Founding Product Engineer

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the RoleWe're a fast-growing, Vienna-headquartered AI communication startup building an AI phone assistant platform for SMEs across Europe — and we're looking for a Founding Product Engineer to join our engineering team

This is a high-ownership, end-to-end role at the intersection of product thinking and full-stack engineering.

You'll help shape the product from hypothesis to production, working closely with customers, partners, and sales to deliver features that create real, measurable business value.

We're a remote-first team with an optional office in Vienna.

You'll need meaningful overlap with Central European Time (CET).

Our product is German-language-first, so native-level German proficiency is essential.

What You'll DoOwn features end-to-end — from hypothesis and prototype through architecture, implementation, and production release.

• Lead product discovery by designing and running rapid experiments to validate ideas before committing to large-scale builds.
• Maintain close, recurring contact with customers, partners, and the sales team to surface real pain points and translate them into product decisions.

Design and implement tracking and analytics to enable data-driven iteration.

Drive architecture choices across the full stack and take responsibility through to release.

Prioritize pragmatic, scalable solutions that balance speed of validation with long-term quality.

Take radical ownership of your initiatives — move things forward without waiting for sign-offs.

What We're Looking ForMust-haves (dealbreakers):3+ years of experience in Product Engineering delivering end-to-end software features.

Strong full-stack proficiency: Node.

js, TypeScript, NestJS, and React.

Native-level German fluency (Deutsch auf Muttersprache-Niveau) — essential for our German-language product and customer interactions.

Required:Experience integrating software with external systems (CRMs, calendar tools, databases, APIs).

Ability to gather customer feedback and convert pain points into pr.