Smart Contract Development Company

TOP 6 Smart contract development services

Best smart contract platforms we work on

Upstaff has extensive experience creating blockchain and blockchain based solutions. We not only offer our clients all-purpose smart contract development but also advise them to choose the most suitable blockchain platform. We go through every tiny detail of each specific smart contract use case and help customers choose one of the platforms cited below.

Some of the industrial smart contract solutions we deliver

Blockchain, and smart contracts in particular, are applicable across many industries, so it’s a one-size-fits-all platform for your business regardless of the industry you’re operating in. Upstaff creates smart contract for other companies as part of our daily development. These are just some of the industries we cover.

We Use the following Technologies for Smart Contract

Brownie
Cardano
Cardano
ERC-1155
ERC-20
ERC-223
ERC-721
ERC-777
ETH (Ethereum blockchain)
ETH (Ethereum blockchain)
EVM
Ganache CLI
Hardhat
Hardhat
Haskell
Haskell
NEAR
NEAR
NFT
NFT (non-fungible token)
NFT (non-fungible token)
OpenZeppelin
Plutus
Plutus Core
Remix
Rust
Rust
Solana
Solana
Solidity
Solidity
Substrate
Substrate
Truffle
Truffle
Truffle suite
Waffle
Web Assembly
WebAssembly
WebAssembly

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Meet our Smart Contract development team

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.

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

Kris , Blockchain & Full Stack Software Engineer

Identity Verified

- Engineer who has 6+ years of experience with many programming languages, frameworks, and platforms; - 2+ years experience with developing smart contracts on Rust; - Solid skills with Solidity; - Working experience in building an NFT marketplace platform on Polygon and Binance Smart Chain using ERC-721 and ERC-1155; - Experience with ether.js, web3.js, and JS/TS frameworks; - Familiar with blockchain Ethereum, Binance, Tron, Solana, Polkadot, Tezos, Polygon, Huobi ECO chain, etc; - Deep knowledge in implemented Metamask, Torus, and other wallets to increase user experiences with the web apps; - Advanced English; - Available ASAP.

Solidity

Solidity

Rust

Rust   2 yr.

Abhinay , Blockchain Developer

Accomplished Blockchain Developer with over 5 years of expertise in designing and implementing advanced applications with a focus on blockchain technology, smart contract and dApp development. Strengths include hands-on experience with PoS/PoA sidechains, Ethereum, Binance, Tron, and a plethora of ERC standards, backed by robust skills in Golang, JavaScript, Solidity, and cloud technologies. Proficient in fostering innovative database design, API development, and server management, which are further enhanced by a seasoned track record in deploying blockchain solutions on AWS and GCP. Distinguished by participation in high-profile projects like decentralized exchanges and NFT platforms, showcasing not only technical prowess but also effective collaboration with cross-functional global teams and deployment of CI/CD pipelines.

NFT (non-fungible token)

NFT (non-fungible token)   5 yr.

Smart Contract

Smart Contract

DFF (Feature Driven Development)

DFF (Feature Driven Development)

CI/CD

CI/CD

SOLID

SOLID

LUCAS KIM , SENIOR FULL STACK DEVELOPER

Senior Full Stack Developer with a Master’s in Computer Science and a depth of experience in front/backend technologies across multiple domains. Practical knowledge of Python, Django, Next.js, NestJS, and a robust foundation in PostgreSQL. Proven capability in leading development projects, optimizing database schemas, and leveraging CI/CD pipelines with Docker and Kubernetes. Skilled in Agile methodologies, project management, and UI/UX design paired with a substantial background in IoT solutions, showcasing versatility and technical prowess. Recognized for streamlining operations, reducing costs through automation, and advancing retail technology platforms.

PHP

PHP

NestJS

NestJS

Microservice Architecture

Microservice Architecture

TypeScript

TypeScript

React

React

Vladislav , Full Stack Developer

- 6+ years experience as a Software Engineer; - 2 years experience working with Go; - Deep abilities working with Rust; - Good knowledge of creating smart contracts; - 4 years experience working with JavaScript, React, Next.js, Redux; - Experience working with TypeScript; - 3+ years of experience working with Node.js; - Good skills working with NestJS; - Experience working with Python, Swift, Kotlin, Flutter, Express; - Experience working with AWS; - Experience working with PostgreSQL, MongoDB; - Good skills on team lead - led ~12 people; - Took part in all aspects of product design and engineering, from marketing, and business investigation to the MVPs for start-ups, pitch decks, and mock-ups; - Upper-Intermediate English.

JavaScript

JavaScript

Rust

Rust

Go

Go   2 yr.

Node.js

Node.js

NestJS

NestJS

Steven S. , Go/Solidity Blockchain Engineer

- Fast-paced, high-quality, detail-oriented, and self-motivated developer with more than 10 years of experience in the IT industry. - I use the TDD approach for designing the architecture and implementing scalable and maintainable web apps/services. - I have been working on a bunch of projects and meanwhile, I worked in several positions across frontend developer, backend developer, full-stack developer, and lead engineer. - Bridge Smart Contract which is for transferring tokens across networks. - NFT Dapps such as madlab, Art Basel, Fateful Youth - eWallet App and GSM e-commerce product. - Smart contracts in complex Defi and DEX structure - Blockchain networks including Ethereum, BSC, Polygon, and Solana. - Deploy and work on various kinds of tokens - ERC20, ERC721, ERC721A, ERC1155. - Cross-chain smart contracts using LayerZero - NFT market smart contract for auction and offer with lazy minting - Proxy smart contract - NFT marketplace Dapp using Venly - Available: ASAP

Go

Go

Solidity

Solidity

James B. , Senior Blockchain & Full Stack Developer

- Senior Blockchain & Full Stack Engineer with over 15 years of experience in Web and Blockchain development. - Highly skilled Blockchain Professional with hands-on experience building Decentralized Applications and NFT Marketplaces. - Deep understanding of the architecture and protocols of Blockchain and Hyperledger including Bitcoin, Ethereum, L2 solutions, Cross-Chain. - Concentrating on ICO/IEO/IDO projects, helped many Startups and enterprising companies to raise funds and build Ecosystems on the Blockchain. - Quant Developer with a rock-solid understanding of Financial Markets, Quant Trading. - Strong at Solidity, Python, Rust, Web3.js, React, Typescript, Next.js, Node.js, Moralis. - A Veteran at C/C++/C#. - Great teamwork and troubleshooting skills. - Full-time remote, 40+ hours a week. - Upper intermediate English

C

C

C++

C++

Tony Scott , Rust Engineer

- 5+ years of experience in blockchain development - Advanced English - Available ASAP

Rust

Rust

Michael B. , Rust Developer

- 15 years experience with programming languages VB, C/C++; - First projects - embedded devices on AVR/STM32/ESP and applications for windows. - But since ~2017 I'm using an embedded experience very seldom and mostly developing software for Linux on C++. - Since 2022 I have switched the Rust and don't want to use C++ as the main language anymore. - Intermediate English.

Rust

Rust

Martin C. , Expert Rust/Solidity Smart Contract Blockchain Developer

-As a senior Programmer and Blockchain developer, with over 6 years of development, I am an expert in NFT Website, NFT Art Generation, and NFT Marketplace, Solidity, Web3, EVM based network chains, Custom smart contracts, ERC20/721, ERC1155, NFTs, IDO's, Bridges Block explorers, UI Web3 Dapps Integration, IPFS. - Smart Contract Development (Solidity/ Rust/ Anchor Framework/ Cosmwasm) - Cardano smart contract by utilizing CosmWasm smart contract by utilizing Rust CosmWasm. - Solanasmartcontractimprovement(Unittest,Solana-program-library,Solana-web3,Raydiumtradeandorca)by utilizing Rust and Anchor system. - Polkadot Relay Chain using Substrate in Rust programming. - Smart contract advancement in networks (Ethereum, BSC, Matic/Polygon) by utilizing Solidity. - Uniswap V2, V3, Curve (Yearn, Convex), Sushiswap, Quickswap, etc. - Written smart contracts for ERC20, ERC223, ERC721, ERC1155, ICOs, airdrop, Vesting, MultiSig, Wallet, etc - DeFi, Dex protocols - Front-end development with Smart contract integration by utilizing Web3, truffle. React (Redux/Thunk/Saga), Typescript, Node js. - NFT minting website andNFT marketplace development(Create a listing by admin, flat&Crypto payment,Bundle Sale/ Bulk Transfers, Drop)

Rust

Rust

Solidity

Solidity

Steven , Blockchain Software Engineer

- Fast-paced, high-quality, detail-oriented, and self-motivated developer with more than 10 years of experience in the IT industry; - I use the TDD approach for designing the architecture and implementing scalable and maintainable web apps/services. - I have been working on a bunch of projects and meanwhile, I worked in several positions across frontend developer, backend developer, full-stack developer, and lead engineer; - In-depth skills develop smart contracts on Solidity; - Good skills working with Go; - 3 years experience with Rust; - 2 years experience with Substrate; - Smart contracts in complex DeFi and DEX structure; - Bridge Smart Contract which is for transferring tokens across networks; - Proxy smart contract; - eWallet App and GSM e-commerce product; - Blockchain networks including Cosmos, Ethereum, BSC, Polygon, Avalanche and Solana; - 5+ years experience with Node.js; - Deep skills working with Apollo GraphQL; - Good abilities working with Hardhat framework; - Deploy and work on various kinds of tokens - ERC20, ERC721, ERC721A, ERC1155; - Cross-chain smart contracts using LayerZero; - NFT Dapps such as madlab, Art Basel, Fateful Youth; - NFT market smart contract for auction and offer with lazy minting; - NFT marketplace Dapp using Venly; - Available: ASAP.

Solidity

Solidity

Go

Go   3 yr.

Node.js

Node.js   5 yr.

3 most common engagement models:

Project-Based Smart Contract Development

Our project-based engagement platform allows your business to quickly develop new products or services. Using our project-based structure, we collaborate with you to figure out what your project needs are and provide premium Smart Contract Development Services. We care about project goals and timelines.

Dedicated Smart Contracts Development Team

We have dedicated development teams to help your company develop cutting-edge products that leverage decentralized web benefits. Our professional smart contract Developers will exclusively work on your project and create high-quality Smart Contract Development Solutions.

At our smart contract development company, we provide team extensions services so that your company can grow in the ability to develop and deliver faster. Our smart contract developers are certified and can easily fit into your existing team to provide high-end services.

Smart Contract Consulting and Audit

At Upstaff, we specialize in providing consulting services to help make the right decisions regarding smart contracts development, smart contracts audit, conducting thorough market research, feasibility assessment, analysis of blockchain platforms, prioritizing of features, etc. We provide consulting services to align your project with the market needs and business objectives so that your product works successfully and is sustainable on the market.

Our cooperation process

01

Business and technical analysis

Before even committing a single line of code, we thoroughly review the client’s needs, the project requirements, and any potential risks the application may face later on. We also conduct a technical review of the project and recommend the blockchain network in which the app will be deployed.

02

Technical design

This phase allows Upstaff’s team to develop the technical blueprint of the project and create all the required documents that will be utilised later in putting into practice. Our smart contract development company considers every small detail of the future application to accommodate all use cases of clients.

03

Development

After doing all the preparation work, it’s time to create the code and construct the app as specified in the documentation. When written into the blockchain, smart contracts can never be modified or undone. Therefore we employ the Testnet to ensure it is error and bug-free and that it meets all the specifications of the documentation.
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04

Testing stage

At this stage, our specialists run all sorts of audits, including security one, to uncover every possibility of any deviation from what we’ve outlined in advance. We even look for all possible leaks and plug them. This step also includes how optimized the app is for Upstaff’s experts.

05

Deployment on Mainnet

Once the app is tested on Testnet and adjusted to its performance, the smart contract can be sent to the selected blockchain network. As more users and capabilities are added, any change will be possible because of the open-source nature of the code.

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

Frequently Asked Questions

What is a smart contract? Arrow

Smart contracts are software programs executed by computers on a blockchain network. Each smart contract contains code that carries conditions that, when fulfilled, executes actions. Because they are deployed on a decentralized blockchain rather than a centralised server, smart contracts let multiple parties arrive at a collective conclusion accurately, efficiently, and without the possibility of manipulation.

Powered in their current incarnation by the Ethereum blockchain, smart contracts have been the foundation of the Web3 space; the core of DeFi, NFT, gaming and other Web3 centric applications.

Whether it is codifying arbitrarily defined contract terms between irreconcilable entities, automating and decentralized markets, or issuing fungible and non-fungible tokens, smart contracts are how developers implement decentralized blockchain applications. Follow on for a primer on smart contracts and society’s impact.

What are the benefits of a smart contract? Arrow

One benefit of using them is that they mitigate or even eliminate the need for intermediaries. Smart contracts operate in a completely autonomous fashion, and so neither party is required to keep track of its execution. These apps can never be changed, which makes smart contracts one of the most secure and efficient ways to establish digital contracts. They can be implemented across most, if not all, the domains and specialties.

What are smart technology’s advantages over traditional contract? Arrow

They are fast and secure. Smart contracts are what get you out of the middleman and, as a result, make all your trades and operations cost-effective.

What are the best blockchain frameworks for smart contract creation? Arrow

When it comes to selecting the best smart contract development platform, our professionals look at various factors, such as transaction speed, scale, consensus type, etc.

How do smart contracts work? Arrow

These are software programs that consist of a particular series of events and states. Upon achieving some state, something specific occurs.

What does smart contract do? Arrow

Such a digital contract is commonly deployed across many industries to provide independent payments of any kind that can be made rapidly and cost effectively.

What is the most popular smart contract? Arrow

The blockchain world has a lot of good smart contracts out there, but the best one by far is Ethereum’s ERC-20 token standard. It has since become the preferred method of creating new tokens on the Ethereum blockchain, powering millions of ICOs and dApps.

Which Platform is Best suited for Smart Contract development? Arrow

Ethereum is the most used and preferred platform for creating smart contracts because of its excellent infrastructure, vast developer community, and language compatibility. Other platforms, such as EOS, TRON, and Binance Smart Chain are also increasingly being used for smart contract development.

What programming languages do you use to write smart contract? Arrow

Here at Upstaff, we are leveraging Solidity which is a programming language built specifically for Ethereum blockchain-based smart contracts. Depending on the requirements of our clients, we may use other languages such as Rust and Vyper.

3 Smart Contracts Trends in 2024 Arrow

1. Seamless Integration with Traditional Business Operations

Perhaps the biggest 2024 trends would be blending smart contracts with existing business processes. Businesses are becoming increasingly conscious of how smart contracts can streamline, reduce costs, and mitigate risk through automated day-to-day tasks and compliance with the agreement.

In supply chain management, for example, smart contracts can automatically track and validate the goods which will eliminate fraud and error. Smart contracts can speed the transfer of property instantly in real estate by eliminating intermediaries and thereby accelerating the transaction.

Smart contracts are transforming the legal world, too. Legal documents are typically very tedious and time-consuming, but smart contracts automate a lot of this. For example:

Contract Execution Automated: Smart contracts are executed automatically under pre-set conditions with no need for user action.
Dispute Resolution: Since there are clear and irrefutable signatures on the blockchain, disputes can be quickly and transparently settled.
Law Enforcement: Smart contracts can make sure they are legal, and comply with laws and regulations by writing rules into the code.

The more businesses that leverage blockchain technology, the more smart contracts will enter their processes, creating innovation across multiple industries.

2. Enhanced Regulatory Frameworks and Broader Adoption
As governments and regulators around the world begin to see the potential of blockchain and smart contracts, they’re attempting to come up with guidelines and standards for their adoption. With the EU’s support for the Data Act, including a critical provision to govern smart contracts, we have made a massive leap toward more transparency and security. The US, and even Asia, are moving toward building smart contract regulatory infrastructures as well.

What does this mean? More regulatory clarity will enable businesses to make more strategic use of smart contracts. With clear legal frameworks, smart contracts can become more widely used across industries with broad acceptance. This transformation will also address security, privacy and compliance issues and create an ecosystem that is conducive to innovation and expansion.

3. Breakthroughs in Decentralised Finance (DeFi)

One of the most innovative uses of smart contracts is DeFi. Smart contracts are at the heart of the DeFi revolution, enabling decentralised financial services. Smart contracts – from decentralised exchanges to loan ecosystems – are automating billions of dollars of transactions per day, propelling the DeFi industry and providing financial services that are accessible and interoperable across blockchain networks.

We’re always working on new DeFi protocols and platforms to give consumers even more advanced, safe financial products. Artificial market makers (AMMs), yield farming, and decentralised exchanges (DEXs) are a few innovations that will further advance and give users greater access to financial services and investment possibilities.

What Trends to Expect in 2025 Arrow

Looking ahead to the future, several trends are expected to shape the future of smart contracts:

  • Identity Management
    Using blockchain technology, our smart contract development services can help individuals create a secure and portable digital identity. By implementing smart contracts, we can provide individuals with control over their digital identity, streamlining identity verification processes across different organizations. This will help reduce identity fraud and increase the security of personal data.
  • Lending
    Our smart contract development services can help lending platforms reduce the need for intermediaries and minimize credit risk. We can automate lending processes by implementing blockchain-based smart contracts, enabling faster and more cost-effective loans. This will help reduce costs for lenders and borrowers, increasing access to credit and improving the efficiency of lending platforms.
  • Insaurance
    At our smart contract development company, we can help automate insurance claims processing using blockchain-based smart contracts. By implementing smart contracts, we can create a transparent and secure system for insurance claims processing, ensuring timely and accurate compensation while minimizing fraud and errors. This will help reduce costs for insurers and increase trust in the insurance system.