Delivering experts for interview, any level, any sector, any market, immediate access

“A world-class Expert Network.”

Jeremy Baker, BBC Commentator, Affiliate Professor ESCP Europe

Critical Future Global® Blockchain Development Services

Custom Development

Whether through the creation of decentralized applications or support of a private blockchain, Toptal’s experienced blockchain developers help clients take advantage of the numerous opportunities that the emerging technology has to offer.

Blockchain Security

Blockchain provides alternative options for digital security, using familiar cryptography but with unchangeable data. Work with Toptal developers to understand how your company can use blockchain as a means to secure data and enhance the trust verification processes.

Smart Contracts

Smart contracts are programmed contracts that utilize execution in a distributed environment for enforceability. These can variously be used to support crowdfunding, blind auctions, multi-signature wallets, and more.


Companies are turning to Ethereum, a blockchain-based platform, for broader applications of trust verification beyond just cryptocurrency including smart contracts (powered by the programming language Solidity).


The most popular cryptocurrency in the world, Bitcoin was also the first distributed blockchain. Toptal developers have experience with Bitcoin Core, the underlying reference client for the currency, as well as with the digital currency itself.


Created by the Linux Foundation, Hyperledger is a project of open-source blockchains and related tools. Toptal Hyperledger developers have experience in Hyperledger blockchain platforms like Fabric and Sawtooth, and tools such as Cello.

How Critical Future Global® Works

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.
Work with Hand-Selected Talent
Within days, we’ll introduce you to the right talent for your project. Average time to match is under 24 hours.
The Right Fit, Guaranteed
Work with your new team member for a trial period (pay only if satisfied), ensuring they’re the right fit before starting the engagement.


Is there anyone in the world you like to question? We deliver an expert interview service, which gives you access to the people who with the information you need. There is no one too senior, or too remote, or too difficult to reach. We can give you access to anyone.

Our Expert Network service is used by leading consultancies, banks, private equity, and industry players. .

We work with many of the world's leading companies including Siemens, Unilever, Fedex, Arcadia Group, Royal Mail, Aviva etc.

Key Benefits
  • Identify the best experts market
  • Rigorous selection process
  • Professional account management
  • Conduct interviews on your behalf
  • Enable you to conduct interviews
  • Professional prepare experts
  • Record interviews, transcribe
  • Extremely responsive
  • Global presence
  • Experts available immediately
  • Interviews delivered within 24 hours
  • Search and select where necessary
  • Measurable ROI
  • Top 2% of expert interviews

Why Critical Future?

World Class Expert Network
Critical Future is a specialist Expert Interview provider. Uniquely our team can deliver any expert in the world for interview. We guarantee every interview, manage professionally, and get you the information you want.

“Critical Future was selected by the British government to partner on a unique event on the Future of Banking”

Expert Network Account Manager
Expert Network Account Manager