Backend AI Developer with a Splash of MLOps (m/f/x)

ONTEC is your go-to specialist for business-critical systems. As a leading implementation partner, we help companies in digitizing their business-critical business processes, integrating AI solutions and operating their critical infrastructure. Our employees appreciate the excellent working atmosphere, the opportunity to get involved, to actively shape their role and to continuously develop professionally as well as personally.

To strengthen our team, we are looking for a responsible, accurate and solution-oriented

Backend AI Developer with a Splash of MLOps (m/f/x)

Place of employment: Homeoffice, 1020 Wien

As our Backend AI Developer with a Splash of MLOps, you’ll play a key role in building and maintaining the backbone of our AI systems. While your focus will be on backend development, you’ll also support MLOps and DevOps tasks to ensure smooth operations and deployments.

Your tasks as Backend AI Developer with a Splash of MLOps (m/f/x):

Backend Development: Implementation and maintenance of backend services, primarily in Python (FastAPI), to support AI tools and RAG systems.

• Backend Development: Building and maintaining backend services in Python (FastAPI) to support AI tools and systems.


• Prompt Engineering: Developing and optimizing prompts for AI models to improve performance and usability.


• Embeddings Expertise: Working with embeddings to enhance AI capabilities, such as search and recommendation systems.


• Database Management: Tweaking and managing databases (PostgreSQL) for efficient data storage and processing.


• Containerization: Deploying applications in Docker containers and managing them with Portainer.


• CI/CD Pipeline Management: Supporting the design, implementation, and maintenance of CI/CD pipelines using tools like GitLab and Jenkins.


• LLM Hosting: Hosting and optimizing large language models (LLMs) on GPUs (NVIDIA).


• Azure Kubernetes Service (AKS): Managing deployments on AKS and leveraging Azure OpenAI Services.


• Document Extraction: Development of solutions for extracting content from various document formats (e.g., PDF, MS Office).


• Testing and Quality Control: Conducting automated and manual tests to verify the quality of search and LLM results.


• Collaboration: Working closely with the AI team to integrate and deploy machine learning models into existing systems.


• Support and Troubleshooting: Assisting with the resolution of technical issues during the development and integration of AI tools and models.


• Optional: Model Training: Training models based on sample data.


• Just being awesome :-)

We’re looking for someone who’s passionate about technology, loves learning new things, and can juggle backend development with a splash of MLOps.

What you should bring:

Must:

• Backend Development Expertise: Strong Python skills, especially with FastAPI.


• CI/CD Knowledge: Experience with CI/CD tools like GitLab, GitHub, Azure Container Registry and Jenkins, and the ability to support and maintain pipelines.


• Database Knowledge: Experience with SQL and NoSQL databases, particularly PostgreSQL.


• Docker Proficiency: Ability to create and optimize Docker containers.


• LLM Hosting Experience: Familiarity with hosting and optimizing large language models on GPUs (NVIDIA).


• Prompt Engineering: Experience in developing and optimizing prompts for AI models.


• Embeddings Expertise: Knowledge of working with embeddings for tasks like semantic search and recommendations.


• Azure Knowledge: Experience with Azure Kubernetes Service (AKS) and Azure OpenAI Services.


• Testing Skills: Solid experience in automated and manual testing.


• Language Skills: Excellent English skills, both written and spoken.

Nice-to-have:

• Frontend Basics: While not a focus, some knowledge of Angular or other frontend frameworks is a plus.


• Cloud AI Models: Experience with integrating OpenAI or other cloud-based AI models.


• Language Skills: Good German skills, both written and spoken (and if you speak Viennese, even better).


• Foosball Wizardry: Because we take our office tournaments seriously.

Our employees value our holocratic organization and the associated Safe-Enough-To-Try culture, which allows everyone to do what they do best while shaping the organization from within. We do everything we can to provide our employees with an environment in which they feel comfortable.

Of course, you can expect an attractive salary in line with the market (well above the legal minimum salaries). In addition, we offer you much more, e.g.

• Possibility of a 4-day week


• Trusted working hours


• Homeoffice-first working model


• Extra vacation days


• Public transport ticket or, subject to availability, a company parking space


• Employee pension insurance


• Very good training and further education opportunities


• Lots of fun


• Various company events


• After-work sessions


• and much more

We value diversity and live it. Especially in the development of business-critical AI solutions, it is important to consider the most varied perspectives and realities of life! Accordingly, we welcome all qualified applicants, regardless of gender, age, ethnicity, religion or belief, sexual orientation, or disability. Whether you think pineapples belong on pizza is another matter, though.

Important Note: Today is November 5th, 2025. Due to organizational reasons, we won’t be able to review applications or schedule interviews until January 2026. If you’re the right fit, we’re looking to hire someone in March 2026 (or February if we find you early). So, please be patient with us—we promise it’ll be worth the wait!

If this sounds like your kind of challenge, we’d love to hear from you. Please include a list of projects (with technologies used) in your resume.

We are looking forward to meeting you!