AI Engineer (m/f/d)

think-cell Software

Berlin

On-site

EUR 60,000 - 80,000

Full time

14 days+

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Job summary

A leading software development company in Berlin is seeking an AI Engineer to build sophisticated systems that enhance product automation. The ideal candidate has over 3 years of experience, strong Python skills, and a background in AI frameworks. This full-time role offers opportunities for creativity and impact within a collaborative environment.

Qualifications

3+ years of experience in a similar role.
Ability to design modular, multi-step agent workflows.
Experience with fine-tuning and deployment of custom models.

Responsibilities

Build sophisticated AI systems and great code.
Create innovative prototypes for the product.
Automate tasks and write Python code.

Skills

Strong Python skills

Experience with large language models

Prototyping and backend frameworks

Prompt design and tool integration

Iterative improvement based on feedback

Basic Docker knowledge

Tools

FastAPI

LangChain

Hugging Face

FAISS

Job description

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think-cell provides graphics software that performs most of the painstaking work of creating data-driven slides for professional Excel and PowerPoint users. The testing department makes sure that new features are usable for all user groups, from new users to seasoned financial professionals.

What you will do

As an AI Engineer, you will get to apply your passion for AI to build sophisticated systems and great code that makes the think-cell product stronger and more automated.

You'll have the creative freedom to go beyond writing product code, focusing on building innovative prototypes that push the boundaries of what our software can do. You will contribute as a generalist with a strong understanding of the main AI frameworks, helping to push these boundaries. You will build prototypes to automate tasks, apply prompt engineering and other AI techniques, and write Python code while working independently to solve complex challenges.

Your work will directly impact our core mission of automating complex tasks in the slide writing context, which in turn makes business presentations easier and more enjoyable for over 1.3 million users worldwide.

You will be great for this position if you have

3+ years of experience in a similar role.
Strong Python skills for writing clean, testable, and production-grade code, with experience in prototyping and backend frameworks (e.g., FastAPI).
Solid understanding of large language models, transformer architectures, and practical use of frameworks like LangChain, LangGraph, or similar.
Ability to design and assess modular, multi-step agent workflows with clear metrics, including agent routing, memory, and tool orchestration.
Skilled in prompt design, function calling, tool integration, and familiarity with RAG pipelines and vector stores (e.g., FAISS).
Experience with fine-tuning (LoRA, QLoRA, Hugging Face), and data preparation, training, evaluation, and deployment of custom models.
Proficiency in iterative improvement based on user feedback and testing, along with basic Docker, CI/CD, and code quality practices.

Our Values

As part of our team, you will embody and help shape the following principles that define us:

Forward Thinking: We embrace change and challenge the status quo.
Ownership: We take pride in our work and learn from our mistakes.
Unified Team: We foster collaboration, respect, and integrity.
Strive for Excellence: We set ambitious goals and pursue quality.

Why is think-cell the right place for you?

We empower over 1.3 million users across 30,000 companies, including top consulting firms and major global enterprises. With offices in Berlin, Denver, Boston, London, Tokyo, and Dubai, we’re a diverse team of over 150 people, committed to innovation and excellence.

Think-cell is more than a job – it's a chance to be part of an innovative, inclusive team that values collaboration and growth. We encourage applicants from all backgrounds to apply. Together, we can shape the future of productivity software. We can’t wait to see what you’ll bring to the team!

Seniority level