Senior Full Stack Engineer - Nodejs & React - Enterprise Solutions Inc. (Saint-Esprit, Quebec)

Senior Software Engineer – Full Stack (Cybersecurity SaaS)We are seeking experienced Senior Full‑Stack Software Engineers to join our growing engineering team and help build secure, scalable, and customer‑centric SaaS products serving both B2B and B2C markets. This role offers the chance to work on innovative cybersecurity solutions that protect millions of consumers and small businesses.
The ideal candidate will have strong expertise across modern frontend and backend technologies, including React, TypeScript, NestJS, and Node.js, along with a passion for building high‑quality software, solving complex technical challenges, and contributing to product innovation through emerging technologies such as Generative AI, LLMs, MCP, and RAG architectures.
Key ResponsibilitiesFeature Development & DeliveryDesign, develop, and deliver new features for cybersecurity SaaS platforms
Collaborate closely with Product Managers, UX Designers, and Engineering teams to define technical requirements and implementation plans
Estimate development effort and proactively identify risks, blockers, and dependencies
Contribute to continuous improvement of engineering practices, processes, and team culture
Research, prototype, and evaluate Generative AI and Large Language Model (LLM) capabilities to drive product innovation
Full‑Stack DevelopmentDevelop clean, maintainable, scalable, and well‑tested software solutions
Build responsive and reusable frontend applications using React and TypeScript
Develop RESTful APIs and backend services using NestJS and Node.js
Implement software security best practices across application layers
Participate in code reviews and contribute to engineering standards and best practices
Develop reusable components, libraries, and shared services
Integrate third‑party APIs and intelligent services into product solutions
Utilize modern development tools and AI‑assisted engineering platforms to improve productivity and code quality
Solution Design & ArchitectureDesign scalable API architectures, schemas, and technical documentation
Develop reusable frontend component architectures and design systems
Make sound architectural decisions focused on scalability, maintainability, security, and customer experience
Design microservices‑based solutions and distributed systems
Evaluate and optimize system performance, reliability, and scalability
Design and implement AI‑enhanced solutions leveraging:Model Context Protocol (MCP)
Retrieval‑Augmented Generation (RAG)
Vector databases such as Pinecone and WeaviateTesting & Quality AssuranceDevelop and maintain comprehensive unit and integration tests
Ensure software quality through automated testing and peer reviews
Follow test‑driven and quality‑focused development practices
Maintenance & Production SupportTroubleshoot, debug, and resolve software defects and performance issues
Address application security vulnerabilities and operational incidents
Support production environments and participate in on‑call rotations when required
Continuously enhance existing products and services
Required QualificationsBachelor's degree in Computer Science, Software Engineering, or equivalent practical experience.
5+ years of professional software development experience.
Strong proficiency in:JavaScript
TypeScript
HTML
CSSHands‑on experience building modern web applications using React.
Strong experience developing RESTful APIs using NestJS and Node.js.
Experience designing and implementing microservices architectures.
Understanding of application security, cloud security, and networking fundamentals.
Strong knowledge of software engineering principles, data structures, algorithms, and system design.
Experience with Git and modern version control practices.
Understanding of Agile development methodologies and DevOps practices.
Excellent analytical, troubleshooting, and problem‑solving skills.
Strong verbal and written communication skills.
Professional English proficiency with the ability to collaborate effectively with US‑based stakeholders via Slack, Azure DevOps, and video conferencing.
Preferred QualificationsExperience with unit testing frameworks such as Jest, Mocha, or similar testing framework.
Experience with SaaS platform architecture and multi‑tenant systems.
Exposure to cloud platforms including AWS, Microsoft Azure, Google Cloud Platform (GCP).
Understanding of cloud‑native application development and deployment.
Experience with developer productivity tools and AI‑assisted coding platforms.
Experience designing and implementing AI‑powered applications.
Knowledge of Model Context Protocol (MCP), Retrieval‑Augmented Generation (RAG), vector databases (Pinecone, Weaviate, etc.), LLM integrations and AI orchestration framework.
Desired SkillsFull‑Stack Development
React.js
TypeScript
NestJS
Node.js
REST API
Microservices Architecture
Cloud Security
SaaS Platform
AI/LLM Integration
MCP & RAG
AWS / Azure / GCP
Agile & DevOps
Unit Testing
System Design
Cybersecurity Application#J-18808-Ljbffr