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Hi, I'm Sylwia Grzegorczyk, a Full Stack Engineer with 5 years of experience in React and PHP/C#, specializing in system design and clean code architecture. I'm a proactive problem-solver who leverages AI-assisted development and performance optimization to deliver enterprise-grade applications. I enjoy collaborating with remote teams and continuously learning new technologies to improve solutions.…Hi, I'm Sylwia Grzegorczyk, a Full Stack Engineer with 5 years of experience in React and PHP/C#, specializing in system design and clean code architecture. I'm a proactive problem-solver who leverages AI-assisted development and performance optimization to deliver enterprise-grade applications. I enjoy collaborating with remote teams and continuously learning new technologies to improve solutions.

Sylwia Grzegorczyk

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

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Hi, I'm Sylwia Grzegorczyk, a Full Stack Engineer with 5 years of experience in React and PHP/C#, specializing in system design and clean code architecture. I'm a proactive problem-solver who leverages AI-assisted development and performance optimization to deliver enterprise-grade applications. I enjoy collaborating with remote teams and continuously learning new technologies to improve solutions.…Hi, I'm Sylwia Grzegorczyk, a Full Stack Engineer with 5 years of experience in React and PHP/C#, specializing in system design and clean code architecture. I'm a proactive problem-solver who leverages AI-assisted development and performance optimization to deliver enterprise-grade applications. I enjoy collaborating with remote teams and continuously learning new technologies to improve solutions.

Available to hire

Hi, I’m Sylwia Grzegorczyk, a Full Stack Engineer with 5 years of experience in React and PHP/C#, specializing in system design and clean code architecture.

I’m a proactive problem-solver who leverages AI-assisted development and performance optimization to deliver enterprise-grade applications. I enjoy collaborating with remote teams and continuously learning new technologies to improve solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Polish

Fluent

English

Advanced

Spanish; Castilian

Beginner

Work Experience

Full Stack Engineer at Self-employed

October 1, 2024 - Present

Full-stack solution implementation across frontend and backend, including system components to meet client requirements. Expanded and optimized existing web applications by adding new functionalities and improving performance. Debugged, troubleshooted, and refactored code to enhance maintainability and stability. Built scalable, responsive interfaces with React.js, TypeScript, and SASS; improved backend efficiency, API integrations, and database performance. Guided clients on technical requirements, proposed optimal solutions, and supported remote teams in feature implementation. Conducted system testing, resolved issues, and maintained application stability. Authored and updated technical documentation and ensured smooth deployment and integration of features.

Full Stack Engineer at Softarchitect

August 1, 2021 - September 1, 2024

Developed and maintained front-end and back-end web components using HTML, CSS, JavaScript, PHP, and SQL. Designed and implemented scalable features in collaboration with cross-functional teams. Wrote optimized, clean code for performance improvements. Created responsive user interfaces and managed databases for smooth functionality. Developed APIs and ensured seamless data communication between client and server. Analyzed and transformed data to improve application logic and efficiency. Implemented secure authentication, including OAuth 2.0, JWT, and 2FA. Conducted code reviews, mentored teammates, tested and debbuged applications, and maintained regular client communications. Participated in system design and architecture planning to ensure scalability, reliability, and maintainability. Stayed updated on technologies and integrated them into workflows.