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Find jobsImprove your website’s responsiveness with expert Ajax developers. Build dynamic, real-time features—hire now and onboard quickly.
David is a frontend-leaning full-stack engineer working in SvelteKit, React, TypeScript, and Node.js. He built a fashion design platform from scratch as the product’s engineering lead, wiring generative model output into a fast SSR app, Stripe billing, and GCP delivery, and cut time-to-market by 40%.
Andy is a full-stack Node.js and React engineer who led the rebuild of a video doorbell platform across backend, firmware, and mobile, scaling it to 1M+ devices while cutting AWS costs by 80%. He also built a support copilot that cut ticket resolution from days to minutes and shipped ONNX models on edge devices.
Vitaliy is a front-end engineer working mainly in Angular and React who often comes in to rebuild aging products. He led an MVC-to-Angular migration for an ERP, helped move it toward micro-frontends, and later built web and desktop trading interfaces with OpenFin and real-time updates via Pusher.
Ahmed is a C#/.NET engineer who modernizes long-lived systems, most recently moving a global sports body's back office from .NET Framework 2 to .NET 8 with Blazor and Stripe. Earlier he was the main developer on a national employment-contract portal, cutting infrastructure from six servers to one.
Danyl is a React Native engineer who has spent the last several years rebuilding and shipping mobile apps, including a v2 iOS and Android app for a newcomer benefits platform. He has also led front-end teams, built a shared web/mobile UI library, and added OCR-based document scanning with Google ML Vision.
Bohdan is a React frontend lead who has spent the last few years on complex web apps, from a global network infrastructure platform with detailed data center visualizations to a widely used spend management product. He leads architecture, breaks down large component trees, and has replaced Redux with Context API where it fit better.
Jesús Miguel is a full-stack engineer working mainly in Node.js, TypeScript, and AWS, recently owning serverless booking services that sync flight changes with airline systems across European markets. Earlier he maintained an event-delivery platform for virtual clinical trials and built Lambda microservices for a Webby Award-winning ordering flow.
Kateryna is a .NET backend engineer who also ships full-stack features in Angular and React. As tech lead on a social-first booking platform, she moved 20+ repositories to .NET 6, improved search speed, and rebuilt logging; earlier she designed endpoint-level API security for a gamified promotions platform on Azure.
Denis is a React and Node.js full-stack developer who builds finance-heavy products, from real-time financial projection software in Next.js and GraphQL to retirement and personal finance tools with React, Nest.js, and Postgres. He has also shaped front-end architecture for a CRM with an integrated call center.
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How it works
Fill in a short form
Tell us about your Ajax project, timeline and hours, then look through our vetted developers.
Take a 30-minute call
A Lemon.io matching expert goes over your needs and gives you a budget estimate.
Meet 1–3 candidates
You get 1–3 developer profiles, usually within 24 hours. Interview them the way you normally would.
Start working
Your developer joins your team part-time or full-time and works directly with you.
Reached out on Monday evening, connected Tuesday morning, had four qualified candidates by Wednesday.
We had an excellent experience. Process is fast from the initial intake through setting up payment.
The developers helped us speed up. They quickly learned their part of the app and we’re grateful for their contribution.
We vet every developer
Every Ajax developer passes a live interview with a senior engineer. We accept 1.2% of applicants.
We hand-pick your matches
A matching expert picks people by your stack, domain and time zone, and tells you why each one fits.
We handle the paperwork
We handle contracts, NDAs and invoices. You pay Lemon.io, and we pay your developer.
We stay after you hire
Your Lemon.io manager stays in touch with you both. If it doesn't work out, we find a replacement for free.
The lemon tea
Forms that submit without a reload, live search, infinite scroll: AJAX is behind the parts of a site that feel instant. Our developers make them reliable too.
Race conditions handled
Candidates who forget stale requests, error states or CSRF tokens don't pass. Strong ones handle all three without being reminded.
Browse front-end profiles
Only Lemon lets clients search its vetted pool. Find AJAX work next to jQuery, React or Redux and pick the developers to meet.
Pay for what's logged
Small front-end fixes don't need a big contract. Billing follows logged hours, and unused prepaid time carries over.
Why hire AJAX developers
Live search and filters
Results that update as users type, without hammering your server.
Forms without reloads
Validation and submission that keep users on the page.
jQuery to fetch
Old jQuery ajax calls moved to modern fetch and async code.
Infinite scroll
Feeds and catalogs that load more content smoothly and accessibly.
The experience with Lemon.io has been fantastic. The interview process has been good, the caliber of people – excellent and integration has been very smooth.
We needed extra developers to clean off all these bugs so the company could skyrocket.
We needed extra AI engineers to keep our ambitious project running.
AJAX calls are made by JavaScript front-end applications to address the back-end services and APIs and to get data from the HTTP server.
Indeed, AJAX is still in use and very popular in 2024. It helps a web browser communicate through a server for quick and asynchronous responses due to user interactions without refreshing a full page. On top of that, being the main part of building interactive web applications, where the data is fetched, updated, or submitted in the background to the user, it improves user experience, reducing latency, and enhancing efficiency.
AJAX is ideal for developing complex web applications. It lets web pages be updated in the background without the complete web page reloading through sending and receiving a small amount of data from the server at a time. Thus, it provides a more efficient and faster experience.
AJAX stands for Asynchronous JavaScript and XML.
A good real-life case of AJAX is Google’s search bar. As you type, similar searches appear below, and you can scroll through them with the up and down keys. Autocomplete helps users filter inputs when filling in forms or searching. This makes searches quicker and more fun because users get results immediately.
If you are thinking about hiring an AJAX developer, there are a few steps you need to consider first:
1) Define your project scope, its features, functionalities, and objectives.
2) Define roles and responsibilities.
3) Search for a developer on freelance platforms, job boards, etc. If you need a quick solution, Lemon.io can match you with a skilled professional within 48 hours.
4) Screen their CV and portfolio. Target candidates who have strong skills in JavaScript, AJAX techniques like XMLHttpRequest or fetch API, knowledge of asynchronous programming, experience with front-end frameworks like React or Vue.js, and a portfolio reflecting the practical application of dynamic web applications.
5) Conduct soft skills and hard skills interviews.
6) Check references.
7) Make an offer and onboard the candidate.
You can hire an AJAX developer through Lemon.io in 48 hours. All the developers have already passed our vetting process, including VideoAsk, their me.lemon profile completion, a screening call with our recruiters including various technical questions, and a technical interview with our developers. We will ensure a fast and comfortable hiring process while matching you with the best AJAX developers in the industry, as only 1% of applicants are accepted into our community.
Lemon.io provides up to 20 prepaid risk-free hours with our AJAX developer to review how they complete real tasks on your projects. Otherwise, it is a zero-risk replacement guarantee: if the previous developer doesn’t meet your expectations or misses deadlines, we will find a new one for your project.
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