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Sergej GörzenSG

Sergej Görzen

XR, 3D, Analytics, Web and Full-Stack

€960/day
Köln, DE
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sergej

I develop software for projects where standard solutions are not sufficient.

My focus is on technically demanding products and special solutions: where multiple technologies, systems, or requirements must work together seamlessly to create a robust product, not just something that works.

I guided a startup through the Corona period and built a SaaS platform that is still in use today. Since then, I have productively implemented software in very different constellations – from C#/.NET and web projects to XR, AR, and data-driven systems.

I am familiar with technical responsibility from various roles: as CTO, Lead Developer, Freelancer, and in coordinating development teams.

In terms of content, I primarily work on .NET/backend systems, web and API products, as well as XR and learning analytics-related solutions, for example in instrumentation, data pipelines, and frameworks.

I work systematically, transparently, pragmatically, and hands-on. My goal is viable solutions, not just fast code.

I look forward to discussing challenging software and product projects.
  • German

    Native or bilingual

  • English

    Fluent

  • Russian

    Native or bilingual

Can work on-site
Köln (up to 50km)

Experience

  • Freiberuflich
    IT Consultant & Software System Engineer
    RESTAURANTS AND FOOD SERVICE
    April 2024 - Today (2 years and 4 months)
    Köln, Germany
    ○ Unity/XR: Implementation and integration of product-related software solutions with a focus on Unity/XR and Full-Stack (Web/Mobile/Services).
    ○ Responsibility for critical integration packages: Localization/VPS, AR workflows, and embedding Unity modules into existing apps (e.g., Flutter via Unity as a Library) – with a focus on stable UX, performance, and energy consumption.
    ○ Delivery: Clarifying requirements, technical conception, implementation, reviews/quality standards, go-live support, and handover to the team.
    ○ Technologies (excerpt): Unity/C#, C#/.NET, TypeScript, Flutter, Git, Docker, Cloud/Backend Services.
    Unity 3D C# Flutter three.js Augmented Reality
  • RWTH Aachen University,
    Research Associate / Doctoral Candidate
    RESEARCH
    April 2021 - Today (5 years and 4 months)
    Aachen, Germany
    ○ Unity/XR: Development and further development of interactive scenarios in XR (VR/AR) and Learning Analytics, including reusable components.
    ○ Real-time & Performance: Building instrumentation/telemetry in Unity and stabilization under runtime constraints (profiling, GC/allocations, bottlenecks).
    ○ Team Lead & Delivery: Leading small development teams (planning, prioritization, reviews, quality standards) and reliable implementation to milestones/deadlines; coordination with stakeholders/POs.
    ○ Enablement: Onboarding, workshops, mentoring/reviews, and supervision of projects/theses.
    ○ Technologies (excerpt): Unity/C#, .NET, Python, TypeScript, React/Vue/Angular, Git.
    Unity 3D Typescript Virtual Reality Leadership Development Software Architecture
  • MINTANO UG
    Lead Developer
    ENTERTAINMENT AND LEISURE
    April 2020 - March 2021 (11 months)
    Düsseldorf, Germany
    ○ Responsibility for the delivery of customer/product projects (planning, coordination of employees/freelancers, reviews/quality assurance).
    ○ Project Example: Development of a virtual photo booth with AR filters (face tracking) as an interactive web experience, including integration and UX workflows.
    ○ Technologies (excerpt): DeepAR, WebXR/WebGL, JavaScript/TypeScript, Git.
    Typescript VueJS three.js DeepAR Augmented Reality

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Education

  • Dr. rer. nat.
    RWTH Aachen University
    Dr. rer. nat.
  • M. Sc. Computer Science
    RWTH Aachen University
    2021
    M. Sc. Informatik

Skill set

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