Fullstack Gen AI Developer

Our requirements

• Passion for Generative AI and fullstack development, with hands-on experience delivering AI-powered web applications.
• 2+ years of experience in software development, covering both frontend and backend environments.
• Strong programming skills in Python and JavaScript/TypeScript, with experience in frameworks like FastAPI, Flask, Node.js, React, Next.js.
• Working knowledge of LLMs, prompt engineering, fine-tuning, and retrieval-augmented generation (RAG).
• Experience connecting to GenAI APIs and managing vector databases (FAISS, Pinecone, Weaviate, etc.).
• Familiarity with cloud platforms (AWS, Azure, GCP) and CI/CD pipelines for deploying AI-driven applications.
• Understanding of data pipelines, embeddings, and model-serving infrastructure.
• Strong communication skills in English (German or Polish are a plus), and the ability to collaborate in cross-functional, international teams.

Optional

• Experience with LangChain / LangGraph, OpenAI Function Calling, or custom agent frameworks.
• Familiarity with Vercel AI SDK, Next.js Server Actions, or other GenAI-focused web stacks.
• Background in UX for AI applications, multimodal systems, or real-time AI interfaces (e.g., chat, co-creation tools).
• Experience building end-to-end prototypes or AI SaaS products from concept to production.

Your responsibilities

• Design, build, and deploy fullstack Generative AI applications, integrating advanced LLMs, image, and multimodal models into scalable products.
• Develop and maintain both frontend interfaces (React, Next.js, etc.) and backend systems (Python, Node.js, or similar) that power GenAI features.
• Implement AI-driven workflows — including prompt orchestration, RAG pipelines, and real-time model interactions.
• Integrate foundation models and APIs (OpenAI, Anthropic, Hugging Face, Stability, etc.) into robust backend services and interactive user experiences.
• Collaborate closely with data scientists and product teams to translate business requirements into AI-enabled digital experiences.
• Ensure system scalability, performance, and security, leveraging cloud infrastructure and MLOps best practices.
• Stay at the forefront of GenAI innovations, experimenting with new models, frameworks, and architectures.

About the project

What we offer

• Practical benefits: yearly financial bonus, private medical care with Medicover with additional packages (e.g., dental, senior care, oncology) available on preferential terms, life insurance and access to NAIS benefit platform.
• Award-winning development programs to support your career at every stage. Connected Manager - our leadership development program has already helped over 300 employees accelerate their growth!
• Access to over 70 training tracks with certification opportunities (e.g., GenAI, Excel, Business Analysis, Project Management) on our NEXT platform. Dive into a world of knowledge with free access to Education First languages platform, Pluralsight, TED Talks, Coursera and Udemy Business materials and trainings.
• Cutting-Edge Technology: Position yourself at the forefront of IT innovation, working with the latest technologies and platforms. Capgemini partners with top global enterprises, including 145 Fortune 500 companies.
• Enjoy hybrid working model that fits your life - after completing onboarding, connect work from a modern office with ergonomic work from home, thanks to home office package (including laptop, monitor, and chair). Ask your recruiter about the details.

Benefits

• sharing the costs of sports activities
• private medical care
• life insurance
• no dress code
• parking space for employees
• extra social benefits
• redeployment package
• employee referral program
• charity initiatives
• access to courses e.g. Excel, VBA, RPA, Customer Care
• unlimited access to Udemy Business
• free chat/call with a therapist

Recruitment stages

• 1.
  Interview with the recruiter
• 2.
  Competency Tests/Language Verification
• 3.
  Video call with a manager
• 4.
  Final Decision

Capgemini Invent