Blockchain Development & Consulting Company

At Upstaff, we specialize in helping Web3 unicorns develop cutting-edge blockchain applications. With expertise in over 30 blockchain protocols, we are leading the charge toward the web3 future with our advanced blockchain development services.

Contact us today to discuss how we can help you unlock the potential of blockchain technology to boost your project.

NFT Marketplaces

Our Blockchain Development Services

We provide a full range of services, from blockchain development to consultancy, enabling businesses to make use of the technology and stay ahead of the pack in the cut-throat world of web3. With our expertise and industry knowledge, we can guide you through the entire process, from conceptualization to product launch.

Upstaff as a blockchain development team provides a wide range of outsourced blockchain software development services. This includes building blockchain ecosystems, smart contracts, dApps, as well as integrating blockchains and enterprise solutions. As a web3 development firm, Upstaff only hires highly specialized developers with a proven track record. That’s why we can handle any task or project, even the most complex ones.

Hire the Upstaff team
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Meet our Blockchain Development & Consulting Company Development Team

Oleksii , Senior JavaScript Full-Stack Engineer

Identity Verified

- 10+ years of experience in web development, M.Sc in Software Engineering - Mastery of JavaScript and its associated frameworks and libraries, such as React, Angular, and Vue.js for front-end; Node.js, Next.js for back-end and React Native for mobile app development. - Experience with PHP and Cloud infrastructure such as AWS. - Proficiency in using version control systems (e.g., Git) and familiarity with DevOps practices for continuous integration and deployment (CI/CD). - Implementing and overseeing testing processes, including unit testing, integration testing, and end-to-end testing. - Experience leading and mentoring a team of developers, including assigning tasks, providing guidance, and ensuring the team's success. Ability to motivate and inspire team members, resolve conflicts, and provide constructive feedback. - Experience conducting assessments and interviews remotely.

JavaScript

JavaScript   8 yr.

React

React   8 yr.

TypeScript

TypeScript   5 yr.

Node.js

Node.js   5 yr.

Next.js

Next.js   3 yr.

Serhii , Solidity & Full-stack Web3 Engineer, Architect, Team-Lead.

Identity 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.

Denys K , Python Developer

Identity Verified

- Strong background in computer engineering and automation; - 5+ years of experience with Python; - Good knowledge of the blockchain industry and web3 project development; - Proven expertise in developing mobile applications, crafting solutions for crypto services, and creating telegram mini-apps; - Skilled in web automation, bot development, parsing, and working with web3 technologies.

Python

Python   5 yr.

QA Automation

QA Automation   3 yr.

Telegram API

Telegram API

Telegram Mini Apps

Telegram Mini Apps

Anatolii K. , Python Software Engineer

$30/hr
Identity Verified

- 5 years of experience in the IT industry as a Python Engineer - Proficient in using technologies such as Django DRF, Flask, Pandas, BeautifulSoup, SQLAlchemy, Asyncio, Flask + Marshmallow, Apscheduler, Jinja, Quip API, Docker, Nginx, Amazon MWS API, Amazon SP-API, Google API, and Telegram API; - Strong in refactoring, bug-fixing, and working with Python, JavaScript, Django, Django Rest Framework; - Skilled in developing faceted search and matching algorithms using ElasticSearch; - Experienced in PDF generation and importing from various formats; - Developed web applications, API interfaces, and automated scripts for data transformation; - Previous experience includes working as a Python developer focused on data scraping for Amazon, eBay, and Walmart products in dropshipping projects; - Also worked as a C# developer on various projects, specializing in web development, scraping, and parsing data; - Upper-Intermediate English; - Available ASAP

Python

Python

Django

Django

Flask

Flask

Yurii P. , Haskell and Scala Engineer, Plutus smart contracts developer

Identity Verified

- 3 years of experience in Plutus / Cardano smart contracts developer role (Plutus Core, Plutarch) - Cardano ecosystem knowledge - Haskell, Scala, Cabal/Stack, GADTs/Type families, Generics, Servant, lenses, mtl, free monads - senior-level professional - Functional programming with FRP, Redux, Event sourcing, Category theory - OOP, OOD, UML, Design patterns, SOLID, DI. TDD, BDD, Unit, functional, and integration testing - 14 years of experience in software engineering

Haskell

Haskell   3 yr.

Scala

Scala   2 yr.

Akka

Akka

Plutus

Plutus   2 yr.

Cardano

Cardano

Sergey B. , Full Stack web3 developer

- Full Stack Developer with strong Blockchain skills. - 10+ years of experience in IT. - Experience with Blockchain projects since 2017. - In-depth knowledge of blockchain integration to the backend. - Upper-Intermediate English. - Available ASAP.

web3

web3

Node.js

Node.js

NestJS

NestJS

PostgreSQL

PostgreSQL

AWS (Amazon Web Services)

AWS (Amazon Web Services)

Oleksandr O , Full-stack Developer

- 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

Our Most Common Engagement Models

Project-based Model

Get a custom platform design along with any other services you might need (expert consultations, product design, web engineering, digital platforms, mobile application development, Operations and Clouds, Data and Analytics, Desktop, Embedded systems, Blockchain, No-code/Low-code, Website optimization, SEO and much more) at a fixed price.

Dedicated Development Team

Get a dedicated team of software developers working on your project according to our flexible time and materials payment scheme.

Consulting

We help our clients to identify the potential of a software development for their organization including market research, project’s feasibility assessment, analysis of blockchain platforms, tools, right features prioritization.

Our cooperation process

01

Requirement Gathering

Meetings with stakeholders to gather detailed functional and non-functional requirements.

02

Blockchain Platform Selection

Evaluating Blockchain platforms (e.g., Ethereum, Hyperledger, etc.) based on project requirements.

03

Design and Architecture

Creating comprehensive Blockchain architecture and defining data models, consensus mechanisms, and security protocols.

04

Smart Contract Development

Developing smart contracts to automate business logic and transactions.

05

Frontend & Backend Development

Developing frontend and backend components of the Blockchain application.

06

Blockchain Integration

Integrating the application with the Blockchain network by setting up nodes and connections

07

Security Testing

Performing extensive security testing, including vulnerability assessments and penetration testing.

08

Deployment

Deploying the Blockchain application on the chosen network.

09

User Acceptance Testing

The stage of inviting stakeholders and end-users to validate the usability and effectiveness of the application (known as UAT for short) through user acceptance testing.

10

Launch and Maintenance

Running the Blockchain application and providing support when errors arise or when updates are needed.

Case Studies

We closely collaborate with recruitment & talent acquisition teams on urgent or
hard-to-fill positions. Discover how startups and top-tier companies benefit.
Upstaff Scales Ukrfinservice Platform with Qualified Digital Signature and System Upgrades
Case Studies

Upstaff Scales Ukrfinservice Platform with Qualified Digital Signature and System Upgrades

20x Active Users for Airdrop Platform with Telegram Mini-App and Chatbot
Case Studies

20x Active Users for Airdrop Platform with Telegram Mini-App and Chatbot

Building Electronic Data Interchange (EDI) for the Top Online Pet Food and Supplies Retailer
Case Studies

Building Electronic Data Interchange (EDI) for the Top Online Pet Food and Supplies Retailer

Blog

Tap-to-Earn Game Development on the TON Blockchain
Blockchain (Web 3.0)

Tap-to-Earn Game Development on the TON Blockchain

Blockchain technology has sparked rapid evolution in the gaming industry over the past decade. The latest development in this trend is ‘tap-to-earn’ games: play-to-earn games so simple that they can be reduced down to tapping – simple, mindless, often addictive, and ultimately remunerated with cryptocurrency or some other kind of digital asset.
Bohdan Kashka
Bohdan Kashka
Data Analyst job description
Delivery Management & Analytics

Data Analyst job description

Roman Masniuk
Roman Masniuk
Time to Fill: A Key Recruitment Metric
Delivery Management & Analytics

Time to Fill: A Key Recruitment Metric

Yaroslav Kuntsevych
Yaroslav Kuntsevych
Tap-to-Earn Game Development on the TON Blockchain
Blockchain (Web 3.0)

Tap-to-Earn Game Development on the TON Blockchain

Blockchain technology has sparked rapid evolution in the gaming industry over the past decade. The latest development in this trend is ‘tap-to-earn’ games: play-to-earn games so simple that they can be reduced down to tapping – simple, mindless, often addictive, and ultimately remunerated with cryptocurrency or some other kind of digital asset.
Bohdan Kashka
Bohdan Kashka
Data Analyst job description
Delivery Management & Analytics

Data Analyst job description

A Data Analyst is someone who collects data from different areas of the business and uses the information to make decisions or help other members of the team, or the leadership team, make decisions.
Roman Masniuk
Roman Masniuk
Time to Fill: A Key Recruitment Metric
Delivery Management & Analytics

Time to Fill: A Key Recruitment Metric

Time to fill is one of the most important recruitment metrics that every hiring manager should know. It provides an insight into the strengths and weaknesses of your recruitment strategy.
Yaroslav Kuntsevych
Yaroslav Kuntsevych
More Articles Arrow

Frequently Asked Questions

What is Upstaff? Arrow

Upstaff is a service company with its own in-house engineering, and management competence, leveraging the community of software development companies’ resource network.

When can my team start work? Arrow

Our developers can start immediately or within two weeks after the project is confirmed.

Do you provide blockchain project development consulting? Arrow

Yes. Upstaff provides blockchain tech consulting services, which include blockchain protocol selection for your project and/or technology trade-offs check.

Do you make custom blockchain development? Arrow

Upstaff is a web 3 software development company with an emphasis on blockchain technology. Custom outsourcing blockchain development for startups and enterprises is our main focus.

Do you offer blockchain application development? Arrow

Yes. Upstaff specializes in decentralized applications development. Our main focus is turned to DeFi applications development, DAO – Decentralized Autonomous Organizations, staking platforms, crypto wallets, crypto games and decentralized exchanges.

What blockchain technologies do you work with? Arrow

Our developers specialize in the following blockchain technologies: Ethereum, BSC, Polygon, NEAR, Aurora, Solana, Polkadot, Avalanche, Secret Network, StarkNet, Dfinity, Klayth.

Do you provide project support & maintenance services? Arrow

Yes. Upstaff offers complex solutions that further can be maintained by our blockchain development team post product launch.

What are the key considerations when choosing a blockchain framework for enterprise solutions? Arrow

Scalability, consensus mechanisms, privacy, interoperability, and ease of integration with existing systems are all a part of the equation, depending on the blockchain framework one picks. Meaningful use cases, regulatory requirements, and the nature of integration with other legacy systems are all important considerations for enterprise environments.

What are the cost implications of implementing blockchain technology in existing business infrastructure? Arrow

The actual price will depend on the type and length of solution you need, what systems you need to integrate with, and whether your application needs maintenance.

How does blockchain technology ensure data security and privacy for enterprises? Arrow

Blockchain architecture and cryptographic algorithms guarantee data safety and confidentiality: no third party can access the information encoded by the transactions that make up the chain, which are encrypted on every user’s computer and arranged in chronological order.

How can you scale your blockchain solutions to high transaction volumes? Arrow

Upstaff, a top Blockchain development company, uses several methods to boost the network’s scalability, such as sharding, sidechains and optimised consensus protocols.

Is Blockchain Hackable or Not Hackable? Arrow

Because blockchain is decentralised and reliant on cryptographic principles, its security is strong. Nothing is completely unhackable, but successfully ‘pwning’ a blockchain is a rare and difficult feat.