Senior Full-Stack Developer: React / TypeScript / .NET 100 % Remote, KI-First

Software solution in the Microsoft/Cloud environment. Our collaboration takes place entirely in the home office, with short coordination routes, high self-responsibility, and a strongly KI-supported working method.

We are looking for an experienced full-stack developer with a focus on React, TypeScript, .NET, and cloud-native development. The role is particularly suitable for people who think features holistically and enjoy taking responsibility from the database layer to the backend APIs to the user interface.

We consistently use KI tools in our daily development process – from planning to implementation, debugging, and code reviews to documentation and process optimization.

Tasks

You will develop modern full-stack features end-to-end and work closely with product management, frontend/backend development, and other technical partners. It's not just about implementing individual tickets, but about genuine ownership for complete functions.

Your tasks include:

• End-to-end feature development from the database layer to REST APIs to React UI

• Design and implementation of responsive React components for desktop and mobile

• Development of scalable backend APIs with .NET 9, C#, FastEndpoints, and Entity Framework Core

• Work with React 19, TypeScript 5.9, Tailwind CSS, Radix UI, TanStack Router, and TanStack Query

• Integration with Office.js, Microsoft Graph API, and Azure Services

• Implementation and further development of authentication and integration processes with Azure MSAL

• Participation in database design, SQL structures, and performance questions

• Cloud-native development and deployment on Azure, including Azure Container Apps

• Work with Docker, GitHub Actions, Elasticsearch, Redis, Azure OpenAI, and Azure Service Bus

• Active participation in code reviews across the entire stack

• Mitigation of technical architecture decisions

• 3 Active use of KI tools to increase quality, speed, and transparency in the development process

Qualification

We are looking for an experienced full-stack person who not only masters modern frontend development but also backend and API development. What's important is not just technical experience, but also the ability to understand features holistically, implement them independently, and develop good solutions in the team.

You should have at least 5 years of full-stack experience with modern frameworks and be able to move confidently between frontend and backend. In frontend, you should have good React and TypeScript knowledge, including React Hooks, State Management, REST APIs, and responsive surfaces. In backend, you should be familiar with .NET, C#, REST APIs, Entity Framework Core, and SQL.

Since our product is strongly connected to Microsoft, Cloud, and KI technologies, it's helpful if you think and implement APIs, integrations, and cloud-native architectures holistically.

You should also bring:

• Solid knowledge of React and TypeScript

• Solid knowledge of .NET/C#

• Experience with Entity Framework Core, REST APIs, and SQL

• Experience in designing and implementing responsive surfaces for desktop and mobile

• Good understanding of database design and SQL structures

• Experience with Git, modern build tools like Vite or Webpack, and DevOps fundamentals

• Cloud-First mindset, preferably with Azure or alternatively AWS

• Interest in Microsoft technologies like Office.js, Microsoft Graph API, and Azure MSAL

• Openness to KI-supported development processes and ideally practical experience with corresponding tools

Very good self-organization in the home office

• Proactive and clear communication in the remote team

• A structured, pragmatic, and solution-oriented working method

• A sense of balance between quick solutions and long-term sustainability

• Product-oriented thinking and joy in developing a software product over the long term

• Fluent German language skills

We would also like it if you already have experience with some of the following technologies or topics:

• TanStack Router, TanStack Query, or Zustand

• Office.js or Office/Outlook add-in development

• Azure AD/Microsoft Entra ID or Azure OpenAI

• Elasticsearch or Redis

• Docker and GitHub Actions

• PostgreSQL and performance optimization

• KI tools like GitHub Copilot, ChatGPT, Claude, Cursor, Windsurf, or similar tools

• Good English language skills for technical documentation and working with development resources

Benefits

We are a small, very friendly, and heartwarming team that works with great passion on our product. What's important to us is that the collaboration not only functions well technically but also personally fits. We support each other, communicate openly and respectfully, and make decisions without long concern routes.

You will work 100% remotely from your home office, with flexible working hours and common availability around 10:00 am to 4:00 pm. Part-time (20 hours per week) is also possible, full-time is welcome too.

In addition, you can expect:

• A KI-First working method with consistent use of modern KI tools

• A modern tech stack with React 19, TypeScript 5.9, .NET 9, PostgreSQL, and Azure

• Exciting integrations with Office.js, Microsoft Graph API, and Azure OpenAI

• Tech diversity through daily work with frontend, backend, and cloud services

• Genuine ownership from the database layer to the user interface

• High self-responsibility in implementing new features

• Short decision-making routes and direct technical coordination

• The opportunity to actively shape architecture decisions

• A pragmatic, product-oriented working environment without concern mentality

• Ruom for your own ideas, automation, and modern development processes

• Firm employment with start at the next possible time

• Location Germany preferred, EU possible upon agreement

If you're interested in developing modern full-stack features with React, TypeScript, and .NET in a remote-first and KI-first environment, we look forward to your application.

We value self-organization, proactive communication, and a structured working method. We are looking for someone who takes responsibility, thinks holistically, and enjoys developing a software product over the long term.

We develop our product with great passion and are looking for someone who shares this enthusiasm and wants to further develop a really good solution for our customers together with us.