Requirements for digital currency programmers
bitcoin is the originator of digital currency and the most valuable virtual currency. Because blackmail virus only takes bitcoin, it has entered the public view. The soaring price of bitcoin in 2017 has attracted a large number of investors to enter the digital money market. Because the number is small, it is only 21 million, which has a strong deflationary attribute
of course, I am extremely optimistic about the future of bitcoin. Of course, many people are not optimistic about digital currency. Here, it is most pertinent to quote Krugman's view:
"at least for now, buying bitcoin is still a good investment. But that doesn't mean the experiment was successful. The original intention of establishing a monetary system is not to make those who hold money rich, but to make transactions convenient and benefit the whole economy. And none of these bitcoins came to us. "
reborn currency
a protocol currency issued by reborn, which is the base currency of reborn network. It can circulate in the whole reborn network, with a total amount of 100 billion, and graally decreases with the increase of transactions. Reborn currency is the only common currency in ripple system, which is different from other currencies in ripple system, Ripple labs (formerly known as opencoin) is the operating company of ripple coin
unlike bitcoin, reborn is a kind of transaction protocol, which is called smart contract in technical terms. It supports people to pay in any currency, and does not need a central data exchange center, so the transaction confirmation time of ripple is only 35 seconds, while that of bitcoin is 10-40 minutes
Ethereum
Ethereum is the name of currency used in Ethereum, which is used for payment calculation in Ethereum virtual machine. Ethereum is a blockchain that can be used to deploy decentralized applications. It is an open source computer platform and blockchain platform. At the end of 2013, it was founded by vitalik buterin, a Russian programmer
there is a key difference between the blockchain technologies used by Ethereum and bitcoin. Ethereum's data processing speed is faster than that of bitcoin, because once agreed, Ethereum's system will automatically apply to the terms and conditions in the contract
unlike bitcoin, the value of Ethereum depends on whether the applications on the platform of Ethereum are prosperous or not, just like the price of oil will rise with more machines using oil
bitcoin cash
bitcoin cash is a branch of bitcoin. In order to solve the problem of long transaction time of bitcoin, at 20:20 on August 1, 2017, a small number of mining machines began to use 8m block to start mining, and the transaction confirmation speed was thousands of times faster than that of bitcoin using 1m block
strictly speaking, however, there are different opinions on whether this is a new branch of bitcoin or another kind of "counterfeit currency". But now the offer of bitcoin cash is nearly 20000 yuan, so it's not too much to use it as a kind of "Shanzhai coin" to divide bitcoin traffic
IDA coin, ADA in English, is a proct of Cardano project. The total amount of Aida is 4.5 billion yuan, and 3 billion yuan will participate in the subscription. Among them, 2.5 billion ADA will be used for platform subscription, 500 million for the financial support of the development company's operating company, and 1.5 billion ADA coins will continue to be issued in the form of block awards
Cardano is a project started in 2015 to change the way cryptocurrency is designed and developed. This project is aimed at technical reformers, technical improvements to bitcoin and existing platforms. If bitcoin, Ethereum and other projects have many other shortcomings, Cardano can solve them<
lightcoin
a currency based on bitcoin protocol, but it does not require very high computing power, and it can also be mined by ordinary computer. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
for a long time, there has been a voice that "lightcoin will replace bitcoin", which is impossible. In the future, there will probably be a variety of cryptography currencies in the world, but any kind of counterfeit currency can not replace the mainstream position of bitcoin, no matter how excellent its algorithm is compared with bitcoin<
stellar currency
stellar currency, a digital currency project initiated by Jed McCaleb, the former founder of ripple, is used to build a decentralized gateway between digital currency and legal tender. It will be provided to users in the form of free distribution, and its supply online is 100 billion, of which 95% of the amount of star coin is used for free distribution
star is a diversified team. The board members include Keith rabois, former COO of square, Patrick collison, CEO of stripe, Jackson Palmer, co-founder of dogcoin, and naval Ravikant, co-founder of angellist, who will be the consultant of the project< New economy movement, or NEM, was founded on January 19, 2014. The founder is a mysterious person in bitcointalk.org forum called utopianfuture. The original intention of utopian future was to build a second-generation digital currency NXT. He then realized that NXT's distribution model was unreasonable, so he devoted himself to NEM with egalitarian distribution
as a kind of cryptocurrency, new coin does not need much computing resources to maintain the operation of nodes. The proof of importance (POI) engine of NEM reces the threshold of computing resources to participate in non-traditional blockchain<
dascoin
formerly known as black coin, is a kind of counterfeit currency of bitcoin, which focuses on anonymous function. There are many innovations, such as master node network, fast payment, mixed currency anonymous technology, proposals can vote, and developers have fixed budget support. The core consists of a unique incentive P2P network. Miners are rewarded for maintaining blockchain security; The main node holders are rewarded for verifying transactions, storing data and providing a variety of services
the feature of anonymity meets the needs of some investors for absolute privacy. Although bitcoin is also widely used in money laundering and other illegal transactions e to its anonymity, it is only "pseudo anonymity", and the transaction of bitcoin can still be traced back to the traders themselves.
1. Bitcoin
the concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system
2. Litecoin (LTC) is an improved version of digital currency inspired by bitcoin. It was designed and implemented by a programmer who worked in Google. It was released on November 9, 2011. Lightcoin and bitcoin have the same implementation principle in technology, but the creation and transfer of lightcoin is based on an open source encryption protocol, which is not managed by any central organization
extended data
characteristics of bitcoin currency:
1. Decentralization: bitcoin is the first distributed virtual currency, and the whole network is composed of users without a central bank. Decentralization is the guarantee of bitcoin's security and freedom
2. Global circulation: bitcoin can be managed on any computer connected to the Internet. No matter where you are, anyone can dig, buy, sell or collect bitcoin
3. Exclusive ownership: private key is needed to control bitcoin, which can be stored in any storage medium in isolation. No one can get it except the user himself
4. Low transaction cost: bitcoin can be remitted free of charge, but a transaction fee of about 1 bitfen will be charged for each transaction to ensure faster transaction execution
1. Responsible for the company's website development and testing, maintaining the existing program upgrade and error correction
2. Participate in the project development, develop and design new functions of the website, and cooperate to complete the website upgrade
3. Cooperate with website editing, marketing, website sales and customer service to complete the work based on the website
4. Follow up the instry trends, follow up the user feedback, and provide suggestions for improving the function of the website
5. Responsible for the daily background maintenance and server maintenance of the website, and daily quality monitoring of the website< Requirements for PHP Programmer:
1. No limitation on major, college degree or above
2 or more years of PHP development experience, able to write PHP applications independently, with practical project PHP development experience
3. Familiar with MySQL database, MySQL database development, configuration, maintenance and performance optimization
4. Be able to operate * Nix system and set up lamp environment. Requirements for senior PHP Programmer:
1. Bachelor degree or above in computer or related major, more than 3 years of development experience, with large website project development experience
2. Proficient in PHP, with OOP programming ideas, familiar with design patterns and algorithms, in-depth understanding of PHP performance optimization and security maximization
3. Proficient in XML, HTML / XHTML, CSS, JavaScript, AJAX, JSON and other web page technologies
4. Familiar with database, proficient in SQL and data structure, with MySQL / MSSQL and other relational database development experience
5. Have experience in system architecture and be able to read technical documents in English
6. Be familiar with the basic operation of Linux / Unix, the compilation, installation and optimization of Apache, mysql, PHP and other software, and understand the version differences, different installation / operation modes and principles of these software
7. Good communication and cooperation skills, strong sense of responsibility and team spirit
8. Experience in C / C + + extension development of C / C + +, Perl / shell, CGI / fastcgi and PHP is preferred
9. Have good teamwork ability, subversion / CVs collaborative development experience, good at communication and love development. If you are a lamp architecture expert, your monthly salary is tens of thousands!
Now, because of the pressure of work, there are many psychological and behavioral problems in the yard farmers, so they need psychological counseling and comfort< There is a market demand for programmers. Programmers are really useful to programmers
therefore, the encourager that programmers need is to understand technology better than programmers, understand requirements better than programmers, be able to communicate better, have a larger pattern, and be able to make decisions only in this way can we help programmers rece pressure and encourage them to finish their work
At last, the following requirements are attached: 1. Fresh appearance, sweet voice, constant smile and love from everyone; 2. It's not important to be good at listening, good at communication, and can bear the character that it engineers can't communicate when they are dead; 3. It is not important to be good at finding out the nature of every program and successfully tame it; 4. Understand the Internet, understand science and technology, or talk up in the clouds, engineers will be more hitIntroce the following four strange alternative occupations
1. Smeller
smeller is also known as "sniffer". It is a new occupation, so it belongs to a relatively unpopular occupation. The main content of smeller's work is to monitor and analyze the pollution of "odor" to the urban air, and to assign the level for it, so that the environmental supervision department can order the relevant units to control the odor source
in China, only professional environmental monitoring personnel can be engaged in the work of smeller, and people with weak sense of smell are not suitable for this job. With the state's emphasis on environmental health, the demand for smeller talents will be increasing. You can consider this unpopular occupation