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 133,204 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 133,204 reviews, clients rate our JSON Developers 4.9 out of 5 stars.I need a Python-driven bot that lives on my website and reliably takes care of two chores for me: 1) Automated form submissions – the script should fill in and submit web forms (both on my own site and a few external ones) using data I feed it, handle validation messages, and log every attempt so I can audit what was sent. 2) Text-only web scraping – on a schedule I define, the same bot should visit specific pages, extract the text I specify (headlines, paragraphs, table cells, etc.), and save it to a structured format (CSV or JSON is fine). Clean, well-commented code is essential. Feel free to build with Selenium, Playwright, Requests/BeautifulSoup, or a mix—whatever gets the job done smoothly on a typical Ubuntu server. A simple settings file or admin panel whe...
**Long-Term Opportunity | Bangla Communication Mandatory** I'm looking for a highly skilled, experienced, and independent **Browser Automation & Website Reverse Engineering Specialist** for a long-term project. I need someone who can deeply analyze how websites work, understand browser behavior, investigate complex technical issues, identify root causes, and develop reliable solutions. **My priority is simple: I need working solutions, not just code.** ## Required Technical Expertise - Advanced JavaScript and/or Python programming - Tampermonkey Userscripts and Chrome Extensions - Browser Automation (Playwright, Puppeteer, Selenium, etc.) - Advanced DOM manipulation and MutationObserver - Dynamic websites, SPAs, and asynchronous JavaScript - AJAX, Fetch API, REST APIs, JSON, ...
I already have a React-based site running and now need a handful of new pages that focus on user interaction. The work breaks down into three tightly-linked pieces: • User-centric pages – Build clean, responsive screens that guide visitors through sign-ups, in-app actions and profile management. React Router is set up; your components just need to slot in smoothly. • Blog integration – Pull and render blog posts from an existing JSON feed (or Markdown files if you prefer). Infinite scroll or classic pagination is fine as long as loading feels seamless. • Interactive quizzes – Create a reusable quiz component that supports single- and multi-choice questions, real-time scoring and a final results screen. Animations and progress indicators should feel sna...
**** MUST HAVE PROVEN EXPERIENCE Project Overview We are looking to develop a secure, sleek, reliable and user-friendly mobile application that provides our customers with seamless access to our existing money transfer website through a simple, intuitive mobile interface. Our money transfer platform is mature and already integrates with multiple money transfer and exchange service providers. We want to leverage this existing investment by developing a lightweight mobile application that acts as a secure gateway to our website and its services. The application should allow customers to log in, navigate through a simple menu of key services, and seamlessly access the relevant sections of our existing mobile website to complete their transactions. The key services will include: -Money T...
I have a personal list of several thousand archived URLs on the Wayback Machine and need a repeatable workflow that can process them in bulk. For every snapshot the workflow should: • Pull out the full text content, all embedded images, and any available metadata (titles, descriptions, dates, alt tags, etc.). Give separate selectors so I'm able to extract only the required data. • Save a clean, self-contained copy of the page so it can be opened offline as a standalone webpage. A option to go discover for subpages and extract data from them too. • Generate a parallel JSON file that structures the same information in a machine-readable way. Speed and resilience matter; the run must cope with large batches without timing out or getting blocked by the Wayback servers....
WordPress Real Estate Marketplace Developer – Houzez + Property Feed/API + SEO Our Financial Health (OFH) is seeking an experienced WordPress real estate developer to build an apartment-search marketplace connected to our existing website. We are looking for someone who has experience with Houzez, real-estate listing feeds/APIs, CSV/XML/JSON imports, and Google SEO. PROJECT GOAL We want to create an OFH-branded apartment marketplace where consumers can search thousands of available rental properties across multiple U.S. cities and states. We plan to obtain rental inventory through a licensed property-data provider such as HousingFeed. We DO NOT want someone to manually enter listings. The property feed must automatically: * Import new listings * Update existing listings * Rem...
I have a sizeable batch of raw photographs that must be turned into a clean, AI-ready image-classification dataset. Every file simply needs a single or multi-label tag that tells my model whether it contains Vehicles, People, or both. No bounding boxes or pixel-perfect masks are required—just accurate whole-image labels. You’ll work in the annotation tool of your choice (LabelImg, CVAT, VoTT, Roboflow, etc.) as long as the final export is compatible with standard machine-learning pipelines. A comma-separated CSV or JSON with filename-to-label mapping is perfect. Selected classes • Vehicles • People Deliverables • Completed project file or export (CSV/JSON) listing each image and its assigned class(es) • The original images left unaltered in thei...
# C++ Developer – Desktop Companion Overlay for MMORPG We are seeking an experienced **Senior C++ Developer** to help build a high-performance desktop companion overlay for an MMORPG-inspired gameplay experience. The application will provide real-time gameplay assistance, intelligent recommendations, and a seamless in-game overlay while maintaining excellent performance and minimal system impact. ## Responsibilities * Design and develop a lightweight real-time desktop overlay for Windows. * Implement gameplay assistance and recommendation systems based on live game state information. * Build a modern transparent UI with customizable layouts and hotkey support. * Develop profile management, settings synchronization, and configuration tools. * Ensure high performance, low latency, ...
I run a sports website and want to embed reliable live-score data without constantly switching providers. I’m after an API (or an existing feed you have access to) that pushes real-time cricket scores—specifically for One Day Internationals and T20 matches—with refreshes every single minute. What I need from you: • A stable, permanently available endpoint that I can query via JSON or XML. • Clear documentation showing all request parameters and sample responses for the ODI and T20 score calls. • An example call integrated into a simple PHP, Node, or Python snippet so I can verify the feed on my server. • Assurance that the feed covers all major international fixtures in those two formats and remains active season after season. Once I&rsqu...
I need a Windows-focused developer who can turn XMRig into a background service for a fleet of mining PCs I already operate. The goal is simple: once the installer runs, XMRig should install the rig with the needed program, start automatically with the OS, and apply my custom CPU tuning without any visible console or tray icon. Key details • Target OS: Windows 10/11 on consumer-grade hardware • Required tweak: XMRig custom setup as it runs (no GPU work) • One-click or fully installer preferred (Inno, NSIS, or your tool of choice) Deliverables 1. Compiled XMRig binary with my CPU config baked in (or an editable JSON if you have a smarter approach) 2. installer/​script that registers the miner as a background service and confirms successful launch 3. Brief usage:...
I am currently working on an existing CRM web application and need an experienced developer to help me fix a few issues in the project. The project is already developed, so I am NOT looking for someone to rebuild the CRM from scratch. I mainly need 1–2 hours of hands-on technical help from someone experienced with the existing stack. What I need help with: Identify and fix existing backend/API issues Debug code Resolve frontend-to-backend communication problems Fix request/response or JSON-related issues Check existing API logic and suggest corrections Explain the root cause of the issues so I can continue working on the project myself This is a short-term debugging/mentoring task, expected to take around 1–2 hours. I would prefer someone who has strong experience wit...
We are looking for a Python developer for a small data cleaning and processing project. The task involves working with a provided dataset, identifying data quality issues, and preparing the data in a clean and consistent format for further use. Scope of Work:- * Review and understand the provided dataset. * Identify and remove duplicate or irrelevant records. * Handle missing, incomplete, or inconsistent data. * Standardize text and data formats where required. * Clean and normalize user-generated/text-based data. * Apply basic Natural Language Processing techniques where needed. * Create a reusable Python script for the data cleaning process. * Integrate the processing logic with a basic Django backend/API. * Provide the cleaned dataset along with the source code. Requirements:- * Stro...
I’m enhancing an existing PHP application and now need an experienced developer to wire in several third-party services. The core of the job is to analyse each provider’s endpoint requirements, extend or refactor the current codebase where necessary, and make sure the new integrations run smoothly alongside what is already in production. You will be working with modern PHP (object-oriented, namespaced) on a LAMP stack, so familiarity with RESTful requests, webhooks, JSON handling, and robust error logging is essential. Security is a must—token management, input sanitisation, and graceful failure states all have to be considered from the outset. I’ll give you access to the repository, environment details and any documentation the vendors supply. Your work should pl...
Saya ingin menambahkan proses verifikasi identitas di aplikasi saya melalui email / SMS dengan fokus utama pada nomor telepon. Target saya sederhana: setiap pengguna baru harus memasukkan nomor ponsel, menerima kode OTP, lalu memverifikasi akun mereka sebelum bisa melanjutkan. Ruang lingkup yang saya butuhkan: • Pengaturan gateway SMS (Twilio, Firebase, atau penyedia lokal—mana pun paling efisien dan terjangkau). • Endpoint backend untuk membuat, mengirim, dan memvalidasi OTP. • Contoh front-end singkat (HTML / JS) yang memicu permintaan, menampilkan form kode, dan menangani respons verifikasi. • Mekanisme pengamanan dasar—pembatasan percobaan, masa berlaku kode, dan pencatatan (logging). • Tes end-to-end agar saya bisa langsung melihat alur &l...
Saya membutuhkan sebuah aplikasi penjualan berbasis Android yang siap dipakai toko kecil sampai menengah. Fokus utamanya adalah pembayaran online terintegrasi sehingga pelanggan dapat menyelesaikan transaksi langsung di aplikasi tanpa berpindah ke kanal lain. Keunikan yang saya inginkan ada pada fleksibilitas tampilan: pengguna akhir harus bisa mengganti tema kustom sendiri (misalnya gaya font, ikon, set warna utama) tanpa perlu keahlian teknis. Saya ingin perubahan tema terjadi instan, cukup diatur dari menu pengaturan sederhana. Ruang lingkup pekerjaan: • Kembangkan aplikasi Android native atau Flutter/React Native—mana yang paling efisien—dengan modul pembayaran online (midtrans, xendit, atau gateway serupa). • Sediakan sistem manajemen tema kustom: file JSON...
Sto sviluppando un’applicazione che deve dialogare direttamente con il cloud TTLock tramite le loro REST API. Mi occorre un’integrazione pulita e ben documentata che mi permetta di controllare da remoto le serrature (apertura, chiusura, creazione/cancellazione e gestione di e-keys e codici temporanei). Scenario – Dispongo già di un account developer TTLock e di tutte le credenziali (clientId, clientSecret, redirect URI). – Il mio software gira su un server Linux; sono flessibile sul linguaggio purché l’SDK o il codice sia open-source e facilmente manutenibile (Node.js, Python o PHP vanno benissimo). – L’integrazione verrà poi richiamata da un gestionale interno; non servono CMS, CRM o ERP preconfezionati. Di cosa ho bis...
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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