Senior Software Engineer, Backend - Neuro Squad

Job Description

Job Title: Senior Software Engineer, Backend - Neuro Squad

Location: Montreal - Hybrid (1-2 days at the office per week)



About Stay22

At Stay22, we’re revolutionizing how people convert online. Our AI-powered affiliate platform helps publishers, ticketing platforms, and content creators unlock new revenue streams while levelling up their audience's user experience. At Stay22, our partners don’t just earn more, they deliver more. Join us and be part of something big that's shaking up the affiliate world.

Position overview

As a Senior Backend 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 and Spark engines - our machine-learning redirect and affiliate link systems - 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 products Roam and Spark 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) and Spark (AI-driven affiliate linking) engines, 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

• Bachelor's or Master's degree in Computer Science or related field, with 8+ years of software development experience focusing on backend systems
• Strong 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 (30-45 minutes)
• Whiteboarding session oriented on System Design (Miro) with the Engineering Team (60 minutes)
• Final interview with our CEO (30 minutes)
• Offer & onboarding
  
  

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 Montreal’s Plateau Mont-Royal, surrounded by the best shops and restaurants.
• BYOD - Bring your own dog: our office is pup-friendly. Whether it's a quick belly rub or a midday walk, your furry sidekick is welcome here.
• 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)