Stefan G. - Software Architecture and Development

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Heikendorf, Germany

Experience

May 2024 - Dec 2024

8 months

Software Architecture and Development

MediaMarktSaturn Retail Group

One of the largest e-commerce platforms in Europe with almost ten sales lines in various EU countries.
Technical environment: TypeScript, React, Styled Components, Apollo, GraphQL, Jest, Playwright, Git.

Apr 2022 - Sep 2023

1 year 6 months

Software Architecture and Development

Exaring AG

Waipu TV delights more than 5 million customers on multiple platforms and the web.
Introduction of a new booking system for entertainment packages.
Web player:
Support for the full lifecycle of a media SPA.
Feature development.
Bug fixing.
Maintenance.
TV package booking:
New or existing customer.
Upgrade or downgrade.
Existing or new payment method.
Kept functional through unit and UI tests.
Adjustments despite major changes to the codebase.
Cross-project error management system with Sentry in the monorepo.
Technical environment: JavaScript / TypeScript, React, Css-in-JS, Jest, WebdriverIO, Git.

Feb 2020 - Dec 2020

11 months

Consulting, Software Architecture and Development

north.io GmbH (EGEOS GmbH)

Development of modern web applications with a strong GIS focus.
Consulting, architecture, and development from a single source.
Development of a design system based on Material-UI:
Leveraging synergies between projects.
Reducing development time.
Programming core functionalities such as layered theming.
Creation of various components, including extended buttons and input elements.
Solving recurring issues and illustrating development patterns.
Documentation through an example project:
Onboarding new employees.
Adhering to existing conventions.
Training the team through presentations and exercises.
Technical environment: JavaScript (Babel), React, Material-UI, Styled Components, Apollo, GraphQL, Ramda, Jest, Git.

Feb 2019 - Jan 2020

1 year

Software Development

KAISER+KRAFT Europa GmbH

Creation of a responsive webshop with a B2B focus in three versions and over 20 countries.
Technical environment: JavaScript (Babel), React, Redux, Redux-Thunk, Ramda, Sass, Webpack, Jest, Git.

Jun 2018 - Dec 2018

7 months

Software Architecture and Development

Blockchain Holding GmbH

Development of a blockchain application from the idea to the final product.
Display of performance metrics of user computing power and financial results.
Overview based on the entire user account.
Detailed views for different cryptocurrencies.
Responsive design for different devices.
Requirements analysis with a UX designer.
Technical implementation of the requirements.
UI design process for aesthetics and development time.
Reusable React components for a minimal codebase.
Shared project structure for code reuse across project boundaries.
Rapid development through a fake backend.
Detailed documentation for backend and frontend coherence.
Technical environment: JavaScript (Babel), React, Material-UI, Redux, Redux-Saga, Ramda, React-Spring, Sass, Webpack, Jest, Git.

Apr 2016 - Apr 2018

2 years 1 month

Software Architect and Developer

GIS Gesellschaft für InformationsSysteme AG

Developed a digital workspace solution.
Intuitive interface, increased productivity, and employee networking.
Management of complete page structures and customizable widgets for content: news, wiki, calendar, etc.
Dynamic system to adapt to customer needs.
Maximum test coverage for quality assurance.
Storybook component catalog for structural tests and a showcase for clients.
Scalable internationalization and responsive design.
Use of stable tools for future-proof development.
Technical environment: JavaScript (Babel), React, Material-UI, Redux, Redux-Saga, Ramda, Sass, Webpack, stampit, Ava, Node.js, Gulp, Git.

May 2015 - Dec 2015

8 months

Software Development

IronShark / VOXELWORLD

Developed a 3D editor for products:
Editing and viewing in the browser.
Customization by users.
3D load and save options for configurations.
Manual and server-driven manipulation of 3D objects.
Configurable scenes for lighting, shadows, camera, and zoom.
UI components for customizations:
Color, material, size, texture, labeling.
Client-side internationalization.
Node.js modules and browser conversion with Browserify.
Use of code for client and server validation (UniversalJS).
Unit tests for logic modules.
Technical environment: JavaScript, three.js, UniversalJS, jQuery, WebGL, stampit, Git, Gulp, Browserify, BrowserSync, tape.

Jun 2014 - Jul 2014

2 months

Software Development

Developed a prototype for "What-if Analysis".
Full-stack application with MEAN.
Wizard input interface with synchronized charts.
Interactive and clear user guidance.
Animations in 2D and 3D.
Highly modular code structure.
Technical environment: JavaScript, Node.js, d3.js, AngularJS, three.js, Express, MEAN stack, stampit, Bootstrap, Sass, Mercurial.

Mar 2012 - Jul 2015

3 years 5 months

Frontend Team Lead, Software Development

FalkAnalytics

Technical design and implementation of a reporting frontend single-page application.
Graphical data processing with d3.js.
User-customizable component layout and intuitive interface.
JavaScript performance analysis.
Automated tests.
Creation of in-house prototypes with jQuery and Bootstrap.
Technical environment: JavaScript, ExtJs, d3.js, HTML, CSS.

Oct 2008 - Dec 2011

3 years 3 months

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Universität zu Lübeck

Degree: Master of Science in Computer Science.
Software Systems Engineering, modeling and implementation of large, complex software systems.
Consideration of the entire software life cycle: requirements analysis, specification, implementation, operation, and maintenance.

Apr 2008 - Sep 2008

6 months