Kapalı

I'm looking for a senior blockchain developer

Hi! We are looking for a backend dev with experience on processing / decoding large amounts of ethereum transactions. We are looking to index all dex + nft TX in a database. Full-Time position possible after task completion.

there is a catch:

I also need the metadata URLs from NFT contracts that are being used on OpenSea (or actually all NFT contracts that get published). you are aware that usually the metadata URL is added to contracts later by calling a function, so "constant" monitoring is needed

also - I need this to be viable for very, very quick (as fast as possible) reaction times. Eventually, a tool that works on this foundation might want to trigger reactions quickly (e.g. copy a trade on a DEX or a minting of a NFT)

maybe even - thats just a bonus - with current balances visible for buyer / seller at any time (time of the transaction) and other small things..so basically as soon as a token gets approved for listing on opensea (which would be the very first time it appears on opensea, before the first sale), we start looking for a metadata URL on the contract address

basically (i am not a dev, if its not obvious by now) we need to check if transactions use a function called setBaseURI for ERC721 (i hope thats the right number) or if any other call to the contracts holds a URL. it wont work in 100% of cases. some people solve it different. some do it weird. but it should work in more than 80% of cases.

If you are interesting this project and saw all requirement carefully, write "decode transaction" in the head of your coverletter.

Beceriler: JavaScript, Ethereum, Smart Contracts

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İşveren Hakkında:
( 5 değerlendirme ) Vladikavkaz, Russian Federation

Proje NO: #31847301

Bu iş için 16 freelancer ortalamada $1385 teklif veriyor

point2solutions

Dear client, Hope are you doing well there, Project requirement:- I'm looking for a senior blockchain developer I'm very much comfortable to assist you for creating ethereum Blockchain, smart contract, Cryptocoin, w Daha Fazla

$3000 USD in 25 gün içinde
(6 Değerlendirme)
6.8
nuprogramer

"decode transaction" I am Blockchain developer, specialized in custom cryptocurrency and blockchain development, having extensive experience in ICO, POS – Proof of Stake, blockchain website, web portal, & smart contr Daha Fazla

$3000 USD in 5 gün içinde
(10 Değerlendirme)
4.8
(12 Değerlendirme)
5.1
vinodmalviya5436

I'm Blockchain developer Backend developer : NodeJS,.NetCore since 2002 Frontend developer : HTML5,js,jquery,angular,react since 2002 Database developer : mysql,MSSQL serve Daha Fazla

$1500 USD in 7 gün içinde
(6 Değerlendirme)
3.5
Neha28R

Hello recruiter, I am Neha, I have experience with Cryptography and Blockchain using Node and React.JS. I also have an understanding of Flow Blockchain, [login to view URL], ETH, and WETH. I have worked on NFT projects, expert o Daha Fazla

$1350 USD in 7 gün içinde
(7 Değerlendirme)
3.1
shussee89

decode transaction Hello, I would like to be considered for the job post to as a blockchain developer and Java developer. I'll do the task as per your mentioned requirements. I'm interested in a long term relationshi Daha Fazla

$760 USD in 7 gün içinde
(5 Değerlendirme)
2.7
dominicnzioka197

HELLO DEAR EMPLOYER, First receive warm greetings, and hoping you are good, i welcome you to TOP GRADE SERVICES LTD, the home of Amazing services and quality. EXPERT IN NAMED SKILLS, OVER 18 YEARS OF EXPERIENCE, After Daha Fazla

$1125 USD in 7 gün içinde
(5 Değerlendirme)
4.1
cergij

decode transaction As a senior blockchain & financial engineer and full stack web developer, I am very interested in this project. I have developed Hybrid (Ce-FI & De-FI) Exchange and Trading (Margin & Futures) Platfor Daha Fazla

$750 USD in 7 gün içinde
(1 Yorum)
2.0
jitendrasingh16

Hi I would be very happy to work on your document immediately. I have gone through the project details ‘senior blockchain developer’ which you are willing to get ready. 1. The work will be delivered to you before and o Daha Fazla

$1000 USD in 7 gün içinde
(0 Değerlendirme)
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incredimate

Hey, INCREDIMATE STUDIO is here to help you! Kindly come inbox to analyze our work so you can know us well and thats why you need to hire us for your work and we promise you will not regret for your time :) We underst Daha Fazla

$1125 USD in 7 gün içinde
(0 Değerlendirme)
0.0
avnisapna27

Dear Hiring Manager, I would love to take this opportunity and would like to discuss the requirements in details. Can we schedule a voice/video call to proceed further. Quick Introduction: I am 100% skilled full stac Daha Fazla

$1100 USD in 30 gün içinde
(0 Değerlendirme)
0.0
KajaKs

Dear Sir. I have 7+ years of experience in bitcoin. I think I can help you perfectly. This is my working with blockchain Portfolio ✓ ~Portfolio [login to view URL] Daha Fazla

$1125 USD in 7 gün içinde
(0 Değerlendirme)
0.0
vadimseveryn

Decode Transaction I read your description carefully, i can do it with high quality. I would like to have a chat for more detail I am looking forward to your good news.

$1500 USD in 7 gün içinde
(0 Değerlendirme)
0.0
RayHuang0301

Dear. Nice to meet you, I am Ray. I am very interested in this job. I touched blockchain technology from 2017 and self-learning related technologies until now, including ERC20 crypto launching, blockchain gambling gam Daha Fazla

$1200 USD in 7 gün içinde
(0 Değerlendirme)
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NikitaSemenov00

Hi, great to meet you. I am very glad to apply for this project. I am a blockchain-based Dapp developer who are well-versed in React, Vue.js, Node.js, Web3js for the frontend and backend development. I have full experi Daha Fazla

$1000 USD in 7 gün içinde
(0 Değerlendirme)
0.0
ajnatural

Hey there! I've worked on multiple NFT projects that have sold out within minutes. I've built all kinds of features on top if them like games, mutations, staking and burn mechanisms. I know the space really well and ca Daha Fazla

$1125 USD in 7 gün içinde
(0 Değerlendirme)
0.0