Senior Fullstack Engineer - Inventory Engineering Team

Overview

Fullstack Engineer (Angular + Node.js)

CarOnSale is a start-up in the heart of Berlin. As a tech company, we have made it our mission to enable smooth digital processes in the automotive trade across Europe. Join us and develop new, innovative solutions for the B2B sector.

We are looking for a Fullstack Engineer to join our Inventory team in Berlin. This role focuses on building and optimising robust, scalable web applications that drive user engagement and product growth. You’ll work across the stack, with a strong focus on Angular (frontend) and Node.js / NestJS (backend) , shaping our platform and collaborating closely with designers, product managers, and other engineers.

Your Tasks

• End-to-End Development : Build, maintain, and optimise both frontend (Angular) and backend (Node.js, NestJS, PostgreSQL) components of our platform.
• Architecture & Feature Development : Take ownership of feature design and implementation, ensuring scalability and performance across the fullstack.
• Mentor and Develop Team Members : Guide less experienced engineers, sharing expertise in fullstack development and promoting best practices.
• Define Standards : Work with cross-functional teams to define coding standards, ensure code quality, and establish efficient CI/CD pipelines.
• Collaborate Across Teams : Partner with design, product, and backend specialists to create seamless user experiences and smooth data flows.
• Challenge & Innovate : Actively contribute ideas, challenge concepts, and influence fullstack development strategies, including frontend performance optimization.

Your Profile

• 5+ Years of Software Engineering Experience : Extensive experience in fullstack development , building scalable, high-performance web applications.
• Frontend Expertise : Strong knowledge of Angular (TypeScript, RxJS, NgRx or similar state management).
• Backend Expertise : Proficiency with TypeScript, Node.js, NestJS, and PostgreSQL .
• Mentorship Skills : Experience coaching and mentoring other engineers, fostering knowledge-sharing and best practices.
• SCM and CI/CD Knowledge : Skilled in Git, Docker, and CI/CD pipelines.
• Agile Experience : Familiar with Scrum or Kanban frameworks, using tools like JIRA and Confluence.
• Communication Skills : Excellent English communication skills for cross-team collaboration.
• Autonomous and Growth-Oriented : Ability to work independently and ambition to grow into senior, architectural, or leadership roles.

Nice to Have

• Conversational German skills
• Experience in the Automotive industry

Why COS?

• Impactful Role : Be part of shaping the future of Europe’s automotive market through innovative digital solutions.
• Professional Development : Detailed onboarding, feedback cycles, and coaching to support your growth.
• Choose Your Gear : Work with the hardware and tools you prefer—MacBook or Windows laptop.
• COS Culture : Join a motivated, diverse, and inclusive team with ambitious goals, fun events, and a unique team spirit.

If you’re excited about making an impact with cutting-edge fullstack technologies and building solutions that drive engagement and growth, we’d love to meet you!

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