Mid-Level Front End Engineer [AdTech focus] (f/m/d)

We are looking for a Front End Engineer to join our cross functional Core Experience team and help them help our neighbors connect with one another!

Technical Stewardship

• Take ownership of the frontend architecture and technical direction of the Core user experience team, ensuring scalability, performance, reliability, and long-term maintainability.

• Be an active participant in  the evolution of our React-based frontend, including state management, SSR in Node.js, and build tooling (Vite, Webpack, Rollup, CI/CD).

•  Uphold  engineering standards for clean code, testing, performance, accessibility, and security.

• Participate in technical decision-making and ensure alignment with backend, platform, and product architecture.

Delivery & Execution

• Collaboratively deliver outcomes with your cross functional team: planning, prioritisation, predictability, and quality.

• Commit to user value deliveries each sprint and consistently meet those commitments.

• Work closely with Product Management and Design to translate business and user needs into executable technical roadmaps.

• Balance technical debt, platform evolution, and feature delivery in a sustainable way.

• 3-7 years of experience building robust, scalable, and performant web applications using React and the modern JavaScript/TypeScript ecosystem.

• Good understanding of HTTP and how web requests work including headers, status codes and how data flows between client and server

• Experience with topics in our environment:

• Braze

• Google Ads Manager

• Google Tag Manager

• Cookieless Targeting

• EUID implementations

• Deep understanding of React, state management patterns (e.g. Redux or alternatives), and frontend architecture principles.

• Hands-on experience with technical integration of advertising platforms, including ad serving, tracking implementation, and tag management.

• Experience with Server-Side Rendering (e.g. Node.js), modern build tooling (Vite, Webpack, Rollup), and CI/CD pipelines.

• Proven ability to collaborate closely with UX/UI designers, backend engineers, and product managers.

• Strong ownership mindset: you care about outcomes, not just output.

• Excellent English skills for working in our international team; German is a plus.

• A meaningful role with purpose – we create a great product that delivers real value to local communities

• Working in a cheerful and experienced team that actively exchanges knowledge and learns from one another

• A high level of responsibility and ample opportunities to actively contribute and make an impact

• Your nebenan.de SpenditCard – you receive an additional €35 per month to spend on benefits of your choice

• 30 days of paid vacation per year, plus the option for workation models and a sabbatical

• A strengths-based development culture (we work with the Gallup StrengthsFinder)

• A workplace in Berlin-Kreuzberg and regular events such as Lunch Roulette, Lunch & Learn, and Yoga

• A hybrid working model combining office and remote work days