Key Account Customer Success - B2B SaaS - WIEN - Top Startup - (m/w/d)
On-siteWien, Missouri, United States or Wien, Wisconsin, United States
Job Summary
Manage your portfolio of 80-120 SMB and Enterprise ecommerce clients autonomously, owning the full lifecycle from onboarding and tech support to upselling and cross-selling. Directly solve client issues without waiting for others, acting as a strategic partner to drive measurable success while getting hands-on with operations and product feedback loops. Collaborate with product and solutions engineering teams to align on interdepartmental work. This role requires living in Vienna or relocating there, with fluency in German and English mandatory. Candidates must understand API calls, webhooks, JSON, and LLM prompting, demonstrating high stress resistance and self-management. Join a bootstrapped startup with €6.1M ARR focused on e-commerce brands in the B2B SaaS space, where speed and direct impact on the product define the culture.
Required Qualifications
- Living in Vienna or ready to relocate to Vienna
- Good understanding of how API calls and webhooks work
- Ability to read and understand JSON and API documentation
- Practical experience in how to prompt LLMs correctly
- Fluency in both German and English (spoken and written)
- High stress resistance
- Strong communication and organizational skills
- Self-managed, disciplined, proactive
- Genuine interest in tech, startups, and building something meaningful
Desired Qualifications
- Additional language (beyond German and English)
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