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Custom Web Application

Perfect choice if you need fully personalized online solutions. Are you in need of advanced features, integration with external systems, automation or custom modules or scripts? You're covered. Contact me!

# Custom Web Application

What is a custom web application and why might you need one?

A Dedicated Web Application is a customized platform coded based on modern technologies and unique code, so that it responds perfectly to your business needs. It can be a powerful booking management platform, LMS, e-commerce, a complex CRM system, as well as a custom bots or scripts that integrates with external services (REST API / GraphQL). These types of tools allow you to automate daily tasks, increase the efficiency of your team and stand out from the competition.

Aplikacja MERN  Stack

Why might you need this?
You want your project to be exceptional in its quality. You want to have full control over its functions and layout, and you don't settle for off-the-shelf solutions. It may also be a fit for you if your company provides unconventional processes, requiring multi-dimensional integrations or custom modules, such as a personalized product creator or an educational platform with an unprecedented formula.

Why should we differentiate between “dedicated” and “ready‑to-use” applications?

  • CUSTOM
    – Custom - Fully built from scratch (e.g., using PHP/Node.js + Next.js (React)), These are solutions where you can freely add modifications or advanced integrations. It supports online payments, AI chatbots. The code is 100% tailored to the company's requirements, and its development is virtually unlimited.
  • READY-MADE
    – SaaS platforms or universal CMS may seem cheaper and faster at the start, but with more complex requirements they prove insufficient and difficult to expand or integrate with new modules. Experience also suggests mentioning that such solutions need continuous support and maintenance, which can be costly in the long run.

# Business benefits of having a web application

  1. Unlimited customization The code is created for a specific project, which allows you to implement functions that you actually need: No matter what you aim for - advanced integrations or author algorithms, a web application has no limits to meet that requirement.

  2. Automation and Cost Reduction Dedicated applications can implement complex processes - such as. scripts for automatic order processing, integrations with payment systems or report generation. Thus, they save your team time and minimize the risk of errors.

  3. Complete Integrations Connect your application to services such as Jira, Discord, shipping systems or cloud analytics or a dedicated company system. Automate the transfer of data between different platforms, and your clients and employees will get a problematic flow of information.

  4. Full Control and Security With automated code, you have the assurance that every solution has been tested and optimally secured. You can also make any changes to the code without worrying about licensing restrictions.

  5. Market differentiation Companies using template solutions often present similar functionality and design. Dedicated software, on the other hand, is a chance to create something unique that will attract the attention of your audience and highlight your brand.

  6. Scalability Without Borders As your business grows, your application can grow with it, adding new modules (e.g., an e-commerce module in the next stages) or handling larger workloads. Cloud solutions (AWS, Vercel, Cloudflare) provide dynamic infrastructure expansion.

Aplikacja do rezerwacji wizyt Aplikacja Next.js

# Key features of the web application

  • Performance
    – designed for high operational efficiency (React, Next.js, Node.js, SSR/SSG) and load speed testing.
  • Accessibility
    – responsive (mobile-first) layout and attention to usability (UX), so every user can quickly find needed information.
  • Security
    – encrypted connections (HTTPS), regular updates, security audits, attack prevention (WAF).
  • Interactivity
    – dynamic screens, smooth animations (e.g., Framer Motion), and even bots interacting with clients in real-time.
  • Easy Maintenance and Development
    – version control in GitHub/GitLab, automated deployments (CI/CD), end-to-end (E2E) testing.
  • SEO Optimization
    – clean code, meta tag generation, integration with Google Tag Manager and Google Analytics.
  • Usability
    – intuitive admin panels, even with very advanced features (e.g., order management system or HR panel).
  • Reliability
    – performance testing, real-time monitoring (e.g., Sentry, Datadog), and quick response to potential errors.
  • Affordability
    – flexible pricing model, adapted to your capabilities and development plans (possible to start with MVP).
  • Mobile Device Optimization
    Figma and interface design created with various screens in mind (smartphones, tablets, laptops).
  • Integration with Any System
    – ERP, CRM, marketing automation, payment systems. Including REST API / GraphQL usage.
  • Responsiveness
    – application that scales correctly across different browsers and systems.

# Types and Development/Expansion Possibilities of web app

# E-commerce application

Dedicated online store with unique interface, integrations with ERP/CRM systems, automatic reports and advanced features. Expansion possibilities: payment systems, integrations with wholesalers, automatic invoice generation, loyalty systems.

# Booking system

Dedicated platform for booking services, integrated with payment systems, CRM and automatic notifications. Expansion possibilities: integration with Google calendars, automatic SMS/e-mail reminders, loyalty systems.

# Any Front-End

Dedicated front-end to existing system, integrated with database and payment systems. Extensibility: integration with ERP/CRM systems, automatic report generation, charts, authorizations, user roles.

# CRM / B2B System

Custom software for collecting and processing customer data, integrations with other accounting systems, ability to create offers and bulk orders.
Expansion possibilities: invoice module, reports, live chat, personalized permissions for different company roles.

# Educational Platforms / LMS

Online course management, training registration system, certificates, and knowledge tests.
Expansion possibilities: webinar integration, e-store, automatic notifications about new courses.

# Advanced Integrations and Scripts

Bots for automated customer service, integrations with public databases, web scrapers for collecting data from other sites.
Development possibilities: training bots with artificial intelligence, automatic document creation.

# Internal Corporate Applications

Project management system, HR tools, internal communicator, integrated with company infrastructure.
Expansion possibilities: PDF report generation, Office 365 integration, multi-company / multi-department.

# Custom Industry Solutions

For companies that need specific functions, e.g., a yacht booking platform, intelligent renovation planning system, or real estate offer aggregator.
Development possibilities: advanced search, maps with geolocation, creation of dedicated scripts.

Aplikacja React

# Technologies and Tools

  • JavaScript / TypeScript / Node.js - languages and environments that provide flexible development of front-end and back-end parts.
  • PHP (Laravel, Symfony) - for more complex applications that require advanced business logic aand database integration.
  • Next.js (React) - dynamic interface, SSR/SSG, easy implementations and great performance.
  • Tailwind CSS - fast and responsive UI design that can be easily customized to meet project requirements.
  • React Native - for mobile apps that require a native look and feel on Android and iOS.
  • Vite / Gatsby - for static applications that require fast loading and SEO optimization.
  • Docker - containerization and environment independence, easy cloud deployments (AWS / Vercel / Cloudflare).
  • MongoDB / PostgreSQL - databases tailored to the scale of the project and the nature of the data.
  • Git / GitHub / GitLab - code versioning, CI/CD, instant patch deployments.
  • Figma - responsive layout design and UI/UX prototyping.
  • OpenAI / ChatGPT - possible integration with NLP models to create bots, automate customer quote handling.
  • REST API / GraphQL - flexible interfaces to connect applications with other services (warehouse, CRM, payment systems).

Grow your business with an FullStack Dev from Poland

Looking for comprehensive Web Software services, high-conversion online store, or modern web application? Use the contact form and get in touch directly with a skilled Full Stack Developer from Poland.

# Example Implementations / Use Cases of web app

  1. E-commerce application with over 3,000,000 products.
    The largest catalog of spare parts for maintenance. E-commerce application written using modern technologies (TypeScript, Node.js, Next.js, Gitlab, Docker) that connects with the clients backend. Catalog of over 3,000,000 products. Database of over 10,000 manufacturers.

    Adres strony: aserto.pl

Largest catalog of spare parts for maintenance
Largest catalog of spare parts for maintenance
Largest catalog of spare parts for maintenance
  1. Custom Next.js application with calculators
    Next.js application in the form of a website, with tools for dietary calculations for dogs in the form of calculators. Integration through GraphQL with WordPress for blog and dynamic content. Project under development, maintained and administered, with many plans for the future.

    Adres strony: piessyty.pl

Website for dog dietitian with calculators
Calorie calculator for dogs on a mobile device

# Collaboration Process / Methodology

  1. Contact and Needs Analysis Meeting (online) to identify key requirements, develop initial module concepts and integration options. We also establish business priorities: what to implement first, and what can wait for later phases. When needed, we precede the project with a UX study and interface design. For complex projects, we recommend prepare specifications, and for smaller projects, a short brief to establish the scope of work and MVP approach is sufficient.

    • How much does a dynamic website cost? Get a quote: click here!.
    • Get a quote for another type of website, store or dedicated application: Click here!.
    • Make an online appointment (Workshop, Site or Store Audit, Consultation, SEO Analysis): Click here!.
  2. UI/UX Design

    Shadcn w twojej aplikacji z TailwindCSS

    I prepare mockups and prototypes in Figma, which are then tested for usability. We work with you to determine what the homepage, specific sub-pages and UX paths should look like. Mobile-first design with responsiveness and accessibility in mind.

    • Prototype - visualization of the user interface (UI) and user experience (UX).
    • Design system - a set of principles and components for creating consistent interfaces.
    • Interactive prototypes - enable testing of functionality before implementation.
    • Utility tests - studies that help understand how users use the application and what can be improved.
    • Feedback collection - analyze user feedback and make improvements.
  3. Architecture and Configuration Depending on the complexity - this stage can take from 2 weeks (simple MVP) to several months (complex application with multiple integrations). You get a constant overview of the progress of the work to make sure that the application is developed according to your guidelines. We also schedule meetings and milestones.

  4. Implementation & Testing I implement the application on the production environment, perform functional and performance testing. We also set a schedule for acceptance testing (UAT) and training for your team. Together we also establish a data migration plan, if required.

    • Functional tests - verify that the application works as required.
    • Performance tests - assess how the application handles heavy loads.
    • Security tests - identify potential vulnerabilities in the application's security.
    • Acceptance tests - verify that the application meets customer expectations and is ready for deployment.
  5. Maintenance and Development I provide post-implementation care, continuous updates, support for security, troubleshooting or expansion with new modules (e.g., reporting, additional integrations, automatic notification sending and even integration with AI services). Together we establish a SLA and maintenance plan.

Timeline A project with basic functionalities (MVP) can be ready in a few weeks, while more advanced systems (with additional integrations, proprietary scripts) can take several months. It all depends on the priorities set and the detailed schedule we prepare together. For Outsourcing work, we recommend prepare a contract for a specific period of time or with a quality guarantee.

Explore also: Dynamic Website, Static Website.

Need a classic or modern online store? Check out: Online Shop.

JavaScript
React
TypeScript
Node.js
Next.js
REST API
GraphQL
Docker
MongoDB
PostgreSQL
Vite
SASS
HTML5
CSS3
JavaScript
React
TypeScript
Node.js
Next.js
REST API
GraphQL
Docker
MongoDB
PostgreSQL
Vite
SASS
HTML5
CSS3
Git
Github
Gitlab
Vercel
OpenAI
AWS
Cloudflare
WooCommerce
Strapi
Figma
Stripe
Google Tag Manager
Google Analytics
Google Ads
Git
Github
Gitlab
Vercel
OpenAI
AWS
Cloudflare
WooCommerce
Strapi
Figma
Stripe
Google Tag Manager
Google Analytics
Google Ads

Check my area of expertise below

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