Hire Blockchain and Cryptography Developer

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Blockchain and Cryptography
Trusted by Businesses

Hire Freelance Blockchain and Cryptography Developers and Engineers

Serhii, Blockchain and Cryptography Developer

$40/hr
Last Job: 25 Jul 2024
Identity Verified
Language Verified
Programming Skills Verified
CV Verified

• 15+ years of commercial software development experience • Solid knowledge of Solidity, C++, JavaScript, TypeScript; • Deep understanding of blockchain architecture and smart contract logic; • Cosmos, Tron, Avalanche, Binance Smart Chain, Ethereum dApps; • Strong skills in developing NFT smart contracts. Support and payload verification; • NFT Marketplaces (ERC - 721/1155), Crypto Payment Solutions & DeFi Cross Chain Bridges - ERC-20 Tokens, ICO, DEX, Staking, Swapping; • Highly qualified knowledge of Stripe payment system integration to blockchain data; • 10+ years experience working with Python; • 5 years experience working with Node.js; • Strong abilities with Express; • Experience working with Docker, and Kubernetes (K8s); • 3+ years of development experience with React.js. • No scheduled vacations within the next 3 months;

Solidity

Solidity

NFT (non-fungible token)

NFT (non-fungible token)

Node.js

Node.js   5 yr.

React

React   3 yr.

View Serhii

Oleksandr O, Blockchain and Cryptography Developer

Last Job: 21 Aug 2024
Programming Skills Verified
CV Verified

- 10+ years experience as a Full-Stack Developer with of developing robust web applications and services, including extensive experience in both frontend and backend technologies; - Technical proficiency with PHP and MySQL for server-side development, advanced JavaScript utilization on the client side; - Strong abilities with blockchain technology engagement, including smart contracts and wallet development using Solidity, Hardhat, Truffle, WalletConnect, and Metamask SDK; - Experienced with libraries Web3.js, and Ethers.js; - Ability to work Ethereum Blockchain, Binance Smart Chain (BSC), with different wallets including MetaMask; - Adept at working with a variety of frameworks and languages beyond core competencies, such as Laravel, Solidity, Node.js, and C++; - Up-to-date with modern practices, possessing comprehensive experience in codebase upgrades, performance optimization, and integrating third-party APIs; - Successfully led a development team, demonstrating strong leadership and project estimation skills.

PHP

PHP   9 yr.

JavaScript

JavaScript   9 yr.

MySQL

MySQL   9 yr.

Solidity

Solidity

View Oleksandr

IVAN ANDRUKH, Blockchain and Cryptography Developer

Last Job: 2 Jul 2024

A highly proficient software engineer with 7 years of industry experience, including 3 years in team leadership. Expert in creating backend systems, with a deep understanding of serverless architectures, microservices, and CI/CD processes. Impressive technical mix includes proficiency in JavaScript/TypeScript, NodeJS, AWS Services, Docker, and relational/non-relational databases. Proven track record in automating and improving systemic stability in high-level projects, with notable AI and automation knowledge. Holds a Master's degree in Computer Engineering, underscoring a solid educational foundation in software development.

AI

AI

Quadient Automation

Quadient Automation

UIPath

UIPath

Microsoft Power Platform

Microsoft Power Platform

AA RPA

AA RPA

View IVAN

Njokom Alain Jr, Blockchain and Cryptography Developer

Last Job: 27 Jun 2024

* Software engineer with over 4 years of experience in mobile app development, specializing in Flutter and proficient in Dart, Kotlin, and Go. * Strong technical expertise in building robust backend systems, REST APIs, and has a keen interest in Blockchain technology within the GCP ecosystem. * Demonstrated ability in web development using modern technologies including HTML, CSS, JavaScript, React, and NextJs. * Active contributor to open-source projects, enhancing the value of platforms like APIDash and GoCoin. * Holds a Bachelor's and a Master's degree in Computer Engineering, underpinning a solid understanding of software development practices. * Recognized for building impactful mobile applications such as Edutive for education and Racha for addiction management.

Flutter

Flutter   4.5 yr.

Go

Go

GCP (Google Cloud Platform)

GCP (Google Cloud Platform)   4 yr.

Firebase

Firebase   4.5 yr.

View Njokom

Demchuk Nazar, Blockchain and Cryptography Developer

Last Job: 26 Jun 2024

Software Engineer with expertise in backend development, blockchain technology, and big data, boasting a solid foundation in computer science from Ukrainian Catholic University. Holds a strong junior/middle experience level, with hands-on Rust, C++, and a gambit of modern technologies such as Solana, Axum, and Kafka. Proven track record of developing robust solutions for cryptocurrency swapping and NFT architecture, time-series data manipulation, and digital media copyright solutions. Notable achievements include contributions to open-source projects, and winning a national programming tournament. Fluent in advanced software engineering paradigms and well-versed in real-time streaming and machine learning library development.

Rust

Rust   1 yr.

C/C++/C#

C/C++/C#   1 yr.

Solana

Solana

Axum

Axum

Tokio

Tokio

View Demchuk
5.0
Based on 9 reviews

Talk to Our Talent Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
Manager
Maria Lapko
Global Partnership Manager

Only 3 Steps to Hire Blockchain and Cryptography Developer

1
Talk to Our Blockchain and Cryptography Talent Expert
Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
2
Meet Carefully Matched Blockchain and Cryptography Talents
Within 1-3 days, we’ll share profiles and connect you with the right Blockchain and Cryptography talents for your project. Schedule a call to meet engineers in person.
3
Validate Your Choice
Bring new Blockchain and Cryptography expert on board with a trial period to confirm you hire the right one. There are no termination fees or hidden costs.

Welcome on Upstaff: The best site to hire Blockchain and Cryptography Developer

Yaroslav Kuntsevych
Upstaff.com was launched in 2019, addressing software service companies, startups and ISVs, increasingly varying and evolving needs for qualified software engineers

Yaroslav Kuntsevych

CEO
Hire Dedicated Blockchain and Cryptography Developer Trusted by People
5.0
Based on 9 reviews
google
Vitalii Stalynskyi August 29, 2023

I have been working with Upstaff for over a year on a project related to landscape design and management of contractors in land design projects. During the project, we have done a lot of work on migrating the project to a multitenant architecture and are currently working on new features from the backlog.When we started this project, the hiring processes were organized well. Everything went smoothly, and we were able to start working quickly. Payments always come on time, and there is always support from managers. All issues are resolved quickly.Overall, I am very happy with my experience working with Upstaff, and I recommend them to anyone looking for a new project. They are a reliable company that provides great projects and conditions. I highly recommend them to anyone looking for a partner for their next project.

google
Henry Akwerigbe August 30, 2023

This is a super team to work with. Through Upstaff, I have had multiple projects to work on. Work culture has been awesome, teammates have been super nice and collaborative, with a very professional management.There's always a project for you if you're into tech such Front-end, Back-end, Mobile Development, Fullstack, Data Analytics, QA, Machine Learning / AI, Web3, Gaming and lots more.It gets even better because many projects even allow full remote from anywhere!Nice job to the Upstaff Team 🙌🏽.

google
Roman Masniuk August 25, 2023

I worked with Upstaff engineers for over 2 years, and my experience with them was great. We deployed several individual contributors to clients' implementations and put up two teams of upstaff engineers. Managers' understanding of tech and engineering is head and shoulders above other agencies. They have a solid selection of engineers, each time presented strong candidates. They were able to address our needs and resolve things very fast. Managers and devs were responsive and proactive. Great experience!

google
Volodymyr August 11, 2023

Leaving a review to express how delighted I am to have found such a great side gig here. The project is intriguing, and I'm really enjoying the team dynamics. I'm also quite satisfied with the compensation aspect. It's crucial to feel valued for the work you put in.Overall, I'm grateful for the opportunity to contribute to this project and share my expertise. I'm thrilled to give a shoutout and recommendation to anyone seeking an engaging and rewarding work opportunity.

google
Maryna Navo September 25, 2023

Крутий сервіс, зручна комунікація. Допомогли з закриттям мого питання на 200%

Hire Blockchain and Cryptography Developer as Effortless as Calling a Taxi

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FAQs on Blockchain and Cryptography Development

What is a Blockchain and Cryptography Developer? Arrow

A Blockchain and Cryptography Developer is a specialist in the Blockchain and Cryptography framework/language, focusing on developing applications or systems that require expertise in this particular technology.

Why should I hire a Blockchain and Cryptography Developer through Upstaff.com? Arrow

Hiring through Upstaff.com gives you access to a curated pool of pre-screened Blockchain and Cryptography Developers, ensuring you find the right talent quickly and efficiently.

How do I know if a Blockchain and Cryptography Developer is right for my project? Arrow

If your project involves developing applications or systems that rely heavily on Blockchain and Cryptography, then hiring a Blockchain and Cryptography Developer would be essential.

How does the hiring process work on Upstaff.com? Arrow

Post Your Job: Provide details about your project.
Review Candidates: Access profiles of qualified Blockchain and Cryptography Developers.
Interview: Evaluate candidates through interviews.
Hire: Choose the best fit for your project.

What is the cost of hiring a Blockchain and Cryptography Developer? Arrow

The cost depends on factors like experience and project scope, but Upstaff.com offers competitive rates and flexible pricing options.

Can I hire Blockchain and Cryptography Developers on a part-time or project-based basis? Arrow

Yes, Upstaff.com allows you to hire Blockchain and Cryptography Developers on both a part-time and project-based basis, depending on your needs.

What are the qualifications of Blockchain and Cryptography Developers on Upstaff.com? Arrow

All developers undergo a strict vetting process to ensure they meet our high standards of expertise and professionalism.

How do I manage a Blockchain and Cryptography Developer once hired? Arrow

Upstaff.com offers tools and resources to help you manage your developer effectively, including communication platforms and project tracking tools.

What support does Upstaff.com offer during the hiring process? Arrow

Upstaff.com provides ongoing support, including help with onboarding, and expert advice to ensure you make the right hire.

Can I replace a Blockchain and Cryptography Developer if they are not meeting expectations? Arrow

Yes, Upstaff.com allows you to replace a developer if they are not meeting your expectations, ensuring you get the right fit for your project.

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