English section of this bilingual listing.
Working at Cossette means connecting to an incomparable creative energy. It means collaborating with clients who are excited about stimulating projects that highlight our strengths and resonate globally. It means being surrounded by intelligent and enlightened people who have the sacred fire very much alive. It means boosting your growth, and feeling truly trusted. In short, working at Cossette means feeling like you're moving to the next level.
The role includes:
- Designing and deploying end-to-end agentic workflows and RAG systems (LLMs, vector databases, orchestrators, APIs), with a requirement for robustness and production quality.
- Mapping and defining clear solution architectures, from client brief to deployment, by rigorously documenting technical choices (spec-driven development).
- Selecting, integrating, and optimizing LLMs (OpenAI, Anthropic, VertexAI, etc.) and orchestration frameworks (LangChain/LangGraph, Vercel AI SDK, CrewAI, etc.), while staying abreast of the latest advances in generative AI.
- Mastering data in all its forms: structured, unstructured, vectorised. Designing vectorisation and retrieval strategies tailored to the real needs of the delivered products.
- Optimizing prompts to maximize relevance and quality of responses.
- Connecting AI agents to vector databases, external APIs, and other digital assets, with mastery of best practices for API testing and documentation (Postman, RESTful).
- Implementing traceability and observability tools (LangSmith, LangFuse, etc.).
- Actively collaborating with front-end and back-end teams, not as an internal consultant, but as a full co-builder.
What You Bring
- Real autonomy: you identify obstacles, propose solutions, and move forward without waiting for the path to be cleared for you.
- An end-to-end product vision: you care as much about the user experience as what is running under the hood.
- A constant concern for delivering finished, quality products, designed for real users, not prototypes or demos.
- A collaborative and intrapreneurial spirit: you get involved, you raise the right questions, you move things forward.
- Ease with data in all its forms: you know how to understand it, structure it, transform it, and use it as leverage for the products you build.
- Active monitoring of the generative AI ecosystem, LLMs, orchestration frameworks, and emerging best practices.
- A good command of the open-source ecosystem and the reflex to choose the right tools for the right contexts.
- Practical experience with the design of agentic workflows and the integration of LLM models (OpenAI, Anthropic, VertexAI, etc.).
- Ability to map a solution architecture and document it clearly (spec-driven development).
- Solid Python skills in an ML/AI context, and good command of JavaScript / TypeScript for web integration and deployment.
- Experience with CI/CD pipelines and containerized environments (Docker).
- Mastery of RESTful APIs, API testing best practices (Postman), and Git.
- Understanding of agent skills and their design in multi-agent architectures, particularly with Claude (Anthropic).
- Experience with cloud and vector database tools: Supabase, BigQuery, and equivalents.
- Familiarity with front-end frameworks (React, Vue, Svelte).
Nice to haves:
- Knowledge of creative technologies in generative AI, particularly for video, image, audio generation, and visual workflow interfaces: Veo, Kling, SeedDance, Nano Banana, GPT Image, Weavy, ComfyUI, Adobe Firefly, Runway, Ideogram, Eleven Labs.
Experience
- Minimum 2 years of experience in GenAI and 3 to 7 years in web/application development.
What's in it for you?
We value your personality
- An innovative and entrepreneurial work environment that encourages ingenuity and individuality - with the best colleagues and best clients.
- Hybrid work models and flexible hours, as well as a work-from-anywhere policy for short-term stays in other regions.
- Generous vacation starting at 3 weeks + 1 extra week during the holiday season.
- Modern and open workspaces, with coffee and snacks, located in the heart of the city, close to shops and restaurants, and with easy access to public transport.
- Social events for the team - holiday parties, seasonal gatherings, weekly happy hours, inspiring conferences, and much more!
We are dedicated to learning and human improvement
- Internal learning and development sessions and annual conversations about career and growth.
- Access to an internal network of professional opportunities across all agencies in the Plus Company network.
- EDI committees and Employee Resource Groups, programs, and initiatives throughout Plus Company.
Discover our EDI report here to learn more about our work and our commitment to equity.
We invest in your health and well-being
- Flexible benefits to meet your lifestyle and life stages - with access to a personal account that you can use for a wide variety of expenses, including fitness center membership, pet care, study fees, and many others.
- Comprehensive mental health support, including access to a virtual clinic that offers guided and personalized cognitive behavioral therapy programs as well as live therapy sessions, access to health clinicians 24/7, and a holistic range of health and well-being resources for you and your family.
- Health and well-being rooms when you need a place to recharge.
- A responsible sick and personal leave policy designed so that you don't have to worry when an obligation or emergency arises.
- Complementary maternity leave plan.
What You Should Know
We are very grateful for the number of talented people who apply every day to work with us. And we thank each of you. We will contact directly those we wish to meet for an interview.
To give meaning to work, different points of view must be taken into account. We are an equal opportunity employer and we do not discriminate based on age, color, abilities, national origin, race, religion, sex, or sexual orientation. Not only are these provisions protected by provincial and federal laws, but accepting difference is what makes Cossette what it is, and we wouldn't want it any other way. We are proud of our inclusive and accessible workplace. If you require accommodations during the interview process, please let us know.
By joining Cossette, you become part of Plus Company. This network of entrepreneurial agencies is built on collaboration, not competition. It allows each agency - and each individual - to pool their unique capabilities to create magic. You will have the opportunity to take risks, dream big, develop your skills, and evolve in your career with the total support of the network and everything it has to offer.
