Senior Fullstack Engineer

 Posted 9 hours ago
     
 $80000 - $120K per year
  
5-10 years experience
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AI Summary

You will take end-to-end ownership of product features from prototyping to release while collaborating with customers and sales to address pain points. The role involves building scalable software and using data-driven metrics to validate product hypotheses.

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.

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