Available to hire
Hi, I’m Arthur Niewiarowski, a detail-oriented AI-focused Full Stack Developer with over 10 years of experience in designing, developing, and maintaining responsive web applications. I’m proficient in front-end and back-end technologies such as HTML, CSS, JavaScript, React, Vue, Angular, Svelte, and Node.js. I value web standards, UX/UI principles, and cross-browser compatibility, and I enjoy collaborating with cross-functional teams to deliver user-friendly websites.
I aim to write clean, efficient code and optimize performance. I have a proven track record of troubleshooting complex issues to improve user experience. I thrive in Agile environments, aligning software solutions with business goals and delivering high-quality work.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Work Experience
Full Stack Developer at IdeaMaker
March 31, 2025 - July 10, 2025Led a team of 5 developers in an agile environment to reduce project turnaround time and boost productivity. Built the Wordwelder website using Django for backend and React for frontend, integrating OpenAI API (GPT-4 model) and Stripe for payment. Developed Assessiv.com, an online testing platform, using ASP.NET and React with role-based authentication and secure backend APIs. Built web and mobile apps including healthcare platforms with React Native and AI chatbots using Python and NLP. Actively contributed to Agile practices such as PI planning, JIRA task tracking, and code reviews.
Full-Stack Developer at Freelancing
September 30, 2023 - July 10, 2025Developed a baby photo album web app using Laravel, React, and PostgreSQL with features such as photo tagging and user authentication. Built the Advance CPE multi-tenant platform with Django and Vue, supporting course management, role-based access, and dynamic frontend design. Improved deployment pipelines with GitHub Actions and Jenkins and collaborated in Agile environments using JIRA.
Full-Stack Developer at Green Rabbit Game
August 31, 2021 - July 10, 2025Developed the blockchain-based game Green Rabbit using microservices on AWS, reducing server costs by 50%. Built front-end UI components with Svelte, TypeScript, and Tailwind, and backend RESTful APIs using Spring Boot. Developed an ecommerce platform with Vue and Spring Boot integrating secure authentication, payment systems (Stripe, PayPal), and third-party APIs. Participated in code reviews to ensure high-quality code and reduce bugs.
Junior Full Stack Developer at HigherEchelon
December 31, 2019 - July 10, 2025Developed healthcare applications with React.js, Redux, TypeScript, and Express.js, including features like API integrations, payment processing, and report generation. Collaborated with UX/UI teams to deliver responsive, SEO-optimized interfaces with improved page load times. Built hotel and warehouse management systems using Django, Vue.js, and MERN stack. Also developed financial management systems with Ruby on Rails and React.
Junior Full Stack Developer at ITOLOGY
November 30, 2017 - July 10, 2025Built APIs using PHP frameworks like Laravel and Django, and contributed to ecommerce, financial applications, and mobile microservices. Developed CMS themes and plugins and SPAs using Angular and jQuery. Converted static designs into responsive pages and handled cross-browser debugging. Developed several single page applications with React, Angular, and Vue.
Full Stack Developer at IdeaMaker
March 31, 2025 - July 10, 2025Led a team of 5 developers in an agile environment to decrease project turnaround time and boost productivity. Built the wordwelder website using Django backend and React frontend integrating OpenAI API (GPT-4). Developed UI components using React, TypeScript, and Tailwind CSS and managed state with Redux. Built backend APIs with Django REST Framework using PostgreSQL as the database. Integrated Stripe for secure payments. Built assessiv.com, an online testing platform using ASP.NET backend and React frontend with modular components, JWT-based authentication and detailed analytics. Developed healthcare mobile applications with React Native and AI chatbots with Python and NLP. Actively participated in Agile practices including PI Planning, JIRA task tracking, and code reviews.
Full-Stack Developer at Freelancing
September 30, 2023 - July 10, 2025Developed a baby photo album web application using Laravel backend, React frontend, and PostgreSQL database including features like photo tagging, album organization, and user authentication. Built a multi-tenant advance CPE website using Django with schema-based multi-tenancy and Vue 3 frontend including role-based access control. Introduced dynamic externalized configuration for CPRS and contributed to CI/CD pipelines using GitHub Actions and Jenkins fostering Agile collaboration.
Full-Stack Developer at Green Rabbit Game
August 31, 2021 - July 10, 2025Developed 'Green Rabbit', a blockchain-based NFT game on WAX blockchain. Architected microservices on AWS improving scalability and reducing server costs by 50%. Built UI with Svelte, TypeScript, Tailwind and backend APIs with Spring Boot. Developed an eCommerce platform with Vue frontend and Spring Boot backend including secure authentication and payment integration. Participated in code reviews, improving code quality and reducing bugs by 25%.
Junior Full Stack Developer at HigherEchelon
December 31, 2019 - July 10, 2025Developed healthcare applications using React, Redux, TypeScript, and Express.js including third-party API integrations, location search, and payment features (Stripe, PayPal). Worked closely with UX/UI designers for responsive interfaces optimized for SEO and performance improvements. Implemented CI/CD pipelines with GitLab and Jenkins. Developed hotel management system (MERN stack) and warehouse management system (Django backend, Vue frontend). Built a Ruby on Rails financial management system with React frontend.
Junior Full Stack Developer at ITOLOGY
November 30, 2017 - July 10, 2025Built APIs using PHP and frameworks like Laravel, Django, Next.js, and Spring Boot for eCommerce, financial apps, and mobile microservices. Developed CMS themes and plugins for WordPress, OpenCart, and CraftCMS. Supported SPAs using Angular and jQuery. Converted static designs into responsive web pages and assisted in debugging cross-browser compatibility issues. Developed multiple single page applications using React, Angular, and Vue.
Full Stack Developer at IdeaMaker
March 31, 2025 - July 10, 2025Led a team of 5 developers in an agile environment to improve project turnaround time and team productivity. Built the Wordwelder AI message generation platform using Django backend and React frontend, integrating OpenAI GPT-4 API, Redux for state management, PostgreSQL database, and Stripe API for payments. Developed assessiv.com, an online testing and assessment platform, with ASP.NET backend and React frontend, enabling secure role-based access, dynamic test creation, and analytics reporting. Developed various web and mobile applications including healthcare platforms and AI chatbots. Contributed actively to Agile practices like PI Planning, JIRA task tracking, and code reviews.
Full-Stack Developer at Freelancing
September 30, 2023 - July 10, 2025Developed a baby photo albums web app using Laravel, React, and PostgreSQL focusing on responsive UI and secure scalable backend. Created Advance CPE multi-tenant system with Django backend and Vue frontend, with robust role-based access control and dynamic course management. Implemented dynamic externalized configuration and utilized Agile tools such as Jira, GitHub Actions, and Jenkins for continuous integration and deployment.
Full-Stack Developer at Green Rabbit Game
August 31, 2021 - July 10, 2025Developed a blockchain-based game on the WAX blockchain using microservices on AWS to improve scalability and reduce costs. Built UI components with Svelte, TypeScript, and Tailwind CSS, and backend RESTful APIs with Spring Boot. Developed an ecommerce platform using Vue frontend and Spring backend, integrating secure authentication, payment processing, and third-party APIs like Stripe and PayPal. Participated in code reviews improving code quality and reducing bugs.
Junior Full Stack Developer at HigherEchelon
December 31, 2019 - July 10, 2025Developed healthcare applications using React.js, Redux, TypeScript, and Express.js with features like third-party API integration, payment systems, auto report generation, and portfolio management. Collaborated with UX/UI teams to optimize interfaces for SEO and performance, achieving significant page load reductions. Contributed to hotel and warehouse management systems using Django, Vue.js, and the MERN stack, and built a Ruby on Rails financial management system with React frontend.
Junior Full Stack Developer at ITOLOGY
November 30, 2017 - July 10, 2025Built APIs with PHP and frameworks like Laravel for ecommerce and financial applications, including mobile app microservices using Django, Next.js, and Spring Boot. Developed CMS themes and plugins for WordPress, OpenCart, and CraftCMS. Created responsive SPAs using Angular and jQuery, converting static designs into interactive responsive web pages, and troubleshooting cross-browser compatibility. Developed single page applications using React, Angular, and Vue.
Full Stack Developer at IdeaMaker
March 31, 2025 - July 10, 2025Led a team of 5 developers in an agile environment, reducing project turnaround time and boosting productivity. Developed the Wordwelder AI message generation platform integrating OpenAI's GPT-4, with React, TypeScript, Tailwind CSS, Redux, Django REST Framework, PostgreSQL, and Stripe API for payment processing. Built Assessiv.com, an online testing and assessment platform, with ASP.NET backend and React frontend, including modular test creation tools, secure role-based authentication, and implemented unit/integration testing. Developed various web and mobile applications including healthcare platforms with React Native and AI chatbots using Python NLP. Actively participated in Agile processes, code reviews, and task tracking to ensure timely, high-quality deliveries.
Full-Stack Developer at Freelancing
September 30, 2023 - July 10, 2025Developed a responsive baby photo album web application using Laravel, React, and PostgreSQL with feature-rich functionalities like photo tagging and album organization. Created the Advance CPE multi-tenant website using Django backend and Vue 3 frontend with schema-based multi-tenancy, dynamic course creation features, and robust role-based access controls. Improved deployment and integration processes by implementing Jira, GitHub Actions, and Jenkins pipelines in an Agile environment.
Full-Stack Developer at Green Rabbit Game
August 31, 2021 - July 10, 2025Developed the blockchain-based game 'Green Rabbit' leveraging WAX blockchain and NFT technology. Architected a microservices infrastructure on AWS reducing server costs by 50%. Built front-end UI with Svelte, TypeScript, and Tailwind, and backend RESTful APIs with Spring Boot. Developed an ecommerce platform using Vue frontend and Spring backend with secure user authentication, third-party payment integration, and robust REST APIs. Participated in code reviews resulting in a 25% bug reduction.
Junior Full Stack Developer at HigherEchelon
December 31, 2019 - July 10, 2025Developed healthcare applications leveraging React.js/Redux/TypeScript and Express.js. Designed dynamic, browser-compatible UI components and integrated third-party APIs for data aggregation and payments via Stripe and PayPal. Collaborated with UX/UI designers for pixel-perfect responsive designs optimized for SEO and speed, achieving top Google Lighthouse scores. Reduced page load times by 40% and deployment times by 70% using CI/CD pipelines with GitLab and Jenkins. Contributed to hotel and warehouse management systems using Django, Vue.js, and MERN stack, as well as a Ruby on Rails financial management system with React frontend.
Junior Full Stack Developer at ITOLOGY
November 30, 2017 - July 10, 2025Developed APIs using PHP and frameworks like Laravel for e-commerce and financial applications. Built microservices for mobile apps with Django, Next.js, and Spring Boot. Developed CMS themes and plugins for WordPress, OpenCart, and CraftCMS. Supported SPA development with Angular and jQuery, converted static designs into responsive webpages, and resolved cross-browser compatibility issues. Created single-page applications using React, Angular, and Vue. Focused on frontend technologies including HTML, CSS, JavaScript ES6+, jQuery, and Ext.js.
Full Stack Developer at IdeaMaker
March 31, 2025 - July 10, 2025Led a team of 5 developers in an agile environment, decreasing project turnaround time and boosting team productivity. Built the Wordwelder website using Django and React, integrating the OpenAI API for AI message generation. Developed UI components with React, TypeScript, and Tailwind CSS, managing state using Redux. Implemented backend APIs with Django REST framework and PostgreSQL. Integrated Stripe API for secure payment processing. Developed assessiv.com, an online testing and assessment platform, using ASP.NET backend and React frontend, with role-based authentication and JWT tokens for security. Contributed to development of healthcare applications with React Native and AI chatbots using Python and NLP. Participated actively in Agile practices including PI Planning, task tracking with Jira, and code reviews to ensure timely delivery.
Full-Stack Developer at Freelancing
September 30, 2023 - July 10, 2025Developed a web application for baby photo albums using Laravel, React, and PostgreSQL, creating interactive and responsive user interfaces and designing secure, scalable backends. Developed Advance CPE multi-tenant system using Django and Vue with a schema-based backend approach and dynamic frontend components. Implemented robust role-based access control systems. Introduced dynamic externalized configuration and collaborated in Agile environments. Implemented CI/CD pipelines using Jira, GitHub Actions, and Jenkins.
Full-Stack Developer at Green Rabbit Game
August 31, 2021 - July 10, 2025Developed 'Green Rabbit', a blockchain-based game utilizing NFTs on the WAX blockchain. Architected microservices infrastructure on AWS, improving scalability and reducing server costs by 50%. Built front-end UI components using Svelte, TypeScript, and Tailwind CSS. Created backend RESTful APIs with Spring Boot and implemented unit tests using Mocha, Chai, JUnit, and Jest. Developed an e-commerce platform with Vue frontend and Spring Boot backend, integrating payment systems (Stripe, PayPal) and security via Spring Security. Participated in code reviews, improving code quality and reducing bugs by 25%.
Junior Full Stack Developer at HigherEchelon
December 31, 2019 - July 10, 2025Developed healthcare applications using React.js, Redux, TypeScript, and Express.js, including features like third-party API integrations, location search, payment processing (Stripe, PayPal), and reporting tools. Collaborated with UX/UI designers for responsive, SEO-optimized interfaces. Improved website performance and deployment processes with CI/CD pipelines and GitLab/Jenkins integration. Worked on Hotel Management and Warehouse Management systems using Django, Vue.js, and the MERN stack. Developed a financial management system using Ruby on Rails and React.
Junior Full Stack Developer at ITOLOGY
November 30, 2017 - July 10, 2025Built APIs using PHP and frameworks like Laravel for eCommerce and financial applications, as well as microservices for mobile apps using Django, Next.js, and Spring Boot. Developed CMS themes and plugins for WordPress, OpenCart, and CraftCMS. Supported SPA development using Angular and jQuery. Converted static designs into responsive web pages adhering to modern web standards. Assisted in debugging and troubleshooting across browser compatibility issues and developed single page applications using React, Angular, and Vue.
Senior Full Stack Developer at Navigate360
September 1, 2025 - September 17, 2025Led a team of seven developers in an agile environment, enhancing productivity and reducing project turnaround time. Architected and developed a microservices AI-powered proposal generation platform using React, Node.js, Express.js, and Kubernetes, integrating OpenAI models to optimize government proposal writing. Implemented a high-performance Nest.js backend, improved system speed by 30%. Optimized database queries and added Redis caching, reducing API response times by 40%. Mentored team in Agile and DevOps best practices, increasing sprint velocity by 35%. Implemented serverless solutions on AWS Lambda, reducing infra costs by 30%. Enhanced performance for high-traffic platform and UI/UX improvements.
Full-Stack Developer at Freelance / Remote Projects
September 1, 2023 - September 17, 2025Developed BabyPage, a photo album generator for milestones, using React Native and Nest.js. Built scalable web/mobile applications with Express.js and React, Styled Components, and TypeScript, delivering responsive user experiences. Implemented RabbitMQ for messaging, built a custom analytics dashboard using D3.js and React. Ensured 508 compliance, mentored junior developers, and maintained high code quality via unit tests (Jest, Mocha, Chai). Introduced dynamic externalized configuration for CPRS, enabling updates without code changes; collaborated in Agile environments and set up Jira, GitHub Actions, and Jenkins pipelines for CI/CD.
Full-Stack Developer at Intervene K12
August 1, 2021 - September 17, 2025Developed 'Green Rabbit', a blockchain-based game leveraging NFTs on the WAX blockchain. Architected and implemented a microservices infrastructure on AWS to improve scalability and reduce server costs by 50%. Built front-end UI components using Svelte, TypeScript, and Tailwind. Implemented Backend RESTful APIs with Express.js. Participated in code reviews and best practices, contributing to a 25% reduction in bugs.
Junior Full Stack Developer at HigerEchelon Inc
December 1, 2019 - September 17, 2025Worked on the government web application VA.gov using React, TypeScript, and Node.js. Designed dynamic, browser-compatible components, integrated third-party APIs, and implemented payments (Stripe, PayPal). Built an auto report generator and collaborated with UX/UI teams to optimize SEO and page speed, achieving a 40% reduction in page load times. Streamlined deployments with CI/CD pipelines.
Junior Full Stack Developer at TYPENT
November 1, 2017 - September 17, 2025Built RESTful APIs using PHP and frameworks (Laravel, Symfony, Zend). Developed CMS themes and plugins (WordPress, OpenCart). Ensured backend performance through code reviews and debugging. Supported SPA development with Angular and jQuery. Translated static designs into interactive, responsive pages, ensuring cross-browser compatibility and SEO-friendly, fast-loading experiences.
Senior Full Stack Developer at Navigate360
September 1, 2025 - September 17, 2025Led a team of seven developers in an Agile environment, driving productivity and faster delivery. Architected and developed a microservices AI-powered proposal generation platform using React, Node.js, Express.js, and Kubernetes, integrating OpenAI models to optimize government proposal writing. Built a high-performance Nest.js backend to improve system speed by about 30%. Optimized database access and caching with Redis, reducing API response times by 40%. Mentored teammates on Agile and DevOps practices, increasing sprint velocity. Implemented serverless components on AWS Lambda to cut infrastructure costs by 30%. Enhanced performance for high-traffic workloads through advanced Redis configurations and UI/UX refinements, boosting customer satisfaction. Pioneered troubleshooting methodologies to shorten issue resolution times and improve overall reliability.
Full-Stack Developer at Freelancing
September 1, 2023 - September 17, 2025Developed BabyPage, a scalable photo album generator based on milestones, using React Native and Nest.js. Built dynamic, mobile-friendly applications with Express.js and React, Styled Components, and TypeScript, delivering responsive, engaging user experiences. Implemented RabbitMQ for message queuing and built a custom analytics dashboard with D3.js, React, and GridStack for interactive insights. Ensured 508 compliance, mentored junior developers, and maintained code quality with Jest, Mocha, and Chai. Introduced dynamic externalized configuration for CPRS to enable updates without code changes. Practiced Agile, and set up Jira, GitHub Actions pipelines, and Jenkins for continuous integration and deployment.
Full-Stack Developer at Intervene K12
August 1, 2021 - September 17, 2025Developed 'Green Rabbit', a blockchain-based game on the WAX blockchain utilizing NFTs. Architected AWS-based microservices to improve scalability and reduce server costs by 50%. Built front-end UI with Svelte, TypeScript, and Tailwind. Created RESTful APIs on the back-end using Express.js. Participated in code reviews, enforced best practices, and helped reduce bugs by 25%.
Junior Full Stack Developer at HigerEchelon Inc
December 1, 2019 - September 17, 2025Contributed to the VA.gov government web application using React, TypeScript, and Node.js. Implemented dynamic, browser-compatible components; integrated 3rd-party APIs, payments (Stripe, PayPal), auto-report generator, and portfolio manager. Collaborated with UX/UI designers to deliver pixel-perfect, responsive interfaces optimized for SEO and page speed, achieving strong Lighthouse scores. Improved performance with a 40% reduction in page load times and streamlined deployments with CI/CD pipelines, reducing deployment time by 70%.
Junior Full Stack Developer at TYPENT
November 1, 2017 - September 17, 2025Built RESTful APIs with PHP and frameworks (Laravel, Symfony, Zend). Developed CMS themes and plugins (WordPress, OpenCart). Ensured backend performance via code reviews and debugging. Supported SPAs using Angular and jQuery; translated static designs into interactive, responsive pages; ensured cross-browser compatibility.
Education
Bachelor’s Degree at DeVry University
January 1, 2007 - December 31, 2013Bachelor’s Degree at DeVry University
January 1, 2007 - December 31, 2013Bachelor’s Degree at DeVry University
January 1, 2007 - December 31, 2013Bachelor’s Degree at DeVry University
January 1, 2007 - December 31, 2013Bachelor’s Degree at DeVry University
January 1, 2007 - December 31, 2013Bachelor's Degree in Computer Science at Devry University
January 11, 2030 - January 1, 2011Bachelor’s Degree in Computer Science at Devry University
January 11, 2030 - January 1, 2011Qualifications
Industry Experience
Software & Internet, Healthcare, Gaming, Financial Services, Education, Government, Professional Services, Other
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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