Fullstack Gen AI Developer

At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting‑edge solutions.

Your Tasks

• Design, build, and deploy full‑stack 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.

Your Profile

• Passion for Generative AI and full‑stack 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.

Nice to have

• 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.
• Experience building end‑to‑end prototypes or AI SaaS products from concept to production.

What You’ll Love About Working Here

• Practical benefits: yearly financial bonus, private medical care (Medicover), and additional packages such as dental, senior care, oncology, life insurance and access to the NAIS benefit platform.
• Award‑winning development programs to support your career at every stage. The Connected Manager leadership development program has already helped over 300 employees accelerate their growth.
• Access to over 70 training tracks with certification opportunities (GenAI, Excel, Business Analysis, Project Management) on the NEXT platform, plus free access to Education First, Pluralsight, TED Talks, Coursera and Udemy Business.
• Working with cutting‑edge technology and partners with top global enterprises, including 145 Fortune 500 companies.
• Hybrid working model. After onboarding you can work from a modern office or home. Home office package includes laptop, monitor and chair.

Capgemini is committed to diversity and inclusion, ensuring fairness in all employment practices. We evaluate individuals based on qualifications and performance, not personal characteristics, striving to create a workplace where everyone can succeed and feel valued.

Apply now!

Location: Warsaw, Mazowieckie, Poland

Salary: PLN 211,733.00 – PLN 444,162.00 per year

Seniority level: Mid‑Senior level

Employment type: Full‑time

Job function: Engineering and Information Technology

Industries: IT Services and IT Consulting