Upstaff Developer Profile Directory

Software engineer with a robust background in full-stack development and proven expertise in Java and Python. Demonstrated success in architecting and implementing high-transaction APIs with low latency in Java/Spring Boot, and optimizing ETL pipelines using Python/Airflow. Experience includes substantial cost reductions and performance enhancements in cloud environments, AI-driven application development, and leading large-scale software migrations and modernization projects. Holds a master's degree in Computer Science and possesses advanced certifications from prominent institutions, encompassing Java, AWS, and Docker, accompanied by a strong foundation in Agile methodologies.

Software Engineer with 4+ years of experience specializing in Electronics and Communication Engineering, with a solid background in AI/ML, automation, and efficient database management. Known for developing an AI Interviewer Bot at Infosys and enhancing system performance at Accenture, including a 98% reduction in manual workload through Python scripting. Skilled in Python, PL/SQL, C#, and cloud technologies, with expertise in building REST APIs and deploying machine learning models. Recognized for leading a migration from Jenkins to GitHub Actions, optimizing batch processing by 75%, and holding certifications such as GCP Associate Cloud Engineer. With a B.Tech in Electronics and Communication, complemented by a Nanodegree in Programming for Data Science, this engineer stands out with a blend of technical prowess and innovative problem-solving abilities.

- Ruby on Rails Developer with over 10 years of progressive experience, specializing in architecting and developing scalable web applications across diverse industries including healthcare, legal services, finance, and e-commerce. - Demonstrated expertise in leading development teams of up to 10 members while maintaining optimal workflow and fostering knowledge sharing. - Proven track record in designing and implementing complex technical solutions for multi-platform applications serving US, Canadian, and European markets. - Proficient in full-stack development with strong capabilities in Ruby on Rails, React JS, GraphQL, REST APIs, and various database technologies including MySQL and MongoDB. - Experienced in agile methodologies with a focus on test-driven development, code quality, and documentation maintenance. - Adept at requirements analysis, task estimation, and project planning to ensure timely delivery of high-quality software products.

- Senior Software Developer & Architect with 14+ years of experience designing scalable software solutions, leading teams, and optimizing system performance. - Expertise in Ruby, JavaScript, and cloud-based architectures (AWS, DigitalOcean, Docker). - Specializing in e-commerce platforms, payment systems integration, microservices architecture, search optimization, and IoT device integration, including video streaming and motion detection algorithms. - Passionate about architecting high-performance applications, integrating IoT solutions, AI technologies, and leading cross-functional engineering teams to drive innovation and scalability.

- 10+ years of experience in the IT industry as a Ruby on Rails Engineer - Demonstrated expertise in full-stack development, contributing to projects across the entire software development lifecycle, from planning and architecture to implementation and optimization. - 5+ years of experience as a DevOps engineer: Preparing AWS /Hetzner environment for application clusters, Creation scripts to automate application cluster infrastructure, Creation/configuration via Terraform, Dockerizing applications - 1 year of experience as a Team Lead: mentoring, training, coordination of jun devs and co-workers, Handling client requirements, Resolving problems and issues on the project

Software Quality Assurance Engineer with expertise in manual and automated testing, including Selenium, Postman, and Cypress. Proficient in Agile Scrum methodology, technical communication, and various testing forms such as functional, regression, and exploratory testing. Holds an Engineering degree and multiple certifications, including SCRUM MASTER and AGILE JIRA. Well-versed in SDLC, software management, and engineering practices, with hands-on experience in diverse projects and freelance testing communities. Recognized for analytical thinking, problem-solving abilities, and a strong commitment to ensuring software quality.

- Data Scientist with 4+ years of experience in AI and machine learning; - Specialized in NLP, time series forecasting, and generative AI; - Built RAG systems using OpenAI, Langchain, and custom pipelines; - Developed multi-agent systems for sales enablement, education, and virtual assistants; - Proficient in Python, SQL, and ML libraries like Pandas, Sklearn, Keras, and PyTorch; - Created legal assistants with HuggingFace models and citation-based RAG responses; - Built voice-based chatbots using OpenAI Whisper and ElevenLabs for voice cloning and audio processing; - Designed pipelines for text-to-speech and image generation in mobile and cloud environments; - Extracted and analyzed financial data using AWS Textract and OpenAI VLMs; - Built production-ready support bots using Dialogflow CX, Twilio, and Google Firestore; - Experienced with AWS and GCP for scalable model deployment.

- Accomplished IT & Cloud Consultant with over 12 years of diversified experience in IT Infrastructure, hybrid cloud technologies, and storage solutions. - Proficient in Linux-based systems, Red Hat OpenShift, Ansible automation, and implementing effective CI/CD pipelines, with a solid grasp of cloud platforms such as AWS, Azure, and GCP. - Demonstrated expertise in leading large-scale migrations, ensuring resilient and scalable infrastructure through proactive management and optimization of computing resources. - Holds an array of industry-recognized certifications, including OCI, RHCE, and DELL EMC Avamar, underscoring a commitment to professionalism and continuous learning. - Strong foundation in practical applications of UNIX/Linux, VMware, Microsoft solutions, backup/recovery practices, and cloud-native monitoring tools. - Combines deep technical skills with methodological IT operations management to develop automated, efficient, and compliant system environments.

- Data Scientist with a focus on Natural Language Processing and 16 years of experience in the IT industry; - Experienced in designing cloud-based architectures using BigQuery, Vertex AI, Cloud Functions, Datastore, and Cloud Storage; - Applies machine learning and deep learning techniques to solve problems in NLP, computer vision, and time series analysis; - Solid foundation in unsupervised learning methods, including clustering, anomaly detection, and recommender systems; - Skilled in full-cycle solution design, from requirements gathering to development and deployment; - Specialized in Generative AI, building advanced algorithms and models to address complex tasks using generative techniques; - Experience in ML model development for prediction, classification, and optimization use cases; - Proficient in Agentic AI, creating autonomous systems powered by LLMs for decision-making and workflow automation; - Experienced in text-to-speech technologies and implementation; - Experience with cloud platforms, including AWS (S3, EC2, Lex, Lambda, EMR), Azure OpenAI, and Google Cloud; - Developed applications across macOS, Linux, and Windows environments; - Creative and results-driven, with strong analytical, communication, and presentation skills.

An experienced software engineer with a solid background in AI and Machine Learning, specializing in data-driven solutions for large customer bases. Boasts advanced proficiency with languages and frameworks like Python, PySpark, TensorFlow, PyTorch, and expertise with Machine Learning Operations (MLOps) tools such as GitHub and Jenkins. The engineer has a proven track record of leading technical teams and managing stakeholder relationships in deploying end-to-end predictive models and ML solutions for key business applications in the telecommunication sector. The education credentials include a Ph.D. in Machine Learning Techniques and a M.Sc. in Automation Engineering from Politecnico di Milano, Italy, supplemented by a strong publication history that demonstrates ongoing contributions to the field.

- Cybersecurity specialist with 10+ years of extensive experience in securing cloud environments, applications, and infrastructure. - Specializes in GCP and AWS security, including secure architecture design, vulnerability management, and compliance-driven implementation (SOC2, ISO 27001). - Proficient in Python, PHP, JavaScript, TypeScript, and various security tools and methodologies, including DevSecOps, Kubernetes, and OWASP standards. - Experienced in leading cybersecurity teams, managing security programs, and ensuring compliance with standards like ISO 27001, SOC2, PCI, and GDPR. - Extensive experience in securing applications through threat modeling, secure SDLC, and implementing security controls across diverse technology stacks. - Skilled in securing cloud environments, managing SIEM systems, and conducting infrastructure security testing. - Fluent in English (C1), with intermediate Polish (B1+). - Holds ISO27001 Lead Implementer, AWS Certified Security - Specialty, Google Certified Cloud Security Engineer, and eMAPT certifications.

- Senior Full-Stack Developer with 12+ years of experience in software engineering; - Certified in .NET Microservices, Scrum Master, and Python Programming; - Skilled in building scalable web applications using .NET (Core, 6–9), C#, and ASP.NET; - Strong experience in microservices architecture, CQRS pattern, and RESTful API design; - Familiar with Vertical Slice architecture and Domain-Driven Design principles; - Proficient in front-end development with Vue.js, Angular, Kendo UI, and SASS; - Experience with modular frontend architecture using single-spa; - Hands-on experience with Microsoft Azure (App Service, Container Registry, Azure SQL); - Implemented CI/CD pipelines using Azure DevOps, Azure Pipelines, Git, and Kubernetes; - Worked with SQL Server, NoSQL databases, SignalR, WireMock.NET; - Familiar with Node.js and PHP for backend tasks and system integration.

Seasoned Front-end Engineer with over 6 years of experience and proficiency in cutting-edge technologies such as React, Redux, and Next.js. Specializes in React with TypeScript for building robust and maintainable applications.Skilled in engineering dynamic user interfaces, achieving significant performance optimizations and codebase enhancements. Pioneered comprehensive testing strategies to ensure high-quality software and maintain reliability across deployments.Demonstrates proven expertise in responsive design and cloud-based solutions, with recent mastery in Next.js 15 Server Components. Experienced in collaborating on international remote projects, consistently contributing to improved user engagement and overall software performance.Holds key certifications, including Next.js 15 & React and AWS Cloud Practitioner, reflecting a commitment to continuous learning and professional growth.Combines strong technical acumen with essential soft skills such as problem-solving, communication, and teamwork—making this engineer an excellent candidate for advanced Front-end roles.

- Experienced in React Native: Developed and delivered multiple React Native mobile applications, including a KenZen App and a Furniture Design Time-Tracking App, integrating Firebase, Redux, animations, and state management. Over 4.5 years of experience with React Native - Full-Stack Development in Fintech: Led fintech real estate app development, handling both front-end (ReactJS, Styled-Components) and back-end (NodeJS, MongoDB) while managing CI/CD pipelines and real-time updates. - Senior Developer in Web & Mobile Apps: Designed and implemented scalable mobile and web applications, ensuring high code quality, debugging, and managing releases on App Store and Play Market. - Developed e-commerce web solutions using Vue and Vuex, collaborating with back-end and QA teams, - Experienced in Docker, GitHub Actions, and Linux server management, optimizing deployment pipelines and application performance. - Intermediate English

Passionate Senior Software Engineer with 7 years of experience excels in building complex web applications leveraging mastery in languages such as JavaScript, TypeScript, C#, Go, and Python. Renowned for architecting a legal SaaS platform yielding a 40% operational efficiency boost and pioneering AI-powered chatbot integration, showcasing a 30% reduction in case handling efforts. Adept in cloud services (AWS, Azure, GCP), microservices, and CI/CD with an Agile mindset, drives collaboration and continuous improvement. Holds a solid foundation with a Bachelor's degree in Computer Science from NTUA, cementing technical prowess in the software industry through contributions to large-scale projects that enhance user experiences, performance, and reliability.

- Full-Stack Developer with 4+ years of experience in software engineering; - Skilled in building responsive UI using React, Next.js, TypeScript, Tailwind, and MUI; - Strong experience in Java and Spring Boot for back-end development; - Proficient in API development, integration, and optimization for performance; - Experienced with PostgreSQL, MySQL, and Oracle for database management; - Familiar with Node.js for scripting and backend tasks; - Hands-on experience with unit and integration testing using Jest, React Testing Library, and JUnit; - Solid understanding of SDLC, CI/CD, and application deployment processes.

DevSecOps Engineer with over a decade of expertise, specializing in compliance automation and cloud security hardening, underscored by a solid foundation in Computer Science and Software Engineering. Their technical prowess spans CSPM tools, security suite deployment, and vast experience with CI/CD pipelines and major cloud service providers (AWS, Azure, GCP). With proficiency in key programming/scripting languages such as Python, Bash, and PowerShell, they have effectively contributed to various domains, including Healthcare, Business, and EdTech, holding certifications like Azure Security and MS 365 Security. Their track record demonstrates implementing secure solutions, from SIEM enhancements to fortifying high-load NFT trading platforms. The engineer's ability to transform security practices, ensuring robustness and business continuity in fintech and healthcare, positions them as a competitive candidate poised for contributing significantly to prospective projects.

DevSecOps specialist and system administrator with a 7-year tenure, fusing expertise in secure infrastructure solutions with a security-focused approach to system administration. Key strengths include Docker containerization, Infrastructure as Code practices, and intensive security testing using tools like OWASP ZAP, Black Duck, and Coverity. Demonstrated aptitude in log management and real-time security event detection with Splunk. Technical proficiency spans a broad range of areas including network security, cryptography, and cloud platforms. The engineer's project history showcases successful roles across IoT, E-Commerce, and business domains, with substantial contributions to secure and compliance-heavy environments, while maintaining system reliability and performance.

- 5+ years of experience in IT - Upper-Intermediate English - Available ASAP

- 5+ years of commercial experience in IT - Experience in developing web applications using JavaScript (React, Redux) - Deep knowledge of HTML, CSS, TypeScript - New functionality development - Communicative, responsible, hardworking, result-oriented - Experience from simple sites to huge projects for companies - Good attention to details - Good logical thinking and team play - Intermediate+ English. - Availability starting from ASAP.

- Front-end developer with the overall experience in web engineering for over 3 years. - Intermediate English. - Available ASAP.

- Versatile React Native Developer with 5+ years of experience in delivering robust mobile applications, with a deep understanding of the React ecosystem and modern front-end development. - Holds a solid foundation in software engineering with a Bachelor's degree in Economics, specializing in Accounting and Audit, adding a strong analytical dimension to programming skills. - Proficient in an array of technologies including JavaScript, TypeScript, ReactJS, Redux, Expo, NodeJS with Express, and associated libraries and tools. - Demonstrated expertise in the full software development lifecycle (SDLC), object-oriented programming (OOP), Model-View-Controller (MVC) pattern, Test-Driven Development (TDD), and Behavior-Driven Development (BDD). - Adept in integrating payment solutions such as Stripe, engaging with APIs, and developing cross-platform applications that enhance user experience. Familiar with web development technologies like HTML5, CSS, and cloud services. - Contributed to diverse projects ranging from live nature cams, NFT galleries, healthcare, e-commerce, to social media marketing, demonstrating versatility and the ability to adapt to varied domains. - Team player with intermediate English communication skills, facilitating collaboration with global teams and ensuring alignment with project goals.

- React.js and React Native Expertise: Over 5 years of dedicated experience, showcasing proficiency in building mobile applications and admin panels. - Proficient in TypeScript: Demonstrated use of TypeScript across multiple projects, enhancing application scalability and maintainability. - Redux and Mobx for State Management: Extensive application of Redux and Mobx in project development, ensuring efficient state handling. - Diverse UI Frameworks Knowledge: Employed Material UI, Ant Design UI, and react-native-paper, reflecting versatility in user interface design. - GraphQL and REST APIs Integration: Integrated GraphQL and RESTful services for optimal data retrieval and management in applications. - Solid JavaScript ES6/ES7 Skills: Consistent use of modern JavaScript standards in development projects, forming the basis of his React Native work. - Experienced in Redux-saga and Redux-thunk: Utilized Redux-saga and Redux-thunk for managing complex asynchronous operations in various applications. - Upper-Intermediate English -Available ASAP

- 7+ years IT professional in front-end web development in the field of web-oriented applications for startups, midsize businesses, and large enterprises from various industries. - Expert in React. - Follow React updates. - Good knowledge of TypeScript and JavaScript. Have fully and deep understanding of UX/UI design implementation into HTML layout. - Experienced in different approaches, front-end engineering principles, and concepts. - Knowledge in functional programing, service-based fronted development, OOP based on prototypes, Unit testing (TDD). - Upper-intermediate English - Available ASAP

- 6+ years of experience in the IT industry - 5+ years of experience with Angular - 2 years working with Angular.JS 1.x - Fluent English - Available ASAP

- 6+ years of experience as a Front-End Engineer, specializing in web application development with Next.js, TypeScript, and JavaScript; - 3+ years of experience with React; - 2+ years of experience with Angular; - UI/UX: Expertise in building interactive and responsive user interfaces with Tailwind CSS, Material-UI, and Styled Components; - State Management: Proficient in Redux, Zustand, and React Context API; API Integration: Hands-on experience with REST API and GraphQL for data fetching and processing; - Testing: Writing unit and integration tests using Jest and React Testing Library; - Methodologies: Agile, Scrum, code reviews, and CI/CD processes; - Experience working on e-commerce, SaaS, and fintech projects within international teams; - Strong focus on performance optimization, user experience improvements, and close collaboration with backend developers.

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.