Senior Frontend Developer mit UX-Mindset (d/m/w)

📍 Job Overview

Job Title: Senior Frontend Developer with UX Mindset (d/m/w)

Company: Haufe Group (Lexware)

Location: Freiburg im Breisgau, Baden-Württemberg, Germany

Job Type: Full-time

Category: Frontend Development, UX/UI, AI Integration

Date Posted: June 10, 2026

Experience Level: Professional (5-10 years)

Remote Status: Hybrid

🚀 Role Summary

• Develop high-performance, AI-powered web applications with a strong emphasis on user experience and social media interaction.

• Integrate cutting-edge Large Language Models (LLMs) directly into the user interface to enhance functionality and engagement.

• Act as an AI Agent Coordinator, orchestrating the behavior of AI agents to align seamlessly with frontend logic and business objectives.

• Contribute to a forward-thinking team focused on leveraging AI and intelligent technologies for business success within the Lexware product suite.

• Drive innovation in the social media space by making content more intelligent, personalized, and interactive for small and micro-businesses.

📝 Enhancement Note: This role is positioned within "Team KIM (Team KI-Marketing)" at Lexware, a division of Haufe Group, specifically focusing on developing an AI-based agent for social media success. The core of the role involves blending advanced frontend development with a deep understanding of AI integration, particularly LLMs and AI agent orchestration, to create user-centric solutions. The "d/m/w" designation (deutsch/männlich/weiblich) indicates an inclusive hiring practice common in Germany.

📈 Primary Responsibilities

• Architect and build performant, scalable, and modular frontend components using React and TypeScript, adhering to best practices for maintainability and reusability.

• Design and implement intuitive user interfaces that deliver exceptional user experiences, ensuring that AI-driven features are both functional and delightful for customers.

• Integrate and manage Large Language Models (LLMs) to power intelligent features within web applications, focusing on seamless API interactions and responsive UI updates.

• Coordinate and orchestrate AI agents, ensuring their output and behavior are effectively translated into frontend interactions and user flows.

• Collaborate closely with product managers, backend developers, and AI specialists to define requirements, iterate on designs, and deliver integrated solutions.

• Champion the Minimum Viable Product (MVP) approach to rapidly gather user feedback and iterate on features, fostering a culture of continuous improvement and agile development.

• Contribute to backend development (Java/Spring Boot) and cloud architecture (AWS) where necessary, to support the end-to-end development of holistic solutions.

• Actively participate in team discussions, code reviews, and knowledge-sharing sessions to foster a collaborative and innovative development environment.

• Ensure high code quality, testability, and performance optimization for all frontend deliverables.

📝 Enhancement Note: The responsibilities highlight a dual focus on advanced frontend development (React, TypeScript) and the direct integration and orchestration of AI technologies (LLMs, AI Agents). This suggests a role that is not just about building interfaces, but about shaping how AI interacts with users, requiring a strong understanding of both technical implementation and user psychology. The mention of backend (Java/Spring Boot) and cloud (AWS) knowledge as a preference indicates potential for full-stack contribution and a need for understanding the broader technical ecosystem.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong academic foundation or equivalent practical experience in Computer Science, Software Engineering, or a related field is expected for a Senior-level role.

Experience: Minimum of five years of professional experience in frontend development, with a significant portion focused on modern JavaScript frameworks.

Required Skills:

• Minimum five years of hands-on experience with React for building complex web applications.

• Proficient in TypeScript, including experience with type definitions, interfaces, and advanced type system features.

• Deep understanding of User Experience (UX) principles and best practices, with a proven ability to translate user needs into intuitive interface designs.

• Experience with integrating external APIs and services, particularly those related to AI and Machine Learning.

• Demonstrated ability to implement and coordinate AI agents, understanding their operational logic and frontend integration requirements.

• Strong command of German language (minimum C1 level) for effective communication within the team and company.

• Familiarity with agile development methodologies (e.g., Scrum) and a commitment to the MVP approach.

• Proactive, results-oriented, and self-driven work ethic with a passion for innovation and new technologies.

• Excellent problem-solving skills and a structured approach to complex project management.

• Strong team player with excellent communication, collaboration, and knowledge-sharing capabilities. Preferred Skills:

• Experience with backend development, specifically Java and Spring Boot.

• Knowledge of cloud platforms, particularly AWS, for deploying and managing applications.

• Familiarity with modern CI/CD pipelines and tools.

• Experience with UI testing frameworks and methodologies.

• Understanding of AI/ML concepts beyond basic integration, such as model training or data preparation.

📝 Enhancement Note: The requirement for 5+ years of experience in React and TypeScript, coupled with deep UX understanding and AI agent coordination, positions this as a senior-level role demanding not just coding proficiency but also strategic input into product development. The mandatory C1 German proficiency is a critical filter for candidates. The preference for Java/Spring Boot and AWS suggests that candidates with full-stack capabilities or a strong understanding of the broader tech stack will be highly valued.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase of at least three complex frontend projects built with React and TypeScript, demonstrating modular component architecture and efficient state management.

• Examples of user interfaces designed with a strong focus on user experience, highlighting how user needs were identified and addressed.

• Case studies or project descriptions detailing the integration of external APIs or services, ideally including AI/ML components.

• Demonstrations of how AI agents or similar systems were coordinated or integrated into a user-facing application, explaining the technical approach and impact.

• Projects that exhibit a clear understanding of the MVP approach, demonstrating iterative development and learning from user feedback. Process Documentation:

• Evidence of participation in or leadership of agile development processes, such as sprint planning, daily stand-ups, and retrospectives.

• Documentation or examples of how user feedback was collected, analyzed, and incorporated into the development lifecycle.

• Examples of how performance optimization and code quality were maintained across projects, possibly through code reviews, testing strategies, or CI/CD implementation.

📝 Enhancement Note: For a senior frontend role with AI integration, the portfolio should go beyond just showcasing UI. It needs to demonstrate the candidate's ability to architect complex systems, integrate advanced technologies like LLMs, and manage the interaction between AI components and the user interface. The emphasis on