Blockchain C++ Programmer

For $50 — Ends 27 Feb 2018 (in 5 months)

General information for the business: Technology Firm
Kind of development: Customization of existing program
Description of requirements/functionality: We are currently working on a blockchain app. Need a C++ coder with good understanding of blockchain programming. Job involves modifying and adding to existing code. Job can be done remotely but one face to face meeting would be good. This contract pays £50 per hour. Must be based in the UK. Please provide examples of RELEVANT work, and prove your understanding of blockchain technology.
Please answer these 3 questions with submission:
1)Explain in 1 sentence, in simple terms, what the blockchain does within a cryptocurrency ecosystem.
2)What is a theoretical solution to the blockchain scalability issues (slow transactions, higher fees etc)
3)What is proof of stake?
OS requirements: Windows, Linux
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