Senior Full Stack Application DeveloperWellnessLiving • Hybrid Thornhill, Canada
Senior Full Stack Application Developer
WellnessLiving • Hybrid Thornhill, Canada
3 days ago
Job type
- Full-time
- Remote
Job descriptionImplement microservices aligned to business domains and bounded contexts Contribute to domain-driven design (DDD) discussions and translate domain models into working services Design and implement event-driven workflows using messaging or streaming platforms (e.g., Kafka, Kinesis, SNS / SQS) Apply patterns such as idempotency , event versioning , and eventual consistency Implement and integrate modern authentication and authorization solutions using OAuth2, OpenID Connect (OIDC), and JWT Work hands-on with identity platforms such as Auth0 and / or FusionAuth Design role-based and permission-based access controls suitable for multi-tenant SaaS environments Build and deploy services using Docker, Kubernetes , and AWS Own services throughout their lifecycle : CI / CD, deployment, monitoring, and production support Use infrastructure-as-code and automated pipelines (e.g., GitHub Actions, Terraform / CloudFormation) Implement logging, monitoring, and alerting using tools such as Datadog, ELK, or Splunk Write clean, testable, and maintainable code with appropriate unit, integration, and contract testing Participate in code reviews, architecture reviews, and technical decision-making Collaborate cross-functionally with Product, UX, QA, and Platform teams in an Agile environment Mentor junior engineers and help raise overall engineering standards Leverage AI-assisted development tools (e.g., Copilot, ChatGPT, internal AI tools) to improve productivity, code quality, and learning Apply engineering judgment to validate, refactor, and test AI-assisted outputs Use AI responsibly for tasks such as scaffolding, refactoring, test generation, and documentation, and not as a substitute for engineering fundamentals Bachelor’s degree in computer science, Engineering, or equivalent practical experience 5+ years of hands-on full-stack development experience in production environments Strong experience with React , including Hooks, Context, and component-driven architecture Proficiency in JavaScript / TypeScript , HTML5, CSS3 / SASS, and modern frontend tooling Hands-on experience building API-first microservices using Java (Spring Boot) , Node.js , and / or Python (FastAPI) , with a strong emphasis on contract-first design (OpenAPI), backward compatibility, and service evolution Practical experience with microservices architectures , including service decomposition and inter-service communication Strong understanding of REST, OAuth2, OIDC, JWT , and API gateway patterns Experience with Docker and Kubernetes in real production systems Experience with cloud platforms (AWS preferred) and CI / CD pipelines Working knowledge of relational and NoSQL data stores (e.g., MySQL, Redis, MongoDB, DynamoDB ) Experience with monitoring, logging, and observability in distributed systems Comfortable working in Agile teams (Scrum / Kanban) Experience with Event Streaming / Messaging platforms (Kafka, Kinesis, SNS / SQS) Exposure to Micro Frontend architectures (Module Federation, single-spa) Experience with multi-tenant and white-label SaaS platforms Familiarity with PHP-based legacy systems and modernization efforts Knowledge of accessibility (WCAG) and internationalization Experience in healthcare, fitness, or regulated SaaS environments
Responsibilities
Full-Stack Application Development
- Design, develop, and maintain production-grade full-stack applications using React , Node.js , and Java / Spring Boot
- Build modular, reusable frontend components aligned with design systems , accessibility standards, and responsive UX best practices
- Develop secure, scalable RESTful and event-driven APIs , ensuring performance, reliability, and backward compatibility
Microservices, DDD & Event-Driven Systems
AI-Augmented Development
Required Qualifications & Experience
Nice to Have
Please note that only those selected for an interview will be contacted.
We appreciate you taking the time and look forward to reviewing your application!
WellnessLiving is proud to be an equal opportunity employer. We base employment decisions solely on qualifications, experience, and business needs. We do not tolerate discrimination or harassment of any kind. All qualified applicants will receive consideration without regard to race, color, religion, creed, gender, gender identity or expression, sexual orientation, national origin, disability, age, genetic information, veteran status, marital or family status, or any other status protected by applicable laws.
We utilize AI to generate summaries of interview notes as part of our candidate evaluation process. This helps ensure a fair and consistent review while maintaining a human-centered hiring approach.
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Senior Application Developer • Hybrid Thornhill, Canada
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