Java developer salary September 2017

United States Java developers labor market analysis, according to the results of September, 2017
05 September 2017   465

We publish the analysis of the labor market of developers in the United States monthly. For Java developers in September there were 10278 vacancies. The vacancy rates were distributed as follows.

Salary Estimate Java, September 2017
Salary Estimate Java, September 2017

The most of the developers are required in New York, the least in Seattle.

Number of vacancies in different cities, Java, September 2017
Number of vacancies in different cities, Java, September 2017

Among the companies that hire Java developers the leaders are:

  • Diverse Lynx
  • Sonsoft Inc
  • Jobspring Partners 

Number of vacancies in different companies, Java, September 2017Number of vacancies in different companies, Java, September 2017 

According to the required experience, the vacancies are distributed as follows.

Number of vacancies by experience level, Java, September 2017
Number of vacancies by experience level, Java, September 2017

The average salary and salary according to the level of experience were distributed as follows.

Аverage salary and average salary, related to work experience, Java, September 2017
Аverage salary and average salary, related to work experience, Java, September 2017

The analysis was carried out by the Hype.codes portal method using the indeed.com data

 

What is Web3j?

Small review of lightweight Java and Android library for integration with Ethereum clients
15 December 2017   831

What is webj3?

web3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with clients (nodes) on the Ethereum network:

web3j architecture
Web3j Architecture

This allows you to work with the Ethereum blockchain, without the additional overhead of having to write your own integration code for the platform.

According to the developers, these are the features:

  • Complete implementation of Ethereum's JSON-RPC client API over HTTP and IPC
  • Ethereum wallet support
  • Auto-generation of Java smart contract wrappers to create, deploy, transact with and call smart contracts from native Java code (Solidity and Truffle definition formats supported)
  • Reactive-functional API for working with filters
  • Ethereum Name Service (ENS) support
  • Support for Parity's Personal, and Geth's Personal client APIs
  • Support for Infura, so you don't have to run an Ethereum client yourself
  • Comprehensive integration tests demonstrating a number of the above scenarios
  • Command line tools
  • Android compatible
  • Support for JP Morgan's Quorum via web3j-quorum

It has five runtime dependencies:

  • RxJava for its reactive-functional API
  • OKHttp for HTTP connections
  • Jackson Core for fast JSON serialisation/deserialisation
  • Bouncy Castle (Spongy Castle on Android) for crypto
  • Jnr-unixsocket for *nix IPC (not available on Android)

It also uses JavaPoet for generating smart contract wrappers.

Lear more at GitHub.