Senior AI Engineer

Who we are

flatexDEGIRO AG operates the leading and fastest growing online brokerage platform in Europe. Based on modern, in-house state-of-the-art technology, customers of the flatex and DEGIRO brands are offered a wide range of independent products with execution on top TIER 1 exchanges. The technological edge, high efficiency and strong economies of scale enable us to continuously improve our service offering for clients and to set leading standards in terms of product, price and platform quality.

With more than 3 million customer accounts and more than 63 million securities transactions processed in 2024, flatexDEGIRO is the largest retail online broker in Europe. In times of bank consolidation, growing digitalization and the immanent need of millions of Europeans to take their financial future into their own hands, flatexDEGIRO is ideally positioned for further profitable growth.

Want to know what it’s like to work for flatexDEGIRO?

Check out our Instagram @lifeatflatexdegiro and meet the great people that makes us who we are! Do you already see yourself as part of this team? Apply!

The Senior AI Engineer will play a pivotal role in transforming early AI experiments—including RAG pipelines, LLM-based solutions, and proof-of-concept models—into secure, scalable, and production-ready services. Acting at the intersection of Data Science and DevOps, this role builds and operates the technical backbone that allows AI prototypes to be evaluated, optimized, deployed, and monitored reliably across our on-prem infrastructure in line with strict IT governance and regulatory standards.

This is what you’ll do:

• Design, build, and maintain CI/CD pipelines and Helm-based deployment frameworks for AI and machine learning services running on on-prem infrastructure.
• Package, deploy, and operationalize retrieval-augmented generation (RAG) applications, LLM-based services, and other AI workloads as reproducible, scalable components.
• Run hands-on evaluation, benchmarking, and prototyping of LLMs, embeddings, vector stores, and prompt-engineering approaches to inform production decisions.
• Develop robust monitoring, observability, evaluation, and automatic rollback mechanisms to ensure stable operations of AI workloads in production-like environments.
• Build and maintain integration layers (APIs, connectors) between AI systems, data pipelines, and other corporate applications.
• Support the full AI/ML model lifecycle—from experimentation and validation to production hardening and handover—using DevOps and MLOps best practices.
• Collaborate with security, architects, and IT operations to align AI deployments with infrastructure, compliance, and risk management frameworks.
• Assist in extending AI capabilities to governed cloud environments such as Microsoft Copilot Studio or Azure OpenAI where appropriate.

You’ll bring us these skills:

• 6–10 years of experience in software engineering, data engineering, or applied machine learning within a corporate or regulated IT environment.
• Strong experience designing and automating CI/CD pipelines (GitLab, Jenkins, Azure DevOps).
• Hands-on experience with Helm, Kubernetes, Docker, and containerized application deployment.
• Practical experience with RAG architectures, LLM-based systems, vector databases, and frameworks such as LangChain or similar.
• Ability to run evaluations, benchmarks, and rapid prototypes of LLMs, embeddings, and AI workflows.
• Strong proficiency in Python and scripting for automation, orchestration, and system integration.
• Understanding of on-prem AI infrastructure, enterprise-grade hardware platforms, and hybrid (on-prem + cloud) environments.
• Solid grasp of security, governance, and data privacy requirements in regulated financial environments.

Interested? This is what we offer you:

• Promise of a good work-life balance.
• 30 days paid leave.
• Personal and professional development with access to relevant courses.
• Opportunities for career development.
• Additional health insurance Luxe package (covering children under 18, dental and vision care).
• Best Doctors’ health insurance providing access to the best medical treatment worldwide.
• A challenging full-time job in an international and fast-growing company.
• A competitive salary.
• Food vouchers.
• The opportunity to participate in a new, enthusiastic team of likeminded professionals.

To make your life easier

You get the freedom to work flexible. Meaning you don’t have to work in our office every day, but we like it if you do of course! It’s fun to come in and mingle with your colleagues. There is also fruit, good coffee, drinks & snacks every day. Our beautiful and modern office is located in the iconic Millennium Center Building at the heart of Sofia that is conveniently next to Nation Palace of Culture (NDK) station.

To make working from home comfortable we offer a 50 BGN internet allowance, provide a company laptop and many options to make your work@home comfortable, such as a chair, screen and headphones. And last but not least: a fully covered Sports card we provide is an easy way to get into shape!

Want to invite your friends to work for us as well? A generous referral bonus will be yours if they get hired, so spread the word once you start.

All qualified applicants will receive consideration for employment without regard to ethnicity, color, religion, age, sex, national origin, disability, sexual orientation, gender identity/expression, or any other legally protected status. flatexDEGIRO is an Equal Opportunity Employer.