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.
De 133,355 opiniones, los clientes califican nuestro JSON Developers 4.9 de un total de 5 estrellas.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.
De 133,355 opiniones, los clientes califican nuestro JSON Developers 4.9 de un total de 5 estrellas.Ya tengo un flujo n8n en funcionamiento que coloca operaciones simples, pero ahora necesito implementar lo que llamo "Opción B": gestión de estado completa, soporte para pedidos complejos y un interruptor de apagado confiable. La integración debe hablar directamente con la API de Charles Schwab, por lo que la experiencia probada con ese corredor específico es esencial. Lo que queda por construir • Lógica de estado: cada posición abierta y pedido pendiente debe rastrearse continuamente, con actualizaciones de estado guardadas en mi instancia de PostgreSQL y empujadas a Telegram en tiempo real. • Pedidos complejos: el flujo tiene que crear, monitorear y, cuando sea necesario, cancelar pedidos de OCO (Uno Cancela Otro) utilizando l...
I need a custom section added to my Shopify product pages that shows shoppers a carousel of items they have recently viewed. The section should pull the data dynamically, respect Shopify’s native product information, and render smoothly on both desktop and mobile. Swiping or arrow navigation must be supported, and it has to inherit my theme’s typography and colour palette so it looks native rather than bolted on. Here is what I expect: • Liquid/JSON template code for the section, plus any supporting JavaScript and CSS. • Configuration settings in the theme editor so I can toggle the section on or off and adjust the maximum number of items shown. • Clean, well-commented code so future theme updates won’t break it. I’ll consider the task complet...
I need a custom section added to my Shopify product pages that shows shoppers a carousel of items they have recently viewed. The section should pull the data dynamically, respect Shopify’s native product information, and render smoothly on both desktop and mobile. Swiping or arrow navigation must be supported, and it has to inherit my theme’s typography and colour palette so it looks native rather than bolted on. Here is what I expect: • Liquid/JSON template code for the section, plus any supporting JavaScript and CSS. • Configuration settings in the theme editor so I can toggle the section on or off and adjust the maximum number of items shown. • Clean, well-commented code so future theme updates won’t break it. I’ll consider the task complet...
Every day my team completes the same online application forms across multiple sites, and I want that repetitive work gone. The goal is a lightweight Chrome extension (Manifest V3) that detects an online application form as soon as the page loads, pulls the correct data from a local JSON (or similar configurable store), and inserts each value into its matching field instantly—no clicks, no copy-paste. Key expectations • Accurate field matching for common input types (text, email, phone, date, dropdowns). • A simple options page where we can edit, import or export the profile data that will feed the autofill. • Ability to handle multi-step application flows by remembering data between steps. • Runs entirely client-side; no data should leave the browser with...
Every day my team completes the same online application forms across multiple sites, and I want that repetitive work gone. The goal is a lightweight Chrome extension (Manifest V3) that detects an online application form as soon as the page loads, pulls the correct data from a local JSON (or similar configurable store), and inserts each value into its matching field instantly—no clicks, no copy-paste. Key expectations • Accurate field matching for common input types (text, email, phone, date, dropdowns). • A simple options page where we can edit, import or export the profile data that will feed the autofill. • Ability to handle multi-step application flows by remembering data between steps. • Runs entirely client-side; no data should leave the browser with...
Tenho três apps de streaming de canais de TV já publicados (Android TV, Roku e Amazon Fire Stick) que leem um único JSON endpoint com as imagens dos canais e seus respectivos links m3u8. Quero agora também um app publicado na Smart TVs LG (webOS) e Samsung (Tizen). O fluxo de dados, navegação e lógica podem seguir o padrão existente; só preciso de pequenas adaptações visuais para combinar melhor com cada plataforma, nada radical. O app continuará simples: na primeira tela o usuário vê os logos dos canais, escolhe um e a reprodução começa em m3u8. Sempre que altero o JSON, o lineup se atualiza automaticamente. O que espero receber de você: • Pacote instalá...
**Job Title:** Convert Tampermonkey Script to Production-Ready Node.js Backend (Automation Logic Only) **Project Description:** I need an experienced developer to convert an existing Tampermonkey/JavaScript automation script into a **production-ready Node.js backend system**. This is **backend logic only**. I do NOT need frontend/UI work. The script currently contains request automation, OTP flow, concurrency logic, token/session handling, retry mechanisms, captcha integration, request cancellation, automation timing, and persistent storage logic. The developer must rewrite the logic cleanly into a scalable Node.js backend architecture. --- ### Scope of Work Convert the existing Tampermonkey script into a **pure Node.js backend** with proper architecture and clean code. The backend...
I’m extending my own e-commerce automation software and need expert guidance on TallyPrime 7.0’s Sales Voucher Creation API. The main objective is to pipe order data from my platform straight into Tally without manual entry, so I’d like to understand the best-practice workflow for “integration with external systems.” Here’s what I’m after: • A short remote session (or two) where you walk me through authentication, payload structure, and endpoint setup for creating sales vouchers in real time. • Sample XML/JSON requests that match TallyPrime 7.0’s schema, plus clear notes on mapping common e-commerce fields (order ID, taxes, discounts, payment modes). • Advice on handling duplicate checks, batching, and any error responses Tall...
My small-business loyalty program is already up and running; the only missing link is the piece that lets customers drop their card straight into Apple Wallet and Google Wallet. I’ve handled the rest of the stack myself, so I’m after a focused, standalone integration rather than a full rebuild. What I need • Generation of secure .pkpass files for iOS and the equivalent Google Wallet objects. • A clean API endpoint that I can call from my existing backend (authentication is via simple API keys) to issue each pass. • The pass must update automatically whenever a customer earns points or a new reward is unlocked; no manual refreshes. • Brief setup instructions or inline documentation so I can maintain it going forward. Tech context The current a...
I’m building a light-weight API layer on top of several security controls and need it wired through n8n. The goal is to pull telemetry from my EDR, MFA, and DLP platforms, funnel everything into n8n workflows, and expose the results through carefully-designed Express endpoints or Direct to Firestore DB. Here’s what I need built and handed back: • A set of n8n workflows that call each product’s native API, normalise the payloads, and forward them to an internal collection queue. • An Express server that acts as the single entry point. Each endpoint should return aggregated data in JSON and trigger automated report generation when requested. • Reporting jobs (inside n8n) that run on a schedule or via endpoint hit, producing summary reports in a common f...
I already have a working n8n flow that places simple trades, but I now need to roll out what I call “Opción B”: full state management, support for complex orders, and a reliable kill-switch. The integration must talk directly to the Charles Schwab API, so proven experience with that specific broker is essential. What’s left to build • State logic: every open position and pending order must be tracked continuously, with status updates saved to my PostgreSQL instance and pushed to Telegram in real time. • Complex orders: the flow has to create, monitor, and — when required — cancel OCO (One Cancels Other) orders using Schwab’s REST endpoints. • Kill switch: a single flag in n8n (manual boolean, plus an optional webhook) should imme...
This project centres on building a polished, responsive QML interface in Qt Design Studio for a consumer-grade embedded cooking appliance. The hardware already runs an embedded Linux stack with Qt 6; what I need now is a visually appealing, touch-friendly UI that guides the user through recipe selection, real-time temperature / time adjustments, and status feedback (progress rings, alerts, completion chimes). You will receive: • design requirements for the screens • the brand colour palette, logo assets and icon set Your job is to translate those references into production-ready QML components and an . project that plugs straight into the existing codebase. Animations should be efficient enough for an ARM Cortex-A7 with GPU acceleration enabled; keep draw calls low and avoi...
I am looking for an experienced Pine Script developer to convert a specific trend following indicator into a private, fully automated Strategy script for TradingView. The goal is to automate my trading on charts using a direct Webhook connection to FXCM. Convert an existing public indicator (logic to be provided upon hiring) into a strategy script. The strategy must support automated position flipping (Close Short/Open Long and vice versa). Webhook Integration: The script must generate a clean JSON payload compatible with FXCM’s webhook requirements. User Inputs: I need the following parameters to be adjustable in the script settings: Position Size (Units) Stop Loss (Pips) Take Profit (Pips) Performance: Must be optimized for Renko bricks to ensure the entry fires on the fir...
I need a self-contained n8n workflow that can do two things in one run: 1) generate a complete blog article and publish on the wordpress 2) immediately analyse and validate the user’s prompt or follow-up questions sent to the AI, making sure they are clear, relevant and free of banned or problematic content before the answer goes live. Inside n8n the agent should: • Receive a trigger (manual, cron or webhook – whatever you find simplest to demo). • Pass the initial prompt to your preferred text-generation node or an HTTP call to an external model; n8n orchestration is the key requirement here. • Capture the raw AI output, format it into a publish-ready article (title, headings, body, conclusion). • Run a second step that inspects the question or ...
Power Apps Developer – Job Description (5+ Years Experience) We are looking for an experienced Microsoft Power Apps Developer with 5+ years of experience in designing, developing, and implementing business applications using the Microsoft Power Platform. Key Responsibilities Develop and maintain applications using Power Apps (Canvas & Model-Driven Apps). Build and automate workflows using Power Automate. Integrate Power Platform solutions with SharePoint, Dataverse, SQL Server, APIs, and Microsoft 365. Create dashboards and reports using Power BI. Develop custom connectors and integrations with third-party systems. Collaborate with business stakeholders to gather requirements and deliver scalable solutions. Troubleshoot, optimize, and enhance existing applications. Ensure secur...
I already have a custom board built around an ESP32-D, the accompanying PlatformIO project, and fully working low-level drivers for Wi-Fi, MQTT, GPIO and storage. What I still need is the high-level logic that ties everything together so the device behaves like an intelligent Wi-Fi switch. Here is what the finished sketch must do: • Subscribe to a dedicated MQTT topic and parse the JSON commands coming from my mobile app. • Execute each command immediately, switching the relay output on or off and publishing an acknowledgement with a timestamp. • Monitor the on-board push-button; every manual activation should be time-stamped, stored locally, and later pushed to the same MQTT broker so that no event is ever lost if the connection drops. • Run both daily and week...
I need a compact Android app written in Java (Android Studio) that starts itself as soon as the phone boots, locks on to a high-accuracy GPS fix, and posts that latitude-longitude pair to my REST endpoint. The server’s JSON reply carries a single integer—how many minutes the app should wait before the next post—and the app must respect that interval for every subsequent transmission while the phone is on. Key behaviours • High-accuracy location only: use the fused-location provider with GPS priority. • Runs completely in the background, surviving task-kills and device reboots (JobScheduler / WorkManager or a foreground service with a silent notification—whichever meets current Play-services constraints). • If a fix is impossible, simply retry a...
I need an open, fully documented REST-style API that can sit between Ship ERP and our current Truck Management System, letting the two platforms talk to each other in real time. The core responsibilities of this new layer are: • Real-time status updates – the moment a shipment moves, both systems must reflect it. • Data synchronization – orders, loads, and reference data must stay consistent on both sides. • Rate engine – an endpoint that can accept lane details, weight, and accessorial flags, then return our calculated rate instantly. Key data points that the endpoints must expose or consume include tracking numbers, current shipment status, and system-generated rate calculations. Technical expectations – JSON over HTTPS; versioned endpoints...
Full Stack Developer Needed : Healthcare AI Platform Deployment (React + FastAPI + Huawei Cloud) We are looking for a highly skilled Full Stack Developer with strong system analysis and DevOps capabilities to work on an enterprise healthcare AI platform deployment. The ideal candidate should be capable of reading, understanding, analyzing, enhancing, and deploying an existing codebase independently with minimal supervision. ## Project Scope The platform includes: * Dashboards * AI Agent Hub * User & Access Management * WhatsApp Notifications * Multi-branch Healthcare Operations The deployment target is Huawei Cloud infrastructure. ## Technical Requirements ### Frontend * React.js * TypeScript * Dashboard development * RBAC-based UI routing * API integrations * Responsive enter...
Full Stack Developer Needed : Healthcare AI Platform Deployment (React + FastAPI + Huawei Cloud) We are looking for a highly skilled Full Stack Developer with strong system analysis and DevOps capabilities to work on an enterprise healthcare AI platform deployment. The ideal candidate should be capable of reading, understanding, analyzing, enhancing, and deploying an existing codebase independently with minimal supervision. ## Project Scope The platform includes: * Dashboards * AI Agent Hub * User & Access Management * WhatsApp Notifications * Multi-branch Healthcare Operations The deployment target is Huawei Cloud infrastructure. ## Technical Requirements ### Frontend * React.js * TypeScript * Dashboard development * RBAC-based UI routing * API integrations * Responsive enter...
Manhattan MIF / ProActive Developer C2H Position Anywhere in India[Remote] Work Timing: 2 to 11 pm IST Yr of exp - 6+ The Senior Manhattan MIF (Manhattan Integration Framework) / ProActive Developer will lead the design, development, and optimization of integrations and event-driven solutions within the Manhattan WMS ecosystem. This role requires strong technical expertise in Manhattan Active/WMOS architecture, MIF integrations, and ProActive configuration, along with the ability to guide junior developers and collaborate with cross-functional teams. Key Responsibilities MIF Integration Development Design and develop inbound and outbound interfaces using Manhattan Integration Framework (MIF) Configure and manage integration endpoints, services, and message queues Develop X...
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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