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Hire Oleksandr O, Vetted Full-stack Developer Developer | Upstaff

Oleksandr OFull-stack Developer

PHP 9yr.
JavaScript 9yr.
MySQL 9yr.
Solidity
...
- 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.
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Seniority Senior
Location Ukraine
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Hire Vadym M., Vetted Front-end JavaScript Developer Developer | Upstaff

Vadym M.Front-end JavaScript Developer

JavaScript 9yr.
React 8yr.
TypeScript
...
  • Front-end JavaScript Engineer with 9 years of commercial experience;
  • 8+ years of hands-on experience with React, and TypeScript, including complex component architectures, shared UI libraries, and micro-frontend approaches using Module Federation;
  • Experience with automated testing, covering unit, integration, and end-to-end tests using Jest, React Testing Library, Cypress, and Playwright;
  • Experience with Next.js, focusing on performance optimization, scalability, and modular application design;
  • Expertise in Web3 and blockchain integrations, including crypto wallets, on-chain data, and decentralized authentication;
  • Background in FinTech and crypto products, delivering secure, user-facing interfaces for wallets, cards, and transaction flows;
  • Experience working and leading within distributed Agile teams, collaborating closely with backend, security, and product stakeholders.
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Seniority Senior
Location Castel San Giovanni, Italy
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EW

Eric WangSenior Web3 / Full Stack Developer

React
Ext JS
SOLID
Node.js
Python
...
Engineer with 8 years in Web3 and AI/ML development, specializing in decentralized applications and scalable web platforms using React, Next.js, Laravel, and EVM-based blockchain tech. Proficient in Solidity, Python, Node.js, and Rust, with expertise in smart contracts, Web3.js, and AI integration. Experienced in Agile/Scrum methodologies, CI/CD pipelines, and remote collaboration. Holds a Computer Science degree from University College London and has led projects for Ocean Protocol and major streaming platforms using Next.js for high-performance, SEO-optimized frontends.
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Seniority Senior
Location Denver, United States
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A

AbhinayBlockchain Developer

NFT 5yr.
Smart Contract
FDD
CI/CD
SOLID
...
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.
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Seniority Senior
Location Indore G.P.O., India
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MK

Max K.Blockchain Engineer

Solidity 5yr.
Java 5yr.
Solana 2yr.
...
- 7+ years of experience building scalable Web3 applications and DeFi platforms with Solidity, Rust, and Java in Blockchain, DeFi, NFT Tokenization, Fin-Tech domains - Strong expertise in smart contract development across Ethereum, Polygon, Solana, and Hedera, using ERC standards, Anchor, and Foundry - Designed and optimized zero-knowledge circuits (ZKPs) and decentralized identity systems (DID) for privacy-preserving applications - Integrated oracle networks (Chainlink, Pyth) and implemented advanced DeFi mechanics: yield farming, auto-compounding, AMMs, and on-chain governance - Developed secure and gas-efficient smart contracts using EIP-712, proxy patterns, and off-chain signature schemes - Built robust backend and API layers (Node.js, Java, GraphQL) with optimized database performance in PostgreSQL and MongoDB - Delivered full-stack dApps with seamless wallet integration (MetaMask, WalletConnect, HashPack) and deployed them on Vercel / AWS - Contributed to CI/CD, testing, and code quality using Hardhat, Slither, TestContainers, Jenkins, and GitHub Actions
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Seniority Senior
Location Warsaw, Poland
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M

MaksimBlockchain Software Engineer

Java 5yr.
Solidity 3yr.
ETH (Ethereum blockchain) 3yr.
TypeScript 2yr.
Node.js 1yr.
...
- Software Engineer with 5 years of experience in building web applications and expertise in blockchain, DeFi, NFT, and tokenization domains. - Proficient in programming languages such as Solidity, Node.js, Python, and Java. - Experienced in back-end development using technologies like Spring, Hibernate, and JDBC. - Skilled in working with blockchain technologies including Ethereum, ERC721, ERC1155, and EIP712. - Familiar with CI/CD tools like Jenkins and containerization platforms like Kubernetes and Docker. - Strong knowledge of database management systems like PostgreSQL, MySQL, and MongoDB. - Well-versed in agile methodologies like Scrum and Kanban, with a solution-oriented approach to project objectives.
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Seniority Senior
Location Poland
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WalletConnect Developers Tech Radar

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Developers by tech:

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Hire Binance Smart Chain Developer
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Hire Phantom Developer
Hire Phantom Developer

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Want to hire TonKeeper Developers? Then you should know!

Table of Contents

What is TON and Why It Matters

The Open Network (TON) is a decentralized blockchain platform originally developed by Telegram and now maintained by an open-source community. TON is designed for ultra-fast transactions, scalability, and seamless integration with Web3 applications. With its efficient consensus mechanism and native cryptocurrency (Toncoin), TON is gaining traction as a powerful blockchain for decentralized finance (DeFi), gaming, and digital payments.

Key TON Statistics

  • Market Cap: Over $10 billion in total valuation.
  • Active Wallets: More than 3 million registered TON wallets.
  • Transaction Speed: Handles up to 100,000 transactions per second (TPS), making it one of the fastest blockchains.
  • Adoption: Increasing partnerships with major Web3 projects and enterprises.

Find and Hire the Best TonKeeper Developers with Upstaff

Looking for skilled TON Keeper developers to enhance your blockchain project? Upstaff connects you with top-tier engineers who specialize in TON Keeper, ensuring secure and efficient wallet integrations within the TON ecosystem. Our developers have hands-on experience in smart contracts, blockchain security, and decentralized finance (DeFi) solutions.

Why Hire TonKeeper Developers with Upstaff?

  • Vetted Experts: We provide access to pre-screened developers with proven expertise in TON Keeper and related blockchain technologies.
  • Fast Recruitment Process: Quickly scale your team with our streamlined hiring process, reducing time-to-hire and ensuring project continuity.
  • Flexible Engagement Models: Hire developers on a full-time, part-time, or contract basis, depending on your project requirements.
  • Cost-Effective Solutions: Get access to top talent at competitive rates without compromising on quality.
  • Full Project Support: Our developers are skilled in integrating TON Keeper with various dApps, ensuring seamless wallet functionalities and security.

Key Skills of Our TonKeeper Developers

  • Smart Contract Development: Proficiency in writing secure and efficient smart contracts for TON blockchain.
  • Wallet Integration: Experience in integrating TON Keeper with decentralized applications (dApps) and token-based ecosystems.
  • Blockchain Security: Strong understanding of cryptographic principles and security best practices in Web3 applications.
  • DeFi and NFT Experience: Expertise in developing decentralized finance (DeFi) and NFT-based solutions on the TON network.
  • Front-End & Back-End Development: Knowledge of modern programming languages and frameworks for seamless user experience.

How to Hire a TonKeeper Developer with Upstaff

  1. Share Your Requirements: Tell us about your project needs, tech stack, and ideal candidate profile.
  2. Get Matched Instantly: Our AI-powered platform will connect you with the best TON Keeper developers available.
  3. Interview & Select: Assess the candidates through interviews and technical evaluations.
  4. Onboard & Start Building: Hire the right developer and start working on your TON-based project right away.
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FAQ: Hiring TonKeeper Developers

What is TonKeeper? Arrow

TonKeeper is a secure cryptocurrency wallet designed for The Open Network (TON), allowing users to store, send, and receive Toncoin and other assets while interacting with decentralized applications (dApps).

What are the benefits of using TonKeeper? Arrow

TonKeeper provides a user-friendly interface, high security, fast transactions, and seamless integration with TON-based dApps, making it a top choice for managing digital assets in the TON ecosystem.

How can a TonKeeper developer help my project? Arrow

A TonKeeper developer can integrate wallet functionalities into your dApp, enhance security, optimize transaction processing, and ensure compliance with blockchain best practices.

What technologies do TonKeeper developers use? Arrow

They typically work with programming languages like Rust, Solidity, and Python, along with blockchain frameworks, cryptographic security tools, and Web3 development environments.

How long does it take to hire a TonKeeper developer with Upstaff? Arrow

With Upstaff, you can find and onboard a qualified TonKeeper developer in just a few days, ensuring a quick and efficient hiring process.