Senior Backend Developer

Company

We are a Berlin-based B2C fintech operating in stealth, founded by two repeat founders (YC alum, exit) with prior 10+ year careers in investment banking and strategy consulting, respectively. We recently raised investment to assemble a 15 people, exceptionally strong core team.

Our culture is built on ownership and clarity. We align with you on vision, then set KPIs and required resources together—and then trust your drive and expertise.

The Opportunity

As a Senior Backend Developer / AI Engineer, you will work alongside our CTO on building and evolving our AI-powered fintech product. The core architecture is in place, providing a solid foundation to build upon as we integrate advanced LLM capabilities, establish AI pipelines, implement intelligent automation, and ship production-ready AI features. You'll be instrumental in shaping how we leverage AI to transform financial services, with significant autonomy to design and implement cutting-edge solutions.

Tasks

What you will work on on daily basis

• Designing and implementing LLM-powered features and intelligent automation workflows
• Building robust AI pipelines with proper orchestration, error handling, and monitoring
• Developing RAG (Retrieval-Augmented Generation) systems for financial data processing
• Implementing and optimizing vector search and embedding strategies
• Creating evaluation frameworks for LLM outputs and maintaining quality standards
• Building prompt management systems and optimizing LLM interactions for cost and performance
• Integrating multiple AI models and managing model versioning / deployment
• Ensuring AI safety, reliability, and compliance in financial applications

Requirements

Hard Requirements

Additional Technical Skills

Mindset & Approach

Benefits

Compensation & How We Work

We're an equal opportunity employer. We value diversity and are committed to creating an inclusive environment for all employees. If you're excited about the role but don't meet 100% of the criteria, we'd still love to hear from you—particularly if you bring unique perspectives or experiences that would strengthen our team.