About the role
Job Application for Senior Frontend Engineer – Greenfield Product (Angular) at CarOnSale Senior Frontend Engineer – Greenfield Product (Angular) Berlin, Germany Apply Senior Frontend Engineer (Angular) – Greenfield Product Castle Tech GmbH – Berlin or Munich (Hybrid) We are building a new standalone product from the ground up and are looking for a Senior Frontend Engineer to help shape it. This is a high-impact role where you will influence system design, architecture, and product direction from day one. You will work closely with product and engineering to turn ideas into production-ready software while setting the foundation for how the system evolves. If you enjoy building products from scratch, designing clean architectures, and taking ownership of meaningful projects , this role will allow you to make a real impact. What You’ll Work On Build a new production-grade product from the ground up Design and implement a scalable frontend architecture using Angular and TypeScript Take ownership of features from concept to deployment Collaborate closely with product managers, designers, and backend engineers Contribute to technical architecture and system design decisions Help establish development standards, CI/CD pipelines, and engineering best practices Mentor other engineers through code reviews and technical feedback Continuously improve development workflows using modern tools and AI-assisted engineering AI-Augmented Engineering AI is part of how we work. We expect engineers to actively use modern AI tooling to improve productivity and quality . You should be comfortable: Using AI-assisted development tools in your daily workflow Writing effective prompts and evaluating AI-generated output critically Identifying AI limitations and failure modes Exploring modern AI workflows and tools This is not about blindly accepting AI suggestions — it’s about using AI thoughtfully to work smarter and build better systems . Your Skills Must Have 5+ years of experience as a frontend engineer Strong expertise with Angular (v11+) and TypeScript Experience designing scalable frontend architectures Strong understanding of software design principles and maintainable systems Experience with modern frontend tooling (NPM, Webpack or esbuild) Experience working with Git, CI/CD pipelines, and Docker Experience working in agile teams (Scrum or Kanban) Strong communication skills in English Nice to Have Experience with frontend testing frameworks (Jest, Cypress, Playwright) Experience building greenfield products or new platforms Familiarity with AI-related components such as RAG or vector databases Experience with Material Design or product-oriented UI development Conversational German What You’ll Own As a Senior Engineer , you will play an important role in shaping both the technology and the team . You will: Design systems with clear component boundaries and scalability in mind Identify technical risks and propose practical solutions Help improve the team’s engineering standards and productivity Mentor other engineers and contribute to technical decision-making Deliver high-impact features that support business and product goals Why Join Castle Tech? Build something new – work on a greenfield product from the start Real technical ownership – influence architecture and system design Modern engineering environment – use the latest tools and workflows Flexible hybrid work – office and remote options in Berlin or Munich Your gear, your choice – MacBook or Windows setup with the tools you need Growth and development – structured onboarding, feedback cycles, and coaching Collaborative team – ambitious engineers who enjoy building great products If you're excited about building a new product, shaping architecture, and working with a modern engineering team , we’d love to hear from you. Create a Job Alert Interested in building your career at CarOnSale? Get future opportunities sent straight to your email. Create alert Apply for this job * indicates a required field Autofill with MyGreenhouse First Name * Last Name * Email * Phone Country * Phone * Resume/CV * Attach Attach Dropbox Google Drive Enter manually Enter manually Accepted file types: pdf, doc, docx, txt, rtf Cover Letter Attach Attach Dropbox Google Drive Enter manually Enter manually Accepted file types: pdf, doc, docx, txt, rtf When would be your earliest possible starting date? * What would be your salary expectation? * Submit application Powered by Greenhouse
