Hire the Top 3% of Freelance JSON Expert

Toptal is a marketplace for top JSON Expert. Top companies and start-ups choose Toptal JSON freelancers for their mission-critical software projects.

No-Risk Trial, Pay Only If Satisfied.

Trusted by leading brands and startups

Hire Freelance JSON Expert

Vadim Dagman

Freelance JSON Experts

United StatesToptal Member Since July 5, 2013

Vadim is a seasoned freelance software developer, architect, technical manager, and entrepreneur with over 25 years of professional experience. He has built many complex world-class software products from start to finish, spanning numerous platforms. He has worked both individually and as a group leader.

Show More

Zenel Rrushi

Freelance JSON Experts

AlbaniaToptal Member Since March 7, 2018

Zenel started his developing journey in 2015 where he began by getting the most of various technologies like SQL Server, PHP, jQuery, HTML, and CSS. Later, he started working as a back-end (PHP) developer and was soon promoted to team lead. During his career, he’s also worked and managed teams of all sizes while using the following frameworks and technologies: Magento (1 & 2), Laravel, Lumen, CodeIgniter, Vue.js, and Fusio PHP framework.

Show More

Tomasz Czura

Freelance JSON Experts

PolandToptal Member Since November 29, 2015

Tomasz is an Android developer who specializes in creating user-friendly and useful applications with the newest technologies. He enjoys experimenting with different languages and technologies, extending his skill set beyond Android to tasks leveraging React or iOS. Tomasz makes it a personal goal to ensure the client is fully satisfied, and often likens the process of software development to writing a good, interesting novel.

Show More

Vedran Aberle Tokić

Freelance JSON Experts

CroatiaToptal Member Since June 9, 2015

Vedran is a JavaScript based front-end developer with a broad experience in many areas that always end up going back to what he loves doing most: problem solving user interfaces. He's addicted to hearing the reaction, "It can do that!?"

Show More

Luciano Greiner dos Santos

Freelance JSON Experts

BrazilToptal Member Since September 19, 2015

Luciano is a seasoned professional with a decade and a half of experience developing Java enterprise applications. Currently, he's focused on big-data technologies such as Spark, Cassandra, Kafka, and Elasticsearch. He's capable of working as a full-stack engineer, having also worked with JavaScript and AngularJS in the past. Luciano is also fluent in English, has a native level in Portuguese, and has basic Spanish speaking abilities.

Show More

Pere Casafont

Freelance JSON Experts

SpainToptal Member Since April 9, 2015

Pere is a software architect with over a decade of experience working on Java services ranging from custom binary protocols to REST APIs on Spring. He also has a considerable experience with front-end, ranging from raw C++ OpenGL to Ionic apps. His most remarkable strength is his ability to work on and refactor all kinds of codebases. He is very communicative, proactive, and committed to the projects he works on.

Show More

Rodrigo Donini

Freelance JSON Experts

BrazilToptal Member Since September 9, 2016

Rodrigo is a focused developer who produces digital projects for agencies around the world. He has 18 years of experience using various methodologies and tech in most web and mobile projects. He has a strong knowledge base of the WordPress world and is very engaged with the community: building custom themes, plugins, and core customizations. He specializes in WordPress, developing for the front-end back-end and in managing digital projects.

Show More

Aitizaz Khan

Freelance JSON Experts

United StatesToptal Member Since December 4, 2015

Aitizaz is a full-stack engineer with expertise in Ruby on Rails and Java. He is keenly interested in algorithm-level efficiency and has experience working both with front-end and back-end technologies as well as frameworks. Aitizaz is also a competitive programmer who actively participates in different online challenges. He loves learning about anything, especially if it make him better at his craft.

Show More

Patryk Pawłowski

Freelance JSON Experts

PolandToptal Member Since October 27, 2016

Patryk is a seasoned full-stack developer who specializes in all types of modern JavaScript implementations—from architecting the back end and APIs to building pixel-perfect web and mobile apps. Thanks to his experience running his own company and having a background in design, he is a great facilitator between business and product teams. Partryk also enjoys speaking at conferences.

Show More

Jorge Nicolás Cellerino

Freelance JSON Experts

ArgentinaToptal Member Since January 12, 2016

Jorge has many years of experience working with Java and related frameworks like Spring and Hibernate, lately focused on Agile methodologies for building RESTful web services for mobile and web applications. Jorge is responsible, proactive, and fast learner, committed to results and well accustomed to working with distributed teams in different time zones.

Show More

Piotr Dziubinski

Freelance JSON Experts

PolandToptal Member Since December 27, 2016

Piotr is a veteran full-stack developer with over 15 years of experience, mainly focusing on Oracle development. He ie experienced with SQL databases (Oracle, MS, MYSQL, and more) as well as big data. He has worked on the front end and back end—developing with Java, Java EE, HTML, CSS, Angular, JavaScript, Oracle, ETL, DWH, Oracle BI, and many others.

Show More

Sign up now to see more profiles.

Start Hiring
Trustpilot
Toptal in the press

... allows corporations to quickly assemble teams that have the right skills for specific projects.

Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.

Our clients
Building a cross-platform app to be used worldwide
Thierry Jakicevic
Building a cross-platform app to be used worldwide
1
2
3
Creating an app for the game
Conor Kenney
Creating an app for the game
1
2
3
Leading a digital transformation
Elmar Platzer
Leading a digital transformation
1
2
3
Testimonials

Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of tripcents as any in-house team member of tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a start up, they are our secret weapon.

Brantley Pace, CEO & Co-Founder

Tripcents

In addition to sharp technical skills, Faruk had a great attitude and is a really exceptional communicator. He always let us know where he was with his work, thoroughly and reliably. That's not always the case, and it made working remotely considerably easier. He was an easy integration into the team.

Leif Abraham, Co-Founder

AND CO Ventures Inc

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley, Director

K Dunn & Associates

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller, CEO

Radeeus

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik, Co-Founder

ProHatch

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee , Principal

Site Specific Software Solutions

We used Toptal to hire a developer with extensive Amazon Web Services experience. We interviewed four candidates, one of which turned out to be a great fit for our requirements. The process was quick and effective.

Abner Guzmán Rivera, CTO and Chief Scientist

Photo Kharma

Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.

Dennis Baldwin, Chief Technologist and Co-Founder

PriceBlink

Working with Marcin is a joy. He is competent, professional, flexible, and extremely quick to understand what is required and how to implement it.

André Fischer, CTO

POSTIFY

We needed a expert engineer who could start on our project immediately. Simanas exceeded our expectations with his work. Not having to interview and chase down an expert developer was an excellent time-saver and made everyone feel more comfortable with our choice to switch platforms to utilize a more robust language. Toptal made the process easy and convenient. Toptal is now the first place we look for expert-level help.

Derek Minor, Senior VP of Web Development

Networld Media Group

Toptal's developers and architects have been both very professional and easy to work with. The solution they produced was fairly priced and top quality, reducing our time to launch. Thanks again, Toptal.

Jeremy Wessels, CEO

Kognosi

We had a great experience with Toptal. They paired us with the perfect developer for our application and made the process very easy. It was also easy to extend beyond the initial time frame, and we were able to keep the same contractor throughout our project. We definitely recommend Toptal for finding high quality talent quickly and seamlessly.

Ryan Morrissey, CTO

Applied Business Technologies, LLC

I'm incredibly impressed with Toptal. Our developer communicates with me every day, and is a very powerful coder. He's a true professional and his work is just excellent. 5 stars for Toptal.

Pietro Casoar, CEO

Ronin Play Pty Ltd

Working with Toptal has been a great experience. Prior to using them, I had spent quite some time interviewing other freelancers and wasn't finding what I needed. After engaging with Toptal, they matched me up with the perfect developer in a matter of days. The developer I'm working with not only delivers quality code, but he also makes suggestions on things that I hadn't thought of. It's clear to me that Amaury knows what he is doing. Highly recommended!

George Cheng, CEO

Bulavard, Inc.

As a Toptal qualified front-end developer, I also run my own consulting practice. When clients come to me for help filling key roles on their team, Toptal is the only place I feel comfortable recommending. Toptal's entire candidate pool is the best of the best. Toptal is the best value for money I've found in nearly half a decade of professional online work.

Ethan Brooks, CTO

Langlotz Patent & Trademark Works, Inc.

In Higgle's early days, we needed the best-in-class developers, at affordable rates, in a timely fashion. Toptal delivered!

Lara Aldag, CEO

Higgle

Toptal makes finding a candidate extremely easy and gives you peace-of-mind that they have the skills to deliver. I would definitely recommend their services to anyone looking for highly-skilled developers.

Michael Gluckman, Data Manager

Mxit

Toptal’s ability to rapidly match our project with the best developers was just superb. The developers have become part of our team, and I’m amazed at the level of professional commitment each of them has demonstrated. For those looking to work remotely with the best engineers, look no further than Toptal.

Laurent Alis, Founder

Livepress

Toptal makes finding qualified engineers a breeze. We needed an experienced ASP.NET MVC architect to guide the development of our start-up app, and Toptal had three great candidates for us in less than a week. After making our selection, the engineer was online immediately and hit the ground running. It was so much faster and easier than having to discover and vet candidates ourselves.

Jeff Kelly, Co-Founder

Concerted Solutions

We needed some short-term work in Scala, and Toptal found us a great developer within 24 hours. This simply would not have been possible via any other platform.

Franco Arda, Co-Founder

WhatAdsWork.com

How to Hire JSON Expert through Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering will work you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-Selected Talent

Within days, we'll introduce you to the right JSON experts for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new JSON experts for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

FAQs

  • How are Toptal JSON expert different?

    At Toptal, we thoroughly screen our JSON expert to ensure we only match you with talent of the highest caliber. Of the more than 100,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You'll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs. Start now.

  • Can I hire JSON expert in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a JSON experts within 48 hours of signing up. Start now.

  • What is the no-risk trial period for Toptal JSON expert?

    We make sure that each engagement between you and your JSON experts begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you're completely satisfied with the results, we'll bill you for the time and continue the engagement for as long as you'd like. If you're not completely satisfied, you won't be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial. Start now.

Tap Into World-Class Talent

  • Trusted Experts Only

    Trusted Experts Only

    All of our talent are seasoned experts who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

  • The Right Fit

    The Right Fit

    We have a knack for matching you with the right fit. Start working with your new hire on a no-risk trial period, paying only if satisfied.

  • Scale as Needed

    Scale as Needed

    Hire in under 2 weeks and scale your team up or down as needed, no strings attached.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDA’s. Let us take care of the overhead while you focus on building great products.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.

  • Expert Talent Matching

    Expert Talent Matching

    Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.

Top JSON Expert are in High Demand.

Start Hiring
By continuing to use this site you agree to our Cookie Policy.