Upstaff Developer Profile Directory

Software engineer with 9 years of professional experience specializing in front-end development and React Native. Expert in building robust mobile apps and web applications using technologies such as ReactJS, NextJS, Redux, GraphQL, and Firebase.

- Profound knowledge of HTML5/CSS3 including preprocessors, understanding of responsive web design, and proficiency with nactive JavaScript & Frameworks. - Previously worked for Samsung, Hyundai, Mitsubishi as a technical engineer - Upper- intermediate English - Available ASAP

- He is a full-stack developer with over 8 years of experience, specializing in front-end development. - His expertise spans a wide range of modern technologies, including leading frameworks like React, Vue, and Angular on the front end, and Express, Nest, and Meteor with MongoDB on the backend. - For the past 5 years, his primary focus has been on creating seamless user interfaces using React. He brings extensive experience in implementing data-driven chart dashboards, designing front-end architecture, and actively participating in various product phases as required.

I’m Victor, and I am a front-end web developer with one year experience. I mostly specialize in JavaScript, TypeScript, React.js, Ant Design, HTML, CSS, SCSS, Redux. Knowledge of these technologies allowed me to successfully complete multiple projects. I am friendly, independent, and easily can find common ground with team members, so I have no problem with teamwork. I am an open-minded person, and always ready to learn from more experienced colleagues. If you want a reliable and easy-going team member, then let me help you. Working with me, you will receive an individual approach to your project, attention to detail and daily progress reports.

A highly skilled software engineer with expertise in JavaScript, TypeScript, Node.js, React.js, and a range of databases including SQL (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis). Demonstrates proficiency in HTML, CSS, and responsive design, as well as advanced ORM tools (TypeORM, Prisma) and API development (REST, GraphQL). Adept at state management using Redux, MobX, and has experience with Docker for containerization. Showcases a strong background in computer science, evidenced by work on complex projects such as a global sports streaming platform and an online casino network, revealing a deep understanding of modern web technologies and best practices. Excels in collaborative environments, where they have led teams towards the successful delivery of products meeting stringent performance and reliability standards.

- Experienced Front-End Developer with 4 years of background in front-end development, building scalable, high-performance web applications. - Experienced in React, Angular, and TypeScript state management (Redux Toolkit, RxJS), API integration (GraphQL, REST), and performance optimization for enhanced user experience. - Skilled in designing responsive UIs (Material-UI, SCSS) and implementing secure authentication systems (JWT, role-based access control). - Adept at performance optimization, reusable component development, and real-time data visualization. - Strong collaborative mindset, working closely with UI/UX designers, backend teams, and stakeholders to deliver seamless and efficient front-end solutions.

- Engineer with 3+ years full-stack development expertise specializing in interactive web applications. - Strong proficiency in JavaScript/TypeScript, React/Next.js, Node.js/Express.js, MongoDB, MySQL, AWS S3, and CI/CD with GitHub Actions. - Practical experience with cloud services, responsive design, real-time communication, and AI-powered tools evident from diverse projects. - Degree in Computer Science reflecting solid theoretical underpinnings complemented by an Engineering BTEC. Practical application of knowledge demonstrated in various roles. - Diverse portfolio including AI-powered tools, multimedia processing applications, and e-commerce platforms showcases in-depth understanding of SDLC and modern software practices - Adept in team collaboration, problem-solving, and mentoring, with a keen eye for database optimization and system efficiency.

- I`m a skilled Front-end Developer with 3 years of commercial experience, I delivered a diverse range of successful projects most of them developed from stage planning architecture to production ready. - My biggest achievements include rewriting an old legacy project that was used by hundreds of thousands of users worldwide, into the most modern technology stack available at the time, developing high-performing web applications with intuitive user interfaces, and optimizing website SEO performance to improve Google search ranking. - I possess excellent communication, a keen eye for detail, and a passion for staying up-to-date with emerging technologies in the field. - Upper-Intermediate English

- Developing web applications using JavaScript, React and Flux architecture - Strong experience in development highly loaded systems - Project deployment - Modular, scalable and reusable code - Supervising the subordinates various technologies - Good logical thinking and team player - Analytical thinking - Communicative and team player - Intermediate English - Availability starting from ASAP

- Software Engineer with 5+ years of experience in full-stack software development. - Proficient in JavaScript (Angular, React/Redux, Node.js), TypeScript, React Native/Flutter, Objective-C, Java, WebRTC, HTML5/CSS3, Docker, and AWS. - Skilled in developing project architecture, algorithms, and models based on customer requirements. - Experienced in debugging and maintaining source code using specialized tools. - Strong understanding of all stages of the software development process. - Master's degree in Controlling and Automation Systems from Odessa National Polytechnic University. - Worked on various projects including web and mobile app development, online document processing service, mobile application for football fans, web application for mind mapping, and e-commerce mobile app. - Proficient in technologies such as Angular, TypeScript, Node, Flutter, React.js, MongoDB, XDocReport, Apache PDFBox, JSON, HTML5, XML, CSS, JavaScript (Ext.js/Redux/Redux-Saga, Node.js/Express.js), MongoDB, React Native, Api-Sauce, React-Navigation, Redux, Lodash.js, Firebase Cloud Messaging, Facebook login, AWS RDS (MariaDB), WebRTC, Git, Docker, Jenkins, and Redmine.

Yurii T. is a senior full-stack developer with 8 years of experience in software development and business. He has a strong background in computer science and is proficient in HTML5, CSS3 with SCSS, JavaScript ES6+, and TypeScript. Yurii has expertise in various frameworks and technologies such as Node.js, Koa.js, Nest.js, React.js, Redux-Saga, MongoDB, PostgreSQL, MySQL, Docker, Docker Swarm, Kubernetes, AWS, GCP, Azure, GitLab CI, Jenkins, CIRCLECI, AngularJS, Angular 2+, and Ionic.He has worked on several projects, including Teroxx, where he developed an all-in-one cryptocurrency wallet app with features like registration, secure asset storage, coin-tracking, real-time transfers, and more. Yurii also contributed to the development of an internal cargo management system for an Italian logistic company, a comprehensive platform called Teamplate with chat, board, data room, calendar, and video call functionalities, and a delivery app called Lezzoo for ordering food, pharmacy items, groceries, and taxis.Yurii is experienced in using Apache Kafka, GRPC, Mocha.js, Jest.js, SNYK, Unit Tests, Twitter Bootstrap, Angular Material, React.js Material-UI, React Bootstrap, SASS, SCSS, LESS, Mongoose, Squelize, Typeorm, Gulp, Grunt, Webpack, MySQL, Oracle PLSQL, Redis, Elasticsearch, Memcached, and KSQL.He has also worked on projects like QueenCar, a ride-sharing app, Nimbla, a web app for invoice insurance, Shift, a delivery and transport marketplace, and The Hub, a community platform for creators.Yurii's technical skills, extensive experience, and proficiency in various programming languages, frameworks, and tools make him a standout candidate for software engineering positions. He has a strong understanding of software development methodologies, principles, paradigms, and patterns, and follows industry-standard software development practices.

4 years of experience in development using Javascript, Typescript, React, Redux, Mobx, HTML, Material UI, CSS, Eslint, Prettier, Axios, Git, Figma, Zeplin. Success-driven team player who continually meets and exceeds goals.

Software engineer with extensive experience in front-end development, including senior roles at AFEA Group and DAN.IT education. Proven track record in leading teams and teaching advanced JavaScript, evidenced by tenure as Senior Frontend Instructor. Holds a Bachelor of Computer Science with a notable GPA, underpinning a solid theoretical understanding of software engineering principles. Expertise in a broad technology stack including JavaScript (ES6, TypeScript, Three.js), React, Redux, and modern development tools (Webpack, Vite). Demonstrated ability to implement robust web solutions as seen in projects like an online QR code generator and a performance management platform. Proficiency in Agile/Scrum, SDLC, and Continuous Integration/Continuous Deployment (CI/CD) methodologies, enhancing project efficiency and deliverable quality.

- 3+ years of experience in Software development - Commercial experience with Node.js and Firebase - Extensive knowledge and experience in E-commerce (Shopify, Shopify Apps, Bigcommerce), Javascript development, debugging, and performance improvement. -Intermediate English

- 4+ years of commercial experience in IT - Experience in developing web applications using JavaScript (React, Redux) and TypeScript, CSS styling - New functionality development - Working with complex tasks and projects - Good logical thinking and team player, high level of responsibility, eager to learn new technologies - Modular, scalable and reusable code - Have a passion to work, proactive, self-managed, hard-working, result-oriented. - Good attention to details - Intermediate English. - Availability starting from ASAP.

Blockchain Developer | Web3 Engineer | Smart Contract Specialist Experienced Blockchain Developer with a deep understanding of decentralized applications (dApps), smart contracts, and blockchain architecture. Skilled in Ethereum, Solana, and Binance Smart Chain (BSC), with expertise in Solidity, Rust, and Web3 integrations. Passionate about building scalable, secure, and efficient blockchain solutions that drive innovation in DeFi, NFTs, and enterprise blockchain applications.Key Skills & Expertise: ✅ Blockchain Development: Smart contracts, tokenomics, DeFi protocols, NFT marketplaces ✅ Smart Contract Programming: Solidity, Rust, Move, Cairo ✅ Fullstack Web3 Development: Node.js, React, Next.js, Nest.js, Web3.js, Ethers.js ✅ Blockchain Frameworks: Ethereum, Solana, BSC, Polygon, Hyperledger ✅ Security & Auditing: Smart contract security, cryptography, vulnerability mitigation ✅ Infrastructure & DevOps: IPFS, The Graph, Oracles, Infura, Alchemy, Hardhat, Truffle ✅ Consensus & Protocols: Proof of Work (PoW), Proof of Stake (PoS), Layer 2 scaling

Accomplished Senior Web & Mobile App Developer with a robust educational foundation, holding a Bachelor of Science in Computer Science from the University of California, Berkeley. Possesses extensive experience with a tenure from July 2020 to August 2023 at Tech Innovators Inc., where contributions led to a 30% increase in user engagement for a million-user cross-platform app. A tenure as a Full-Stack Developer at Creative Solutions Ltd. from June 2016 to February 2020 resulted in a marked 25% client satisfaction increase. Expertise in a broad spectrum of technologies including WordPress, Shopify, PHP, React.js, Node.js, Android, React Native, and cloud platforms like Google Cloud and AWS. Strong ability in web scrapping, API integration, and database optimization. Proven track record in leading projects, mentoring teams, and fostering a culture of continuous improvement.

I am a high-energy, proactive Java developer with 4 years of hands-on experience in Java technologies. Throughout my career, I have worked on multiple projects, contributing to the development of scalable, efficient, and high-quality software solutions. I thrive in team environments, placing strong emphasis on collaboration and communication with teammates, cross-functional development teams, Product Owners, and Group Managers.My area of expertise includes but is not limited to:Java & Spring Ecosystem: Spring Boot, Spring Security, Spring Data Databases: PostgreSQL, MongoDB, MySQL Authentication & Security: Keycloak, JWT, OAuth2 Containerization & Deployment: Docker, Docker Compose Build & Migrations: Gradle, Flyway Testing & CI/CD: JUnit, TestContainers (learning CI/CD) Version controls: Git OS: Linux and Windows Rabbit MQ GraphQl

- 5 years of experience in designing, developing and managing complex sites with external integrations & internal structures - 3,5+ years of experience with React - 1,5+ years of experience with Angular - Upper-Intermediate English - Available from 02.08.2021

Software engineer with 8 years of experience, including specialization in React native, .Net development, and a strong background in the banking sector, HR, health, and biometric device integration. Proven track record in designing resilient cloud solutions with Microsoft Azure, and expertise in full SDLC, TDD, MVC, CQRS, and microservices architecture. Has developed scalable applications using C#, ASP.NET Core, React/React native, and Entity Framework, backed by a solid foundation in computer science with an MSc in Data Science and Business Analytics. Recognized for implementing efficient integrations with Central Bank systems and third-party APIs, enhancing financial technology ecosystems.

With several years of hands-on experience in the field, i exemplify a strong foundation in administrative duties, backed by a proven track record of effectively managing administrative aspects of projects. Notable achievements include successfully inducting a Project Portfolio Report for a professional exam. This individual has a deep understanding of handling confidential information. The ability to deliver tangible results when tasked with preparing official documents like minutes, bids, and tenders, further indicates proficiency in attention to detail and organizational skills.

- Full-stack Laravel developer with in-depth expertise in PHP, JavaScript, TypeScript, Laravel, Vue.js, and Nuxt.js. - Proven track record of building complex systems including a product comparison tool with web scraping and a hospital management system, demonstrating strong problem-solving skills. - Proficient in API integration, Laravel queue, jobs, scheduler, creating reusable components, and knowledge of AWS, Git, and Firebase notifications. - Holds a Bachelor of Commerce and a Post Graduate Diploma in Computer Application, blending commerce acumen with technical prowess. - Experienced in working with OCR for financial processing and utilizing IP rotation for data scraping, indicating a strong grasp of modern development practices. - Speaks English, Gujarati, and Hindi fluently, bringing excellent communication skills to a multilingual team environment.

Highly skilled ReactJS and React Native developer with 5+ years of experience in crafting robust web and mobile applications. Strong background in mechanical engineering with a transition to software development, showcasing adaptability and a multifaceted skill set. Adept at leading projects, such as a significant migration to new web apps with React and real-time APIs using RabbitMQ, and creating survey tools with AI-powered analytics. Possesses hands-on expertise in React, Redux, Flutter, NextJS, NuxtJS, and modern frontend technologies, complemented by a track record of successful cross-functional collaboration. Contributed to multiple large-scale projects, notably enhancing customer experience through AI-powered social media insights. Successfully completed a frontend-focused education at ITI, underpinned by a BSc in Mechanical Engineering and professional certifications including PMP and JavaScript algorithm mastery.

- Motivated front-end developer with a focus on web development and a passion for security. - Bachelor's degree in Computer Engineering from Odessa National I.I. Mecnikov University. - Proficient in React, Redux, Next.js, JavaScript, HTML, CSS, SCSS, and MongoDB. - Experience in developing fully functional online music stores and information portals. - Skilled in managing development teams, planning meetings, and distributing tasks. - Strong understanding of software development methodologies, principles, and patterns. - Continuously expanding knowledge through additional education and certifications in web development and JavaScript.

Software engineer with a focus on WebGL and JavaScript, with a history of developing immersive 3D experiences and multiplayer games. Has led front-end and WebGL production code efforts and provided effective problem-solving to customer issues. Boasts a solid background with technologies such as PlayCanvas, ThreeJS, Phaser, ReactJS, NextJS, NodeJS, and TypeScript. Recognized for creating a backend for a web-based multiplayer game that enhanced user experience and for developing a game that won a Silver medal at a respected international conference. Fundamental understanding of software development life cycle, proficient in multiplayer frameworks like Colyseus and Photon, and competent in database management with MongoDB.

- Middle software developer with more than 3 years of experience of creating and maintaining web applications using React.js - Have a hands-on experience of both working as a single developer and being a part of Agile teams. - Have fluent english and good technical background

- 8+ years of experience with JavaScript (React, Node.js); - React, Redux and TypeScript for front-end and NodeJS (NestJS, Express, SocketIO, TCP Sockets) for back-end; - Upper-intermediate English; - Available ASAP

- 3+ years of work experience in IT - Experience with JavaScript, learned new technologies, like React, Redux, MobX, Saga, TypeScript - Intermediate English - Available ASAP

Accomplished software engineer with a Bachelor’s degree in information technologies and a demonstrated history of leading successful teams, driving innovation, and delivering impactful software solutions across diverse organizations. Key expertise includes sophisticated project management for systems such as GIS asset management platforms that boosted operational efficiency by 80%. A proven record in developing APIs, optimizing financial systems, and implementing IT infrastructure underpins a strong technical foundation in programming languages such as Java, Python, and JavaScript, and frameworks like Spring Boot, Laravel, and ReactJS. With over a decade of experience, the candidate has harnessed a broad array of technologies, from AWS cloud services to various database systems, and is aligned with expert practices including SCRUM, CMMI, and ITIL. Noteworthy achievements include a customized scholar system for 1300+ users and the pioneering admission tests platform for over 65,000 users, showcasing robust skills in engineering complex software architectures.

Full-stack developer with extensive 6+ years of experience in building robust web and mobile applications across diverse industries. Expertise in a spectrum of technologies including Java, JavaScript, Node.js, React, and database management with PostgreSQL, MySQL, MongoDB. Proven track record in front-end development with React, and back-end development with Django and Spring. Adept at DevOps practices with Docker and CI/CD pipelines. Recognized for improving product performance and UX, contributing to a significant increase in Customer Happiness Index. Strong problem-solving capabilities and commitment to delivering user-centric solutions, with a notable educational background in Software Engineering from Addis Ababa Institute of Technology.

- 3+ years of experience as a Sofware Engineer - Upper-intermediate English.

- 9+ years of professional expertise in the IT industry; - Rich experience in Frontend Development using (HTML5, CSS3, ES6,React, Angular, Angular JS, Node JS, React(fluent), Backbone(fluent), JQuery), strong technical background; - Experience with third-party services integration; - Experience in databases: MongoDB; - Experienced in software architecture performing; - Team Leading (Tech team); - Experienced in code reviewing and code refactoring - Available in 2 weeks after approval for the project