security best practices
    To Apply:
    Please share your relevant experience, portfolio examples, and a brief outline of how you would approach building our SaaS platform.

    We look forward to working with a talented developer who can help us turn our vision into reality!

  3. OCR Plugin Development for Aviation App Startup ( about 17 hours ) (9 Applicants)
    [2975][ 1153358 ] about 16 hours (2025-08-03 20:02 PM)
    ~021952052357461147272
    web_mobile_software_dev • web_development • FIXED •
    7000.0 - -
    {"invitesSent" => 0, "totalInvitedToInterview" => 0, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 0}
    Skills JavaScript • API • Android • Smartphone • Java •
    About Client ⭐️ 0.0 • 0 reviews • United States • 0 jobs • Mark B

    We are launching an innovative aviation app and need an OCR plugin to efficiently scan and digitize handwritten information. The ideal candidate will have experience with OCR technology, particularly for handwriting recognition. No OCR is needed to be built from scratch, just looking to use a plug in. You will collaborate closely with our team to ensure the plugin integrates seamlessly with our app. A budget of $5,000 - $10,000 is allocated for this project. I have app designs completed looking for one to digitize the app and write the code and integrate an OCR plug in. If you are passionate about aviation and have the necessary skills, we would love to hear from you!

  4. [3318][ 1153714 ] about 18 hours (2025-08-03 18:11 PM)
    ~021952024506823969379
    web_mobile_software_dev • web_development • FIXED •
    1000.0 - -
    {"invitesSent" => 1, "totalInvitedToInterview" => 2, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 4}
    Skills OpenAI API • Mapbox • Node.js • Image Processing •
    About Client ⭐️ 5.0 • 1 reviews • DEU • 1 jobs • $500 Roman L

    Project: Build an Automated Poster Generator for MementoMap (GPX → Map + AI → PNG/PDF)
    🔗 Prototype website with poster samples: https://mementomap.carrd.co

    🧭 About the Project
    I’m developing a digital product called MementoMap, which allows users to generate personalized adventure posters from their GPX files — such as hiking, cycling, or running routes.

    The goal is to build the core backend engine that can take a user-uploaded GPX file and automatically produce a beautiful, customized A2 poster. You’ll work from an existing Mapbox style and poster design template already prepared by a designer.


    🎯 Scope of Work
    The system should:
    1. Parse a GPX File
    • Extract key data: route, distance, time, elevation, bounding box
    2. Render the Map
    • Use a provided Mapbox Studio style
    • Automatically zoom, center, and fit the route
    • Apply style selection: line or dots
    3. Generate an AI Image
    • Derive a text prompt from GPX region (e.g., “sunrise in the Dolomites”)
    • Generate a landscape highlight using OpenAI or Stability API
    4. Assemble the Poster
    • Combine map, AI image, stats, and title using a provided layout
    • Output two files:
    • High-res PNG (A2, 300 DPI) for digital download
    • Optional PDF for print-quality output
    5. Upload & Deliver
    • Store output to Cloudflare R2 (or similar S3-compatible storage)
    • Return download links via webhook or API response

    🔧 Stack & Tools (Preferred)
    • Node.js (preferred), or Python
    • Mapbox Static Images API
    • OpenAI / Stability AI API
    • GPX Parser libraries (e.g. Turf.js)
    • Image composition tools (e.g. Canvas, ImageMagick, Puppeteer)
    • Cloudflare R2 or S3-compatible storage
    • REST API or webhook delivery

    ✅ Ideal Candidate
    • Experience with automation pipelines, mapping APIs, or creative generation tools
    • Can independently deliver a functional backend
    • Understands file storage and API integration (Make.com will consume the output)
    • Bonus if you’ve worked with digital/print graphics before

    💰 Budget & Timeline
    • Fixed price: Open to offers in the range of €800–€1,200
    • Start date: ASAP
    • Timeline: Expected delivery in 2–3 weeks

    📝 To Apply

    Please share:
    1. Relevant past work or demos (especially mapping or image assembly)
    2. Whether you can support both PNG and optional PDF output
    3. Your stack of choice
    4. Timeline and fixed-price estimate
    5. Any input on improving the backend flow or output options

    📎 Prototype poster samples: https://mementomap.carrd.co

  5. [2798][ 1108173 ] 12 days (2025-07-23 20:46 PM)
    ~021948077282993668513
    web_mobile_software_dev • web_development • FIXED •
    3500.0 - -
    {"invitesSent" => 0, "totalInvitedToInterview" => 6, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 0}
    Skills Artificial Intelligence • ElevenLabs •
    About Client ⭐️ 4.96 • 8 reviews • United States • 106 jobs • $10,680 Common Vow LLC

    We’re building a new platform for AI-powered interactive audio shows – think podcast meets AI conversation. We need a technical partner/freelancer who can own the MVP build and guide us on how to structure content for the platform.

    This role is not about creating the content, but rather doing a feasibility analysis, researching and proposing the best technical approach for delivering interactive audio experiences (a hybrid of pre-generated content and live AI responses), and developing a lightweight web or mobile MVP where users can play an episode, ask questions in real-time, and then return to the main narrative path. You’ll also experiment with existing AI platforms (e.g., OpenAI, ElevenLabs, Play.ht) for voice generation and LLM-based interactivity, while advising on how content should be structured (segmentation of shows, metadata, Q&A layers) to ensure smooth AI-driven interaction.

    Responsibilities:

    Prototype an interactive player that mixes pre-recorded AI voice narration with real-time Q&A. Experiment with voice AI and LLM APIs to deliver human-like narration and context-aware answers. Determine how to store and retrieve content (scripts, episodes, context) to support smooth interactivity. Document a technical roadmap for scaling beyond MVP.

    Skills Needed:

    Strong experience with AI APIs (OpenAI, Anthropic, ElevenLabs, Play.ht, etc.). Background in building MVPs for voice or conversational apps. Familiarity with LLM fine-tuning, embeddings, or retrieval-augmented generation (RAG). Knowledge of audio playback systems for web or mobile. Ability to rapidly prototype and iterate.

    How to Apply:

    Describe your approach to building a fast, functional MVP with existing tools. Briefly outline how you would structure a system for mixing pre-recorded audio and live AI responses.

  6. [4932][ 1123282 ] 9 days (2025-07-26 19:33 PM)
    ~021949145889579246149
    web_mobile_software_dev • web_development • FIXED •
    4000.0 - -
    {"invitesSent" => 2, "totalInvitedToInterview" => 2, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 3}
    Skills Next.js • Solidity • Smart Contract • Ethereum • React • Node.js • web3.js • Ethers.js •
    About Client ⭐️ 0.0 • 0 reviews • Italy • 1 jobs • Arnaldo D

    Carbosia, start-up che tokenizza crediti di CO₂ italiani, cerca 1 sviluppatore freelance per realizzare e mantenere:

    Sito vetrina (Next.js/React) con area riservata clienti (login, saldo certificati).

    Smart-contract (Solidity, Polygon o rete EVM equivalente) con funzioni mint, burn, proof-of-reserve.

    Dashboard mini-analytics (lettura on-chain + grafico saldo).

    Tempistiche

    31 ago 2025 → mock-up approvato

    15 set 2025 → contratto in testnet + landing online

    30 set 2025 → deploy mainnet + dashboard minimaAssistenza inclusa.

    Dobbiamo arrivare ad aver realizzato l'MVP del sito funzionante e presentabile per il 30 di settembre

    Competenze richieste

    ≥ 2 anni sviluppo smart-contract audited (link a GitHub / explorer).

    Front-end React / Next.js.

    Esperienza freelance con roadmap e milestone.

    Ottima comunicazione (IT/EN).

    Budget e pagamento a milestone (escrow Upwork)Si richiede un'offerta per arrivare al MVP regolarmente in produzione30 % mock-up ✔ │ 40 % testnet ✔ │ 30 % go-live ✔.SI richiede poi quotazione per la manutenzione e gestione dei contenuti del sito successiva alla messa in produzione.

    Selezione

    Invia portfolio pubblico + breve nota su progetti simili.

    Colloquio video breve (30 min) entro la prossima settimana via Upwork Call.

    🚩 Nota policy Upwork: tutta la comunicazione e i pagamenti resteranno sulla piattaforma fino alla firma del contratto. Non inserire contatti esterni.

  7. Web Traffic Simulation Tool Development ( about 19 hours ) (5 Applicants)
    [4954][ 1149499 ] 1 day (2025-08-02 20:28 PM)
    ~021951696676408811970
    web_mobile_software_dev • web_development • FIXED •
    1000.0 - -
    {"invitesSent" => 0, "totalInvitedToInterview" => 2, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 2}
    Skills JavaScript • Python • Java • HTML • C# •
    About Client ⭐️ 3.38 • 3 reviews • Latvia • 12 jobs • $1,003 GBP Agency

    We are looking for a developer with proven experience in building tools that generate synthetic but detectable web traffic for analytics platforms like Similarweb.

    The tool should be capable of:
    -Generating web traffic that is visible in third-party analytics platforms (e.g. Similarweb)
    -Simulating traffic from different geolocations, devices, and referral sources
    -Mimicking real user behavior (time on site, multiple page visits, interaction, etc.)
    -Allowing customization of volume, duration, and traffic sources
    -Using proxy/VPN rotation, headless browsers, or other automation techniques

    Please apply only if you have already worked on similar traffic emulation projects specifically targeting visibility in analytics platforms.

    This is NOT a generic bot or scraper project — we are looking for someone who knows how to influence third-party analytics metrics, not just internal analytics like Google Analytics or Matomo.

    When applying, please include:
    -A brief summary of similar projects you’ve worked on
    -What technologies or strategies you plan to use
    -Estimated delivery timeline

    💡 Category and Skills (keep as is or add):
    -Full Stack Development
    -JavaScript, Python
    -Proxy/VPN management
    -Web automation (e.g. Puppeteer, Selenium)
    -Bot/human behavior emulation

  8. [4919][ 1149457 ] 1 day (2025-08-02 20:39 PM)
    ~021951654074846772872
    web_mobile_software_dev • web_development • FIXED •
    2000.0 - -
    {"invitesSent" => 36, "totalInvitedToInterview" => 15, "totalHired" => 0, "totalUnansweredInvites" => 13, "totalOffered" => 0, "totalRecommended" => 0}
    Skills Web Development • WordPress • PHP • JavaScript • Web Design •
    About Client ⭐️ 0.0 • 0 reviews • Nigeria • 3 jobs • Roland Ominiabhs

    We are seeking a skilled web developer to create a dating website that includes payment integration and a unique gift-sharing feature for real-life interactions. The ideal candidate will have experience in building user-friendly platforms and integrating secure payment options. You will be responsible for the full cycle of development, from design to deployment. If you have a passion for connecting people and creating engaging online experiences, we want to hear from you!

  9. [4879][ 1149354 ] 1 day (2025-08-02 19:31 PM)
    ~021951682277107793544
    web_mobile_software_dev • web_development • FIXED •
    1000.0 - -
    {"invitesSent" => 0, "totalInvitedToInterview" => 2, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 0}
    Skills FlutterFlow • Flutter •
    About Client ⭐️ 4.87 • 50 reviews • Georgia • 299 jobs • $123,186 Doug Web

    Here's a revised Upwork job post that focuses on having the freelancer create everything using AI tools:

    Title: FlutterFlow Expert - Build Virtual Try-On App Using AI Tools ($1000)
    Budget: $500-1000 (Fixed Price)
    Timeline: 5-7 days
    Experience Level: Expert
    Project Overview:
    I need a FlutterFlow expert to build a complete Virtual Try-On System. You'll use AI tools (ChatGPT/Claude) to generate the code and implement it in FlutterFlow. This is a modern approach where you leverage AI for faster development while ensuring quality.
    Project Requirements:
    Core Features Needed:

    #User Registration/Login system
    Credit-based system (users purchase credits, 1 credit = 1 try-on)
    Image upload functionality (user photo + garment photo)
    Integration with FASHN.AI API for virtual try-on generation
    Stripe payment integration for credit top-ups
    Modern UI with dark/light theme support
    Web + Mobile (iOS/Android) from single codebase

    #Technical Stack:
    FlutterFlow for development
    Firebase (Authentication, Firestore, Storage)
    FASHN.AI API (I'll provide access)
    Stripe for payments

    #Your Approach:
    Use AI tools (ChatGPT/Claude) to generate the necessary code
    Implement in FlutterFlow
    Configure all integrations
    Test thoroughly
    Deploy to production

    #Why We Prefer AI-Assisted Development:
    Faster development time
    Modern, clean code
    Cost-effective approach
    Consistent code quality
    You can focus on implementation and optimization

    #Deliverables:
    Complete FlutterFlow project
    All features working smoothly
    Deployed web version
    iOS/Android build files
    Basic documentation
    Source code access in FlutterFlow

    #UI/UX Requirements:
    Modern, clean design similar to current AI apps
    Smooth animations and transitions
    Responsive design for all devices
    Credit balance prominently displayed
    Easy-to-use upload interface
    Professional payment flow

    #Ideal Candidate:
    Expert in FlutterFlow
    Comfortable using AI tools for code generation
    Can work independently with minimal supervision
    Understands modern app development practices
    Can deliver within timeline

    #To Apply:
    Confirm you're comfortable using AI tools for development
    Share 2-3 FlutterFlow projects you've built
    Estimate timeline for completion
    Brief explanation of your approach

    #What I'll Provide:
    FASHN.AI API credentials
    Stripe test keys
    Brand colors/preferences
    Feedback during development

    #Budget Note:
    $500-1000 depending on experience and proposed timeline. Price includes full implementation and deployment.
    Looking for someone who embraces modern development methods and can deliver a polished product efficiently!

    #Simplified Project Brief to Share:
    "Build a virtual try-on app where users can:
    Sign up/login
    Upload their photo + clothing photo
    Generate AI try-on (uses 1 credit)
    Buy more credits with Stripe
    View history of try-ons

    #Technical: FlutterFlow + Firebase + FASHN.AI API + Stripe
    Use AI tools to speed up development. Modern UI like current AI apps."

  10. [4787][ 1144038 ] 2 days (2025-08-02 17:34 PM)
    ~021951652880283361730
    web_mobile_software_dev • web_development • FIXED •
    4000.0 - -
    {"invitesSent" => 0, "totalInvitedToInterview" => 1, "totalHired" => 0, "totalUnansweredInvites" => 0, "totalOffered" => 0, "totalRecommended" => 0}
    Skills PostgreSQL • Docker • AWS Lambda • NGINX • Python • FastAPI • PostGIS •
    About Client ⭐️ 5.0 • 2 reviews • France • 8 jobs • $400 Lytvynov Production

    🚨 Urgent Hire: Python Backend Developer (FastAPI + PostGIS) – Remote

    We’re urgently looking for a Senior (or Strong Middle) Python Backend Developer with solid experience in PostGIS and FastAPI to join our team on a high-priority GIS-focused project.

    🔧 Project Overview
    You’ll be working on a geospatial platform that handles large volumes of data, including polygon storage and spatial queries. The backend is built with FastAPI, and PostGIS is used extensively for spatial operations.
    This is not a side project — we need someone fully dedicated and ready to dive in right away.

    🛠️ Requirements
    5+ years of experience with Python
    Strong knowledge of FastAPI
    Solid hands-on experience with PostgreSQL + PostGIS (geometry types, spatial indexing, performance)
    Ability to process and store large-scale geospatial data
    Confident working with optimized queries and performance tuning
    Familiarity with Docker, Git, async Python

    ➕ Nice to Have
    Experience with SQLAlchemy (async or standard)
    Familiarity with geospatial platforms, GIS data standards, GeoJSON

    📍 Engagement Details
    Start date: ASAP (ideally Monday)
    Duration: 6–7 weeks (full-time mission)
    Availability: You’re expected to be fully dedicated to this project during working hours
    Communication: Active availability on Slack, Google Meet for calls, daily async or sync check-ins
    We’re building fast, iterating weekly, and need a reliable teammate who treats this as a core project.

    Start from the phrase I understand that you're looking for someone for a 6–7 week engagement who will be available full-time during European working hours.