Hire Top Freelance Blockchain developers with Ultragenius

Ultragenius is a marketplace for top software developers, engineers, programmers, coders, architects, and consultants. Top start-ups and companies choose developers from Ultragenius platform for their critical software projects. Hire from Ultragenius network & scale your engineering team in a matter of few days. 

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Hire only the top 1% among the 20K+ engineers who have applied to Ultragenius

Rishabh

Freelance Blockchain Developer

Rishabh is a software engineer having 7+ years of experience in developing, monitoring, and testing the Blockchain applications and also have knowledge of Javascript.

Expert in

Node.js

Blockchain

CSS

HTML

Experience

10 Years

Availability

Full Time

Mahesh

Freelance Truffle Developer

Mahesh is a software engineer having 3+ years of experience in researching, analyzing, and designing blockchain protocols, networks, and decentralized applications.

Expert in

Javascript

Blockchain

CSS

HTML

Experience

10 Years

Availability

Full Time

John

Freelance Truffle Developer

John is a software engineer having 10+ years of experience developing Blockchain applications, designing network's architecture, and documenting artifacts and best practices.

Expert in

Express

Javascript

CSS

HTML

Experience

10 Years

Availability

Full Time

Hire top talented freelance Truffle developers with Ultragenius

Blockchain is a decentralized and distributed digital ledger which consists of blocks that stores transactions across multiple computers so that a record in one block cannot be changed retroactively without changing the subsequent records in other blocks.

What Ultragenius offers?

Hire freelance Truffle developers through Ultragenius in 4 easy steps

01
Tell us the skills you need

We’ll schedule a call and understand your requirements.

02
We find the best talent for you

Get the list of pre-vetted candidates in days.

03
Schedule the interviews

We will arrange a call after understanding your requirements.

04
Begin your trial

Start working with Ultragenius with a 1-week trial period.

Our Happy Clients!

Ultragenius offers a great opportunity to work in mission-driven U.S. companies with a great salary. I am glad that I chose Ultragenius to find my dream job.
Jason Martin
Blockchain Freelancer
Once you are part of Ultragenius, you don't have to look for another platform which leads you to your dream job. Ultragenius's vetting tests and assessments are unmatchable and helped me a land an excellent job.
Barbara Smith
Freelance Truffle Developer
I will thank to Ultragenius wholeheartedly. It helped me securing a career-growing high paid job which I couldn't think would be possible for me without this top connecting network.
Mark Sommers
Freelance Truffle Developer

Join 200+ Fast-scaling Start ups
and Fortune 500 Companies that have hired freelance Truffle developers

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Want to hire freelance Truffle developers on your own? Here are the skills you must look for while hiring a freelance Blockchain developer

Hiring freelance Truffle developers might be an intricate task for you if you are a non-technical manager. Today, Blockchain is one of the prominent demanding skills which verifies and traces multi-steps transactions. But,  hiring the most skilled freelance Truffle developers among thousands of Blockchain freelancers is a challenging task for anyone. So, Ultragenius is here to assist you while recruiting the top talented freelance Truffle developers on your own. Ultragenius understands your job requirements and gets you only the best freelance truffle developers.  

The following skills you must look for while hiring a freelance Blockchain developer –¬†

Steadfast knowledge of HTML and CSS

HTML (Hypertext Markup Language) and CSS (Cascading Style Sheets) are the two core technologies used to design a web page. You must hire such a developer who has practiced and worked deeply with these technologies. Knowledge of Flexbox and CSS Grid, in addition to Bootstrap, Semantic and Structural Styling, and Foundation is a must to a freelance Blockchain developer. Along with this, the developer should be well-versed in Javascript libraries especially jQuery and CSS grid systems. 

Javascript fundamentals + ES6

ECMAScript 6 (or ES6) is the current version of ECMAScript and is widely used by developers up to a large extent. Many new features including –¬†

  • Arrow functions
  • Blocked scope constructors let and const
  • Advanced object literals
  • Template literals
  • Multi-line strings
  • Modules
  • Module loaders
  • Binary and octal literals
  • Reflect API
  • Proxies
  • Classes
  • Destructuring assignment

 

CSS Pre-processors and Frameworks

A CSS pre-processor is a program that extends the functionality of CSS and compiles it into regular CSS. SASS, Post CSS, SCSS, and LESS are the extensions of regular CSS and developers use them for useful functions such as math functions, color manipulation, to write better inline documentation, to easily integrate CSS tools and CSS codebase, and much more. It saves the time of a freelance Truffle developer in web application development because of its in-built functionalities.

You must check the freelance Blockchain developer ’s knowledge of Bootstrap and Material UI, as these components enable easier and faster web development.

Strong knowledge of Data Structures

The complete Blockchain network comprises of data structures. Each block in Blockchain can be assumed as a data structure which groups/clusters similar transactions for the public ledger. The freelance Truffle developers must be familiar with several data structures like Merkle trees, Patricia trees, Hash trees, Graphs, and Heaps.

Experienced in working with Version Control System (VCS)

Freelance Truffle developers must have a very good knowledge of version control systems, like Git, SVN, TFS, and Mercurial. Mostly, developers use Git for their work. It is the version control system that helps the team in collaborating and organizing your code, maintain the frequent changes that occur in the code. Git helps in reviewing the old codes and compares them with the newly updated code, pulling the code from their repository, and managing the commit history.

Along with this, the freelance Truffle developer must know how to use add, push, pull, and commit commands. Alongwith this, the Blockchain freelancers must also know about branching and merging code as it allows developers to work independently on the same code.

Excellent understanding of testing frameworks and tools

Rising quick-deployment needs during the development phase, testing has become an important skill for freelance Blockchain developers. Therefore, developers should know about Jest, Enzyme, Mocha, Chai, AVA, and Tape for unit testing.

For end-to-end testing, they must know about Selenium, Webdriver, Cucumber.js, Nightwatch.js, Cypress, and Puppeteer.

For integration testing, they must know about Karma.

Smart Contracts

Smart Contracts are collections of programs that automatically tend to execute, control , and document an agreement when pre-determined conditions are met, so that all participants can predict the outcome without involving any intermediary . The objective of smart contracts is to reduce the –¬†

  • Enforcement and arbitrations costs.
  • Need of trusted intermediators.
  • Malevolent and accidental exceptions.
  • Fraud losses.
Knowledge of Front-end frameworks and libraries

Familiarity with at least one of the front-end frameworks is a must for any freelance Truffle developer like React.js or Angular.js. These front-end frameworks are most demanding in web development today. React is popular for its faster development of Single Page Applications and reduced refresh time, while Angular uses interpolation, dependency injection, and eliminates coding mistakes by using the strongly typed Typescript that resolves many challenges faced by the developers.

Familiarity with Cryptography

Knowledge of Cryptography is very much required to provide a secure Blockchain development environment. Blockchain freelancers must possess strong foundation in the concepts of Cryptography, including digital signatures, digital certificates, public and private keys, RSA algorithm, wallets, etc. Developers should know how to prevent unauthorized access of data using public-key cryptography.  The freelance Truffle developers should also know the difference between Keccak Р256 and SHA Р256. 

Knowledge of various programming languages

Blockchain developers must be familiar with various programming languages including РJava, C++, Python, Javascript, etc., depending on the platform on which Blockchain applications are developed. The freelance Truffle developers must have strong knowledge of Object-Oriented Programming and must know about core programming libraries, packages, and frameworks.

Blockchain Architecture

A blockchain is comprised of blocks, each block containing transactional data unit. The blocks are kept chronologically and connected together by hash functions, as hashing functions makes it very difficult to alter the blocks’ data once it is added to the chain which makes the blockchain system highly secure and immutable.

Experience with web markup and UI, UX Concepts

The Blockchain freelancer must have a firm understanding of element positioning, displaying the elements, and making components interactive, semantic markup, and other related UX Concepts so they can design the product with the best quality. The developer must be experienced in developing visual effects in presentational markup. For, example РHow the heading appears, making text larger and putting weight to it, giving which color to it, and which markup can include captions, bind columns, and row headings to table cells. 

jQuery

jQuery sits on the top of Javascript and is the most used library in web development. Blockchain freelancers must know about the jQuery functions. It simplifies HTML document traversing and manipulation, event handling,  CSS animation, and Asynchronous Javascript and XML (AJAX) interactions for rapid application development.

Proficient in writing optimized and readable code

You must hire the freelance Truffle developers based on their ability to write clean and optimized code that is understandable by all the team members, and is scalable.

Pay only after one week trial period

Connect with the top 1% freelance Truffle developers of the world at the lowest prices

Blockchain technology has extended its roots far beyond the cryptocurrency. and entered a variety of industries. The demand of freelance Truffle developers is increasing for building blockchain networks and applications. But, recruiting the best freelance Blockchain developers is not an easy task when a large no. of  Blockchain freelancers are competing to grab the job opportunities. 

Top Interview Questions to ask while hiring a freelance Blockchain developer

Blockchain is decentralized, distributed, and public ledger that contains multiple transactions which are accessible across a network and every time when a new transaction takes place in the chain, the record is added to every peer's ledger.

  • Distributed Digitalized Ledger - Each participant of Blockchain can access the complete database along with the changes made to it. It is not allowed for a single participant to regulate the information. Every participant can automatically predict the outcome of an event without the need for any intermediary. The Blockchain database is decentralized, i.e., distributed among multiple participants hence known as Distributed Ledger Technology (DLT).
  • Computational Logic - Transactions in Blockchain are programmed with computational logic. Hence, participants can set up the algorithms that will automatically invoke the transactions between the nodes.
  • Immutability of Records - Once the transaction is inserted in the database and the accounts are updated in a record, that record cannot be changed because each record is connected to the previously come records. Several data structures and algorithms are used to ensure the immutability of records, chronological ordering, and availability to all other networking nodes.
  • Node-to-Node Transmission - In Blockchain, the transmission of information takes place straight-forwardly between peers instead of a centralized node. Each user/node stores the information and forwards it to all other participants in the network.
  • Transparency along with Pseudonymity - A transaction and its information are visible and accessible to anyone within the blockchain system. The transaction takes place between blockchain addresses and each node has a unique 30 plus alpha-numeric characters address associated with it. Participants can choose to be anonymous or provide their identity to other participants in the network.

Encryption is a way of securing data that encodes the data with some information before broadcasting it over a network. The encrypted information is converted into ciphertext and only the authorized peers are allowed to decipher the information and receive the plain text. Blockchain technology is based on decentralization, cryptography, and consensus. Blockchain networks are classified based on -

  • Eligibility to participate -¬†
    • Public Blockchains - Public Blockchains allow any person to join and validate transactions.
  • Private Blockchains - Private Blockchains are limited to grouped networking and only allow known members to access and maintain the transaction ledger.
  • Decentralization and Distribution -¬†
  • Permissioned Blockchains - Permissioned Blockchains have restrictions and guarantees access only to a limited number of users who have verified their identity.
  • Permissionless Blockchains - Permissionless Blockchains have no restrictions on users‚Äô access.

 

A Blockchain ledger is a computer file that keeps a permanent record of all the transactions that have been acted upon by two parties in a distributed network. There are three types of ledgers in Blockchain technology, namely, 

  • Distributed Network

In a distributed network, the process is shared with all the peers in the network but the decision may be centralized or decentralized.

  • Centralized Network

In a centralized network, one entity governs the decision.

  • Decentralized Network

In a decentralized network, the decision is not made just by one entity rather the control is shared among several independent entities.

Although, there is no restriction to keep a record of specific type in Blockchain, following are the records kept in the Blockchain - 

  • Medical Transactions Record.
  • Business Transactions Record.
  • Identity Management Record.
  • Record of Management Activities
  • Documentation

The Blockchain ecosystem is built upon four components - 

  • Node application
  • Shared ledger
  • Consensus algorithm
  • Virtual Machine
  • Node application - Each node in the network has to install a computer application specific to the ecosystem in which they have to participate. For example, if the ecosystem is Bitcoin, each computer should run the Bitcoin wallet application.
  • Shared ledger - A shared or distributed ledger is a data structure handled inside the node application. When you run a node application, you can view its blockchain contents (its respective shared ledger) for that particular ecosystem. For example, while running a Bitcoin client, you can choose to participate in the Bitcoin ecosystem according to the predefined rules in the Blockchain ecosystem.
  • Consensus algorithm - The consensus algorithm sets the rules for how the Blockchain ecosystem will come to a single view of the ledger. For example, Bitcoin comes to the consensus of the ledger in a few minutes.
  • Virtual Machine - A virtual machine is an abstract logical component designed by a computer program operating with pre-defined instructions in a specific language. For example, when you press a button on the screen, a specific event or functionality is triggered and shows you the specific information irrespective of its process.

A Coinbase transaction is the first transaction that takes place in a block. It is a special type of transaction which can only be created by a miner. It is no inout transaction and collects the block rewards for the miners.  When a miner collects any other transaction fees, it is sent to the coinbase transaction.

Merkle trees are mathematical data structures comprised of hash blocks of different types of data, also referred to as binary hash trees.  These hash trees encodes the blockchain information in a secure and efficient way. Merkle trees enables very fast verification of transaction data and also provides rapid data transfer from one computer node to another in the blockchain network.

Proof-of-Work (PoW) algorithm confirms the transaction and creates a new block in the Blockchain network. In the PoW algorithm, miners compete with each other to complete their transactions on the network. This is called Mining. The first miner who solves the blocks problems earns a reward. 

 

In Proof-of-Stake (PoS) algorithm, a set of nodes stake their cryptocurrencies for the transaction validation. The creator of a new block is selected in a deterministic manner depending on its wealth. PoS doesn’t give any block reward, hence miners take the transaction fees only. Proof-of-Stake can be more cost-effective as compared to Proof-of-Work.

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Frequently Asked Questions

Ultragenius is one of the leading platforms for hiring remote talent and connecting freelance and part-time developers with Silicon Valley businesses. We focus on finding the best talents who will perform extremely well and will be easily integrated into your teams. We filter out only the top 1% most skilled freelance developers among the 20K+ developers who have applied on our platform. Candidates have to prove their self-reported experience by giving Ultragenius’ s skill tests.

Ultragenius first tests the developer’s skill set by conducting a two and half hour hiring test. Our hiring test judges a candidate on all aspects like aptitude, case study analysis, verbal and reasoning, coding questions based on data structures and algorithms, software engineering, system design, and more. Then, there is another round for the candidates who are selected from this round called “Higher-level Assessment Skill Test‚ÄĚ, which is a video round that deeply analyzes freelance developers‚Äô major skills and asks questions about the projects they have worked upon.

Fill up the form which is on every hiring freelancers’ page and we will inform you once we select the top 1% freelance Truffle developers matching your job requirements.  After analyzing the candidates based on their resumes and two assessment tests, we provide you the feedback quickly. And if the freelancers selected by our team are fit for your job role, then we also provide the onboarding.

Ultragenius offers you only the most skilled freelance developers who are top 1% among the 20K+ freelance developers who have applied on our platform. After a rigorous selection and testing process, we sort out only the top candidates for you. You can check out Ultragenius’ s selection process for hiring freelance Truffle¬† developers on¬†https://www.ultragenius.com/hire-blockchain-freelancer.

Ultragenius provides you the best facility to hire freelancers in more than 50 skills like React, Angular, Javascript, Node, Java, Python, Magento, Ruby On Rails, Golang, PHP, WordPress, .NET, Android, iOS, DevOps, Machine Learning, and many more.




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