JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.

Here's some projects that our expert JSON Developers made real:

  • Troubleshooting and creating scripts to transfer data through JSON into webpages
  • Developing modules to integrate dynamic solutions with transport APIs
  • Writing scripts using PHP, Java or Python to store, read and update databases
  • Building search result interfaces or flight search results
  • Connecting websites with local servers using JSON solutions
  • Providing solutions to scrape data from various sites
  • Developing product bundling rules using Dynamic Discounts in eCommerce platforms
  • Automating AWS documents involving sending emails with all outputs with SSM Document
  • Creating PowerShell scripts to convert data to CSV from an API

Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.

Dari 133,902 ulasan, klien menilai JSON Developers kami 4.9 dari 5 bintang.
Rekrut JSON Developers

JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.

Here's some projects that our expert JSON Developers made real:

  • Troubleshooting and creating scripts to transfer data through JSON into webpages
  • Developing modules to integrate dynamic solutions with transport APIs
  • Writing scripts using PHP, Java or Python to store, read and update databases
  • Building search result interfaces or flight search results
  • Connecting websites with local servers using JSON solutions
  • Providing solutions to scrape data from various sites
  • Developing product bundling rules using Dynamic Discounts in eCommerce platforms
  • Automating AWS documents involving sending emails with all outputs with SSM Document
  • Creating PowerShell scripts to convert data to CSV from an API

Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.

Dari 133,902 ulasan, klien menilai JSON Developers kami 4.9 dari 5 bintang.
Rekrut JSON Developers

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    Pernyataan Pekerjaan
    30 pekerjaan ditemukan

    I’ve already sketched out an n8n workflow that connects Shopify events to WhatsApp messaging and finally pushes the results into a custom flow inside my AOC panel. The overall goal is to streamline communications between these three services so orders, status updates, and customer-service triggers move automatically without manual intervention. Where I’m at now: • Basic Shopify webhook node is live and receiving payloads. • WhatsApp Cloud API credentials are set but messages aren’t consistently firing. • The custom AOC panel endpoint still needs mapping to the data that arrives back from WhatsApp. Where I need your help: 1. Review the existing n8n nodes, clean up the JSON handling, and make sure each step passes the exact data structure the next s...

    $16 Average bid
    $16 Rata-rata
    9 penawaran

    I have an Excel workbook that stores my customer, product and order information. I want the data exposed through a clean GraphQL endpoint running on Mule 4 so that any client can query or update it without touching the raw spreadsheets. The job is centred on two things I specifically need: data transformation and data integration. First, the data sitting in the Excel sheets must be converted—via DataWeave—into tidy JSON objects that match the GraphQL schema. Second, that transformed output has to be integrated into a GraphQL service inside Anypoint, with resolvers wired up and ready to run. What I expect from you • A Mule 4 project (exportable from Anypoint Studio) that reads the Excel file, performs the DataWeave transformation and exposes the GraphQL endpoint. &bull...

    $77 Average bid
    $77 Rata-rata
    3 penawaran
    Fix n8n Workflow Configuration Errors
    6 Hari left
    Terverifikasi

    I need a sharp pair of eyes on my existing n8n workflow. A few of basic errors are stopping the automation from completing, and I’d like someone who knows their way around n8n’s editor to jump in, diagnose, and patch them quickly. I already have the error messages on hand and will share them as soon as we connect, so you can go straight to reproducing and resolving the issue. Scope • Identify the root cause of each reported error. • Adjust node settings or workflow logic so the flow executes end-to-end without throwing exceptions. • Walk me through what you changed so I can maintain the workflow myself in the future. Deliverable An updated .json export of the workflow plus a short summary of fixes applied—and, of course, a run that completes succe...

    $11 Average bid
    $11 Rata-rata
    17 penawaran
    VTT Automation Program Development
    6 Hari left
    Terverifikasi

    I run a home-grown virtual tabletop simulation and would like to replace the handful of spreadsheets and manual clicks with one cohesive Windows desktop app. The goal is to automate three core areas: resource management, combat resolution, and the various turn-by-turn trackers that keep the session running smoothly. The interface needs to be an intuitive GUI—think drag-and-drop character panes, quick-access buttons for initiative, real-time stat bars, and a clean dashboard where I can toggle optional house-rules on the fly. Under the hood, I need solid data handling so that hit points, spell slots, cooldowns, and inventory stay in sync even when multiple NPCs are involved. If a player swings a sword, I want the dice rolled, modifiers applied, and results logged to the history panel ...

    $464 Average bid
    $464 Rata-rata
    103 penawaran

    Project Description We're looking for an experienced developer to build a fully automated poker bot that can play in free online poker tournaments (play-money / freerolls). This is a research and hobby project — not for real-money play. The system needs to combine game theory optimal (GTO) strategy with exploitative adjustments based on an expert human player's decision-making framework that we will provide. The bot should be able to join a table, read the game state visually, make decisions, and execute actions — all autonomously. What We're Building (3 Core Systems) 1. Poker Decision Engine (The Brain) Implement a GTO baseline strategy using frameworks like OpenSpiel, PokerRL, or equivalent Build an exploitative layer on top that adjusts based on opponent tend...

    $26 / hr Average bid
    $26 / hr Rata-rata
    114 penawaran
    REST API JMeter Script
    6 Hari left
    Terverifikasi

    I want to work with a Jmeter expert freelancer remotely for few hours this weekend. Im beginer to intermediate level with jmeter. I need a reusable JMX file that will let me stress-test our REST API. The flow is straightforward: first, the script must obtain an OAuth 2.0 access token and keep it available for every subsequent sampler; next, it should hit the file-upload endpoint and push a sample CSV using multipart/form-data. Please capture all correlation values (token, upload IDs, etc.) with regular expressions or JSON extractors so the run can scale with multiple virtual users. The test plan has to be cleanly organised with clear naming, user-defined variables for host, credentials, and file path, and a separate thread group ready for ramp-up tuning. Deliverables • A JMX f...

    $26 Average bid
    $26 Rata-rata
    24 penawaran

    I’m building an Android-only sports application that focuses on delivering fresh match highlights to fans and alerting them the moment a new clip is available. The core of the project is straightforward: smooth video playback, a clean Material-inspired interface, and reliable real-time notifications. Here is what the finished product must do: • Install on Android 10+ and present a scrollable feed of recent highlights pulled from my existing JSON/CDN source. • Stream each clip in HD without stutter and allow basic share functionality. • Trigger push notifications (Firebase Cloud Messaging or a comparable service) within seconds of a new highlight being published. • Follow best practices for maintainable, modular code so I can layer in live score updates or player ...

    $22 / hr Average bid
    $22 / hr Rata-rata
    148 penawaran

    I need a solid, one-week turnaround on a VBA solution inside Microsoft Access that links our on-premise Horizon MRP Plus database to the cloud-hosted Easy System platform (). The goal is full invoice-data automation: pull the records from Horizon, transform them to the JSON schema required by Easy System, then push and retrieve them through an SFTP endpoint. All work happens inside an existing Access front-end—tables, queries, and forms are already in place, and I can share the current VBA modules that handle local processing. What is missing is the external hand-off and the return feed, plus robust logging so accounting can see exactly what went out and what came back. Key points you’ll tackle: • Write or extend VBA routines that assemble invoice headers, line items, an...

    $68 Average bid
    $68 Rata-rata
    29 penawaran
    Betfair API Data Retrieval (AU/UK)
    5 Hari left
    Terverifikasi

    Hi, ******Need someone ONLY AND ONLY from AUSTRALIA AND UK ONLY for my betfair apis development. I’m expanding an existing trading suite and now need clean, reliable access to Betfair’s Market Data API. Because of licensing considerations, I can only work with developers physically based in Australia or the United Kingdom. Scope of work – Connect to the Betfair Exchange API (non-interactive login is already in place on my side) – Retrieve real-time odds, price ladders and market status updates for Horse Racing, Football, Tennis and Cricket markets only – Structure the responses so they can be consumed by my Python back-end (JSON is fine) – Handle throttling limits and session renewal gracefully Deliverables 1. Well-commented source co...

    $2092 Average bid
    $2092 Rata-rata
    40 penawaran
    Apify Scraping Actor Development
    5 Hari left
    Terverifikasi

    I have a set of websites whose data I need to capture automatically, and I want the whole process built as a reusable Apify actor. I will share the exact URLs, the fields to be collected, and the desired output format once we agree to proceed, but the common theme is structured extraction (think product specs, profile info, or similar). Here’s the outcome I’m expecting: • A clean Node.js actor that runs on the Apify platform, uses the latest Apify SDK, and follows best practices for request queuing, proxy rotation, and error handling. • Configurable input schema so I can plug in new target URLs or tweak search parameters without touching the code. • Output saved to an Apify dataset (JSON/CSV) and pushed to my Google Drive via webhook on each successful r...

    $83 Average bid
    $83 Rata-rata
    22 penawaran
    Full-Month .NET React Maintenance
    5 Hari left
    Terverifikasi

    I need an experienced .NET and React developer who can give my product a full-time focus—eight hours a day for the next month—while working side-by-side with my lead engineer during Indian Standard Time. The codebase is already in production; our goal over the coming weeks is to tidy up rough edges, harden performance, and keep new issues from sneaking in as we roll out incremental updates. Tech stack you’ll touch daily: ASP.NET Core APIs, a React front end that leans on hooks and functional components, JSON-heavy data exchange, and Azure resources provisioned with Bicep. You’ll be handling pull requests, writing clean commits, and jumping on quick Teams or Slack calls whenever a change needs clarification. Expect a straightforward workflow—branch, code, PR, ...

    $723 Average bid
    $723 Rata-rata
    106 penawaran

    I need help standing up and running a live device farm—roughly 2,000 TikTok accounts split across a bank of smartphones and tablets. The remit is very specific: the profiles don’t have to read like handcrafted influencers; instead they can rely heavily on automated workflows, as long as they stay alive and functional. Geo lacation needs to be targeted and must use gps mock app Core workflow – Provision new accounts in bulk, bind them to rotating residential or mobile proxies, and keep device fingerprints clean so TikTok’s risk flags stay low. – Push mostly automated likes and comments at scale; these two metrics matter most because they feed the viral-loop signals we are measuring. – Capture and warehouse performance data (engagement rates, ret...

    $115 Average bid
    $115 Rata-rata
    30 penawaran

    I’m extending an in-house web application and need a React specialist who can work on-site in Hyderabad for the duration of the sprint. The core UI is already scaffolded; what’s missing is the feature layer and the API wiring. Here’s what you’ll be shaping: • Integrate RESTful APIs, GraphQL endpoints, and several third-party services directly into the React codebase, ensuring consistent error handling and state management. • Build secure user authentication flows (signup, login, token refresh) that hook cleanly into our existing backend. • Add real-time notifications—WebSocket or SSE is fine as long as latency stays low and the UI updates smoothly. • Implement reusable data-visualisation components (think charts, graphs, dashboards)...

    $605 Average bid
    $605 Rata-rata
    57 penawaran

    Título del proyecto Interoperabilidad Historia Clínica Electrónica – SQL Server 2008 / Access 2003 Descripción Busco freelance para adaptar un sistema de salud existente desarrollado en SQL Server 2008 (compatibilidad 80) y Access 2003, para cumplir la Resolución 1888 de 2025 (Colombia) sobre interoperabilidad de la Historia Clínica Electrónica (HCE). El desarrollo debe permitir generar y exponer el Resumen Digital de Atención en Salud (RDA) a partir de la información clínica ya almacenada, garantizando interoperabilidad con otros actores del sector salud. Alcance Construcción del RDA desde la base de datos actual. Formato interoperable (XML o JSON según lineamientos). Implementación de u...

    $209 Average bid
    $209 Rata-rata
    22 penawaran

    I already have a custom-built PHP admin panel coded and sitting on a staging server. What I now need is for it to be fully wired up to both my Android APK and the public-facing website, then pushed live without downtime. The panel must seamlessly handle user management, content management and data analytics once everything is connected. Expect to work with the existing PHP codebase, set up any required REST or JSON endpoints, and make sure the APK can talk to them securely (token-based auth is already in place but still needs hooking up). On the web side the same endpoints should feed the live site so that any update made in the panel is reflected instantly. After integration I’ll rely on you for end-to-end deployment: • move the panel and website to production hosting (cPan...

    $100 Average bid
    $100 Rata-rata
    33 penawaran
    Java Pack to Bedrock
    3 Hari left
    Terverifikasi

    I’m running an ItemsAdder-powered server that will soon update to 1.21.6, and I need the existing Java-edition resource pack brought over to Bedrock so that cross-play players see the exact same custom content. The job focuses only on the pack’s textures and 3D models; sounds are already handled. I’d like all work done inside Blockbench so that I can easily tweak or expand the assets later. Please keep the resolution, file structure, and naming consistent with the current Java pack, then rebuild whatever has to change for Bedrock’s JSON format and manifest. Optimizing polygon counts and texture size for Bedrock performance is essential, but visual fidelity must remain identical. Deliverables (acceptance criteria) • Bedrock-ready resource pack folder with , ...

    $16 Average bid
    $16 Rata-rata
    16 penawaran
    eSIM API WooCommerce Plugin
    3 Hari left
    Terverifikasi

    I run a WooCommerce shop that sells international eSIM packages. My eSIM supplier exposes a REST-based API and I need a custom WordPress plugin that bridges WooCommerce with that API. Core goals • On successful checkout the plugin must call the supplier’s endpoint to activate a new eSIM profile and return the QR code / activation data to the customer. • After activation, store the profile ID in the order meta so I can manage it later from the admin side. • Pull data-usage stats on a configurable schedule (cron is fine) and show the current balance in the customer’s My-Account area as well as in the admin order screen. • Offer a simple “support” tab in the My-Account area where customers can trigger an API call to refresh usage or open a ti...

    $456 Average bid
    $456 Rata-rata
    199 penawaran
    Income Tax Memo Automation
    3 Hari left
    Terverifikasi

    I’m kicking off the first block of a long-term income-tax automation program and need a Python engineer who can stand up a Prefect-based pipeline that automatically drafts tax memos. In this phase we are zeroing in on the drafting step itself; risk checking and further enrichment will follow in later blocks. Here’s the workflow you will build: • Inputs arrive through automated ingestion (think API push or scheduled fetch) as already structured tax fact patterns plus a skeletal memo outline. • A Prefect flow then orchestrates a chain of LLM modules, RAG retrieval, and enrichment tasks. • The flow returns a JSON-wrapped memo draft that a human reviewer can open immediately in our internal tools. You’ll be free to choose the most appropriate vector store, e...

    $24 / hr Average bid
    $24 / hr Rata-rata
    105 penawaran

    I need a lightweight, well-structured scraper that can navigate a specific website and harvest two pieces of information from every public user profile: the profile picture (image file or URL, whichever is more practical) and the bio section. No emails or activity logs are required—just these profile details. Your script should: • Visit every reachable user profile, including through pagination or internal search pages • Extract the bio text and the profile picture, storing the image locally or saving its direct link next to the bio in a CSV/JSON file • Respect , employ modest request throttling, and handle the site’s usual edge cases—lazy-loaded images, occasional 4xx/5xx responses, and any login or cookie notices that appear for anonymous visitors ...

    $72 Average bid
    $72 Rata-rata
    34 penawaran

    I have a fully built ecommerce website in HTML/CSS/JS (premium design + animations + quiz + wishlist/compare + cart drawer). I need it converted into a Shopify Online Store 2.0 theme while keeping the front-end 100% identical (pixel-perfect) on desktop and mobile. No redesign and no rebuilding from Dawn or any other theme. Keep the same UI, layout, classes, fonts, spacing, and animations. Shopify will be used as the backend for products/collections, cart, checkout, and orders. The existing UI must be connected to Shopify using Liquid + JSON injection for product data and Shopify Ajax Cart API for cart actions. Predictive search integration is preferred. Deliverable: a ready-to-upload Shopify theme ZIP + setup instructions + final QA with no console errors. FEW DAYS MORE THAN A WEEK DONT AP...

    $295 - $886
    Bersegel
    $295 - $886
    329 penawaran

    Single DocType to handle 3 types of stock movements in ERPNext factory operations: Material Receipt (receive stock into warehouse) Transfer to V8 (move stock to production line) Internal Transfer with Delivery Note (warehouse-to-warehouse with e-way bill) Goal: Replace manual Stock Entry + Delivery Note creation with one unified interface. FUNCTIONAL REQUIREMENTS 1. Transaction Types & Behavior Transaction Type Source WH Target WH Documents Created E-Way Bill Material Receipt None Required Stock Entry (Material Receipt) No Transfer to V8 Required Auto V8 Stock Entry (Material Transfer) No Internal Transfer Required Required Stock Entry + Delivery Note Yes* *E-way bill when value > ₹50,000 OR generate_eway_bill = YES 2. Core Fields Required Parent DocType: "Material Movement En...

    $149 Average bid
    $149 Rata-rata
    18 penawaran
    Planetary Data Table Tool
    2 Hari left
    Terverifikasi

    I need a desktop application that builds a planetary longitude, latitude, and aspect table using the Swiss Ephemeris for daily use. Requirements: - Support for input and output formats: CSV, JSON, XML - User-friendly desktop interface Ideal Skills: - Experience with Swiss Ephemeris - Proficient in desktop application development - Familiar with handling CSV, JSON, and XML data formats - Strong programming skills in either Python, JavaScript, or C++

    $2218 Average bid
    $2218 Rata-rata
    67 penawaran
    Plugin PocketMine CustomHeads
    1 hari left
    Terverifikasi

    Quiero ampliar las posibilidades de mi servidor Bedrock con un plugin propio que utilice la librería Customies (PocketMine API 5.0.0, PHP 8.2.30). Objetivo Necesito un plugin independiente en el que pueda colocar fácilmente mis modelos 3D creados en Blockbench y que estos se registren como “cabezas” al estilo Java, pero totalmente compatibles con PocketMine. Además de cabezas, quiero admitir: • Bloques y elementos personalizados • Sombreros y mascotas • Alas y armaduras Funcionalidades clave • Inventario personalizado para que los jugadores puedan obtener y equipar los ítems. • Animaciones únicas asociadas a cada modelo, aprovechando el sistema de Customies. • Integración de modelos media...

    $30 Average bid
    $30 Rata-rata
    6 penawaran

    I need a production-ready Apify actor that reliably gathers building-permit data from one or more U.S. county websites and returns a clean, structured dataset each time it runs. The core goal is to capture every new building-permit record along with its key fields such as permit number, issue date, project description, address, contractor and valuation and make that information instantly usable in my downstream workflows. Here is what matters most to me: • Robust navigation & parsing The actor should handle dynamic pages, pagination, CAPTCHAs, and the usual quirks of county portals without manual intervention. • Configurable targeting I’ll provide the list of counties once we start. The actor should accept a county URL (or ID) as an input parameter so I can...

    $147 Average bid
    $147 Rata-rata
    58 penawaran

    I need a Tampermonkey script that works with Canvas to download all student discussion comments in a readable PDF format. I believe I have found three scripts through Github that will work -- but can't seem to figure out how to get a JSON file from Canvas. I've attached some ideas to this textbox of what I've found thus far. Requirements: - Comments should be in PDF format - Include timestamp of each comment Ideal skills and experience: - Proficient in Tampermonkey scripting - Familiar with Canvas platform - Experience generating PDFs programmatically

    $127 Average bid
    $127 Rata-rata
    48 penawaran

    Need a full-time dedicated developer (not part-time freelancer) to build custom Shopify themes from scratch and develop private apps. This is hard coding only - no theme customization via drag-and-drop. Required Skills: 1. Shopify 2.0 Theme Development (JSON templates, sections, metaobjects) 2. Shopify App Development (Node.js/React, Shopify CLI, GraphQL Admin API) 3. Liquid, JavaScript, React, Polaris 4. Git version control & performance optimization

    $229 Average bid
    $229 Rata-rata
    60 penawaran

    I’m expanding the Bespoke Labs review team and need a seasoned software engineer to judge the quality of code-centric tasks, agentic benchmarks, and reinforcement-learning environments that feed directly into frontier AI research. Your main job will be to open up the model’s work, think like a senior engineer, and decide whether the solution is correct, efficient, and reproducible. Day-to-day you’ll pull assignments from our queue, spin up the provided repo or Colab, and work through automated and manual checks. When something fails, you’ll pinpoint the issue, add concise reviewer notes, and push a resolution verdict that downstream researchers can trust. Most of the work happens in Python with a healthy dose of shell tooling, git, and containerised test harnesses,...

    $12 / hr Average bid
    $12 / hr Rata-rata
    17 penawaran
    Convert Microdata to JSON-LD
    23 jam left
    Terverifikasi

    My JTL-Shop e-commerce template still relies on inline microdata. I want every trace of that markup replaced with modern, search-engine-friendly JSON-LD. The scope is site-wide: product pages, category pages, the home page and any other template files that expose structured data important for SEO. You will extract the existing information, rebuild it as compact JSON-LD snippets and reintegrate them through the JTL-Shop templating system. When you are finished, no microdata attributes should remain; all structured data must validate in Google’s Rich Results Test without warnings. Deliverables • Clean JSON-LD for products, categories, front page and any additional sections that currently use microdata • Updated template files ready to deploy on JTL-Shop • One va...

    $569 Average bid
    $569 Rata-rata
    121 penawaran

    This project aims to develop a custom Frappe application that automates the conversion of PDF purchase orders into Sales Orders in ERPNext. The system will eliminate manual data entry, reduce processing time, and minimize errors by automatically extracting customer information, item details, quantities, and pricing from uploaded PDF documents and creating validated Sales Orders. Reduce sales order processing time by 70-80% Eliminate manual data entry errors Enable faster order fulfillment and improved customer satisfaction Process multiple PDF formats from different customers Maintain accurate audit trails for all automated transactions Project Scope In Scope Custom Frappe app development for PDF processing ​ PDF text extraction and OCR capabilities for scanned documents Data valida...

    $129 Average bid
    $129 Rata-rata
    13 penawaran

    We're seeking an experienced backend developer to implement a comprehensive EDI (Electronic Data Interchange) integration system for our 10-minute delivery platform. The project involves building robust API integrations for Purchase Order creation, acknowledgment, and Advance Shipment Note (ASN) synchronization between our retail system and vendor/supplier systems. Project Scope The integration consists of two primary modules: 1. Purchase Order (PO) EDI Integration ​ Implement webhook endpoints to push PO creation data to vendor systems in predefined formats (JSON/XML) Build PO acknowledgment flow to receive processing status from vendor systems Handle synchronous and asynchronous PO processing workflows Support both immediate response and delayed acknowledgment patterns 2. Advan...

    $182 Average bid
    $182 Rata-rata
    7 penawaran

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