How statistics are calculated
We count how many offers each candidate received and for what salary. For example, if a DAO/dApps developer with Node.js with a salary of $4,500 received 10 offers, then we would count him 10 times. If there were no offers, then he would not get into the statistics either.
The graph column is the total number of offers. This is not the number of vacancies, but an indicator of the level of demand. The more offers there are, the more companies try to hire such a specialist. 5k+ includes candidates with salaries >= $5,000 and < $5,500.
Median Salary Expectation – the weighted average of the market offer in the selected specialization, that is, the most frequent job offers for the selected specialization received by candidates. We do not count accepted or rejected offers.
Trending DAO/dApps tech & tools in 2024
DAO/dApps
Decentralized Autonomous Organization (DAO)
Broadly understood as defi, this new financial system which has gained extensive favor among enthusiasts, in result, has elicited a discussion on DAOs in the crypto and blockchain world. Propagators of DAO advocate that the DAO is a totally novel phenomenon which will conduct us to a decentralized world, but the questions like ‘What exactly is DAO?’ and ‘How does it function?’ should be answered.
What Is DAO?
DAO, which is a favorable name, stands for Decentralized Autonomous Organization. There are many people who gather together according to certain rules to complete what they have agreed to. On the other hand, whereas DAOs are the same other systems of the rules but exception that the rules are embedded into codes of the organization. DAOs take advantage of smart contracts, which are algorithms that are based on the attainment of specific set of parameters or criteria. The subsequent segments explain the functioning mechanism of the DAO, the setting up process of the DAO, commonly asked questions regarding DAO answered.
What is DAO and How it Works.
The DAOs function on the basis of smart contracts which, in turn, provide the underpinning basis to ensure how the DAO would function. The execution of the DAO depends on the presence of a set of smart contracts that function autonomously without necessitating any human contact. The group of community main members pools their effort to construct the smart contract. The smart contracts stand out for their transparency as well as verifiability, and they can, therefore, be audited by any interested person, giving all of those in the protocol a complete understanding of how it functions and is operated.
DAO cannot function without capital; therefore, money should bolster it. The funds are usually raised by the project or the protocol through selling tokens in exchange for money or such assets. Token holder – will cast their vote based on a set percentage of their holdings. The rules of the DAO are determined by the stakeholders while the code and transaction records of the DAO are permanent on a blockchain with complete transparency enforced.
The DAO code can now be deployed once the funding is in place. Perhaps the most eye-catching trait of DAOs is that when the codes are written and implemented, they cannot be altered and there is nobody who can change that. First, the involved changes must pass a member vote, and, in the case of reaching an agreement, these specific changes will be implemented. If there comes a need for a change, suggestions are made through proposals. It happens when the proposal gets a majority of votes by stakeholders and if the proposal is in line with some of the network consensus rules it is acted upon.
One characteristic of DAO that distinguishes them from traditional organizations is that DAOs are run on a decentralized structure. Besides, DAOs unlike conventional institutions do not have any hierarchy and they are moved more by economic mechanisms than anything else.
Unlike traditional organizations which have official contracts that bind their members to the organization, DAOs have no formal contract that binds the members to the DAO. Rather than that, the contract elements are similar and keep the members to the rules of consensus. Since the rules are formulated by the open-source software that supports the organization, they are open and public.
Key Benefits of DAO
DAO is expanding its presence in sectors like sports, arts, and finance. Interest in this technology is also evident in crowdfunding. It has various advantages that will probably induce many groups, entities, and individuals to embrace its structure that is DAO. With that information, the major benefits of DAO are as follows:
- Decentralization
- Participation
- Publicity
- Community
Pros and Cons of DAO
Decentralized Autonomous Organizations have both pros and cons, some of which have been highlighted-
Pros
- A variety of individuals can collectively come together from around the work to act as a single entity.
- More individuals have a voice in the planning, strategy, and operations of the entity.
- As votes on the blockchain are publicly-viewable, tokenholders are naturally incentivized to act more responsibly.
- Members of a DAO may feel empowered to collaborate with like-minded individuals with similar goals within a single community.
Cons
- It often takes longer for decisions to be made as there are more voting participants.
- There is often more burden to educate users as the collective voting population are diverse with varying ranges of education and knowledge.
- More time is needed to cast votes or gather users due to the decentralized nature of the entity.
- Severe exploits such as theft of treasury reserves are possible if the DAO’s security is not properly established and maintained.
What does it mean to Launch a DAO?
When launching a DAO, there are the following factors that should be taken into account. Let’s break down the steps to create a DAO in this case where the Ethereum network is used.
- Deciding the Structure of the DAO.
- Figuring Out the Type of DAO to be Built.
- DAO Token Allocation
- The role of DAO Token supply, distribution, and incentives in the Ethereum ecosystem.
- Building the DAO
- Treasury of the DAO being set up.
- Building a Community
Is DAO Effective in Real World?
In theory, DAO that meets several criteria of an ideal decentralization solution the concept also does. It has indeed changed the dynamics of how cryptocurrency landscapes operate, yet it has remained well below the level of proving its real corporate applications. After all, in a real-life corporation structure we can barely even think of completely replacing a human manager with an AI system. Although valid as a complementary support, artificial intelligence cannot substantially grasp and imply the customary activities required to address many problems.
An example of this would be that should a manufacturing site be stopped at its line of business, the smart contract would not necessarily be in a condition to decide when to resume order placements. Nevertheless, the human manager could possibly deal with small and huge issues more sharply than the machine and solve them efficiently and effectively. In addition to this AI can efficiently be embedded in systems for trust issues with transaction but would require a human being to create and maintain trust in organizations and communities.
And hence, we could use the idea that these are very complex and effective systems, yet they are not ready for practical use at all. DAOs will then go through structural modifications and the whole field should be much more advanced before they can be able to be adopted widely.
Decentralized Applications (DApps)
Decentralized Applications, or DApps, are basically smart contract apps based on the Ethereum platform, with a blockchain in the background. As any type of traditional app, users do not notice the difference, just the openness of features.
DApps are designed to provide an alternative approach when it comes to personal finance. For example, when people imagine traditional finance we mainly evoke, the process of lending, borrowing, storing, and similar players. Yet, all of these are, consciously or unconsciously, fueled by a central system of authorities, which could be banks or any other financial establishments.
However, when it comes to the development of finance as an entity, many of them rather identify cryptocurrencies and blockchain as our future. Does it mean that even simple financial operations, like credits, in the state of economic decentralization become impossible?
History of DApps
Though Bitcoin BTC is the first blockchain network, the technology has moved far beyond an acute money transfer. When Vitalik Buterin and other colleagues presented Ethereum ETH in 2013, their ambitions were not for just a transaction protocol but for a whole new decentralized order.
Buterin designed a blockchain-based internet, where users are the controllers rather than corporations. To realize that, Ethereum would have smart contracts which are more like if-then statements. Such contracts use pre-programmed rules and limitations established in their code. The implication here bypasses the intermediaries for both parties, and hence no centralized platforms are required.
This was, in fact, in 2014 the year that a report defining a DApp was released with a title “The General Theory of Decentralized Applications, Dapps,” which was authored by several individuals with vast experience of the space like David Johnston and Shawn Wilkinson.
The paper defined DApps as entities with the following characteristics:
- It is imperative that the DApp must be based on an open source programs and that it should work without anyone from the third party interfering. It has to be controlled by the users. They should be authorising a change that is automatically realised.
- All blocks in the network must contain a permanent storage archive. Decentralization is a very important concept in crypto, because a system without a centre cannot be affected by an attack.
- The access to DApps should be done using any cryptocurrency as it is used in the mining. In addition, DApps cannot pay supporters without some initial token.
- A digital “protocol must entail a consensus algorithm that creates tokens, namely, proof-of-work or proof-of-stake.
Subsequent to this, the paper groups up the Bitcoin into three categories or layers that are based on the users how they interact with the apps.
Layer1 DApps
Layer-one DApps are placed alone and have no single blockchain. It is particularly worth mentioning that the most popular dApps are of this type, such as Bitcoin, for example. They are required by a consensus algorithm and the security rules itself.
DApps on layer2
DApps on layer2 are usually built on layer one by taking these capabilities into account. Normally we treat them as guidelines that employ tokens for transactions. Ethereum based DApp deployed as a scaling solution well illustrates how layer 2 works. Transactions can be processed on this secondary layer before committing to the primary one which would some part of the burden off from its mother chain.
Layer3 DApps
Lastly, the most complex layer-three DApps is launched on top of the previous ones. Such DApps hold the information necessary for the interaction between lower layers. One possibility might be saving APIs and scripts required for the level-one and level-two layers to run. For instance, a layer-3 protocol may include various layer-2 Apps (DApps) which will offer a good user experience through all the apps at a go.
Briefly, a DApp is a range of programs that run on a core blockchain underlying framework. Others might further contribute to this basic DApp layer, but they’re all still DApps according to the criteria that have been referred to.
Why use a DApp?
Decentralization is the opposite of running an app on a centralized network and entails many advantages. First and foremost is the very absence of a third party, a key novelty of the self-regulation smart contract. Whereas an invention like Venmo enables you to forward money to anyone, moving such funds into a bank account imposes a fee. Furthermore, cross border transactions in fiat currency may require waiting for many days.
Giving money over a decentralized app is pocket – friendly because the intermediary costs are not there or they are minimal. This minimizes users with fee costs and, most importantly, it saves the time of users since the speed of such transactions is close to an instant.
For sure, decentralized apps don’t work on a centralized server, too. The strongest asset of decentralized platforms is that they can’t be taken down by means of hacking, as there’s no physical part like a server or a hardware wallet to target. It is not only that this makes the network the safest but also it means that there is no time for small breaks. Such apps can be used instantly in our daily life.
However, DApps applies to practically all industry, for instance, entertainment, medicine, government, even data storage. Therefore this makes the utilization of DApp same as the typical apps. Whilst the customers experience all the changes that go on in the back end, the experience at the front end should be unchanged. This manner of communication with multiple applications is known as Web3.0, also the meaning of the distribution of information.
At the beginning, the web was a place for everyone to get information. Little by little, this was used, or centralized, by big companies. The free access which we get from these organizations comes at the price of sharing our data which they sell to earn profits.
Companies, after that, have that information, know what their users buy, how much money they have, and whom they know. The control likewise means they have the power to take it away. Enter a Web 3.0 world where utility of DApps does not come at the expense of privacy.
On the contrary, users have a chance to share only the information relevant for such purposes as medical check-up or a credit and decide who can see it and for what period of time. In this case, companies might pay for these accesses as well, and moreover, the users will benefit from them together. Another issue is that of trust. It is hard anymore to trust people in the world where big companies with so-called high security are leaking usernames, emails, and passwords.
Cons of DApps
While decentralized applications might present a future free of corporations, there are currently some major issues that the industry is working to resolve.
- For one, the lack of a central authority might mean slower updates and platform changes. After all, one party can simply update their app as they please. A DApp, however, requires majority consensus from the acting governance — even for a minor bug fix. This could take weeks or even months as users debate the pros and cons of any improvement.
- Also, DApps require a reasonably-sized user base to operate properly. They need nodes, governance and users just to interact with it. However, accessing DApps can be quite difficult in this early stage, and many aren’t seeing the support they need.
- In the future, accessing a DApp might be a download away. But for now, users must download a DApp-supported browser, send the required crypto to that wallet and interact from there. While tech-savvy users should have no problem with this, the vast majority of people will have no idea where to start.
DApps around the world
DApps in the financial world seem like a no-brainer, but they can really be innovating in all industries. Let’s take a high-level look at some of these benefits in industries such as finance, social media, gaming and more.
Finance
Moneylenders and borrowers can make use of DApps to do their business. With banks, lenders earn certain interest rates based on their money saved. The more a person saves, the more the bank can lend, and the more both parties earn in terms of interest. However, the bank, which acts as a centralized entity, takes a bigger cut than lenders might like, simply for providing a space to store funds.
On a DApp, lenders earn 100% of their interest as there’s no intermediary to pay. That, and they have more control over loans, all while earning tokens from the platform they choose to lend on.
As for borrowers, they have more say in terms of interest paid as well as their time to pay it. Indeed, some platforms allow borrowers to take months or even years to pay off interest, assuming they meet a minimum payment threshold. The borrower can also discuss rates with the lender, ensuring a fair decision for both parties involved.
When all is said and done, the proceeds can occur immediately thanks to smart contract technology. There’s no need to involve lawyers and other third parties which makes the confirmation process take longer and at a greater cost to both parties.
Social media
Users stand to benefit greatly from social media DApps. First off, there’s no one to censor posts, meaning free speech all around. If some posts become a problem, however, the community can vote to have them taken down.
Influencers can earn more as well. On traditional platforms like Twitter, the company profits most from popular tweets. It gains advertisement revenue from all the site visits, and the author gets, well, nothing monetarily speaking, that is.
Social media DApps might have a built-in tipping system using its token, and users can run ads and earn their full payments, rather than a company taking a cut.
Gaming
Gaming has always been an interesting DApp use case. Currently, games require dozens of hours invested in a character to grow — one they’ve likely invested real money in — only for it to sit there and rot when the player moves on.
DApps present a more interesting solution in terms of value. Take a game like CryptoKitties, for example. Players acquire a tokenized asset, in this case, a cat. That cat then grows over time, rising in value if properly raised. A user can then sell that cat for whatever they’d like, assuming there’s a buyer who will pay for it.
Plus, some cats can potentially breed with other cats, creating an even rarer, potentially more valuable cat. Players can trade or collect cats, doing anything they want with these tokenized pets. Their time investment becomes genuinely valuable. There aren’t many now, but imagine that concept in a more fleshed-out title with hours of gameplay. Full-time gaming might be in our future.
Voting and governance
In most cases, voting is a painful process. It often involves various steps of validation — some inaccessible to citizens without proper housing or those who are suffering from other issues. That’s not to mention tampering and similar illicit activity.
A voting DApp can open up the procedure to all thanks to smart contracts. Basically, the community can vote on a list of proposals. Then, they can set up a time frame, say, 24 hours, for users to “stake” their vote with tokens. This opens up participation to all, allowing anyone to vote anonymously at that.
Votes are stored in a decentralized network, making them immutable and untamperable. Plus, smart contracts can reward voters with a relevant token for their efforts, incentivizing more people to vote than ever before.
Fundraising and advertising
Many users take advantage of an ad blocker while browsing online. This is obviously a pain for websites trying to generate revenue, but understandable in some ways as ads have become quite obnoxious in many ways. A browser DApp can fix this.
As users browse the web, they do so with a browser-integrated ad and tracker blocker, earning crypto along the way. Now, as users find creators and websites they’d like to support, they can opt into allowing contributions. This means that the longer a user browses, the more they’re paying to that site over time. Users can even enable ads for those specific sites, helping them more in the long run.
Privacy is the name of the game here. Users choose who can track them, protecting their information and still contributing to platforms that need the money. It’s a win-win situation.
Where is Node.js used?
Real-time Web Socket Wonders
- Just like a caffeine boost to web conversations, Node.js powers chat apps. It's the espresso shot for real-time data exchange!
Robotic Dance Moves with IoT
- Node.js gets gadgets grooving! It's the puppet master for IoT, making devices dance to the Internet's tune.
Javascript Juggler in Microservices
- Playing hot potato with tiny tasks, Node.js is ace for microservices, passing code chunks like a circus act.
Stream Dream Team
- In the data stream band, Node.js is the bass player, handling heavy data flows without breaking a sweat.
Node.js Alternatives
Deno
Deno is a secure runtime for JavaScript and TypeScript built on V8, designed by the original creator of Node.js. Uses modern features, including ES modules.
// Example Deno server
import { serve } from "https://deno.land/std/http/server.ts";
const s = serve({ port: 8000 });
for await (const req of s) {
req.respond({ body: "Hello World\n" });
}
- Includes a standard library.
- Security focused: executes code in a sandbox.
- Uses modern JavaScript features.
- Fewer third-party packages than NPM.
- Community is smaller than Node's.
- Less corporate backing compared to Node.
Go
Go (Golang) is a statically typed compiled language designed at Google, aimed at simplicity and efficiency for server-side applications and networked services.
// Example Go server
package main
import (
"fmt"
"net/http"
)
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello, you've requested: %s\n", r.URL.Path)
})
http.ListenAndServe(":8080", nil)
}
- Compiled language, fast execution.
- Strong concurrency support.
- Simple syntax, easy deployment.
- Lacks some expressiveness (no generics, until recently).
- Dependency management has been historically problematic.
- Error handling can be verbose.
Python with Flask or Django
Python is an interpreted, high-level programming language emphasizing code readability. Flask/Django are frameworks for building web applications.
# Example Flask server
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
return 'Hello, World!'
if __name__ == '__main__':
app.run()
- High readability, quick prototyping.
- Rich set of libraries and frameworks.
- Large community and support.
- Slower execution compared to Node.js.
- Global interpreter lock limits concurrency.
- Less suitable for CPU-bound tasks.
Quick Facts about Node.js
Once Upon a Time, JavaScript Escaped the Browser!
In the mystical year of 2009, Ryan Dahl conjured up Node.js, freeing JavaScript from the shackles of web browsers and unleashing it upon the server-side realm. With its non-blocking I/O model and Event-Driven architecture, Node.js was basically the equivalent of giving JavaScript a Red Bull, allowing it to do more work with less waiting around, like an impatient toddler unleashed in a toy store.
// Classic non-blocking I/O model
fs.readFile("story.txt", (err, data) => {
if (err) throw err;
console.log(data);
});
Version Confusion and Conquer
Node.js versions grew faster than rabbits on a fertility diet. We got a new shiny version about every six months. However, things got a bit hairy with versioning mayhem, causing the community to split into io.js. Fear not, like any good fairy tale, by v4.0.0 in 2015, Node.js and io.js had a happy reunion under the Node.js Foundation, because let's face it – branching and merging isn't just a Git thing.
The NPM Gift Basket
Node.js came with a treasure chest known as npm (Node Package Manager), which started as a modest collection of packages. Fast forward to today, and it's like a genie unleashed, boasting a repository so vast that you can find a package for almost anything. Need to fly a drone with JavaScript? There's a package for that. Want to procrastinate by making ASCII art of your cat? npm has your back.
// Installing a package with npm – as simple as asking for candy
npm install express
What is the difference between Junior, Middle, Senior and Expert Node.js developer?
Seniority Name | Years of Experience | Average Salary (USD/year) | Responsibilities & Activities |
---|---|---|---|
Junior | 0-2 | $50,000 - $70,000 |
|
Middle | 2-5 | $70,000 - $100,000 |
|
Senior | 5+ | $100,000 - $130,000 |
|
Expert/Team Lead | 8+ | $130,000+ |
|
Top 10 Node.js Related Tech
JavaScript (ES6+)
Imagine trying to speak to a Node.js environment and not knowing JavaScript. It's like trying to order a pizza in Klingon; the chef won't get it, and you'll end up hungry. Get familiar with the modern syntax (e.g., arrow functions, promises, async/await). It's the VIP pass to Node.js city!
// Arrow function example
const greet = (name) => `Hello, ${name}!`;
Express.js
It's the Swiss Army knife for Node.js developers! Express.js streamlines the process of building server-side routes and handling HTTP requests faster than a caffeinated squirrel. This minimalist web framework is a must-have when zipping around the backend.
const express = require('express');
const app = express();
app.get('/', (req, res) => res.send('Hello World!'));
MongoDB & Mongoose
Node.js loves MongoDB like a pirate loves treasure. It's a NoSQL database that stores data in JSON-like documents. Mongoose, the trusted sidekick, provides schema validation and translates between objects in code and the representation in MongoDB.
const mongoose = require('mongoose');
const { Schema } = mongoose;
const blogSchema = new Schema({
title: String,
author: String
});
RESTful API Design
Understanding REST is like knowing the secret handshake at an elite Node.js club. It's about creating clean, efficient, and standard ways for systems to communicate over HTTP, making the internet a happier place for servers and clients alike.
Socket.io
It's like telepathy for your Node.js application. Socket.io enables real-time, bidirectional, event-based communication. It's the go-to for when you want your chat app to send messages faster than a kid replying to "Who wants ice cream?"
const io = require('socket.io')(server);
io.on('connection', (socket) => {
console.log('a user connected');
});
Async/Await
Ever been stuck in line at the grocery store? That's your app without async/await. Mastering asynchronous JavaScript means juggling tasks like a circus performer, making sure your app doesn't freeze while waiting for an API response.
async function fetchUserData() {
const response = await fetch('https://api.example.com/user');
const data = await response.json();
return data;
}
Webpack & Babel
Want your Node.js app to be fashionable with the latest syntax trends? Webpack bundles your scripts, while Babel ensures they're understood by all browsers, even the grumpy old ones. It's the makeover dream team for your code!
// webpack.config.js example
module.exports = {
entry: './app.js',
output: {
filename: 'bundle.js'
}
};
Unit Testing (Jest, Mocha/Chai)
Bugs are sneaky pests. Unit testing frameworks like Jest or Mocha/Chai act as the pest control, snuffing out bugs and keeping your codebase clean and healthy like a scrubbed kitchen floor.
// Jest example
test('adds 1 + 2 to equal 3', () => {
expect(1 + 2).toBe(3);
});
NPM/Yarn
Node's package managers are like the supermarkets for developers, offering aisles of libraries to grab off the shelf. Do you need a date formatter, CSV parser, or something else? Chances are there's a package for that, ready to be popped into your project.
GraphQL
If REST API is the well-organized library, then GraphQL is the personal librarian who fetches exactly what you need. It lets clients specify their data needs in queries, cutting down the unnecessary chatter and streamlining data exchange.
const { graphql, buildSchema } = require('graphql');
const schema = buildSchema(`
type Query {
hello: String
}
`);