# AI Engineer Middle / Middle+ [AI Team] at Plata Card

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design, build, and maintain AI/ML pipeli

- **Company:** Plata Card (https://jobs.trythestack.co/companies/plata-card)
- **Location:** Germany
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 2–5 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Python, LLMs, Prompt engineering, ML pipelines, RAG, LangChain, LlamaIndex, MLflow, AWS, Go, OCR, A/B testing, CI/CD, Data retrieval, Model integration
- **Posted by employer:** 2026-08-04
- **Added to The Stack:** 2026-08-08
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://plata.careers/vacancy/details?id=4822359008&gh_jid=4822359008 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/ai-engineer-middle-middle-ai-team-plata-card

## About the role

Responsibilities:
- Design, build, and maintain AI/ML pipelines around LLMs, including model selection, configuration, and wrapper layers.
- Implement RAG-oriented data retrieval systems and optimize retrieval for accuracy and efficiency.
- Develop and refine OCR solutions to extract, validate, and normalize entities from business documents.
- Run experiments and A/B tests to evaluate prompts, model variants, and pipeline changes; measure and report key metrics.
- Collaborate with backend and LLM engineers: review code, integrate models, and ensure production readiness (CI/CD, monitoring).

Requirements:
- Hands-on experience with LLMs, prompt engineering, and building ML pipelines.
- Practical experience with evaluation metrics and A/B testing for ML-driven features.
- Strong Python skills and experience delivering production-grade software (CI/CD, monitoring, lifecycle ownership).
- Familiarity with RAG tools and frameworks (e.g., LangChain, LlamaIndex) and with commercial and open-source LLM providers.
- Ability to prioritize hypotheses, justify model/method choices, and architect efficient solutions.
- Strong communication skills and B1+ English for cross-functional collaboration.

## Responsibilities

Develop and manage AI/ML pipelines using Large Language Models while focusing on model selection, configuration, and RAG-oriented data retrieval. Implement advanced OCR solutions and design experiments to evaluate model performance and drive product improvements.

## Requirements

Requires hands-on experience with LLMs, ML pipelines, and Python, along with a strong understanding of quality evaluation metrics and A/B testing. Candidates must possess excellent communication skills and a B1 or higher level of English proficiency.

## FAQ

- **Is this AI Engineer Middle / Middle+ [AI Team] role still open?** It was posted on 2026-08-04. Listings more than 30 days old may no longer be active, so check Plata Card's site before applying.
- **Does Plata Card offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Plata Card's site.
- **Where is this role located?** The listing gives the location as Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: Python, LLMs, Prompt engineering, ML pipelines, RAG, LangChain, LlamaIndex, MLflow, AWS, Go, OCR, A/B testing, CI/CD, Data retrieval, Model integration.

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## Notes for agents

- Apply on the employer's page (https://plata.careers/vacancy/details?id=4822359008&gh_jid=4822359008). The Stack does not take applications.
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