Senior Frontend Engineer

Senior Frontend Engineer at Text Cortex AI

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Are you a senior developer who crafts elegant frontends with React & Type Script, and thrives in an engineering culture of innovation and ownership? At Text Cortex 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.

• Lead Frontend Development: Own the design and implementation of intuitive, responsive UIs for our AI knowledge platform using React and Type Script, 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. 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, conduct peer code reviews to ensure a high-quality codebase, and 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, frequently diving into the full stack to ensure end‑to‑end excellence in delivering features.
• Innovation & Improvement: Continuously improve our frontend tooling and developer experience. Experiment with new technologies – even leveraging AI coding agents like Cursor to complete complex tasks in hours – and bring in best practices that push our velocity and quality forward.
• Mentorship: Guide and mentor junior developers by sharing knowledge and leading by example, fostering an environment where “no endless meetings, no debugging marathons – just shipping great code” is the norm.

• Expertise in React & Type Script: 5+ years or equivalent skill building modern web applications with React, fluent in Type Script and care about type‑safe, well‑structured code.
• Frontend Architecture: Deep understanding of state management (hooks, context, etc.), component design, and performance optimization; design architecture that scales to large, complex applications without sacrificing maintainability.
• Quality Mindset: Commitment to code quality – write clean, readable code, cover critical logic with tests, drive code reviews, uphold a high engineering standard.
• User‑Centric Approach: Eye for great UI/UX, empathy for the end user, and strive to make it delightful and intuitive beyond just making it work.
• Debugging & Problem Solving: Quickly diagnose and fix issues across the stack, comfortable with browser dev tools, performance profiling, resolving tricky async bugs or memory leaks in a complex SPA.
• Tooling & Workflow: Proficiency with modern development tools (Git, CI/CD pipelines, testing frameworks); bonus for using AI‑based dev tools like Git Hub Copilot or Cursor.
• Full‑Stack Familiarity (Bonus): Navigate backend code when needed; experience with Node.js, REST/Graph
  
  QL APIs, or cloud infrastructure is a plus.

• Urban Sports Club membership – for free! Full access to Berlin’s best gyms, studios, and sports facilities.
• Stock options in one of Europe’s hottest AI startups – share in our journey and success as we scale.
• The chance to work side‑by‑side with a highly ambitious, talented team at the cutting edge of AI.
• An agile, product‑driven culture with low bureaucracy and high ownership.
• Support for your personal and professional growth, including new tools, courses, or events.
• Relocation and onboarding assistance for candidates moving to Berlin.

Product‑First Mentality: You care about why…