Back End Jobs & Projects

18 jobs found

We found 18 Back End jobs that paid in cryptocurrency. Search for work, find a remote job that suits your needs, and apply now!

Work and hire for crypto

Use LaborX to extend your opportunities as a freelancer or to source talent from a global marketplace. Secured by blockchain, powered smart contracts.

Hiring Web3 Developers to create an NFT Marketplace

Required skills

The ideal candidate will be responsible for developing high-quality Dapps. They will also be responsible for designing and implementing testable and scalable code. We are looking for a passionate and experienced Web3 developer to help us build our project for an NFT Marketplace similar to OpenSea.
Responsibilities
Develop quality software and web applications
Analyze and maintain existing software applications
Design highly scalable, testable code
Discover and fix programming bugs
Must be able to fulfil our requirements... Reach out to find out more about our requirements.

Budget

$10,000
Show more

bitcoin flashing software

Posted by yusuf dev

Required skills

if you are looking for bitcoin flashing software for laptop version and android version .....slide into my inbox now and ask for the type of bitcoin flasher you want and also i sold mysoftware already with license key for 300$usdt for the fast person that is interested but the software is for laptop version ......
MESSAGE NOW

Budget

$200
Show more

Develop Titano fork (BSC - Olympus DAO Fork Lookalike)

Posted by Alex T

Required skills

Hi all,
I am looking for a solidity developper can fork the Titano platform.
It is very similar to Olympus or Time Wonderland, except you don't need to stake manually. 
Your tokens are stakes automatically. See the contract here:
https://bscscan.com/address/0xba96731324de188ebc1ed87ca74544ddebc07d7f#code
https://app.titano.finance
Feel free to contact me!
Thanks
Alex

Budget

$2,000
Show more

I will develop your mobile app iOS and android apps

Posted by mobile app

Required skills

Hello my great buyer 
Are you looking for a professional android developer for your iOS mobile app developer to develop an app for your idea? I am here to help you with that I've been a professional mobile app developer for years with full experience in mobile app developmentI will provide a solution with a responsive attractive mobile app the product will be exactly like you have in your mind. Am capableenough to take your app to a level where your user will be more interested in my experience
My skill includes:
Material Design 
. Authentication (Phone, Facebook Gmail, GitHub.) ETC
Google APIs-(Maps, Places, Direction, Drive, Speech To Text, text to speech, cloud Translation, Analytics
Rest APIs 
Social Media Chats
Third-Party Libraries
Ads-Mob Integrations
Payment Using Credits, Debit Cards
Contact me now and let make things happen.
Thanks...….

Budget

$1,500
Show more

Need GURU of web development! (pretty basic website stuff)

Posted by j.tippetts

Required skills

We are looking for someone that can help me build an entire web online presence. Here is a brief overview:
A; an overall design concept to tie all sites and services together. Logos, colors, buttons, favicons, etc. We want it to look great fro the start. NOTHING TOO EDGY! This is are licensed legitimate builders and brokers just all working together to creat a a service that's meaningful.
1. Need an informational website built for a "Bitcoin Homebuilder". We are a licensed general contractor looking to grow a side hustle helping people utilize Bitcoin to build the home of their dreams! Site will need lots of content and informational graphics, etc explaining the basics of why and how someone may decide to use bitcoin to fund the construction of their home with.
2. Need a real estate based website typical of what you would find with most real estate brokerages. ( Information and bios on real estate agents, the broker, etc.) Pages to show special homes that are for sale using bitcoin partially or in full. plus the ability to work with an API from local multiple listing services to show all homes available in an area, with search function, etc. like I said I believe most of this will just be integrating with existing systems.
3. A website that merges the first two together by offering loans collateralized by bitcoin, escrow payment services for construction draws, managing the bitcoin part of any real estate transaction and also would like this site to have market charts, tools, calculators like payment calculators, affordability, lightforecasting option 9 like what would happen if the value of coin dropped or raised during the term of the process, etc.
4. Behind the scenes to power all of the website would need to be a CRM, email addresses, project management, scheduling software, accounting tools and Ideally we would like ALL of these sites and services to be set up to be self hosted Things like maybe "OpenProject" or "odoo" or a combination of a few. on maybe a large Synology at first and backed up to a cloud server.
I would welcome all proposals, this will definitely require some ongoing work over time but we would like to start getting sites up as quickly as possible.

Budget

$1,500
Show more

Update existing website

Posted by Anonymous

Required skills

Hi, 
I need to update this website https://topdogs.pugmafia.io
Front end:a twitter button that tweets to someone. Each time a user clicks and tweets, it changes and the user can tweet to another twitter account. 
Back end: Allow to add excel or cvs file with the name of the twitter accounts. 
Create different tweets, so they are randomly generated for each tweet that is generated. 
Example: 
User goes to the website clicks on the tweet button with the name of the twitter handle, it redirects them to tweeter with the @twitterhandle and the written tweet. 
The user tweets, goes back to the site and a the button has changed, now it has different tweeter handle when the click, it redirects them to tweeter and it has a different written tweet to the one before. 
 

Budget

$500
Show more

Full stack developer

Posted by daniel

Required skills

Looking for a full stack developer to join our team. You'll work on the projects we're developing in the iGaming/Entertainment area, where the features you work on will be used by thousands of users.
You should know very well:
- HTML
- CSS
- JavaScript
- NodeJS
- Vue.js
- Express
- MongoDB
- PostreSQL
- git
Knowing these is a plus:
- AWS
- command line
- Linux
- Steam
We're looking for someone that is able to work full time (no part time or other commitments) and is close to the GMT timezone. Must be willing to sign an NDA.

Budget

$5,000
Show more

Opensea autobidder bot

Posted by Kujo

Required skills

Skills required:

Javascript
NodeJS
Opensea.js https://github.com/ProjectOpenSea/opensea-js
web3.js
Heroku
Git
Project is to create a NodeJS bot to axutomatically make offers on a provided list of NFTs using an ethereum wallet (admin wallet)
Logic:
The bot should check the current top offer price of each of the NFTs in the list every 6 hours
If the current top offer is not in ethereum no action should be taken
If the current top offer of an NFT is the admin wallet then no new offer should be made
If the current top offer of an NFT is under the maxOfferPrice for the NFT then the bot should make an offer on the NFT
The offer made should be the current top offer price + 0.02 ETH
The bot will be deployed to Heroku and repository will be hosted on Github.
The list of NFTs to watch will be provided as a CSV with 4 columns: tokenId, tokenContract, minOffer, maxOffer
The admin wallet details will be provided as an address and private key

Budget

$800
Show more

Web app developer for ICO fundraising platform

Posted by Rohan Vij

Required skills

Hi all,
I am looking for a web app developer to produce an ICO fundraising platform (featuring pre, crowd, general sales)
ICO founders can list tokens on the decentralised multi-tiered staking/fundraising platform for investors to browse in an e-commerce style platform and therefore purchase tokens in ETH
I would like a referral, pooling and messaging system/community system too 
Please message me for further details
UK based

Budget

$300
Show more

Dashboard Web - FrontEnd - Landing Page

Posted by Manana Samuseva

Required skills

Looking for: FrontEnd, Full-stack developer skilled at creating business applications and API Intergrations. Commercial cloud, AI development experience on AWS, Amazon Elastic Compute Cloud (Amazon EC2)
Dashboard Web Developer for handling our video+audio interference for Al.
What does this Solutions Implementation do?
Product: ML sevice to extract meaningful insights and customer sentiment from multimedia (video-audio)
Dashboard: services necessary to ingest, store, analyze, and visualize AI for content ctreators
Visualization: Building insightful dashboardfrom the analyzed data
www.manan.AI
https://t.me/sumuper_bot

Budget

$400
Show more

Build a crypto website on wordpress

Posted by Peter Deward

Required skills

We are seeking a Developer to build a dynamic and responsive website for a crypto project.
We'll provide the design files as well as icons and images.
The website doesn't require no payment features nor sign up.
For more informations please contact us.

Budget

$150
Show more

Proxy of the decentralized exchange Pancakeswap

Posted by Minato Kitagawa

Required skills

Introduction and basic information:
This task is about development of a “proxy of the decentralized exchange Pancakeswap”. See example websites.
A BEP20 token already exists and can be traded normally on Pancakeswap.
The goal of this task is to give the customer easier access to buy and sell their tokens, as well as to provide and remove liquidity to the trading pair and view charts.
Example:
https://safemars.app/#/swap
Here you can see that, you can connect your wallet through the browser, buy and sell tokens, add and remove liquidity, and see the chart of safemars.
We would like to have exactly the same as https://safemars.app. Exactly the same functions, the same design, layouts, etc.
Only the colors, the trading pair, i.e. the token should not be SafeMars but another token and some links have to be changed.
Sources:
You can find everything here:
https://github.com/pancakeswap
https://github.com/uniswap
Requirements:
The token must appear in the search results. This should make it easier for the customer to buy and sell, as the contract address no longer has to be entered manually.
The logo of the token must of course be implemented.
The color of the page must match with the main website.
When buying and selling, the trades should be made as usual though pancake swap engine / router.
We do not want to develop our own DEX engine, it should only serve as a proxy to simplify buying and selling for the customer for that specific token only.

Budget

$1,000
Show more

Create a Faucet!

Posted by Manan Sharma

Required skills

I want you to combine 2 faucets in one,
https://freebitcoin.win (everything in this you will have to code, the points system, manual Faucet, games, staking etc, I will tell you token name later)
This also has auto Faucet but I don't want auto Faucet like that, 
https://proinfinity.fun I want auto Faucet like this (i can provide script of this site) I would like some extra features to be added here and this should work with the tokens I mentioned above, also there should be option to pay from auto Faucet directly to expresscrypto or Faucetpay, or to balance where balance provides bonus etc.

Budget

$100
Show more

Web developer with experience in Cryptocurrencies

Posted by Joker Art

Required skills

Hey,
I need to build a block explorer for different coins (altcoins), This can be a long-term project with 1 coin initially and growing out later. I need someone who is experienced in building good-looking websites (As I have no design in mind) and someone who knows how to communicate with crypto nodes and getting data out of them.
I can also hire 2 developers, in case you can only do backend or frontend work.
I will provide you with the node, so you're job will mainly be developing the backend/frontend of the website.
Let me know what's the cost you have in mind considering the simple block/tx/address pages as well as staking and such as well as any experience you have in doing something similar to this.
Thanks

Budget

$3,000
Show more