Sergej G.-Software Developer and XR Expert
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Experience
IT Consultant and Software Developer
Görzen Consulting
- End-to-end ownership of client projects, from requirements to rollout
- CTO of Edumix, a platform for interactive learning content (not yet released)
- CTO of a B2B AR app with indoor navigation and a digital twin (Matterport)
- OnePortrait: migration from Node.js/Nuxt to React, Next.js and Go
- Interactive Three.js mosaic featuring thousands of images
- Daily use of AI tools and coding agents (agentic coding)
Technologies: React, Next.js, Go, Node.js, Unity (Editor Extensions, UaaL), Flutter, iOS, .NET MAUI, Supabase/PostgreSQL, Three.js
Projects: Edumix, AR Indoor Service App, OnePortrait
Research Associate – Research Software Engineering for EdTech and Technical Project Leadership
RWTH Aachen University
- Technical lead for BuddyAnalytics in the AIStudyBuddy university consortium
- Led two student teams (Web, XR; eight developers), working in an agile way and conducting code reviews
- Recruited and onboarded student assistants, managed stakeholders and prioritized the backlog
- Open-source framework OmiLAXR for multimodal data collection in eXtended Reality scenarios (VR/AR)
- Built and managed the OmiLAXR community (20+ members)
- Modernized the legacy SWOFI web application; containerized deployment with CI/CD
- Doctorate in Learning Analytics in XR (Dr.-Ing., magna cum laude)
- Teaching, Unity workshops; supervised 33 bachelor's and master's theses
Technologies: C#/Unity, AvaloniaUI, xAPI, TypeScript, Angular, React, Node.js, MongoDB, Python, Docker, GitLab CI
Projects: OmiLAXR, xAPI4Unity, ReCoPa, BuddyAnalytics, SWOFI, RePiX VR
Lead Developer
MINTANO UG (haftungsbeschränkt)
- Technical lead for an international team, including freelancers
- Managed external developers: assigning tasks, defining the Definition of Done and reviewing deliverables
- Built the virtual B2B photo booth OneBooth (SaaS, WebAR), live since 2021
- Maintained and further developed iOS apps
Technologies: TypeScript, Vue, Node.js, AWS, DeepAR, WebGL, Swift, Objective-C
Projects: OneBooth, Cheddar, Peerpix
Software Developer
MINTANO UG (haftungsbeschränkt)
- Interactive web applications for events and trade shows, including a live mosaic
- REST APIs on AWS; integrated the Instagram, Facebook and Twitter APIs
- Desktop application for on-site printing of event photos, including a layout editor
- Coordinated with international agencies
Technologies: C#/.NET Core, AWS (Lambda, S3), Three.js (WebGL), Angular, Electron
Projects: Oneprint, Mosaik Gallery, Picture Wall, Print Layout Creator
Working Student in Web Development
netspione (heute ir-interactive GmbH)
- Built websites to match design specifications, including TYPO3 extension development
- Created custom HTML components, server-side applications and database designs
Technologies: TYPO3, PHP, JavaScript/jQuery, HTML5, CSS3, MySQL
Application Developer
XOVI GmbH
- Desktop tool for car dealers with a server application, later switched to PHP
- Integration of the AutoScout24 and Mobile.de APIs; database design
Technologies: C#, WPF, PHP, MySQL
Projects: road.de
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Education, Professional Services, and Automotive.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Project Management, Human Resources, and Research and Development.
Summary
I build software products end to end, from requirements and architecture through implementation and rollout. My work spans web applications, mobile apps, XR and WebAR, interactive 3D experiences, APIs and cloud services. I work with React, Next.js, Go, Node.js, Unity, Flutter, iOS, .NET MAUI, Three.js, Supabase/PostgreSQL and AWS.
I also bring experience in technical project leadership, agile team coordination, code reviews, stakeholder management and open-source communities. At RWTH Aachen University, I led teams of up to eight developers, contributed to research software for VR/AR and completed a doctorate in Learning Analytics in XR. I use AI tools and coding agents daily to support modern software development.
Skills
- Cross-Functional Skills: Technical Leadership, Ownership, Stakeholder Management, Agile Development, Backlog Prioritization, Requirements Analysis, Recruiting And Onboarding, Mentoring, Developer Enablement, Community Management
- Web: Typescript, React/Next.Js, Vue 3/Nuxt 3, Angular, Svelte, Node.Js (Express, Fastify), Three.Js/Webgl, Electron
- C# / .Net: Asp.Net, .Net Core, Wpf, Avaloniaui, Unity
- Mobile & Xr: Flutter/Dart, Ios (Swift), Unity Ar/Vr, Webar
- Other Languages: Go, Python (Pandas, Polars), C++ (Opengl, Opencv), Rust (Bevy)
- Data: Postgresql, Mysql, Mongodb, Supabase, Xapi
- Devops & Cloud: Git, Docker, Linux, Ci/Cd (Github Actions, Gitlab Ci), Aws (Lambda, S3)
Languages
Education
RWTH Aachen University
Dr.-Ing. · Computer Science · Aachen, Germany · magna cum laude
RWTH Aachen University
Master of Science · Computer Science · Aachen, Germany · 2,0
TH Köln
Bachelor of Science · General Computer Science · Gummersbach, Germany · 2,1
Statistics
Experience
Global experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Sergej is based in Reichshof, Germany and can operate in on-site, hybrid, and remote work models.
Sergej speaks the following languages: German (Native), Russian (Native), English (Advanced).
Sergej has at least 13 years of experience. During this time, Sergej has worked in at least 6 different roles and for 5 different companies. The average length of individual experience is 2 years and 2 months. Note that Sergej may not have shared all experience and actually has more experience.
Based on recent experience, Sergej would be well-suited for roles such as: IT Consultant and Software Developer, Research Associate – Research Software Engineering for EdTech and Technical Project Leadership, Lead Developer.
Sergej's most recent position is IT Consultant and Software Developer at Görzen Consulting.
In recent years, Sergej has worked for Görzen Consulting and RWTH Aachen University.
Sergej is most experienced in industries like Information Technology, Education, and Professional Services. Sergej also has some experience in Automotive.
Sergej is most experienced in business areas like Information Technology, Product Development, and Project Management. Sergej also has some experience in Human Resources and Research and Development.
Sergej has recently worked in industries like Education, Information Technology, and Professional Services.
Sergej has recently worked in business areas like Information Technology, Product Development, and Project Management.
Sergej holds a Doctorate in Computer Science from RWTH Aachen University, a Master in Computer Science from RWTH Aachen University and a Bachelor in General Computer Science from TH Köln.
Sergej is immediately available full-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 3 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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