Backend & Application Development (.NET, Node.js)
Aktualisiert am 27.01.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 02.02.2026
Verfügbar zu: 100%
davon vor Ort: 100%
Back-End
TypeScript
.NET
C#
REST
Node.js
React
Angular
SQL
MS SQL Server
PostgreSQL
Microservices
Kubernetes
Künstliche Intelligenz
CI/CD
Git
Agile Softwareentwicklung
Azure
Docker
Systemintegration
Hungarian
native
English
Advanced (C1)
German
Intermediate (A2?B1)

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 Jahre 5 Monate
2023-09 - heute

AI-powered platform for the hospitality industry

Chief Technology Officer/ Senior Engineer .NET C# React ...
Chief Technology Officer/ Senior Engineer
  • Led and mentored a distributed, cross-functional team of 6 engineers building a Swiss AI-powered hospitality platform.
  • Owned system architecture and technical direction across backend, frontend and infrastructure.
  • Designed and operated a microservices architecture with real-time components and Redis caching, optimizing performance as the platform scaled and reducing API latency by ~30%.
  • Built and maintained Kubernetes-based production infrastructure with automated CI/CD and blue-green deployments, cutting release cycles from days to minutes.
  • Integrated multiple external systems including Apaleo PMS and communication APIs.
  • Implemented AI-driven workflows using OpenAI and other LLM providers, automating approximately 40% of inbound guest inquiries.
  • Established monitoring, alerting, and SRE practices, improving uptime and reducing incident MTTR.
  • Acted as the primary technical decision-maker, balancing delivery speed, system reliability, and long-term maintainability.
  • Worked closely with product stakeholders to translate business requirements into scalable system designs.
.NET C# React TypeScript Express Node.js Next.js Nest.js Entity Framework Kubernetes Azure AWS GCP Docker MSSQL Postgres
Interien Technologies Kft.
Budapest (Hungary)
2 Jahre 5 Monate
2021-04 - 2023-08

Development and maintenance of full-stack web and mobile applications

Full-Stack/ Platform Engineer .NET C# Angular ...
Full-Stack/ Platform Engineer
  • Built and maintained full-stack web and mobile applications for international medical and legal tech clients.
  • Implemented microservices and real-time components used in production.
  • Owned Kubernetes infrastructure and deployment workflows.
  • Modernized CI/CD pipelines for multiple production services.
  • Containerized legacy applications and migrated them to Kubernetes.
  • Improved observability, logging, and Linux server stability.
  • Focused on platform reliability and DevOps work during a reduced-hours transition toward founding a startup.
.NET C# Angular React TypeScript Express Node.js Nest.js Entity Framework Azure AWS Kubernetes Docker MSSQL MongoDB
ArtOfInfo Kft.
Budapest (Hungary)
5 Monate
2020-11 - 2021-03

Full-Stack Development

Full-Stack Developer Node.js Express React ...
Full-Stack Developer
  • Built a full-stack MERN webshop for a gaming client.
  • Implemented backend services, UI components, and caching improvements.
  • Collaborated with designers and PMs to deliver a polished user experience.
Node.js Express React MongoDB
Nagy Judit EV.
Budapest (Hungary)
11 Monate
2020-03 - 2021-01

international travel planning and ticketing platform

Co-founder/ Technical Lead
Co-founder/ Technical Lead
Co-founded an international trip planning and ticket purchasing platform supporting multileg and cross-border journeys. Built routing, data integration, and mobile experiences until project termination following VC disqualification.
on request
9 Monate
2020-02 - 2020-10

Kubernetes-based game server platform

Java Developer/ Infrastructure Engineer
Java Developer/ Infrastructure Engineer
Designed and built an auto-scaling Kubernetes-based game server platform distributing players across multiple dedicated nodes. Developed server-side game logic and custom minigames while operating and maintaining the underlying infrastructure.
MineSide
3 Monate
2020-01 - 2020-03

Full-Stack Engineering

Co-founder/ Full-Stack Engineer
Co-founder/ Full-Stack Engineer
Built an early-stage food and grocery delivery platform connecting customers directly with couriers, including real-time order and delivery tracking.
on request
7 Monate
2018-08 - 2019-02

Platform Engineering

Platform Engineer
Platform Engineer
Developed a Minecraft server platform introducing JavaScript-based services into a Javacentric ecosystem, integrating Node.js services with Java-based game logic.
HyperNetwork

Aus- und Weiterbildung

Aus- und Weiterbildung

2021 - 2022
Computer Science
Saarland University

2020 - 2021
Computer Engineering
Óbuda University

2016 - 2020
Computer Science Specialization
ISZTI

Certifications
Cisco CCNA Routing & Switching

Position

Position

Senior Full-Stack Engineer (.NET/ React) | Platform & Cloud

Kompetenzen

Kompetenzen

Top-Skills

Back-End TypeScript .NET C# REST Node.js React Angular SQL MS SQL Server PostgreSQL Microservices Kubernetes Künstliche Intelligenz CI/CD Git Agile Softwareentwicklung Azure Docker Systemintegration

Schwerpunkte

  • End-to-end system ownership (product ? production)
  • Cloud-native architecture & Kubernetes operations
  • .NET/ C# backend services at scale
  • Modern React/ Next.js frontends
  • CI/CD, reliability and SRE-style practices
  • Distributed team collaboration

Produkte / Standards / Erfahrungen / Methoden

Profile
Senior full-stack engineer with 7+ years of experience building and operating cloud-native, production systems. Strong focus on ownership: architecture, delivery, reliability, and longterm maintainability. Former CTO leading distributed teams across locations, comfortable owning systems end-to-end from product requirements to infrastructure, CI/CD, and on-call stability. Strong background in .NET and TypeScript-based systems, with solid Kubernetes and platform experience.

Technical Focus
  • Primary: .NET, C#, ASP.NET Core, Entity Framework, TypeScript, React, Node.js
  • Platform & Infra: Kubernetes, Docker, Linux, CI/CD, Azure, AWS, GCP, Redis
  • Data: PostgreSQL, MSSQL, MongoDB
  • Systems: REST APIs, WebSockets, real-time & event-driven systems
  • AI Integrations: OpenAI API, LLM-driven workflows
  • Role Focus: Senior Full-Stack Engineer with platform and infrastructure ownership
  • Additional Technologies: Angular, Vue.js, React Native, ASP.NET Core, Python, PHP, Meteor, Nuxt.js

Engineering Focus Areas
  • System design, service orchestration, scalability, performance optimization, distributed and real-time systems, business logic, product-driven development, cross-functional collaboration, stakeholder communication, technical leadership, decision-making, mentoring, end-to-end ownership

Einsatzorte

Einsatzorte

Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 Jahre 5 Monate
2023-09 - heute

AI-powered platform for the hospitality industry

Chief Technology Officer/ Senior Engineer .NET C# React ...
Chief Technology Officer/ Senior Engineer
  • Led and mentored a distributed, cross-functional team of 6 engineers building a Swiss AI-powered hospitality platform.
  • Owned system architecture and technical direction across backend, frontend and infrastructure.
  • Designed and operated a microservices architecture with real-time components and Redis caching, optimizing performance as the platform scaled and reducing API latency by ~30%.
  • Built and maintained Kubernetes-based production infrastructure with automated CI/CD and blue-green deployments, cutting release cycles from days to minutes.
  • Integrated multiple external systems including Apaleo PMS and communication APIs.
  • Implemented AI-driven workflows using OpenAI and other LLM providers, automating approximately 40% of inbound guest inquiries.
  • Established monitoring, alerting, and SRE practices, improving uptime and reducing incident MTTR.
  • Acted as the primary technical decision-maker, balancing delivery speed, system reliability, and long-term maintainability.
  • Worked closely with product stakeholders to translate business requirements into scalable system designs.
.NET C# React TypeScript Express Node.js Next.js Nest.js Entity Framework Kubernetes Azure AWS GCP Docker MSSQL Postgres
Interien Technologies Kft.
Budapest (Hungary)
2 Jahre 5 Monate
2021-04 - 2023-08

Development and maintenance of full-stack web and mobile applications

Full-Stack/ Platform Engineer .NET C# Angular ...
Full-Stack/ Platform Engineer
  • Built and maintained full-stack web and mobile applications for international medical and legal tech clients.
  • Implemented microservices and real-time components used in production.
  • Owned Kubernetes infrastructure and deployment workflows.
  • Modernized CI/CD pipelines for multiple production services.
  • Containerized legacy applications and migrated them to Kubernetes.
  • Improved observability, logging, and Linux server stability.
  • Focused on platform reliability and DevOps work during a reduced-hours transition toward founding a startup.
.NET C# Angular React TypeScript Express Node.js Nest.js Entity Framework Azure AWS Kubernetes Docker MSSQL MongoDB
ArtOfInfo Kft.
Budapest (Hungary)
5 Monate
2020-11 - 2021-03

Full-Stack Development

Full-Stack Developer Node.js Express React ...
Full-Stack Developer
  • Built a full-stack MERN webshop for a gaming client.
  • Implemented backend services, UI components, and caching improvements.
  • Collaborated with designers and PMs to deliver a polished user experience.
Node.js Express React MongoDB
Nagy Judit EV.
Budapest (Hungary)
11 Monate
2020-03 - 2021-01

international travel planning and ticketing platform

Co-founder/ Technical Lead
Co-founder/ Technical Lead
Co-founded an international trip planning and ticket purchasing platform supporting multileg and cross-border journeys. Built routing, data integration, and mobile experiences until project termination following VC disqualification.
on request
9 Monate
2020-02 - 2020-10

Kubernetes-based game server platform

Java Developer/ Infrastructure Engineer
Java Developer/ Infrastructure Engineer
Designed and built an auto-scaling Kubernetes-based game server platform distributing players across multiple dedicated nodes. Developed server-side game logic and custom minigames while operating and maintaining the underlying infrastructure.
MineSide
3 Monate
2020-01 - 2020-03

Full-Stack Engineering

Co-founder/ Full-Stack Engineer
Co-founder/ Full-Stack Engineer
Built an early-stage food and grocery delivery platform connecting customers directly with couriers, including real-time order and delivery tracking.
on request
7 Monate
2018-08 - 2019-02

Platform Engineering

Platform Engineer
Platform Engineer
Developed a Minecraft server platform introducing JavaScript-based services into a Javacentric ecosystem, integrating Node.js services with Java-based game logic.
HyperNetwork

Aus- und Weiterbildung

Aus- und Weiterbildung

2021 - 2022
Computer Science
Saarland University

2020 - 2021
Computer Engineering
Óbuda University

2016 - 2020
Computer Science Specialization
ISZTI

Certifications
Cisco CCNA Routing & Switching

Position

Position

Senior Full-Stack Engineer (.NET/ React) | Platform & Cloud

Kompetenzen

Kompetenzen

Top-Skills

Back-End TypeScript .NET C# REST Node.js React Angular SQL MS SQL Server PostgreSQL Microservices Kubernetes Künstliche Intelligenz CI/CD Git Agile Softwareentwicklung Azure Docker Systemintegration

Schwerpunkte

  • End-to-end system ownership (product ? production)
  • Cloud-native architecture & Kubernetes operations
  • .NET/ C# backend services at scale
  • Modern React/ Next.js frontends
  • CI/CD, reliability and SRE-style practices
  • Distributed team collaboration

Produkte / Standards / Erfahrungen / Methoden

Profile
Senior full-stack engineer with 7+ years of experience building and operating cloud-native, production systems. Strong focus on ownership: architecture, delivery, reliability, and longterm maintainability. Former CTO leading distributed teams across locations, comfortable owning systems end-to-end from product requirements to infrastructure, CI/CD, and on-call stability. Strong background in .NET and TypeScript-based systems, with solid Kubernetes and platform experience.

Technical Focus
  • Primary: .NET, C#, ASP.NET Core, Entity Framework, TypeScript, React, Node.js
  • Platform & Infra: Kubernetes, Docker, Linux, CI/CD, Azure, AWS, GCP, Redis
  • Data: PostgreSQL, MSSQL, MongoDB
  • Systems: REST APIs, WebSockets, real-time & event-driven systems
  • AI Integrations: OpenAI API, LLM-driven workflows
  • Role Focus: Senior Full-Stack Engineer with platform and infrastructure ownership
  • Additional Technologies: Angular, Vue.js, React Native, ASP.NET Core, Python, PHP, Meteor, Nuxt.js

Engineering Focus Areas
  • System design, service orchestration, scalability, performance optimization, distributed and real-time systems, business logic, product-driven development, cross-functional collaboration, stakeholder communication, technical leadership, decision-making, mentoring, end-to-end ownership

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