Andrzej Gębuś

✉️ andrzejgebuss@gmail.com

Experience

Independent Project (B2B SaaS / EdTech)

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Lead Fullstack Engineer

02.2026 - Present

Solo architecture & development of a multi-tenant platform for language schools

  • Engineered a full-scale B2B SaaS platform from the ground up with tailored workflows for school admins, teachers, and students, leveraging React 19, TypeScript, and TanStack Router & Query
  • Implemented strict tenant data isolation and fine-grained RBAC using Supabase (PostgreSQL) with Row-Level Security (RLS) policies
  • Built end-to-end subscription & billing lifecycle via Stripe (Checkout, Customer Portal, Webhooks, Invoicing) using Supabase Edge Functions
  • Built an advanced operations suite: group and student management, dynamic teacher availability scheduling, attendance tracking, educational material sharing, and reporting of billable hours and school metrics
  • Established automated testing pipeline with Playwright for critical E2E user/payment journeys and Vitest for RLS security and unit verification

Spirax Sarco

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Frontend Engineer

06.2025 - 02.2026

Creating IoT Platform for UK's primary manufacturer of steam management systems

  • PWA for monitoring and managing industrial process assets (steam traps, hose pumps, heat exchangers) for Spirax Sarco
  • Unified asset monitoring and management by aggregating data from multiple independent IoT data collection systems
  • Built collaboratively by distributed teams across the US, UK, Poland, and Spain
  • Delivered sprint demo presentations to stakeholders at the end of each two-week sprint
  • Comprehensive test setup using Vitest and MSW (Mock Service Worker) for isolated API mocking and integration testing

Roche

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Frontend Engineer

09.2024 - 06.2025

AEM Development for Global Pharmaceutical Sites

  • Designed and developed custom reusable templates and components in Adobe Experience Manager based on legacy websites
  • Built content-driven websites for one of the world's leading healthcare companies targeted at healthcare professionals
  • Ensured strong authoring experience by creating editor-friendly and maintainable content structures
  • Ensured accessibility and responsiveness across all major platforms
  • Designed and implemented custom scripts to support and extend website functionality

OPGK Software S.A.

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Frontend Developer (React)

11.2022 - 09.2024

React Development for New SaaS Projects

🔸 Cloud ITSM & Service Management Platform

  • Developed a cloud-based ITSM platform from scratch, based on a legacy on-premise solution
  • Built a highly customizable ticket management system with flexible configuration options
  • Implemented advanced role-based access control (RBAC)
  • Designed and supported multiple application modes (customer, agent, admin)
  • Adapted and extended existing solutions to meet product requirements (e.g. email handling, custom calendar implementations, extending libraries)

🔸 B2B E-commerce Platform for Garden Equipment Distributor

  • Developed a B2B e-commerce platform, including both customer-facing application and internal admin panel
  • Collaborated closely with designers and implemented UI based on Figma designs
  • Implemented advanced RBAC for different user roles
  • Built CMS-like features for managing products, categories, promotions, and content

🔸 Internal Log & Remote Ops System

  • Developed an internal application using Next.js for server operations and monitoring
  • Built support for dynamically defined, multi-type data structures
  • Delivered tooling for remote operations and log management
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Frontend Developer (AngularJS)

05.2022 - 11.2022

AngularJS Development for Commercial Ticketing System (Mint Service Desk)

  • Maintained and extended a custom-built ITSM/ticketing system based on AngularJS (Mint Service Desk)
  • Developed new features and enhanced existing modules for service management workflows
  • Built custom dashboards and data visualizations to support operational insights
  • Contributed to system stability, debugging, and ongoing improvements
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Frontend Developer (JavaScript / DojoJS)

11.2021 - 05.2022

GIS Web App Development with ESRI & DojoJS

  • Developed a GIS application using DojoJS within the ArcGIS Web AppBuilder ecosystem
  • Integrated Esri Maps API and external government APIs for geospatial data access and reverse geocoding
  • Delivered custom widgets and tools for geospatial data visualization and analysis
  • Built interactive, data-driven user interfaces for reporting and visualizing data on a map