My Experience

• Multi-tenant architecture with white-label branding and role-based access (admin, support).
• Device assignment to companies and users based on shared article identifiers.
• Real-time device status monitoring and proxy tunneling with password decryption.
• Secure authentication with AAL2.
• Post-MVP: developed simulation module allowing granular access control per module, and support for project-based XLSX file uploads to run simulation workflows.

• Connect to the coffee machine via Bluetooth.
• Start and monitor the brewing process in real time, with live temperature and pressure data.
• Register accounts, rate purchased coffee beans, and manage multiple devices.

• Building the user flow for configuring and submitting electricity tariff orders.
• Integrating with external services for geolocation, real-time pricing, and internal simulation of energy rates.
• Supporting white-label theming and logic switching based on domain.
• Working within a large monorepo containing the main platform, CMS, and multiple web apps.

• Real-time stock updates via WebSockets and interactive chart visualizations.
• Notifications triggered by market events and stock activity.
• Dynamic UI for exploring financial KPIs and custom filtering.

Joined the project at an early stage. While implementing new features as part of a public-sector contract, I also led a parallel refactor to enhance code quality, modularity, and developer experience — ensuring long-term maintainability without interrupting delivery.

Led development across several cross-platform products while mentoring team members and contributing to internal open-source initiatives.

Cross-platform financial application built with NativeBase to unify mobile and web experiences. Developed shared UI components and business logic for consistent UX across platforms. Focused on security, performance, accessibility and domain-specific theming.

High-visual website combining blog, portfolio, and event calendar functionality. Worked closely with designers to implement pixel-perfect animations and transitions using LottieFiles. Focused on smooth UX and performance despite heavy visual demands.

Medical web application for ordering home diagnostic tests and accessing health results. Integrated with three distinct APIs. Focused on data security, reliable error handling around medical workflows. Special attention was paid to compliance and user privacy.

Teamdeck – a workforce management platform focused on team scheduling, time tracking, and reporting. Worked on modules for resource allocation, project calendars, timesheet logging, and automated report generation. Ensured smooth UX for both team members and managers, with focus on real-time updates and data consistency.

Open-source SaaS boilerplate – co-developed and maintained a production-ready SaaS starter kit for client and internal use. Integrated Stripe, implemented role-based authentication (including admin panel and login flow), set up internationalization support, and designed a modular architecture for rapid project bootstrapping.

Wellness mobile app integrating GPT for conversational meal planning, calendar sync, and email parsing. Built intuitive flows with AI-enhanced suggestions, and developed secure integration layers for third-party APIs (Google, Outlook, etc.).

As a Team Leader, I mentored developers through bi-weekly 1:1 sessions focused on personal growth, career path, and code quality. Participated in monthly leadership workshops on team communication, conflict resolution, and people-first management. Contributed to architectural decisions and ran internal frontend knowledge-sharing sessions.

Worked on two key applications focused on user control panels and ad tech, delivering rich UI experiences and configuration-driven workflows.

Web platform for managing user-owned electronic devices. Developed a dynamic admin panel with drag-and-drop functionality to configure electrical parameters such as phases, grid layout, and device dependencies. Focused on real-time visual feedback and user-friendly UX for complex technical setups.

Contributed to an advertising technology application for creating and managing marketing campaigns. Built intuitive interfaces for campaign setup, audience targeting, and analytics. Ensured flexible component structures and responsiveness across devices.

Worked closely with designers and backend teams to maintain a clean component architecture and implement business logic. Prioritized code clarity, state management, and performance optimization.

• Refactored an extensive monolithic codebase, modularizing legacy logic and gradually introducing React components without disrupting existing workflows.
• Rebuilt a drag-and-drop UI for configuring product layouts, improving performance, maintainability, and developer experience.
• Collaborated with designers and stakeholders to match existing behavior while enabling future extensibility.

• Built dynamic campaign creation flows with editable templates, asset uploads, and platform-specific settings.
• Integrated with external APIs for automated publishing to platforms like Facebook, Instagram, and YouTube.
• Designed dashboard views for tracking performance metrics such as reach, CTR, engagement, and ROI.
• Ensured seamless user experience with responsive UI and real-time feedback during publishing and syncing.

Worked on several social impact and education-focused web applications, delivering full-featured UIs and focusing on performance, usability, and maintainability.

FakeHunter – a browser extension and admin panel for crowdsourced fact-checking. Users could submit questionable information via a simple form capturing a screenshot and URL. Built the admin interface for reviewers to assess submissions, publish verdicts with source links, and manage the public-facing fact-checking portal. Focused on efficient UX for reviewers and data clarity for end users.

4F Pomaga – designed and developed a public-facing informational site for a charity campaign over a single weekend. Achieved a 100 Lighthouse score across performance, accessibility, and best practices. Prioritized speed and mobile responsiveness.

Contributed to a dashboard application for teachers and students to manage lessons, track events in a shared calendar, and coordinate educational initiatives. Focused on multi-role access, clear information hierarchy, and flexible content management tools.

Running my own software development business, delivering tailored web solutions for clients across various industries.

Developed custom e-commerce platforms, corporate websites, blogs, and booking systems with SMS notifications.

Built a lightweight CRM system for managing the rental of cosmetic laser equipment, including inventory management and customer tracking.

Delivered SEO-optimized websites with high Lighthouse scores, fast loading times, and mobile responsiveness.

Provided full-cycle support: scoping, development, deployment, hosting, and maintenance.

Worked directly with clients, Delivered translating business needs into functional requirements.

Worked on the development of custom e-commerce platforms tailored for the Polish market. Delivered fully customized online stores with features such as dynamic product configuration, payment integrations, and order tracking. Collaborated with clients to implement business-specific logic, calculations, and SEO improvements. Involved in both frontend and backend development, as well as deployment and maintenance.

This experience laid the foundation for my transition into self-employment, where I continued developing similar solutions under my own brand IMaxart