Product Engineer

Product Engineer (m/f/d) | Berlin (hybrid) or Remote (CET ±2h)

Ojin builds the infrastructure that makes AI feel human: real-time AI agents with natural, lifelike conversation on a globally distributed GPU fabric. After five years proving this works for enterprise customers, we're opening it up as a developer platform, and this is the team that will build it from the ground up.

What you'll do:

You'll own features end-to-end, from interactive frontends through to Python-based agentic backends, working directly with the founders on a 15-person team. You help define the solution, design the architecture, and ship it. This includes full-stack web development and building the Python backends for our AI capabilities, including proxy services, agentic systems, and conversational AI flows.

Stack: TypeScript, React, Node.js, Python, WebRTC, WebSockets, AWS (Infrastructure-as-Code / AWS CDK).

What we're looking for:

• 3-5+ years of professional experience
• Genuine full-stack ability (React/TypeScript + Node.js), plus Python proficiency
• Startup experience
• Real enthusiasm for building AI products
• Fluent English

We're not able to offer relocation or visa sponsorship. If you're already in Berlin, this is a hybrid role. If you're elsewhere, we're open to fully remote within CET ±2h.

Perks: 28 days vacation, €900 annual education budget, home office equipment, remote-first culture.