(Company on request) is a software company from Germany. We ship products that solve real problems ? built with care, designed to last.
Aktualisiert am 19.05.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 18.05.2026
Verfügbar zu: 100%
davon vor Ort: 100%
React
Mathematik
SQL
Webapplication
Web Application
Fullstack
Berechtigungen
Infrastruktur
Microservices

Einsatzorte

Einsatzorte

Munich (+150km)
Deutschland
möglich

Projekte

Projekte

8 Monate
2025-10 - heute

B2B Software Products and Scalable Web Services

Founder & Managing Director React Router PostgreSQL/Drizzle Auth0 ...
Founder & Managing Director
Founder and hands-on software developer building innovative business tools and web applications, with a focus on B2B software products and scalable web services.
  • Leading the development of web-based software tools, ERPs, and contract development projects, handling both strategic and technical responsibilities
  • Built a scalable, cloud-based WYSIWYG editor for scientific writing (marktex.app) with live collaboration using Lexical, Yjs, WebSockets, and Durable Objects, including cloud-based LaTeX compilation
  • Implemented a modern, fully cloud-native architecture using React Router, PostgreSQL/ Drizzle, Auth0 and Cloudflare (Workers/D1/R2/Containers/Queues) with CI/CD pipelines
  • Managing a small founding team, sharing responsibilities across development, client interactions, and business strategy
  • Developing a smart POS software for cellphone stores that recommends plans and hardware based on customer needs while optimizing for shop goals
  • Focused on building user-centric, highly reliable software with scalability on cloud PaaS
React Router PostgreSQL/Drizzle Auth0 Cloudflare Workers/D1/R2/Queues/Containers Yjs WebSockets CI/CD (GitHub Actions)
on request
Bayrischzell
2 Jahre 4 Monate
2024-02 - heute

Development, maintenance, and further development of multiple applications

Software Engineer React TypeScript Go ...
Software Engineer
Full-stack engineer responsible for the development, maintenance and evolution of multiple mission-critical internal and client-facing applications in a small agile team.
  • Took full ownership of the rail planning tool (formerly a freelance project), maintaining and extending its complex real-time scheduling system for multi-user operational use
  • Developed and maintained a client/project/order management tool using React, Laravel and MySQL, transitioning it from legacy PHP to a modern full-stack architecture and improving operational reliability
  • Contributed to the design and ongoing development of a cloud-hosted ERP platform for real estate agencies, including React frontend, Go backend, CI/CD pipelines and collaboration features for hundreds of expected users
  • Participated actively in architectural and design decisions across all projects, including performance optimization, real-time updates and automated notifications
  • Coordinated closely with team members in a flat agile setup, ensuring smooth delivery of new features and rapid response to issues
  • Directly liaised with clients and management, presenting features, gathering requirements, and providing accurate development time estimates
  • Maintained long-term business relationships through consistent, reliable delivery and proactive communication
React TypeScript Go PostgreSQL/MySQL WebSockets Docker CI/CD (GitHub Actions) Cloud & On-Premise Deployment
Sunny Systems GmbH
Munich
2 Jahre 8 Monate
2021-06 - 2024-01

Initiation, Specification and Provision of a Planning System

Software Engineer (Freelancer) React TypeScript PostgreSQL ...
Software Engineer (Freelancer)
Freelance software engineer responsible for initiating, specifying and delivering a custom, mission-critical planning system for rail operations.
  • Initiated and pitched the replacement of a business-critical Excel-based disposition workflow with a custom software solution
  • Led requirements discovery with disposition, maintenance, and sales teams to design a domain-specific planning and resource management system
  • Designed and implemented a complex real-time web application for rail scheduling, resource allocation, and maintenance planning
  • Built a graphical planning interface with advanced drag-and-drop interactions, conflict detection and constraint enforcement
  • Implemented live multi-user updates via WebSockets, ensuring a single source of truth for 24/7 operational use
  • Introduced role-based access control, SSO, audit logging, and export functionality to meet operational and compliance needs
  • Scaled development by coordinating a small team of developers while retaining architectural and product ownership
  • Deployed and operated the system on-premise
  • Rolled out the application through user training and onboarding, enabling a smooth transition for a critical operational change
React TypeScript PostgreSQL WebSockets Konva.js GitHub Actions On-Premise Deployment
RailAdventure GmbH
Munich
4 Jahre 1 Monat
2019-08 - 2023-08

B2B-Projects

Project Manager & Digital Transformation Officer PDS (ERP) Caneco (CAD) JavaScript (Google Apps Script) ...
Project Manager & Digital Transformation Officer
Started as a Working Student and progressed to Project Manager and Digital Transformation Officer, leading client projects and company-wide process digitization in an electrical engineering firm focused on e-mobility infrastructure.
  • Led end-to-end execution of e-mobility infrastructure projects, coordinating internal teams, contractors and external stakeholders
  • Managed parallel short-cycle projects, ensuring on-time delivery under tight execution windows
  • Designed and implemented digital project management workflows, improving transparency, coordination and execution speed
  • Built a digital product catalog with automated quotation and project cost calculation, reducing manual effort and error rates
  • Developed internal helper tools for standards-compliant electrical design, improving planning quality and consistency
  • Introduced company-wide digital infrastructure (wiki, cloud storage, digital forms, data transfer interfaces) to replace fragmented manual processes
  • Supported management in client acquisition, proposal preparation and strategic repositioning toward larger-scale B2B projects
PDS (ERP) Caneco (CAD) JavaScript (Google Apps Script) Google Cloud
Nelhiebel Elektrotechnik GmbH
Munich

Aus- und Weiterbildung

Aus- und Weiterbildung

2 Jahre 8 Monate
2023-10 - heute

Promotion

Dr. rer. nat. (in progress), Technische Universität München
Dr. rer. nat. (in progress)
Technische Universität München
Dissertation: on request
2 Jahre 1 Monat
2018-10 - 2020-10

Studie - Mathematics in Science and Engineering

Master of Science, Technische Universität München
Master of Science
Technische Universität München
  • Thesis: on request
3 Jahre 10 Monate
2014-10 - 2018-07

Studie - Mathematik, NF: Experimentalphysik

Bachelor of Science, Ludwig-Maximilians-Universität
Bachelor of Science
Ludwig-Maximilians-Universität
  • Thesis: on request

Kompetenzen

Kompetenzen

Top-Skills

React Mathematik SQL Webapplication Web Application Fullstack Berechtigungen Infrastruktur Microservices

Produkte / Standards / Erfahrungen / Methoden

Profile
Software engineer and entrepreneur building scalable, user-focused web applications and business tools. Experienced in cloud-native architectures, real-time collaboration and complex planning systems. Currently leading quebi GmbH, developing modern B2B software with React Router, PostgreSQL, Cloudflare Workers and collaborative frameworks. Combines hands-on full-stack development, product ownership and scalable system design to deliver reliable solutions.

SKILLS
  • Frontend
    • React
    • React Router
    • Konva.js
    • Three.js
    • WebSockets
    • Yjs
    • Lexical
  • Backend & Infra
    • PostgreSQL
    • Drizzle ORM
    • MySQL
    • Cloudflare Workers/Containers/Queues
    • Cloudflare D1/R2
    • Auth0
  • DevOps & Tools
    • Git
    • GitHub Actions
    • Docker
    • CI/CD
    • On-Premise Deployment
  • Scientific Computing
    • MATLAB
    • NumPy/SciPy
    • CUDA
    • Finite Element Methods
    • Linear Algebra
    • Integrators

Programmiersprachen

TypeScript
Go
Python
C#
C++
SQL

Einsatzorte

Einsatzorte

Munich (+150km)
Deutschland
möglich

Projekte

Projekte

8 Monate
2025-10 - heute

B2B Software Products and Scalable Web Services

Founder & Managing Director React Router PostgreSQL/Drizzle Auth0 ...
Founder & Managing Director
Founder and hands-on software developer building innovative business tools and web applications, with a focus on B2B software products and scalable web services.
  • Leading the development of web-based software tools, ERPs, and contract development projects, handling both strategic and technical responsibilities
  • Built a scalable, cloud-based WYSIWYG editor for scientific writing (marktex.app) with live collaboration using Lexical, Yjs, WebSockets, and Durable Objects, including cloud-based LaTeX compilation
  • Implemented a modern, fully cloud-native architecture using React Router, PostgreSQL/ Drizzle, Auth0 and Cloudflare (Workers/D1/R2/Containers/Queues) with CI/CD pipelines
  • Managing a small founding team, sharing responsibilities across development, client interactions, and business strategy
  • Developing a smart POS software for cellphone stores that recommends plans and hardware based on customer needs while optimizing for shop goals
  • Focused on building user-centric, highly reliable software with scalability on cloud PaaS
React Router PostgreSQL/Drizzle Auth0 Cloudflare Workers/D1/R2/Queues/Containers Yjs WebSockets CI/CD (GitHub Actions)
on request
Bayrischzell
2 Jahre 4 Monate
2024-02 - heute

Development, maintenance, and further development of multiple applications

Software Engineer React TypeScript Go ...
Software Engineer
Full-stack engineer responsible for the development, maintenance and evolution of multiple mission-critical internal and client-facing applications in a small agile team.
  • Took full ownership of the rail planning tool (formerly a freelance project), maintaining and extending its complex real-time scheduling system for multi-user operational use
  • Developed and maintained a client/project/order management tool using React, Laravel and MySQL, transitioning it from legacy PHP to a modern full-stack architecture and improving operational reliability
  • Contributed to the design and ongoing development of a cloud-hosted ERP platform for real estate agencies, including React frontend, Go backend, CI/CD pipelines and collaboration features for hundreds of expected users
  • Participated actively in architectural and design decisions across all projects, including performance optimization, real-time updates and automated notifications
  • Coordinated closely with team members in a flat agile setup, ensuring smooth delivery of new features and rapid response to issues
  • Directly liaised with clients and management, presenting features, gathering requirements, and providing accurate development time estimates
  • Maintained long-term business relationships through consistent, reliable delivery and proactive communication
React TypeScript Go PostgreSQL/MySQL WebSockets Docker CI/CD (GitHub Actions) Cloud & On-Premise Deployment
Sunny Systems GmbH
Munich
2 Jahre 8 Monate
2021-06 - 2024-01

Initiation, Specification and Provision of a Planning System

Software Engineer (Freelancer) React TypeScript PostgreSQL ...
Software Engineer (Freelancer)
Freelance software engineer responsible for initiating, specifying and delivering a custom, mission-critical planning system for rail operations.
  • Initiated and pitched the replacement of a business-critical Excel-based disposition workflow with a custom software solution
  • Led requirements discovery with disposition, maintenance, and sales teams to design a domain-specific planning and resource management system
  • Designed and implemented a complex real-time web application for rail scheduling, resource allocation, and maintenance planning
  • Built a graphical planning interface with advanced drag-and-drop interactions, conflict detection and constraint enforcement
  • Implemented live multi-user updates via WebSockets, ensuring a single source of truth for 24/7 operational use
  • Introduced role-based access control, SSO, audit logging, and export functionality to meet operational and compliance needs
  • Scaled development by coordinating a small team of developers while retaining architectural and product ownership
  • Deployed and operated the system on-premise
  • Rolled out the application through user training and onboarding, enabling a smooth transition for a critical operational change
React TypeScript PostgreSQL WebSockets Konva.js GitHub Actions On-Premise Deployment
RailAdventure GmbH
Munich
4 Jahre 1 Monat
2019-08 - 2023-08

B2B-Projects

Project Manager & Digital Transformation Officer PDS (ERP) Caneco (CAD) JavaScript (Google Apps Script) ...
Project Manager & Digital Transformation Officer
Started as a Working Student and progressed to Project Manager and Digital Transformation Officer, leading client projects and company-wide process digitization in an electrical engineering firm focused on e-mobility infrastructure.
  • Led end-to-end execution of e-mobility infrastructure projects, coordinating internal teams, contractors and external stakeholders
  • Managed parallel short-cycle projects, ensuring on-time delivery under tight execution windows
  • Designed and implemented digital project management workflows, improving transparency, coordination and execution speed
  • Built a digital product catalog with automated quotation and project cost calculation, reducing manual effort and error rates
  • Developed internal helper tools for standards-compliant electrical design, improving planning quality and consistency
  • Introduced company-wide digital infrastructure (wiki, cloud storage, digital forms, data transfer interfaces) to replace fragmented manual processes
  • Supported management in client acquisition, proposal preparation and strategic repositioning toward larger-scale B2B projects
PDS (ERP) Caneco (CAD) JavaScript (Google Apps Script) Google Cloud
Nelhiebel Elektrotechnik GmbH
Munich

Aus- und Weiterbildung

Aus- und Weiterbildung

2 Jahre 8 Monate
2023-10 - heute

Promotion

Dr. rer. nat. (in progress), Technische Universität München
Dr. rer. nat. (in progress)
Technische Universität München
Dissertation: on request
2 Jahre 1 Monat
2018-10 - 2020-10

Studie - Mathematics in Science and Engineering

Master of Science, Technische Universität München
Master of Science
Technische Universität München
  • Thesis: on request
3 Jahre 10 Monate
2014-10 - 2018-07

Studie - Mathematik, NF: Experimentalphysik

Bachelor of Science, Ludwig-Maximilians-Universität
Bachelor of Science
Ludwig-Maximilians-Universität
  • Thesis: on request

Kompetenzen

Kompetenzen

Top-Skills

React Mathematik SQL Webapplication Web Application Fullstack Berechtigungen Infrastruktur Microservices

Produkte / Standards / Erfahrungen / Methoden

Profile
Software engineer and entrepreneur building scalable, user-focused web applications and business tools. Experienced in cloud-native architectures, real-time collaboration and complex planning systems. Currently leading quebi GmbH, developing modern B2B software with React Router, PostgreSQL, Cloudflare Workers and collaborative frameworks. Combines hands-on full-stack development, product ownership and scalable system design to deliver reliable solutions.

SKILLS
  • Frontend
    • React
    • React Router
    • Konva.js
    • Three.js
    • WebSockets
    • Yjs
    • Lexical
  • Backend & Infra
    • PostgreSQL
    • Drizzle ORM
    • MySQL
    • Cloudflare Workers/Containers/Queues
    • Cloudflare D1/R2
    • Auth0
  • DevOps & Tools
    • Git
    • GitHub Actions
    • Docker
    • CI/CD
    • On-Premise Deployment
  • Scientific Computing
    • MATLAB
    • NumPy/SciPy
    • CUDA
    • Finite Element Methods
    • Linear Algebra
    • Integrators

Programmiersprachen

TypeScript
Go
Python
C#
C++
SQL

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