Blockchain Developer – Global Payment Processor

Contractor Full-Time Blockgram
United states

Blockgram currently seeks a Blockchain Developer to join the clients team for a 6-12+ month initial contract, preferably onsite, in South Portland, Maine (US-ME), United States (US).

Our client, a large worldwide payment processing, and information management service company, is searching for a Blockchain Developer with expertise in the Hyperledger development platform.


  • Design and build industry-specific solutions using Blockchain and Hyperledger technology
  • Lead and contribute to Blockchain infrastructure setup and solution development in Hyperledger, and potentially Ethereum, cryptocurrencies and smart contracts.
  • Understand functional requirements as applicable to payment processing industry and convert into system and user specifications for development.
  • Define development approach, best practices to implement the solutions, and document all development frameworks and design artifacts.
  • Mentor team members, review source code and provide technical guidance as needed.


  • 3-5+ years of hands-on experience in Java, C#, Goland, or Python. Strong proficiency in NodeJS, GIT repositories or similar source code management systems, can be either open source or closed source tools.
  • 3+ years’ experience in application development and systems implementation.
  • 1+ year direct experience in Blockchain design, build, test, and deployment; either individually or part of a solution development team using distributed applications frameworks such as Multichain, Meteor etc…
  • Formal understanding of Blockchain technology, how to develop decentralized applications, cryptocurrencies, and experience with multiple consensus protocols e.g. Proof-of-work (PoW), Proof-of-stake (PoS).
  • Direct experience in development on the Hyperledger Blockchain platform, and preferably (but not required) another prominent environment, such as: Ethereum, R3, Corda, Rubix, Blumix, etc…
  • Good understanding of information security protocols, such as cryptography, symmetric/asymmetric (public/private key, encryption signatures), peer to peer networks, hash functions, etc…
  • Experience with multiple SDLC methodologies, including Agile and Continuously Iterative models.
  • Good understanding of Microservices architecture and potentially decentralized storage solutions.
  • Experience leading technical discussions, scoping decisions, and recommend best practices.
  • Contribution to open source projects on Blockchain/cryptocurrencies.

This position is only available to those interested in contract employment opportunities with Blockgram, supporting their clients’ needs. Please note, 1099 or corp-2-corp contractors or the equivalent will be considered.

Ref #: 44421

Required skills

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