Montreal HQ

-English version to follow-

(Stay22 est un employeur garantissant l’égalité des chances. Toutes les candidatures qualifiées seront examinées. Si vous avez un handicap ou des besoins particuliers nécessitant des aménagements, contactez-nous à [email protected].)

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About Stay22

Based in Montreal, Stay22 helps ambitious creators and intent-rich digital platforms turn their existing traffic into incremental revenue, with technology that works quietly in the background.

Today, more than 6,500 creators and platforms rely on Stay22, with over $1 billion in annual transactions flowing through the platform. Originals built for travel, the company now supports partners across retail, lifestyle, publishing, events, and transport as it expands its monetization infrastructure for the modern creator economy.

Position overview

As a Senior Fullstack Developer on Stay22's Neuro team, you will design and build robust backend systems that power our AI/ML infrastructure. Neuro's mission is to design, develop, and maintain the Roam engine - our machine-learning redirect system - along with underlying services like ML pipelines, model hosting, and LLM gateways. In this role you'll focus on the infrastructure side of AI/ML (model training is handled by our ML engineers), ensuring that data flows smoothly through ML pipelines and that inference services run reliably. You'll support Stay22's AI Roam product by building scalable backend APIs and services for real-time inference and analytics. You will also build APIs and tools that enable rapid AI experimentation across the company.

Key responsibilities

Architect, implement, and maintain end-to-end machine learning pipelines and services - from data preparation and model deployment to real‑time inference engines - to support Stay22's AI products

Own the backend and API development for the Roam (ML-based redirection) engine, ensuring these services are scalable, performant, and reliable

Create and maintain internal Large Language Model (LLM)



client/gateway layers that allow product teams to leverage language models for features like content suggestions or classification

Partner with the ML engineering team to integrate trained models into production services and work with the Data team to consume and optimize data pipelines feeding ML models

Coordinate with the Forge/platform team to implement and maintain cloud infrastructure (GCP), CI/CD pipelines, monitoring/logging, and security best practices for all AI-related systems

Build internal developer‑facing services and tools that accelerate AI experimentation and adoption, effectively acting as an internal AI/ML “platform” to help other teams integrate Neuro's services

Ensure backend systems are well‑documented, maintainable, and performant at scale. Identify and address performance bottlenecks, implement caching or optimizations as needed, and uphold high standards for code quality and testing.

Requirements

English proficiency is required for daily communication with international colleagues and direct reports.

Bachelor's or Master's degree in Computer Science or related field, with 8+ years of software development experience focusing on backend systems

Solid proficiency in Python and modern backend frameworks (e.g. FastAPI), with a track record of designing and building scalable APIs and microservices. (Experience with TypeScript/Node.js is not required for this role but welcomed)

Experience deploying services on cloud platforms (preferably Google Cloud Platform) and using container technologies (Docker, Kubernetes, etc.). Familiarity with GCP services like Vertex AI is a plus

Proficiency with relational and NoSQL databases (e.g. PostgreSQL, MongoDB) and asynchronous task queues (e.g. Celery). Hands‑on experience optimizing database schemas and query performance





Understanding of machine learning workflows and the unique challenges of serving ML models (data pipelines, inference latency, etc.). Experience with ML infrastructure (Vertex AI, TensorFlow Serving, or similar) is advantageous

Skilled in setting up CI/CD pipelines, automated testing, and monitoring/alerting (logs, metrics, tracing) to ensure system reliability and security

Excellent communication and teamwork skills. You should be able to work closely with ML engineers, data engineers, and platform teams to align on interfaces and standards

Self‑driven problem‑solver who can work independently in a hybrid environment

What to Expect from our Hiring Process

We know your time’s valuable, so here’s the quick rundown of what to expect.

Screening call with our Talent Acquisition Partner (20-30 min)

Hiring Manager virtual call (30min)

Technical Interview with a Developer (60min)

Panel Interview in person with some team members (45min)

Final interview with our CEO (30 minutes)

Please note that this process is subject to change at any point, based on additional requirements from the team.

Why join Stay22?

Support Travel Creators: Be part of a team that empowers travel creators to explore the world by increasing their passive income potential.

Empower Your Growth: We hire champions and give them the opportunity to excel, skipping levels and honing their superpowers.

Lead with Impact: We empower our team members to take charge and make a real impact in the Stay22 universe.

Location, Location, Location: Enjoy our bright and vibrant office in the heart of Little Italy, surrounded by great shops and restaurants

Be Yourself: Embrace a come‑as‑you‑are dress code and a flexible work schedule.

Comprehensive Benefits: We offer health & dental benefits, retirement plans, learning & development opportunities, and social & team‑building activities, including exciting retreats.

(Stay22 is an equal‑opportunity employer. All qualified applicants are given consideration. If you have a disability or particular need that requires accommodation, please contact us at careers at stay22.com)

📌 Senior Fullstack Developer - Neuro/ML Squad (Montreal)
🏢 Stay22
📍 Montreal