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.

From 132,220 reviews, clients rate our JSON Developers 4.9 out of 5 stars.
Hire 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.

From 132,220 reviews, clients rate our JSON Developers 4.9 out of 5 stars.
Hire JSON Developers

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    18 jobs found
    PDF Text Extractor & Compiler
    6 days left
    Verified

    I need an application that reads a multipage PDF, pulls out all the text, and then pours that content into a fresh one-page PDF that follows a custom layout I already designed. The flow is simple: open PDF → extract every text element in reading order → map each string to its assigned field or zone in my supplied template → generate a brand-new single-page PDF ready for distribution. My design file shows exact font sizes, margins, headers, and footers, so the app must respect those specifications pixel-for-pixel. Dynamic text should auto-shrink only when a block overruns its allotted space; everything else should remain fixed. No images or tables need processing—pure text only. I’m open to your preferred stack (Python with PyPDF2/PDFPlumber, Java with PDFBox, o...

    $742 Average bid
    $742 Avg Bid
    148 bids

    I’m building a fully-automated lead generation engine and need an engineer who can wire everything together end-to-end. The core flow pulls prospects from Clodo, enriches them with Clay, sequences outreach through Apollo, syncs engagement data back to HubSpot, and surfaces every scored lead in a dedicated Slack channel. All of these services expose solid REST/GraphQL APIs, so the job is primarily about clean JSON handling and resilient workflow orchestration. Key functions I want in place: • Email outreaches, data enrichment, plus lead scoring and routing run automatically on every new record. • GitHub Actions triggers and monitors the pipeline, with Python scripts responsible for transformation, enrichment and retry logic. • Each step posts concise status and error m...

    $177 Average bid
    $177 Avg Bid
    17 bids
    OCR Blood Test Extractor
    6 days left
    Verified

    I have a set of blood-test reports that arrive as PDFs, and I need an accurate, repeatable way to extract only the test result section from each file. The patient demographics and doctor’s notes can be ignored; my focus is strictly on the numerical results, reference ranges, and units. Here’s what I’m looking for: • A lightweight script or small desktop tool (.NET Core + Tesseract, AWS Textract, or any engine you prefer) that ingests multi-page PDF blood panels and returns structured data—CSV or JSON is fine. • Clear mapping of the extracted fields to their respective test names as they appear in the PDF. • Reliability across differing lab layouts; most follow similar tables, but spacing and fonts vary. Acceptance criteria 1. Feed a sample...

    $139 Average bid
    $139 Avg Bid
    23 bids
    Website Data Scraper
    6 days left
    Verified

    We need a robust yet lightweight script that can automatically pull business details from a publicly accessible government website. The information to capture will centre on business details, such as registration numbers, business name, registration date, address, etc. The workflow should: • Navigate every relevant section of the site (pagination, search filters, subsidiary pages). • Extract the required fields accurately • Export clean, structured data to CSV and JSON A Python solution leveraging requests/BeautifulSoup or Scrapy is preferred, but I’m open to other dependable stacks if they handle rate-limits, retries, and potential CAPTCHA gracefully. The script must be easy to rerun on demand, with clear instructions for environment setup and any dependencies...

    $313 Average bid
    $313 Avg Bid
    120 bids
    ESP32 Table-Call Firmware
    5 days left
    Verified

    I’m putting together an MVP that lets guests press a single mechanical button at their table; the ESP32 lights up a WS2812 LED ring (powered directly from the ESP32) and reports the call to my Supabase backend. Your task is to write the complete device-side firmware and show it running on real hardware. Core behaviour • Idle until the button is tapped. • State machine: blue for the first 0-2 min, green for 2-5 min, red after 5 min. • A 3-second long-press closes the event and turns the LEDs off. • Solid, reliable debounce for the mechanical button. Networking The device connects over Wi-Fi, tags every event with restaurant_id, table_id and device_id, and posts JSON to the Supabase REST endpoint I’ll supply. If the network drops it should queue lo...

    $245 Average bid
    $245 Avg Bid
    55 bids

    I need a lean, battery-friendly Android app that can stream a smartphone’s GPS coordinates in real time. Once the user grants permission, the app should run as a foreground service, capture accurate latitude and longitude, and post them every few seconds to the REST endpoint I will provide. A small in-app Google Maps view must mirror the live position so we can confirm everything instantly. Please follow current Android 13 location-permission rules and make sure tracking survives reboots, Doze, and other battery optimisations. I will share the API spec; you may use Retrofit, Volley, or any modern HTTP client you prefer, as long as JSON payloads stay lightweight. Deliverables • Complete Android Studio project (Kotlin or Java) with well-commented code • Signed release A...

    $22 Average bid
    $22 Avg Bid
    13 bids

    I’m putting together a 25–30-page picture book that teaches the etiquette of cleanliness to children roughly 3-7 years old. The narrative should be driven primarily by the illustrations, with short lines of supportive text placed so the artwork stays front-and-center. Here’s the flow I have in mind: • You prepare a simple JSON file that lists every page and the visual concept for that page (character pose, key props, setting, mood, colour cues, etc.). • Using any AI image tool you prefer—Midjourney, DALL-E, Stable Diffusion—generate artwork that closely matches each concept. The goal is a cohesive, appealing style; near-replicas of the reference images I’ll share are fine as long as copyright is clear. • Lay the images and text in...

    $19 Average bid
    $19 Avg Bid
    13 bids

    We are looking for an experienced Shopify developer specialized in retail/eCommerce brands to build a high-quality, pixel-perfect website based on a fully designed Figma file. Every section, interaction, and micro-animation already lives in the design; your task is to translate that vision into a fast, responsive Shopify 2.0 theme that is easy for my team to manage from the Theme Editor. Key Requirements: • Recreate the Figma layouts down to spacing, typography, and motion cues. • Leverage Shopify’s Online Store 2.0 architecture, using JSON templates and modular Liquid sections so pages can be rearranged without touching code. • Load quickly (90+ on both desktop and mobile Lighthouse scores) and work flawlessly on all modern browsers and devices. • Include...

    $3374 Average bid
    $3374 Avg Bid
    277 bids
    AWS Deployment of Dual-Model
    4 days left
    Verified

    deploy a dual-model pipeline on AWS. Scope of Work Dual-Model Deployment: Deploy the Pillar-0 (Atlas architecture) for multi-finding classification across Chest, Abdomen, and Brain. Integrate Sybil-1.5 for specialized future lung cancer risk prediction (1–6 year horizon). Inference Pipeline & Report Generation: deploy pipeline that takes zipped DICOM files, performs 3D volumetric reconstruction, and runs concurrent inference. script (attached). This script shows how to read the (Zip file), stack of the medical pictures (DICOMs) into a 3D block, and run both the Pillar-0 model (for findings) and Sybil-1.5 (for cancer risk) -This tells AWS which specialized tools to install to read 3D medical images AWS Cloud Architecture: Host models on AWS SageMaker (GPU instances like m...

    $360 Average bid
    $360 Avg Bid
    94 bids
    GHL CRM & AI Integration
    2 days left
    Verified

    I run an Australian-based sales and marketing company that lives inside GoHighLevel (GHL). I’m ready to push the platform further by weaving in smart automation and data-driven insights, and I need someone who already speaks “GHL” fluently. Here’s what I’m looking to achieve: • Build and optimise automated workflows that keep leads moving without manual touch points. • Layer in AI chatbots for fast, on-brand conversations across web, SMS, and email. • Add predictive analytics so my team can see which prospects will convert next and where to focus energy. You’ll be connecting GHL with the right AI engines and marketing tools, tightening up integrations, and making sure every piece talks to the next—no data silos, no clunky h...

    $20 / hr Average bid
    $20 / hr Avg Bid
    94 bids

    Project Overview We are looking for an experienced Salesforce Service Cloud Consultant to help shape and scale a modern, data-driven Customer Service organization within a dynamic eCommerce environment. The focus of this role goes beyond standard configuration. You will actively design and implement a scalable and reliable service architecture, enabling efficient case handling, intelligent routing, and measurable service performance. You will work closely with business and product stakeholders to evolve Customer Service into a high-performing, insight-driven function. Responsibilities Design and implement a modern Service Cloud architecture aligned with scalable Customer Service operations Translate business needs into efficient, automated service processes with a strong focus ...

    $83 / hr Average bid
    $83 / hr Avg Bid
    62 bids

    Project Title: OEE Monitoring System Development (ESP32 + Node-RED + Orange Pi + MQTT + SQLite) --- Project Description: I am looking for an experienced developer to build and complete an industrial OEE (Overall Equipment Effectiveness) monitoring system based on my existing architecture. The system is already partially designed, and the web dashboard is already available. The main task is to complete the data acquisition, processing, and integration layers. This is an edge-based industrial system, not a simple web app. --- System Architecture Overview: Machine → ESP32 → Orange Pi → Node-RED → MQTT → Dashboard ↓ SQLite (historical data) ↓ Firebase (cloud sync) --- Scope of Work: 1. ESP32 Development - Read machine data via: - Digital inputs ...

    $35 Average bid
    $35 Avg Bid
    7 bids

    I have a small middleware layer that sits between two SaaS platforms, receives raw JSON, reshapes it, performs a few calculated roll-ups, and then pushes the cleaned payload back out through a remote API. The work is 100 % back-end: no HTML, no JavaScript, no database, just pure PHP. What I need you to do • Modify incoming data structures so they match the target schema (field mapping, nesting, key renaming, type casting). • Aggregate sets of records into concise summaries before dispatch (totals, counts, grouped objects). The code has to be clean, readable and function/procedural oriented, making smart use of native array functions, generators. We use our own framework based on vanilla PHP. Deliverables • A self-contained PHP that accept a JSON string or a GET/PO...

    $46 Average bid
    $46 Avg Bid
    80 bids

    Budget : 3k -5k : architecture is alredy created !!!URGENT support IT's Debuging job your job is to work and cunsult me and my team I have a full-length company financial report that arrives only as a PDF file and I want to turn it into something my local LLM (running through Ollama) can understand and answer questions on with reliable accuracy. The goal is a hands-off pipeline: I drop a fresh PDF into a folder, run a command, and then query the model for any figure—whether it sits in the balance sheet, income statement, or cash-flow section—and get a clean, correct response every time. What I need built • A script (Python preferred) that parses the PDF, captures every table and key figure, and outputs a structured data store (CSV, JSON, or SQLite—wh...

    $7 / hr Average bid
    $7 / hr Avg Bid
    20 bids

    I regularly handle a steady pipeline of Chinese mobile games—spanning RPG, FPS, puzzle and many other genres—and I’m looking for seasoned linguists who can turn every string into natural, engaging English while preserving gameplay intent and cultural nuance. What I need from you is a concise but detailed project proposal outlining your workflow (glossary building, CAT-tool setup, LQA process, style-guide adherence, file hand-off, etc.) and a few examples that demonstrate you can match tone across dialogue, UI, tutorials, store copy and live-ops content. Deliverables for each assignment will typically include: • Translated & proof-read string files (XLSX, CSV or JSON as provided) • Updated terminology/glossary sheets • A short context report ...

    $61 / hr Average bid
    $61 / hr Avg Bid
    8 bids

    I need a hands-on Oracle Fusion technical consultant to create and deploy custom APIs inside the Supply Chain Management cloud module. The focus is API development for reliable data integration between Fusion SCM and two external systems we run in-house. Your job starts with reviewing our current data model, then designing secure REST (and, where required, SOAP) services that move sales orders, inventory updates, and shipment confirmations in real time. You should be fully comfortable with Oracle Integration Cloud, Fusion Web Services, FBDI, role-based security, and the usual JSON/XML payload handling. I will supply a dedicated test pod, data-mapping spreadsheets, and Git access. We will meet online twice a week to review progress, and code must be committed through our repo so our inter...

    $448 Average bid
    $448 Avg Bid
    11 bids

    I need a clean, well-documented connection to the Mitel API that pulls three metrics—call duration, number of calls, and caller ID information—on demand. My end goal is to feed these figures into a web dashboard, which I’ll be building in PHP, so please structure the output as easily consumable JSON or a lightweight REST endpoint I can drop straight into the interface. You just have to start the connection, I will then make all the scripts/pages to show the stats I need, you just help to get the train going, so to speak. I myself will do all the heavy lifting. I just need help to get started. Here’s the flow I’m picturing: • Your code authenticates with Mitel, respects any rate limits, and retrieves the chosen statistics in near-real time. • Resu...

    $247 Average bid
    $247 Avg Bid
    186 bids

    Tenho um cardápio digital 100% funcional em HTML, CSS e JavaScript puro; o fluxo de pedidos via WhatsApp e o carrinho já operam corretamente. Agora preciso conectar tudo ao Firebase para que os produtos sejam carregados dinamicamente em vez de virem de um array local. O que preciso, de forma objetiva: • Configurar Firestore e Storage, criando a coleção de produtos (lanches e bebidas) exatamente no formato de objeto JSON que já defini. • Substituir o array local pela leitura desses dados no Firebase, mantendo a experiência atual intacta. • Ajustar IDs e qualquer detalhe de estrutura que garanta o funcionamento perfeito do carrinho. • Deixar o código limpo, organizado e comentado para facilitar ediçõ...

    $54 Average bid
    $54 Avg Bid
    14 bids

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