Software Engineer, AI Engineer, Full Stack Developer

Company description

At Publicis Collective, we know tomorrow’s challenges won’t be solved by today’s solutions. It’s why we support our teams with the resources and tools they need to continue redefining the future of marketing. It’s also why clients rely on us to lead the way in connecting media, data, technology, and teams by what matters most – business outcomes.

Publicis Collective’s consultative practitioners are catalysts for business growth and innovation, we’re more than media experts. We are an incubator for high‑performing talent and a launchpad for ideas that push the boundaries of what’s possible.

As part of the global Publicis Media network, we’re backed by the power, scale, and benefits of Publicis Groupe, one of the largest and most celebrated marketing and communications platforms on the planet.

How are we different? There are three core values at the center of our approach that help us stay ahead – curious, open, and driven.

Curious – A deep curiosity compels us to go beyond the brief to deliver exceptional outcomes.

Open – We value diverse perspectives and new ways of working.

Driven – We are ambitious, rigorous, self‑disciplined, and resilient in our pursuit of excellence.

If you're a collaborative and enterprising practitioner with a passion for media and a desire to make a real impact, we want to hear from you.

Let's shape the future together.

We are looking for a highly skilled Full Stack Developer (Software Engineer) who is comfortable with both front and back end programming. Full Stack Developers are responsible for developing and designing full stack web architecture, ensuring the responsiveness of applications, and working alongside AI Engineers, Dev Ops Engineers, and Data Scientists, among other duties. Full Stack Developers will be required to see out a project from conception to final product, requiring good organizational skills and attention to detail.

• Develop front end website architecture with AI‑first design principles.
• Design user interactions on web pages that seamlessly incorporate AI capabilities.
• Develop back end applications functions with LLM integration.
• Create servers and databases for functionality, including vector databases for AI applications.
• Build and integrate AI‑native features using LLM APIs (OpenAI, Anthropic, Google AI, etc.).
• Design and implement prompt engineering strategies for optimal AI performance.
• Ensure cross‑platform optimization for mobile phones.
• Ensure responsiveness of applications.
• Responsible for, and managing, a project from conception to finished product (i.e.: final product)
• Design and develop APIs, including AI service endpoints.
• Meet both technical and consumer needs.
• Keep abreast of developments in web applications, programming languages, and AI/LLM technologies.

• At least 2 years' experience working as a Fullstack Engineer, AI Engineer or in a similar role.
• Complete familiarity with Large Language Models (LLMs), including GPT‑4, Claude, Gemini, and open‑source alternatives.
• Proven experience building AI‑native applications from the ground up.
• Expert knowledge of LLM APIs and integration patterns (OpenAI API, Anthropic API, Hugging Face, etc.).
• Experience with prompt engineering, fine‑tuning, and RAG (Retrieval‑Augmented Generation) implementations.
• Familiarity with AI development frameworks such as Lang Chain, Llama Index, and similar tools.
• Proficient with fundamental front‑end languages such as HTML, CSS and JavaScript.
• Proficient with server‑side languages such as Python and Typescript.
• Proficient with database technology such as Pinecone, S3, EFS, and vector databases for AI applications.
• Proficient with JavaScript/Type Script frameworks such as React, Vite, Next.js.
• Knowledge of and experience with GIT and popular code repository management tools.
• Knowledge of and experience with visualization tools like Docker.
• Experience with AI model deployment and scaling.
• Understanding of AI safety, ethics, and responsible AI development practices.
• Excellent communication skills.
• Good problem‑solving skills.
• Strong organizational and project management skills.

Our Publicis Groupe motto…