Senior Product Engineer (m/f/d)

Overview

Journee is a technology startup founded in 2020. Our in-house low-latency streaming technology and GPU fleet orchestration systems are the engines behind award-winning work with brands such as BMW, H&M, and Siemens.

We are now building and launching Ojin, a real-time generative AI platform for developers.

Location: Berlin, Germany (Remote or in-office)

As a Senior Product Engineer, you will not just write code—you will own products and features end-to-end. You will work directly on Ojin, building everything from high-end interactive frontends to complex backend agentic systems.

Responsibilities:

• Drive features and projects from abstract concepts to production deployment
• Architect and build core web infrastructure using TypeScript, React, and Node.js
• Develop and maintain Python backends for AI capabilities, including proxy services, agentic systems, and conversational AI flows
• Design scalable backend systems and drive architectural decisions
• Collaborate closely with founders, designers, and other engineers

Requirements:

• 8+ years of professional software development experience
• Startup experience is a must
• Expert-level skills in Frontend (React, TypeScript) and strong competence in Backend (Node.js, TypeScript)
• Proficient in Python and experience building backend systems for AI agents
• Enthusiastic about UI/UX, product design, and making trade-offs that benefit users