Hire Vetted Blockchain Engineers at Upstaff - Page 4

- 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.

Software Developer | Backend & Web3 Engineer | Golang, TypeScript, PythonResults-driven software developer with 3+ years of experience in building scalable backend systems, financial infrastructure, and Web3 solutions. Proficient in Golang, Python, TypeScript, C++, and cloud-native technologies (AWS, Kubernetes, Docker).🔹 Currently at Syndr, designing high-performance exchange servers, optimizing data pipelines, and developing Web3 SDKs. 🔹 Previously at Epifi, led UPI-based financial workflows and transaction processing using Temporal. 🔹 Ex-Smarsh, where I improved database architecture and query performance for SaaS compliance solutions.Passionate about distributed systems, blockchain, and high-performance computing. Active contributor to open-source and tech communities.📌 GitHub: AbhinitKumarRai | LinkedIn: Abhinit Rai

Software Engineer with 4 years of experience specializing in high-volume business code development and project management. Expertise in SEO integration, digital marketing, and Web3 community management with a strong background in using project management platforms and community moderation tools. Holds certifications in Community Management, Project Management, Digital Marketing, and Web3 management. Recognized for leading Web3 community initiatives, improving follower retention by 20% with analytical protocol enhancements. Technical skills include Project Management (5 years), Unreal Engine, DigitalOcean, and MS SQL Server Management Studio (each 4 years), along with proficiency in iOS Core Graphics and CSP.

- Certified Senior Go Engineer ( 12 years with Go, 19 years in Software Engineering) with experience in software engineer, team lead and software architect roles. - Master’s Degree in Computer Science - Designed and implemented a scalable multi-microservice backend for an enterprise AdTech CRM, integrating 10+ third-party services and streamlining client management operations. - Built and deployed a billing system for a money exchange platform, integrating third-party payment systems and delivering a user-friendly web interface for seamless transactions. - Optimized data processing pipelines by implementing quantiles on streams, enabling real-time analytics and supporting large-scale data operations for scientists and business stakeholders. - Extensive background in data processing and reporting.

- Full-Stack Engineer with over 8 years of experience specializing in Web2 and Web3 technologies, blockchain development, and Full-Stack architecture. - Has 4 years of experience working with web3, implementing blockchain solutions using Ethereum, Solana, and smart contracts. - Proven expertise in tokenization, NFT integration, and cryptocurrency transactions for real estate, voluntary donation, and other industries. - Expertise in Node JS, Nest JS, and RESTful APIs, with proficiency in React JS for frontend development. - Strong experience with databases like PostgreSQL, Redis, MongoDB, and DynamoDB. - Well-versed in cloud services, including AWS and GCP, and experienced in container orchestration with Kubernetes. - Proficient in CI/CD using Jenkins, GitHub Actions, Bitbucket Pipelines, and Terraform. - Familiar with Nginx for web server management and ensuring smooth application deployments.

- 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.

- Full Stack Developer with strong blockchain skills. - Over 10 years of experience in IT. - More than 7 years of experience with Node.js and Nest.js. - Strong skills with Express.js. - Over 7 years of experience with PostgreSQL. - In-depth knowledge of Docker and Kubernetes. - Experience with Angular. - Experienced in blockchain projects since 2017. - In-depth knowledge of blockchain integration into the backend. - Upper-intermediate English. - Available ASAP.

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.

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.

- 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.

Software engineer with 3+ years of experience in RPA and software development. Holds a Bachelor's in Mechanical Engineering and a Master's in Information Systems. Proficient in Power Automate, UiPath, Power Apps, and has extensive work with automation tools across E-Commerce, Healthcare, Finance, and Banking sectors. Technical expertise in scripting and programming languages such as VB.NET, ASP.NET, Java, JavaScript, Python, and SQL. Recognized for significant contributions to client project success and process efficiencies in professional tenure. Skilled in SDLC, RPA lifecycle, cloud services, and migrations from UIPath to Power Automate, indicating versatility and readiness for complex technical challenges.

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.

- 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

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

- 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.

- 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.

- 3 years of experience with Rust - Efficiently deployed web application powered by rust backend. - Built innovative microservices and Web Services using Web Actix and diesel. - Engineered and maintained modern web assembly application using Rust . - Developed web application using sqlx and Web Actix. - Strong front-end interaction skills with Solidity transactions. - Highly qualified knowledge of working with Metamask wallet, transactions, and fees for them. - Upper-Intermediate English. - Available ASAP.

- 7+ years experience as a web developer; - 2 years of experience with developing smart contracts in Rust; - Deep skills working with Solana blockchain; - Good abilities working with Anchor; - 5+ years experience working with C#; - Good knowledge of JavaScript, and TypeScript; - 2+ years experience working with Angular framework; - Experience with Node.js, and NestJS; - Good abilities working with .NET; - Experience working with Docker; - Upper intermediate English.

- More than 17 years of commercial experience in IT; - Experience cooperating with clients worldwide and building products related to various spheres: e-commerce, real estate, custom CRM, trading, social media and many more. Product tech design and full cycle of development and support; - Deep experience in development web applications using Ruby on Rails, Rust, Java, JavaScript, Go; - Strong experience of AWS, Azure Clouds, Google Clouds; - Experience in team leading and CTO; - Upper-Intermediate English; - Available: ASAP.

- 8 + years experience in IT; - 5+ years experience working with Rust; - Good skills in creating smart contracts for Solana and NEAR Blockchains; - Experience in building a bridge to Casper Network; - Experience working with Filecoin, Zero Knowledge modules, and Fuel Blockchain; - Deep abilities with MySQL, PostgreSQL, MongoDB; - Experience working with Python, Java, PHP, Scala, and Spring; - Good knowledge of AWS ElasticSearch; - Experience working with Docker and Kubernetes (K8s); - Experience working with DeFi and DEX projects; - Deep skills with Apache Cassandra and Apache Spark; - English: Upper-Intermediate.

- 4 years of development experience, including 2 years of Rust development and 2 years of previous Python backend development experience. - Development and design of high-load fintech solutions using Rust and Python - Experience with Rust microservices (Actix Web, Rocket, AWS Lambda) - Upper-Intermediate English

- Started career as a Ruby on Rails developer and worked exclusively with it for around 4 years, after which switched to Elixir and have 3.5 years of commercial experience with it - Last version engaged with RoR: 5.2 - Proficient in Phoenix / Elixir, Ruby on Rails, and AngularJS, focusing on performance improvements, test coverage, and refactoring. - Foundational knowledge of Haskell and Plutus for writing smart contracts on the Cardano blockchain. - Upper-Intermediate English

- More than 10 years of experience in developing applications using JavaScript and TypeScript - Experience with a setup a blockchain IoT network using the Hyperledger(infrastructure) - Built a system and smart contracts, that are deploying into ETH network for digital signing of contracts for each deal of customers - Setup an ETH explorer - Build a web game, based on Solana, NFT tokens - Experience with a migration from a monolithic architecture to microservices, it helped to spread jobs between teams and increased development speed, also here grew and lead the most productive team in the company (11 people) - For the KYB/KYC platform startup based in Estonia architectured and implemented a whole app with Nest.js and React, it helps to build scale and flexible application, CQRS architecture - Built processes for project lifecycle from development to release, CI/CD, started and scaled team, held workshops for the team - Built a headless modern framework for frontend that based on React, swiftly increased a development speed - Solved problem with a slow project building, increased speed x7.7 (210s ->27s) - Supported a quite aging project and migrated some parts to microservices, wrapped into Kubernetes - Optimized database queries, increased x3 - Suggested a better structure for a codebase for GraphQL and React, increased development speed - Architecture & Tech Lead at Node.js Department

- PHP Backend-developer with 10+ years of experience. Most of my career I use Laravel as my main instrument. Worked in teams up to 10 members as backend-dev. - Also worked as freelancer - full-stack dev/manager: finding clients worldwide and communicating with them directly, creating teams of 2-3 people and managing their work - Upper-Intermediate English

-Software Engineer with 5 years of professional experience, working across eCommerce & retail, Marketplace, Healthcare, Entertainment, Education, and Blockchain, Game domains. -Proficiency in PHP, JavaScript, TypeScript, React - Knowledge of Vanilla JS, Native PHP, PHP-Selenium - Experience working with Web3 marketplaces, nodes, on-chain, and off-chain transactions - Knowledge of Web3, understanding of Abi, Smart Contracts; Tampermonkey, Greasyfork - Knowledge Css3, Bootstrap 4; RPC; GitHub; MySQL - Has a successful track record of developing applications from scratch and optimizing existing systems, evidenced by projects such as a Learning Platform, Event Manager, and a Website for a Coin Game - Computer Science and Software Engineering Foundation

- Software Engineer with more than 5 years of commercial experience in software development - Interested in cloud computing, software architecture design, and efficient algorithms - Deep knowledge of Web development technologies - Excellent knowledge of common software engineering practices, like OO principles, modern design patterns, test-driven development, continuous integration, and continuous deployment - Extensive experience in building architecture and database optimization - Extensive experience in mentoring specialists, making code review - Quick learner, team player, goal-oriented and responsible. - Upper-Intermediate English

- Software Engineer with 5+ years of commercial experience building software from scratch; - Good knowledge of main clean code principles like DRY, SOLID, YAGNI, KISS; - Have experience building software solutions from the ground up: from discussion with clients or businesses to understand the problem, field of study and problem research, to deployment and post production support. - Upper-Intermediate English. - Available ASAP.

- Position: Project Manager (PM) with Knowledge of French - Educational Background: Master's degree from IAE Lyon, with specialization in international business development, strategic management, and marketing. - Project Management Experience: Managed engineering vehicle projects and marketing initiatives at renowned companies such as Daimler AG, Renault Group, and PSA Group. - Strategic Insights: Coordinated strategic projects focused on customer satisfaction across markets and headquarters. - Market Analysis Expertise: Conducted an in-depth study of the German automotive insurance market. - Technical Proficiency: Analyzed vehicle development projects and processes, ensuring alignment with organizational objectives. - Native French - Fluent English

- Highly Professional Software Engineer with 7+ years of expertise in QlikView and over 2 years of hands-on experience in the blockchain industry. - Proficient in Solidity and DAML Smart Contracts, he possesses a strong command of blockchain technologies. - With developed analytical and problem-solving skills, Oleg excels in identifying efficient software solutions to complex challenges. - He consistently meets project requirements and delivers results within deadlines. - Upper-intermediate English.

Blockchain Developer and Software Engineer with over 5 years of hands-on experience. Skilled in multiple key programming languages including Rust, Solidity, Python, JavaScript, and TypeScript, and proficient in English with a B2 level. Holds a comprehensive education in Computer Science and Software Engineering. Technical expertise is demonstrated in diverse blockchain environments like Ethereum, Polygon, and Solana, including advanced skills in smart contracts development, security optimizations, and integration of various blockchain technologies. Proven track record in backend development with frameworks such as Django and Node.js, cloud services like AWS, and proficiency in DevOps tools such as Docker, Kubernetes, and Terraform. Successfully improved deployment speeds by 40% through Helm charts and bolstered smart contract security to mitigate 95% of exploit vectors. Combines a passion for programming with effective leadership and project management abilities which contributes to technological advancements and project success.

Software engineer with a comprehensive background in full-stack and blockchain development. Proficient in languages like Rust, Solidity, TypeScript, C#, and C++, with 3 years in JavaScript and Solidity. Strong focus on blockchain ecosystems, having utilized Solidity, Ink!, and Substrate across various innovative projects, including a SPL-token creation using Solana and a cybersecurity platform for Earth satellites leveraging blockchain tech. Experienced in both front-end and back-end paradigms, employing .NET 7, ASP.NET, and React, and tools like Docker and Swagger for deployment and API management. Responsible for leading the development of complex web3 applications, such as a staking platform and a branded shoe online store, showcasing a strong understanding of SDLC, including testing with tools like Hardhat and Foundry. The engineer's project roles demonstrate an ability to handle full-stack responsibilities and a proven track record in delivering robust, scalable applications in diverse domains such as game development, e-commerce, and NFTs.