Freelance - (Senior) Software Engineer - UnzerGPT Project

About Us

Unzer is a leading European fintech company with a mission to simplify international payments for e-commerce and retail businesses. Our brand was formed from 13 companies that now contribute to building a unique product covering the entire payment flow.

At Unzer, we are driven by the belief that customers should enjoy a seamless shopping experience, no matter where they choose to shop. We are a team of over 750 experts of 55 different nationalities, dedicated to creating a state-of-the-art unified commerce platform. Our goal is to enable businesses to delight their customers with a seamless payment experience.

Whether you're a tech enthusiast, payment expert, or a dedicated support professional, we are looking for individuals who are passionate about making a difference.

Our offices: We are based across Austria, Denmark, Germany, and Luxembourg with a HQ in

Berlin.

About The Project

UnzerGPT is Unzer's cutting-edge Generative AI initiative, powered by Large Language Model (LLM) , designed to transform how users access and leverage information. Initially developed as an AI-driven assistant for internal employees, it provides accurate answers to inquiries about company policies, procedures, and resources, while offering advanced document search capabilities for efficient information retrieval. Built with scalability in mind, UnzerGPT is poised to expand its support to merchants and other stakeholders, delivering impactful solutions and enhancing productivity across diverse audiences.

As a Software Engineer , you will take full ownership of developing the UnzerGPT application. This hands-on role encompasses backend and frontend development, AI model integration, and delivering a seamless user experience. You’ll work independently, driving the project from concept to completion.

Please note: Residency within the EU is a requirement for this position.

What You Will Do

• Architect, develop, and maintain scalable backend systems and APIs for the UnzerGPT application.
• Integrate and optimize Generative AI models into the application, ensuring efficient and effective usage.
• Translate project requirements into technical specifications, working closely with stakeholders and the Director of Engineering.
• Manage the complete software development lifecycle independently, from development to deployment and maintenance.

What you need to be successful in this role:

• Proficient in Python with extensive experience in backend systems and AI/ML integration (4y+).
• Strong expertise in client-server architecture and API development (REST/GraphQL).
• Proven experience deploying and scaling AI applications in production environments.
• Familiarity with cloud platforms (AWS preferred) and containerization tools like Docker or Kubernetes.
• Excellent problem-solving skills, self-driven with a strong sense of ownership.