Hire the Top 3% of Freelance Quorum Developers

Toptal is a marketplace for dedicated Quorum developers, engineers, programmers, coders, architects, and consultants. Top companies and startups choose Toptal Quorum freelancers for their mission-critical development projects.

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance Quorum Developers and Engineers

Janko Krstic

Freelance Quorum Developer
SerbiaToptal Member Since July 27, 2018

Janko is a software engineer and architect specializing in blockchain and focusing on decentralized finance and self-sovereign identity (SSI). He has years of experience with Bitcoin, Ethereum, Quorum, Fabric, Tendermint, Cosmos blockchains, and Hyperledger Indy and Aries SSI solutions. Janko has recently applied modern distributed systems, cryptography, and blockchain theory to solving SSI-related problems.

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Kaustav Chakraborty

Freelance Quorum Developer
IndiaToptal Member Since October 9, 2021

Kaustav is a hands-on, goal-oriented, versatile technology professional with more than two decades of experience, primarily in open-source digital technologies, such as blockchain, IoT, microservices, cloud, distributed architecture, R&D, design, and development, with a proven track record delivering consistent business results. He loves to take on technical challenges, learn about new technology innovations, and deliver successful products worldwide.

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Vidor Gencel

Freelance Quorum Developer
SerbiaToptal Member Since April 30, 2018

Vidor is a Computer Science Ph.D. candidate actively doing research and development in the blockchain space with a focus on Tendermint, Ethereum, and Hyperledger. He has been involved in software development since a young age and has participated in the development of different software solutions for microprocessors, core banking, the web, and money-handling equipment. Vidor has strong business English and years of remote-working experience.

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Yary Ribero

Freelance Quorum Developer
EstoniaToptal Member Since November 5, 2020

Yary is a software engineer with a multinational history of successful projects, quite diverse in duration, tech stack, and background. A proactive person, he enjoys all aspects of business project development: from theoretical to technical and practical. With expertise in designing solutions, choosing the tech stack, and leading small teams of developers, he carries projects from design to live deployment.

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Patryk Matuszewski

Freelance Quorum Developer
PolandToptal Member Since February 11, 2014

Patryk is a software engineer who loves creating new things. He develops efficient solutions to meet client requirements. He enjoys helping clients come up with clear visions of their needs. Patryk loves to make the whole development process clear and efficient, implementing the best available options for a specific problem—he has experience using approaches like continuous delivery, Scrum, TDD, ATTD, BDD, and extreme programming.

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Alok Rao

Freelance Quorum Developer
IndiaToptal Member Since April 28, 2021

In his eight years of coding, Alok has juggled many hats. He's built apps for phones, the web, and desktops and worked on monolithic APIs and interconnected microservices. As a blockchain tech lead, he developed pilot apps on Hyperledger Fabric and R3 Corda to manage private equity on a blockchain platform. He's coded solo, led teams, and co-founded his own company. He can dig into a codebase quickly or whip one up from scratch. Alok enjoys interesting projects regardless of the tech stack. ​

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Alexis Wilke

Freelance Quorum Developer
United StatesToptal Member Since November 19, 2018

Over the past 16 years, Alexis has been running Made to Order Software, mainly as a contractor, doing software development for customers in Sacramento, San Francisco, LA, the Netherlands, and more. Alexis specializes in PHP, JavaScript, jQuery, JSON, HTML/CSS, XML, XSLT2, Go, C/C++, Assembly, CUDA, Microsoft Access, and a broad range of other technologies. He has created and manages many websites. He had also worked on an embedded medical device.

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David Bong C. C.

Freelance Quorum Developer
JapanToptal Member Since September 7, 2022

David is a senior full-stack blockchain engineer with 20 years of experience in software engineering. He has demonstrated vast knowledge and technical skills across various industries such as oil and gas, telecommunications, banking, and enterprise solutions, including developing a large-scale enterprise solution for the global company Royal Dutch Shell. David picked up the latest blockchain technology and skills and is a Certified Blockchain Solution Architect.

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Michal Mikolajczyk

Freelance Quorum Developer
PolandToptal Member Since September 17, 2014

Michal is a senior software engineer and community leader for Toptal Warsaw. He communicates well and takes the initiative needed to help startups scale. Michal writes clean, functional code, automates infrastructure, and enjoys coordinating and scoping tasks. A former digital nomad, Michal speaks at conferences, and writes articles for the Toptal Blog. His professional interests include blockchains and artificial intelligence.

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Pedro Cunha

Freelance Quorum Developer
PortugalToptal Member Since December 12, 2018

Pedro is an experienced full-stack developer with a master's degree in computer engineering. With 4+ years of expertise, he's skilled in Java, Spring, and Hibernate in addition to Kafka, Akka actors, Apache Storm, and Zookeeper.

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Toptal in the press

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

Our clients
Creating an app for the game
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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 startup, they are our secret weapon.

Brantley Pace

CEO & Co-Founder

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

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

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

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

How to Hire Quorum Developers Through Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering will work with 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 Quorum developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

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

FAQs

  • How are Toptal Quorum developers different?

    At Toptal, we thoroughly screen our Quorum developers to ensure we only match you with talent of the highest caliber. Of the more than 200,000 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.

  • Can I hire Quorum developers in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a Quorum developer within 48 hours of signing up.

  • What is the no-risk trial period for Toptal Quorum developers?

    We make sure that each engagement between you and your Quorum developer 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.

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 talent within 48 hours 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 Quorum Developers Are in High Demand.

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