Job
- Level
- Senior
- Job Field
- Data, Back End
- Employment Type
- Full Time
- Contract Type
- Permanent employment
- Location
- Kassel, Berlin, Cologne
- Working Model
- Full Remote, Hybrid, Onsite
Job Summary
In this role, you develop scalable AI applications using TypeScript and Node.js, integrate LLMs into business applications, and optimize RAG workflows while collaborating closely with interdisciplinary teams.
Job Technologies
Your role in the team
- As a Senior AI Backend Developer, you develop scalable and production-ready AI applications based on modern TypeScript and Node.js architectures.
- Your focus is on implementing Agentic AI and RAG workflows as well as integrating Large Language Models (LLMs) into real-world business applications.
- You work closely with interdisciplinary teams and actively contribute to the development of our AI platform.
- The position can be exercised at one of our locations in Cologne, Kassel, or Berlin - alternatively, remote work within Germany is also possible.
- Development and further development of AI applications and backend services with TypeScript and Node.js.
- Implementation of Retrieval-Augmented Generation (RAG) and Agentic-AI workflows.
- Integration, preprocessing, and structuring of various data sources (parsing, chunking, normalization, embeddings, context management).
- Integration of external systems via APIs, Function Calling, and MCP or comparable patterns.
- Building robust, scalable microservices for productive LLM-based applications.
- Participation in the further development of a company-wide AI platform.
- Use and integration of Google Cloud Platform (GCP), especially Vertex AI.
- Automation of deployments and infrastructure as well as integration into CI/CD pipelines.
- Conducting code reviews, technical documentation, and further development of development standards.
- Ensuring high code quality, maintainability, and scalability.
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Our expectations of you
Qualifications
- Excellent knowledge of TypeScript and Node.js.
- Proficient in API design and integration of external systems.
- Knowledge of MCP or comparable integration patterns.
- Very good knowledge of German as well as work authorization within the EU.
- Hands-on experience with Terraform and Infrastructure as Code.
- Knowledge of Redis, PostgreSQL, or MySQL.
- Knowledge of Clean Code, SOLID, DRY, and common Design Patterns.
Experience
- Several years of experience as a Backend Developer, AI Engineer, or LLM Engineer.
- Practical experience with Generative AI and LLM-based applications.
- Experience with RAG systems and/or agent-based workflows.
- Experience with Vertex AI and production-ready AI services.
- Experience with additional GCP services (e.g., Cloud Run, Pub/Sub, Cloud Tasks, IAM, Artifact Registry).
- Experience with GitLab CI, Cloud Build, or comparable CI/CD tools.
- Experience with Docker or DDEV.
- Experience in building or operating AI platforms.
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What we offer
- Flexible working hours and the possibility of working from home.
- Modern cloud and AI technologies.
- High degree of creative freedom and technical responsibility.
- Individual training and development opportunities.
- Attractive compensation package.
- Collaborative and innovation-driven corporate culture.
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Benefits
Health, Fitness & Fun
Work-Life-Integration
Topics that you deal with on the job
Job Locations
This is your employer
OPEN Digitalgruppe GmbH
OPEN Digitalgruppe GmbH is an established digital agency based in Cologne with additional offices in Berlin and Kassel. It focuses on e-commerce, CRM, and software development to provide innovative digital solutions.
Description
- Company Type
- Established Company
- Working Model
- Full Remote, Hybrid, Onsite
- Industry
- Internet, IT, Telecommunication
Senior Developer AI Systems
- Location
- Kassel, Berlin, Cologne
- Working Model
- Full Remote, Hybrid, Onsite
- Diversity
- Open for all genders
