Frontend Developer

Building the Frontend of Modern Web

I create interfaces that look sharp, run fast, and scale without friction — from first sketch to final build.

Expert Solutions

Scalable design for modern apps

High-performance React frontends built with clean architecture, smooth motion, and detail-oriented design.

API Integration

Connect and integrate third-party services to enhance functionality and data exchange in your web app.

Meta Tags Optimization

Optimizing title tags, meta descriptions, and header tags with relevant keywords helps search engines understand your content and improves click-through rates.

Responsive Design

Ensuring the site is mobile-friendly and adapts to all screen sizes, which is a critical factor for SEO and user satisfaction.

Services

Creating fast, modern, and fully responsive web applications.

Converting

Transforming design files into clean, pixel-perfect web layouts.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Use Meaningful Variable Names

Choose descriptive variable names that clearly indicate their purpose. This improves readability, makes the code easier to understand for others (and your future self), and reduces the chance of logic errors.

Keep Functions Small and Focused

A function should do one thing and do it well. Keeping functions small not only improves readability, but also simplifies testing, debugging, and future refactoring.

Avoid Global Variables

Use local variables or encapsulate state within functions, modules, or classes. This prevents unintended side effects, reduces coupling, and improves code modularity.

Use Consistent Formatting

Follow a consistent code style—including indentation, spacing, and naming conventions—to make your codebase easier to navigate and collaborate on across teams.

Write Modular Code

Break your code into small, reusable modules or components. Modular code improves maintainability, supports testing, and scales better as your project grows.

Use Comments Wisely

Write comments when necessary to explain complex or non-obvious logic. Avoid restating what the code clearly expresses, and aim for clarity and precision in your explanations.

Handle Errors Properly

Use try-catch blocks, validate inputs, and provide meaningful error messages. Proper error handling ensures your application behaves predictably and aids in debugging.

Optimize Loops and Conditions

Avoid unnecessary iterations, redundant checks, or inefficient structures. Aim for clarity without sacrificing performance, especially in large datasets or nested logic.

Avoid Hardcoding Values

Store configurable values in constants, environment variables, or configuration files. This enhances flexibility and eases updates across environments.

Use Version Control

Leverage Git or another version control system to track changes, collaborate with others, and maintain a clear history of your codebase over time.

Clean Code

Writing clean, scalable, and maintainable code built on modern standards.

Featured projects

Preview a few highlight projects

Swap in real case studies that show your range — from product builds to creative experiments.

Nocta UI

Nocta UI

Accessible React components library.

View project
ID Zero

ID Zero

Identity security consulting website.

View project
WebGL lab

Interactive shaders built with Three.js

Real-time shader studies exploring light, geometry, and motion with Three.js and GLSL.

Refractive shader surface

GLSL plane with Fresnel refraction and hue rotation.

Iridescent torus array

Extruded slices orbit with bloom and quaternion rotation.

Fluid vector distortion field

FBO simulation to warp color gradients via vector field.

Client Success

Collaboration that speaks for itself

I value clarity, technical transparency, and consistent communication — the result is software clients can rely on.

Working with this developer has significantly improved my digital presence. His attention to detail and creative approach exceeded my expectations.

Angelika Grzejdziak
Angelika GrzejdziakPersonal Trainer & Nutritionist

His technical expertise and creativity are exceptional. He didn't just meet our goals – he helped us see the project from a new perspective.

Łukasz Klugiewicz
Łukasz KlugiewiczLean Bulls Gym Co-Founder

His innovative approach to problem-solving and commitment to the project made a strong impression. The results speak for themselves.

Natalia Jasińska
Natalia JasińskaPersonal Trainer & Nutritionist

Working with Marek has been seamless and professional. His responsiveness and ability to deliver beyond expectations set him apart.

Ben Ashlin
Ben AshlinIdentity Security Consultant

Great collaboration and clear communication throughout. His input on design was invaluable, and the results exceeded expectations.

Arkadiusz Jasiński
Arkadiusz JasińskiHusarz Gym Co-Founder

Working with this developer has significantly improved my digital presence. His attention to detail and creative approach exceeded my expectations.

Angelika Grzejdziak
Angelika GrzejdziakPersonal Trainer & Nutritionist

His technical expertise and creativity are exceptional. He didn't just meet our goals – he helped us see the project from a new perspective.

Łukasz Klugiewicz
Łukasz KlugiewiczLean Bulls Gym Co-Founder

His innovative approach to problem-solving and commitment to the project made a strong impression. The results speak for themselves.

Natalia Jasińska
Natalia JasińskaPersonal Trainer & Nutritionist

Working with Marek has been seamless and professional. His responsiveness and ability to deliver beyond expectations set him apart.

Ben Ashlin
Ben AshlinIdentity Security Consultant

Great collaboration and clear communication throughout. His input on design was invaluable, and the results exceeded expectations.

Arkadiusz Jasiński
Arkadiusz JasińskiHusarz Gym Co-Founder
Common Questions

Behind the build — technical insights

Learn more about my workflow, tools, and approach to frontend development — or reach out to talk tech directly.

Field Notes

Practical notes on shipping frontends

Notes from building immersive front-end experiences—performance tricks, design systems, and lessons from the field.

Get in touch

Let’s start a project together

Share a bit about your idea, product, or challenge. I’ll get back within two business days with next steps.