Hire the Top 3% of Freelance OpenZeppelin Developers

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

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance OpenZeppelin Developers and Engineers

Warren Schwartz

Freelance OpenZeppelin Developer
South AfricaToptal Member Since December 28, 2021

Warren has been in software development for the last 20 years, and he has delivered hundreds of successful projects. In the previous four years as a CTO, he has proudly led a team of five developers to produce some great apps using blockchain and conventional tech.

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John McLaughlin

Freelance OpenZeppelin Developer
United StatesToptal Member Since September 12, 2022

John has professional experience developing Ethereum decentralized apps (dApps), including an NFT factory and marketplace deployed on Mainnet and L2 chains such as Polygon, Arbitrum, Optimism, and zkSync. He has created two video/audio storage apps using IPFS/Filecoin and designed and deployed a Hyperledger Fabric permissioned blockchain to organize McKurz Capital's financials. John has also designed container orchestrations using Docker and Kubernetes for various web2 and web3 apps.

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Emre Tapcı

Freelance OpenZeppelin Developer
TurkeyToptal Member Since February 25, 2022

Emre is a seasoned Full-Stack Engineer with over two decades of experience working with clients across the World. Proficient in an array of technologies, including Node.js, React.js, Express.js, Three.js, Java, Spring Framework, Hibernate, C#, .NET, ASP.NET core, Docker and NGINX and AWS services, he possesses a versatile skill set essential for tackling diverse software challenges. He remains abreast of multiple development stacks, technologies, and paradigms.

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Darko Štriga

Freelance OpenZeppelin Developer
CroatiaToptal Member Since June 24, 2022

Darko is a product tech lead, senior software engineer, and back-end developer with 12 years of experience in research and development. He worked on data-intensive applications and services in the sports industry and led end-to-end engineering execution, including back end, iOS, and Android. He holds a PhD in computer science in social network analysis in data science.

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Roman Semko Androsenko

Freelance OpenZeppelin Developer
GermanyToptal Member Since May 5, 2020

Roman has over a decade of experience excelling as a web, blockchain, and mobile developer. With a solid financial background and 20+ years of excellence in IT, he brings a unique blend of skills to clients, especially in the B2B domain. He won Samsung's mobile development challenge and has seen his apps used by millions. Roman founded two successful startups and has played a crucial role as CTO and solutions architect in several projects.

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Éric Lamontagne

Freelance OpenZeppelin Developer
CanadaToptal Member Since August 2, 2022

Éric has 23 years of software development experience since obtaining his bachelor's degree in software engineering. He has created a software development consultancy, founded a startup, and published mobile apps in Apple's App Store. He is certified in blockchain and is a Microsoft Certified Solution Developer (MCSD). Éric has worked with organizations of all sizes, from successful startups to corporations in the transportation, media, energy, aeronautics, insurance, and financial sectors.

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Lukas Klinzing

Freelance OpenZeppelin Developer
AustriaToptal Member Since March 10, 2022

Lukas is an accomplished full-stack engineer with 16 years of experience developing applications and scalable infrastructures for global startups and big enterprise corporations. His primary focus is on creating exceptional UI-heavy web applications and AI-based software. Lukas has a profound understanding of business requirements and can adeptly turn them into user-friendly solutions. He is committed to continuous self-improvement and supporting colleagues in reaching their full potential.

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Kaustav Chakraborty

Freelance OpenZeppelin 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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Matías Schapiro

Freelance OpenZeppelin Developer
ArgentinaToptal Member Since February 17, 2015

Matías has been programming as a hobby since he was six years old. He started with GW Basic and Quick Basic in the eighties and has used a lot of technologies since then. Now, he focuses on C#. After finishing his master's degree in finance, he has tackled many projects related to capital markets and quantitative algorithms. Matías loves software and finance and would be an excellent candidate for this kind of project.

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Adrià Pérez

Freelance OpenZeppelin Developer
SpainToptal Member Since June 28, 2021

Adrià is a back-end developer focused on modern PHP and Python. He's worked on fintech and big data projects and developed NL and AI solutions. He believes that maintainability, scalability, and performance should always be the guidelines to follow when designing and creating products.

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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
Creating an app for the game
Conor Kenney
Creating an app for the game
Leading a digital transformation
Elmar Platzer
Leading a digital transformation
Building a cross-platform app to be used worldwide
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Drilling into real-time data creates an industry game changer
Drilling into real-time data creates an industry game changer
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 OpenZeppelin 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 OpenZeppelin developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

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

FAQs

  • How are Toptal OpenZeppelin developers different?

    At Toptal, we thoroughly screen our OpenZeppelin 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 OpenZeppelin developers in less than 48 hours through Toptal?

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

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

    We make sure that each engagement between you and your OpenZeppelin 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 OpenZeppelin Developers Are in High Demand.

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