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With over 9 years of experience as a Senior Software Engineer, I specialize in building scalable software solutions using React, Next.js, TypeScript, and GraphQL. My expertise extends to TanStack for state management and Tailwind for responsive design. I am proficient in implementing Framer for interactive components and integrating NextAuth OIDC for secure authentication. I have a proven track record in dashboard development, UI/UX design, and ensuring compliance with WCAG AA accessibility standards, alongside optimizing for PWA performance. I excel at leading cross-functional teams and mentoring junior engineers while consistently delivering impactful projects that enhance user experience and drive technical excellence.…With over 9 years of experience as a Senior Software Engineer, I specialize in building scalable software solutions using React, Next.js, TypeScript, and GraphQL. My expertise extends to TanStack for state management and Tailwind for responsive design. I am proficient in implementing Framer for interactive components and integrating NextAuth OIDC for secure authentication. I have a proven track record in dashboard development, UI/UX design, and ensuring compliance with WCAG AA accessibility standards, alongside optimizing for PWA performance. I excel at leading cross-functional teams and mentoring junior engineers while consistently delivering impactful projects that enhance user experience and drive technical excellence.

Andrzej Ito

Full Stack Developer, Front-End Developer, Back-End Developer, +2

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With over 9 years of experience as a Senior Software Engineer, I specialize in building scalable software solutions using React, Next.js, TypeScript, and GraphQL. My expertise extends to TanStack for state management and Tailwind for responsive design. I am proficient in implementing Framer for interactive components and integrating NextAuth OIDC for secure authentication. I have a proven track record in dashboard development, UI/UX design, and ensuring compliance with WCAG AA accessibility standards, alongside optimizing for PWA performance. I excel at leading cross-functional teams and mentoring junior engineers while consistently delivering impactful projects that enhance user experience and drive technical excellence.…With over 9 years of experience as a Senior Software Engineer, I specialize in building scalable software solutions using React, Next.js, TypeScript, and GraphQL. My expertise extends to TanStack for state management and Tailwind for responsive design. I am proficient in implementing Framer for interactive components and integrating NextAuth OIDC for secure authentication. I have a proven track record in dashboard development, UI/UX design, and ensuring compliance with WCAG AA accessibility standards, alongside optimizing for PWA performance. I excel at leading cross-functional teams and mentoring junior engineers while consistently delivering impactful projects that enhance user experience and drive technical excellence.

Available to hire

With over 9 years of experience as a Senior Software Engineer, I specialize in building scalable software solutions using React, Next.js, TypeScript, and GraphQL. My expertise extends to TanStack for state management and Tailwind for responsive design.

I am proficient in implementing Framer for interactive components and integrating NextAuth OIDC for secure authentication. I have a proven track record in dashboard development, UI/UX design, and ensuring compliance with WCAG AA accessibility standards, alongside optimizing for PWA performance. I excel at leading cross-functional teams and mentoring junior engineers while consistently delivering impactful projects that enhance user experience and drive technical excellence.

Skills

Experience Level

Expert

Expert

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Expert

Expert

Expert

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Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Developer at Allegro.pl

August 1, 2023 - November 6, 2025

Led key services in Java cloud-based applications with a focus on Microservices Architecture and REST API design for resilience and scalability. Designed and implemented a Hybrid Single Page Application using Java, Spring Boot, React 17, and Redux 4.2.1 to improve user experience and operational efficiency. Enhanced UI interactions by integrating React Observable with Redux, React Router, and Redux-Thunk for robust state management. Built accessible dashboards with a UI/UX focus using React HOC and Flux/Redux to ensure WCAG AA compliance. Worked with Angular 14, HTML5, CSS, and Bootstrap to create interactive pages that meet customer engagement metrics. Gained hands-on experience with Core Java (multithreading, concurrency, I/O, generics, data structures) to improve backend performance. Managed Node.js and MongoDB deployments and dependencies in staging. Optimized databases (Oracle, MySQL, MS SQL, PostgreSQL) achieving ~30% throughput improvements. Automated Docker image deployment in

Full Stack Developer at Paypay Corporation

July 1, 2023 - July 1, 2023

Developed responsive UI with React, Next.js, and Tailwind to enhance user experience while ensuring WCAG AA compliance. Implemented complex TypeScript-based state management across components. Collaborated on GraphQL integration for optimized data fetching, boosting dashboard performance by ~30%. Engineered progressive web applications (PWAs) with performance optimizations that improved loading times by ~40%. Designed and developed interactive dashboards using ChartJS to improve data visualization and user engagement. Ensured accessibility by adhering to UI/UX best practices and integrated NextAuth OIDC for secure authentication. Employed Framer for rapid prototyping and testing of UI designs and developed reusable components and custom hooks to increase code reuse by ~25%. Maintained cross-browser and cross-device compatibility and applied modern JavaScript, HTML5, and CSS3 practices.

Full Stack Developer at Fujitsu Ltd

April 1, 2017 - April 1, 2017

Developed scalable web applications using React, Next.js, and TypeScript, enhancing performance by ~30%. Implemented GraphQL for efficient data fetching, reducing API call response time to ~200ms. Designed and developed responsive dashboards ensuring WCAG AA accessibility. Optimized PWAs to reduce load times by ~40%. Created user-centric UI/UX designs and leveraged Tailwind CSS and Framer for visuals and animations. Integrated NextAuth OIDC for secure authentication and collaborated with cross-functional teams to maintain accessibility standards throughout the development lifecycle. Used modern tooling and Git workflows to maintain a clean, scalable codebase.