Senior Fullstack Engineer

ABOUT THE ROLE

We are a fast-growing, seed-stage European AI SaaS company building an AI-powered phone assistant platform used by thousands of small and medium-sized businesses across Europe. Our product automates inbound calls — handling customer inquiries, booking appointments, processing orders, and more — with a strong focus on GDPR compliance and a European-first approach.

As a Senior Fullstack Engineer, you will take end-to-end ownership of product features that deliver measurable value to customers. You'll work in a remote-first, high-autonomy environment where shipping and customer impact matter more than meetings. Native-level German proficiency is required for this role, as the product serves German-language markets.

WHAT YOU'LL DO

• Own features from idea and prototype through architecture, implementation, and release.
• Engage continuously with customers, partners, and sales to surface real pain points.
• Run product discovery by forming hypotheses and validating them with quick, lightweight experiments.
• Instrument relevant metrics to enable data-driven decisions in your product area.
• Build pragmatic, scalable software balancing immediate value with long-term maintainability.
• Communicate asynchronously where possible and prioritize shipping over excessive meetings.
• Act with radical ownership — push initiatives forward without waiting for permission.
• Work remotely with CET overlap, with occasional option to work from the Vienna office.

WHAT WE'RE LOOKING FOR

Required (Dealbreakers)

• 5+ years of experience in fullstack engineering with end-to-end delivery responsibility.
• Strong hands-on experience with Node.js, TypeScript, NestJS, and React.
• Native-level German language proficiency (essential for the product and customer context).

Also Required

• Experience with product discovery — forming hypotheses and validating them quickly through experiments.
• Track record of identifying, collecting, and using metrics to support data-driven product decisions.
• Experience collaborating with customers, partners, and sales to understand pain points and define value.
• Experience delivering end-to-end software from architecture decisions through to customer-facing releases.

Nice to Have

• Experience integrating LLMs (e.g., OpenAI) into production software applications.
• Experience deploying AI-enabled services on Microsoft Azure in European environments.
• Familiarity with GDPR and EU AI Act considerations for AI services.
• Prior experience in a high-growth startup environment.

LOCATION & WORK ARRANGEMENT

• Fully remote — remote-first culture with CET timezone overlap expected.
• Option to work from the Vienna, Austria office as needed.
• Visa sponsorship is not available.

COMPENSATION & BENEFITS

• Salary range: $80,000 – $120,000 USD annually.
• High-autonomy, low-bureaucracy remote-first work environment.
• Direct impact on a product used by thousands of European businesses.
• Work alongside a team with backgrounds at leading enterprise tech and SaaS companies.