Upstaff Developer Profile Directory

-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)

- 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

Software engineer with extensive experience in mobile development for platforms including iOS and Android, specializing in Flutter. Skilled in upgrading and optimizing applications, evidenced by migrating a codebase from Flutter 2.5.0 to 3.3.0 within 3 months and implementing a dark mode theme. Demonstrated expertise in integrating bank APIs, adding savings features, and transitioning from Provider to Riverpod for state management. Proven ability in using Lottie for smooth animations and developing responsive designs, alongside proficiency in Dart, HTML5, and Postman API technologies. Holds a Bachelor's degree in Electrical and Electronics Engineering, underlining a strong engineering foundation. Co-founded a health-tech startup and contributed to e-commerce, Fintech, AI, and health sector projects, showcasing a breadth of industry exposure and technical versatility.

The engineer in question manifests proficiency in mobile application development, with extensive experience in the creation and enhancement of complex platforms within the Nigerian market. Possessing demonstrated expertise in Flutter and Dart for cross-platform development and a grasp of native API interfacing using Swift and Kotlin, the engineer has effectively employed TypeScript for cloud function management on Firebase. Additionally, the engineer has skilfully set up CI/CD with Fastlane and integrated real-time communications with websockets, contributing to the delivery of robust, user-friendly applications. Maintaining a strong focus on performance and stability, the engineer leverages tools such as Firebase Crashlytics and Flutter's performance profiling. Moreover, the engineer's background encompasses a Computer Science degree, providing a sound theoretical foundation underpinning their practical skills. With a portfolio featuring innovative features like AI-based verification, video calling via the Agora SDK, and advanced in-app transaction functions, the engineer’s technical acumen ensures a performance-focused and user-centric development approach.

Software engineer with 4+ years of experience specializing in mobile app development, including UI/UX design, with expertise in Flutter and integrations with Firebase. Highlights include leading the development of mobile platforms for companies like Boostmate Inc and PDA Funds, improving app performance, and maintaining high coding standards. Proven track record in applying Agile methodologies, performing unit and E2E testing, and employing tools such as Git/GitHub for project management. Holds a computer science degree from Kwame Nkrumah University of Science and Technology, emphasizing this candidate's strong theoretical and practical foundation in software engineering.

Seasoned software engineer with a Bachelor's degree in Computer Engineering and 4+ years of experience in app development. Proficient in Dart, Swift, Obj-C, Java, and skilled in MySQL. Delivered a patient aid app using Flutter & iOS with coreML integration. Played pivotal roles in agrotech projects, contributing to social media feed functionality and offline accessibility. Expertise extends to Flutter plugin development, enhancing data syncing, and deep linking. Solid background in SDLC, agile methodologies, and CI-CD practices, leading to efficient and effective project execution.

Software engineer with a B.Tech. in Computer Science from VIT, bringing over 2 years of experience in software development with a focus on Flutter, Angular, and Java. Known for leading a team of developers to a 25% productivity increase and spearheading project efficiencies that cut time-to-market by 20%. Engineered solutions for Amadeus Labs that enhanced code quality and accelerated development speed, including a pivotal legacy code migration to Angular 15, which significantly improved user experience. Proven expertise in mobile and web app development, evidenced by the successful launch of an Anime Social Entertainment App and a personalized image-sharing app 'Qutu', with the latter achieving 2k downloads within its first 6 months on the Google Play Store. Proficient in Dart, NodeJs, Firebase, Google Analytics, and modern SDLC practices, this engineer's technical acumen and industry experience make them a standout candidate.

- 6 years experience with Python - Proficiency with Python, SQL, ETL, AWS Services. - Experience with scraping data (tiki, lazada, shopee, aliexpress), Amazon Dropshipping Business projects, e-commerce platforms, platforms of digital data. - Location: Vietnam

- Lead Java Engineer and Architect with extensive experience designing and implementing scalable, high-loaded solutions for cloud services and secure VPN connections. - Proficient in Java (J2SE, J2EE), C#, Python, HTML, CSS, JavaScript, and Angular. - Expertise in frameworks and technologies such as Spring Boot, Spring Framework, Servlets, REST web services, JUnit, Dropwizard, and EJB3. - Skilled in building and maintaining CI/CD pipelines, deployment flows, and conducting deployments. - Proficient in working with GCP and has experience with AWS and Azure. - Experienced with databases and search technologies, including ElasticSearch, MongoDB, PostgreSQL, Derby SQL, Couchbase, and Google Cloud SQL. - Strong capability in requirements analysis, documentation creation, and customer communication. - Proven leadership in mentoring and guiding junior developers and leading development teams.

- Full-Stack (Python + Vue.js) Software Engineer with a background in digital marketing; - Core Python, Flask & Django Frameworks, reusable code - RESTful APIs - MVC, SOLID, DRY principles; - SQL, Django ORM, Elastic Search Platform - Upper-intermediate English; - Available ASAP

* Software Engineer with 4+ years of full-stack development experience, specializing in utilizing modern web technologies like React, Next.js, and Node.js. * Holds a Bachelor's degree in Computer Science from Al-Azhar University, demonstrating a strong foundation in key theoretical principles, including Computer Graphics and Artificial Intelligence. * Proven track record at Awtar Tech, including leading a Front-end team to successfully migrate a static site to a dynamic platform, significantly improving user engagement. * Demonstrates expertise in front-end development and web app design, complemented by experience in architecting database systems and developing CRM solutions. * Engaged in freelance work, providing tailored web design and development using HTML, CSS, JavaScript, and Figma, indicating a capacity to handle diverse client requirements. * Proficient in multiple programming languages and frameworks with a focus on JavaScript, React, And Next.js, underpinned by practical experience with cloud deployments on platforms like Heroku and Netlify.

- Python Software Engineer with more than 4+ years of experience in software development - Proven ability to design and build telegram chatbots from scratch, implementing functionalities like search algorithms (CV parsing), voice recording, and payment processing integrations (Stripe, Liqpay). - Has experience integrating GPT with telegram bots - Expertise in database management (PostgreSQL, SQL Alchemy) and data security. - Implemented continuous integration and deployment practices (Jenkins, Docker) for streamlined deployments. - Excellent knowledge of common software engineering practices, like OOP principles, modern design patterns, test-driven development, continuous integration, and continuous deployment

- 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

● 9 years of Ruby on Rails development ● Extensive knowledge in web and mobile development lifecycle ● Skilled in agile and waterfall project management methodologies, SCRUM experience ● Accountable, communicable, dedicated team player, self-motivated, conscientious, creative individual, well-experienced in troubleshooting, able to learn quickly and effectively ● Upper-Intermediate English ● Computer Systems Analyst (Master's degree)

-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.

- Available to work in the EST. - 7 years of commercial experience with .NET - 3+ years of commercial experience with Typescript and Angular - 3+ years of experience with PHP - 12 years of commercial experience with XSLT and XML - Converting JATS XML files to HTML using XSLT transformation - Сonverting XHTML to HTML5 and including SVG tags instead of IMG tags - Сonverting JATS XML to IDML - Converting XML files to HTML - Upper-Intermediate English - Available ASAP

- Senior Data Engineer with 10+ of experience specializing in designing, optimizing, and maintaining data infrastructures, data flow automation, and algorithm development. - Has expertise in Python, SQL/NoSQL, ETL processes, PySpark, Apache Airflow, and an array of AWS services, complemented by a strong foundation in database systems and cloud-based solutions. Proven capability in handling large-scale data analytics and processing with a focus on performance and cost efficiency in cloud environments. Proficient in developing robust ETL pipelines, performing data migrations, and optimizing complex queries and storage procedures, leveraging extensive experience across multiple industries and platforms. - Start: ASAP - English: Upper-Intermediate

Software Engineer with over 5 years of experience specializing in Java-based development for web applications. Expertise in Angular 8, Spring Boot, MVC, Hibernate, JPA, and crafting seamless REST APIs. Proven track record in handling full SDLC, from analysis to maintenance, with a focus on continuous integration, unit/system testing, and robust code refactoring. Possesses a solid foundation in databases, including proficiency in MySQL and Oracle, and a command of front-end technologies such as JavaScript, Bootstrap, and HTML/CSS. Adept at utilizing development tools like Eclipse, ensuring efficient project progression. Skilled in application servers like Apache Tomcat and comfortable across various OS including Windows and Ubuntu. Accomplished in developing scalable solutions for e-commerce, demonstrated through the successful integration and management of ERP systems with various platforms and extensive work with Oracle E-Business Suite iStore modules.

The engineer brings a robust 8-year professional journey in UI/UX design and development, championing user experience with a comprehensive toolkit of design software, including Sketch, Figma, and Adobe Creative Suite, paired with proficiency in front-end technologies such as HTML5, CSS3, JavaScript, and Vue.Their technical acumen is evidenced by successful project leadership at Tridhya Tech, along with prior strategic roles at CENTRIC WEB SOLUTION and OMMUNE IT SOLUTION. A pattern of ongoing user research and a commitment to user-centered solutions underscore their approach, while their background includes tantalizing glimpses into cross-industry versatility, from IT solutions to engineering with LARSEN & TOUBRO.This candidate's blend of creative mastery, user empathy, and technical skill makes them an ideal candidate for catalyzing both meticulous detail work and visionary product development.

Software engineer with 8+ years of experience specializing in backend and full-stack development, demonstrating solid expertise in PHP (Laravel, Symfony), Java (Spring Framework), and front-end technologies like Vue.js. Holds a proven track record in designing and optimizing databases, creating scalable web applications, and leading development teams. Exposure to Docker, Kubernetes, and AWS infrastructure with a history of improving system performance and automating workflows. Holder of Full Stack Engineer Certificate with strong foundations confirmed by an Upper Second Class Degree in Software from the University of Zimbabwe. Noteworthy achievements include a fintech backend handling 10,000+ API calls per minute and an award-winning e-learning platform.

- Software Engineer with over 8 years of experience in software development. - Upper-intermediate English. - Available ASAP

- I am looking for opportunities to continue to develop as a software engineer. - I have 10 years of practical experience with web applications development. I plan to use my strong skills, knowledge, and programming experience to improve existing and create new high-quality software. - Intermediate English

- 5+ years experience in PHP and Web development. - Has a strong background in PHP development, particularly with the Laravel framework - Proficient in PHP, Laravel, HTML, CSS, JavaScript, jQuery, Silex, and MySQL - Previously, has experience as Symfony, Drupal Engineer - Upper-Intermediate English