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Taxfix is a fintech/tax software company that has facilitated over €3.5 billion in tax refunds since 2016, operating across Germany, Spain, and the UK with 400+ professionals. The company is rebuilding its marketing operating system around an AI-first, agentic-first way of working.
In this founding-engineer role, you will design and build the automation layer and agentic operating model for Taxfix's marketing organization. You'll embed with cross-functional teams (Creative Studio, User Acquisition, CRM, SEO/AEO, Analytics) to identify bottlenecks and remove them through advanced automation systems.
Key responsibilities include:
- Designing the agentic operating system that powers marketing workflows
- Building advanced multi-step agent harnesses with orchestration, tool interfaces, guardrails, memory, and evaluation loops
- Automating complex workflows across creative production, channel operations, and analytics
- Owning architecture decisions: building custom software where needed, leveraging no-code solutions where ROI justifies it
- Systematizing and scaling automation patterns across teams
- Coaching marketers to become builders, enabling the organization's shift to AI-first operations
You are a rare hybrid: roughly one-third marketing sense, one-third software engineering (or advanced marketing automation), and one-third analytics/data. You either come from software engineering with interest in growth/marketing, or from MarTech/marketing automation with full-stack engineering capability. You have shipped systems end-to-end, not just configured them. You're comfortable with ambiguity, high agency, low ego, and genuinely obsessed with AI capabilities and their application to real work.
Required experience:
- Track record building internal tools, automation pipelines, or backend integrations that measurably changed how work gets done
- Hands-on experience with modern AI-assisted build tools (Claude Code, agent frameworks, model APIs)
- Fluency with REST APIs, webhooks, data pipelines, and platform integrations (creative suites, ad networks, CRM systems)
- Solid grounding in analytics and data management for marketing operations
