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Sameep Singhania

Sameep Singhania

New Delhi, Delhi, India
Member since July 3, 2017
Sameep has bachelor's degree in computer science and has been programming for the past five years. He would characterize himself as a Blockchain engineer and consultant who loves traveling. That's why the idea of joining Toptal thrills him, freelancing would enable him to work on exciting development projects while seeing the wonders of the world, That is an opportunity that he can't pass up.
Sameep is now available for hire
Portfolio
Experience
  • Agile Software Development, 2 years
  • Blockchain, 1 year
  • Ethereum, 1 year
  • Solidity, 1 year
  • Web3.js, 1 year
  • Truffle, 1 year
New Delhi, Delhi, India
Availability
Part-time
Preferred Environment
Ubuntu, CentOS, GitHub, Bitbucket, VS Studio
The most amazing...
...hing I've made was an appointment-&-EHR management system on blockchain for a healthcare entity; I did it all—the design, development, testing, and deployment.
Employment
  • Blockchain Developer
    2018 - PRESENT
    OpenBazaar (via Toptal)
    • Integrated Ethereum-based payments (Ether and ERC20 tokens) in OpenBazaar.
    • Worked as part of the team in charge of updating wallet interface to support Ethereum in OpenBazaar.
    • Developed the infrastructure for OpenBazaar smart contracts.
    • Built a smart contract which included tokens, direct payments, escrowed payments, rewards, jury pools, and more.
    • Implemented the daily sync-up calls with other team members.
    Technologies: Ethereum, Solidity, Go
  • Blockchain Developer
    2017 - PRESENT
    Freelance
    • Built ERC20 tokens for multiple clients.
    • Developed crowdsales for multiple clients.
    • Created a green chain application.
    • Designed and developed a healthcare solution on Blockchain.
    • Designers the blockchain architecture for Stagewood, Inc.
    • Organized meetups.
    • Spoke about blockchain at various universities.
    Technologies: Ethereum, Solidity, Web3.js, Hyperledger Fabric
  • Smart Contract Developer
    2018 - 2018
    Deep Aero
    • Developed an ERC20 token.
    • Built a Crowdsales contract with five tiers including pre-sales.
    • Developed a token vesting contract.
    • Made recommendations to the client concerning the latest security practices when creating front-end apps.
    • Deployed smart contracts.
    Technologies: Ethereum, Solidity
  • Ethereum Smart Contract Consultant
    2018 - 2018
    Intellix (via Toptal)
    • Aided in the build of state channels.
    • Infested and comprehended a previously written smart contract for the above state channels.
    • Facilitated a client’s understanding of how the application works.
    • Devised a strategy for the team to work simultaneously on the smart contracts.
    • Set up a private network for the development and testing purposes.
    • Was involved in Skype calls with clients.
    Technologies: Ethereum, Solidity, Web3.js
  • Blockchain Consultant
    2018 - 2018
    Stagewood, Inc. (via Toptal)
    • Built a Blockchain solution for the entertainment industry.
    • Helped the client to choose which blockchain platform to use as per the use case.
    • Designed the system architecture as to work with a Fabric design.
    • Set up Hyperledger-Fabric nodes.
    • Worked on an interactive ICO.
    • Involved in every othe day recurring meetings with client.
    Technologies: Ethereum, Hyperledger Fabric
  • Blockchain Developer
    2018 - 2018
    Akila Labs (via Toptal)
    • Designed and developed an Ethereum-based system for managing EHRs. The system consists of developing a private network on top of an Ethereum blockchain.
    • Built the entire system's architecture from blockchain to the front-end.
    • Read a MIT researcher's paper on MedRec.
    • Developed a smart contract architecture for the system.
    • Modularized a smart contract design.
    • Launched an Ethereum-based private network running on POA consensus algorithm (Clique).
    • Developed smart contracts for the system.
    • Created a test case for the smart contract.
    • Worked under Agile setting.
    • Was involved in daily scrum meetings.
    • Led a team to integrate Blockchain-based smart contracts with other parts of the application.
    • Provided a few recommendations for the system which was very much appreciated.
    Technologies: Ethereum, Solidity, Web3.js
  • Software Developer
    2015 - 2017
    Drishti-Soft Solutions
    • Developed an omni-platform to help customer service desks to resolve customer's queries from various social media and traditional SMS and calls; all the platforms from one single product.
    • Organized technical training sessions related to web development.
    • Worked as part of the core technical team that developed the core tech stack.
    • Created a framework which allows third-party vendors to create apps on top of our product.
    • Designed and created a library similar to Redux on top of GWT. Was awarded the Boundary Breaker award for the same.
    Technologies: Java, GWT, OSGi, HTML, CSS, PostgreSQL, Hibernate
  • Service IT Developer
    2013 - 2014
    Dell International Services
    • Worked as part of the Skype test execution team.
    • Executed test cases and reported bugs.
    • Tested the Skype application on a varied range of devices and platforms.
    • Created a project for the team which allowed the team to keep all project-related documents in one single location. The documents were password protected and provided access depending upon the access level of the user.
    Technologies: Manual Testing, Test Execution
Experience
  • NovoPlexus (Development)

    NovoPlexus is building a Blockchain-driven, patient-centered healthcare marketplace. This marketplace will be based in the US—the New York Metropolitan area specifically. The idea is to develop the core platform and the supporting app layer that can be rapidly built and test in an iterative fashion.

  • Stagewood, Inc. (Development)

    A platform devoted to bringing innovative Blockchain technology and smart contract applications to the entertainment industry. It is the ground floor for a worldwide community working under virtual and physical platforms that directly connect fans, performers, and producers—streamlining the delivery of entertainment.

  • Million Ethereum Platform (Development)

    I developed a million dollar product. It allows users to put advertisements for their ICOs on an Ethereum blockchain. The user can buy the ad space on the canvas and display their ICO information. The ads are actually stored on the blockchain and displayed on the canvas using Web3.js.

  • Antriex ICO (Development)
    http://antriex.com

    I developed entire ICO smart contracts for an upcoming exchange ANTRIEX.
    The smart contracts include:
    1. ERC20 token
    2. Private sale
    3. Angle Investor Vesting Contract
    4. Public Sale
    5. Founder vesting contract

  • Entire Crowdsales DApp (End to End) (Development)
    https://salty-woodland-20872.herokuapp.com/app.js

    I developed and an entire DApp (a decentralized app) for the crowd sales for my client. It includes an ERC20 token contract, a crowdsale contract, and the DApp which allows the user to purchase those tokens during crowd sales.

  • ERC20 Token for KOAN ICO (Development)

    I developed an ERC20 token as per KOAN specifications. I also consulted on how to proceed ahead with the ICO.

  • Smart Contract Audit (Development)
    https://github.com/sameepsi/Audits/blob/master/ParsecPresale_V2.md

    I audited the smart contract for the Parsec team. The code contained many vulnerabilities. I marked them all and created a report for the same. The client was very happy with the results.

  • Smart Contract Code Auditing for the VTOS Team (Development)
    https://github.com/sameepsi/Audits/blob/master/VTOSToken.md

    I audited an ICO smart contract for the VTOS team. The code contained many severe vulnerabilities. I then created a report and suggested possible solutions for the vulnerabilities. The client was very much happy with the results and added me to the team as a consultant.

  • Incidents Dashboard (Development)

    I developed this project for a security company called Cybellum. It's a very user-friendly dashboard that allows users to view all the incidents found based on various parameters. Behind the scenes, it involves some complex APIs, data manipulation, and pagination.

  • Incidents Reports Management System (Development)

    In this project, the main task was to design a system around their current architecture to enable them to view reports about all the reported incidents based on categories. It also enables the user of the system to view and edit various parameters of the incident.

    Technologies: Node.js, Express.js, MongoDB, HTML, CSS, JavaScript

  • Chat Application | Chatty (Other amazing things)

    This is a simple chat application which allows a user to create rooms, join existing rooms, and chat within the room. It does not require any registration and users can join and leave at any time. It also supports file uploading and emoticons.

    Technologies: Node.js, Express.js, Socket.IO, Amazon S3, HTML, CSS, JavaScript

  • Internal Respository (Other amazing things)

    This is a web-based portal that allows team members to share files among themselves. It allows users to upload and download files. It supports folder hierarchy and the folders can be created or deleted. The portal also has proper authentication and authorization mechanisms in place.

    Technologies: JEE, Struts, Apache Tomcat, HTML, CSS, JavaScript

Skills
  • Languages
    Solidity, JavaScript, Java, CSS, HTML
  • Frameworks
    Truffle, GWT, Express.js, Hibernate, OSGi
  • Libraries/APIs
    Web3.js, Node.js, REST API, Socket.IO
  • Tools
    Remix IDE, Apache Tomcat, Dapper
  • Platforms
    Ethereum, Ubuntu, Blockchain, JEE, Hyperledger Fabric
  • Other
    ERC20, Smart Contracts, Ethereum Smart Contracts, Distributed Applications, ICO
  • Paradigms
    Agile Software Development
  • Storage
    MongoDB, AWS S3
Education
  • Bachelor of Technology degree in Computer Science
    2009 - 2013
    JSS Academy of Technical Education (UPTU) - Noida, India
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