The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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:
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 134,286 reviews, clients rate our JSON Developers 4.9 out of 5 stars.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:
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 134,286 reviews, clients rate our JSON Developers 4.9 out of 5 stars.I’m looking for an experienced (Integromat) automation expert to build a fully automated lead generation and cold email workflow. This is NOT a beginner project. Only apply if you have strong experience with APIs and building complete automation systems. Workflow to build: 1. Input lead data (first name, last name, company/domain) 2. Generate multiple email patterns (e.g. @domain, firstinitiallastname@domain, etc.) 3. Send all generated emails to an email verification tool (MillionVerifier or similar) 4. Filter only valid emails 5. Automatically send valid emails into a Smartlead campaign via API 6. Ensure the entire process is fully automated (no manual steps, no CSV uploads) Requirements: - Strong experience with (routers, filters, iterators, error handling) - Experience work...
Node-RED is already running as a native integration inside my Home Assistant instance and is talking to HA through the built-in WebSocket, so the groundwork is done. I now need an expert who can turn that foundation into a fully featured automation suite that touches every room and every common scenario in the house. Scope of work I expect • Draft a detailed scope document that outlines every planned flow, scene, and automation. These should cover energy optimization, security routines, lighting moods, climate scheduling, presence-aware actions, notification logic, and any other “modern and advanced” use cases you have successfully delivered before. • Build time-based, event-triggered, and condition-based flows in Node-RED, making sensible use of sub-flows, templ...
I need a php script converted to output json. I have a php script that shows some data from my wordpress events canendar, but for some reason i can't figure out how to convert so it shows data in JSON format. Please let me know if you have worked with "theeventscalendar" from wordpress and have a look at the attached file. the attached file outputs this: Array ( [2026-05-02] => Array ( [meta_id] => 49177 [start_date] => 2026-05-02 20:00:00 [end_date] => 2026-05-03 02:00:00 [url] => [post_id] => 4409 [post_title] => Meghan Patrick LIVE ) [2026-05-27] => Array ( [meta_id] => 49248 [start_date] => 2026-05-27 19:00:00 [end_date] => 2026-05-27 23:30:00 [url] => [post_id] => 4422 [post_title] => Corb Lund - May 27 ) [2026-05-26] =>...
I’m looking for a Python-based service that, when given a vn template UUID, returns all key metadata for that video template in clean JSON. The response must include (at minimum) the template’s author, usage count, name, total duration, individual footages, cover-image URL, video preview URL, like count and any other native fields that come with the source data. Every endpoint has to be authenticated, so please wire in a simple token or JWT flow that I can later swap out for my production identity provider. The API will speak JSON exclusively for both requests and responses. I’m flexible on the exact Python framework—as long as the code is readable and well-documented—but FastAPI or Flask would keep things straightforward. Deliverables • Fully work...
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...
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 ...
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 ...
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...
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...
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 ...
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...
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...
I am looking for an experienced developer or data specialist who can help me obtain a simple and clean product feed for auto parts from specific brands available in TecDoc. What I need: • A structured file (CSV / Excel / JSON) • Product title • Product description • Image URLs (or downloadable images) • Ability to filter by specific brands • (Optional) Part numbers / references Important: I am NOT looking for the full complex TecDoc database. I need a simplified, ready-to-use feed that can be easily imported into an e-commerce platform. Preferred solution: • Extract data via TecDoc API OR other reliable sources • Clean and normalize the data • Deliver a lightweight, well-structured file Bonus if you can: • Automate updates (da...
I’m looking to wire up my Facebook Lead Ads with my self-hosted Odoo 19 CRM through n8n (Claude helpers are fine if you prefer them for parsing or enrichment). Every new lead on Facebook must appear in Odoo instantly, not in hourly or daily batches. Scope • Listen for Facebook Leads webhooks, handle the access-token refresh cycle automatically, and push data into Odoo’s CRM endpoints the moment a form is submitted. • Map and upsert Contact Information, current Lead Status, and all custom fields we capture on the form; nothing should be dropped. • Avoid duplicates by checking existing records in Odoo before insert. • Build the flow entirely in n8n, export it as a JSON bundle, and include a concise README explaining environment variables, Facebook App...
I need a set of Python 3 scripts that automate routine file-management chores so I no longer have to sort, rename, or archive files by hand. The focus is pure task automation: the scripts should watch one or more folders, apply rules I define, then move, rename, delete, or compress files accordingly. Think of it as a hands-free assistant that keeps my directory tree tidy day and night. You will receive a folder map, naming patterns, and the actions I want applied to each file type. Build the solution with standard libraries such as os, pathlib, shutil, zipfile, and, if scheduling is required, something lightweight like schedule or native cron/Task Scheduler compatibility. Clean, well-commented code and a brief README are essential so I can tweak paths or rules later without diving into th...
I’m launching a new WooCommerce site that must serve both retail shoppers and registered wholesale clients. The retail front-end has to feel modern and clean, while the B2B area needs robust tools for bulk ordering, custom pricing, and a smooth wholesale registration workflow. Core build requirements • Modern, responsive theme designed and implemented from scratch or on top of a lightweight starter. • Automated product import via API, scaling from an initial 1 000 SKUs to roughly 50 000 without time-outs or data loss (think REST, JSON/XML, or a custom PHP script tied into WooCommerce CRUD). • Dedicated B2B layer with tiered pricing, quick order forms, and approval-based account creation. • Banca Transilvania payment gateway fully integrated and tested for...
I need a Python-based bot that can open each abuse-report page, load the correct form, and submit the details I pass in via JSON or a simple CSV. The first three targets are non-negotiable—DCMA, Google, and Cloudflare—because I file most of my takedown notices there. I also want the same script to recognise when a domain’s WHOIS form is required and, if no form exists, fall back to sending a templated abuse email to the registrant or hosting provider. Headless automation with Selenium, Playwright, or another stable browser driver is fine as long as it reliably handles captchas, hidden fields, and dynamic JavaScript. The core logic should be cleanly separated so I can add more providers later without touching the form-filling engine. Deliverables • A fully comment...
I need a small server-side application that reads a .FIN file, extracts the M0 and M1 fiat balances it contains, converts those balances to USDC/USDT at the current rate, and routes the settlement through Blockchain. Here’s what matters most to me: • Codebase in Python. Please keep the structure clean, modular, and ready for unit tests so future maintenance is painless. • Direct integration with Circle Mint and Tether for issuing and redeeming USDC/USDT. If Circle’s API is temporarily unavailable we can discuss a fallback—Tether’s own API or an exchange gateway like Kraken—but Circle Mint is the primary path. • Accurate parsing of the .FIN format. The file can hold multiple currency rows, so the parser must detect fiat type, pull the M0/...
We are building an advanced indoor wayfinding kiosk system for multi-floor environments (hospitals, campuses, offices) and are looking for an Indoor Mapping / GIS Data Engineer to join our team. This role is critical in transforming CAD drawings into structured spatial data that powers navigation, search, and routing in our application. You will work closely with: Frontend team (Angular + Electron-based kiosk app) Backend team (Java Spring Boot – routing engine) What You’ll Do CAD & Map Processing Clean and standardize CAD (DWG) files Remove unnecessary layers and ensure consistency across floors Prepare drawings for data extraction GIS & Indoor Mapping Use ArcGIS or similar tools to convert CAD into structured indoor maps Create floor-wise map layers (rooms, corri...
I want to accept cryptocurrency through Payqora ( ) on my fully bespoke HTML / CSS / JavaScript site. The flow is straightforward—visitors will be making one-time purchases only—but I need the integration to feel completely native to the rest of the site. Alongside wiring up Payqora’s API (checkout widget, callbacks, webhooks or REST endpoints—whatever their latest docs recommend), I also need: • A custom-designed checkout page that matches my brand styles and loads seamlessly within the existing codebase. • Multi-currency support so prices can automatically switch between at least USD, EUR, and the major coins Payqora supports. • A lightweight, back-office transaction report—JSON or CSV export is fine—that pulls key details (TX hash...
I need someone who is very experienced with scrapping. I have 82 Christian Television channels on my web site. I pull show / program names and times from a json file onto my web site. The 1 (single) json file contains scrapped show names and show times for Weekdays and Weekends for multiple channels. The person who has done this for me many times in past is terrible at his job. I need hire someone who is accurate and can scrape not all 82 channels but rather more like 68 channels. You will do this for me once a month. You will scrape show names along with times / days for 68 channels. I will provide you all the links for tv guides on each web site for each channel. You will add scrape data into 1 big JSON file. You must follow my web site channel names, time zone and javascript l...
Χρειάζομαι έτοιμο κώδικα σε Visual Basic μέσα στο Microsoft Visual Studio Tools for Applications 2015 που να συνδέεται σε συγκεκριμένο API server. Τι ζητώ να κάνει ο κώδικας • Να ανοίγει ασφαλή σύνδεση (HTTPS) προς το καθο&...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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