Senior Frontend Engineer at TextCortex AI

Are you a senior developer who crafts elegant frontends with React & TypeScript, and thrives in an engineering culture of innovation and ownership? At TextCortex AI, you'll join a core team of ambitious builders on a mission to transform how organizations harness AI. We've scaled from a few thousand users to millions in just two years, earning recognition as a Top 10 AI product of 2025 on G2 and serving over 2 million users. As a Senior Frontend Engineer, you will have a massive impact on a product at the forefront of AI - all while working side by side with passionate engineers in Berlin who set a high bar for code quality, product thinking , and continuous improvement.

Tasks

Lead Frontend Development: Own the design and implementation of intuitive, responsive UIs for our AI knowledge platform using React and TypeScript , impacting thousands of users daily from day one.

Feature Ownership: Work closely with product and design teams to translate user needs into features - from concept, through architectural design, to polished release. You'll build everything from rich web app interfaces to Chrome extension features, with an eye for detail and robustness.

Code Quality & Performance: Write clean, maintainable code and unit tests, and conduct peer code reviews to ensure a high-quality codebase. Optimize for performance and scalability so our frontend remains fast and stable as usage grows.

Cross-Stack Collaboration: Collaborate with backend engineers to integrate APIs seamlessly and influence overall architecture. You'll frequently dive into the full stack to ensure end-to-end excellence in delivering features.

Innovation & Improvement: Continuously improve our frontend tooling and developer experience. We experiment with new technologies - even leveraging AI coding agents like Cursor to complete complex tasks in hours - so you'll be encouraged to automate, innovate, and bring in best practices that push our velocity and quality forward.

Mentorship: As a senior member, guide and mentor junior developers by sharing knowledge and leading by example. Foster an environment where "no endless meetings, no debugging marathons - just shipping great code" is the norm.

Requirements

Technical Skills & Experience:

• Expertise in React & TypeScript: You have extensive experience (5+ years or equivalent skill) building modern web applications with React. You're