Job Title

Senior Full Stack Application Developer Company: WellnessLiving Salary: $110,000 - $130,000 + Benefits + Vacation (exact placement within this range will depend on skills and qualifications) Location: Thornhill, Ontario (hybrid) Employment Type: Full-time, permanent About Us At WellnessLiving, we empower thousands of health and wellness business owners to turn their entrepreneurial dreams into reality. Our missioncritical software fuels their vision, supporting millions of clients around the world in their wellness journeys. With a deep commitment to putting our customers first, we foster a culture that values high performance, adaptability, and accountability. If you are a skilled professional who thrives in a fastpaced, customerfocused environment and are passionate about making a meaningful impact on the health and wellness industry, we would love to connect with you. Our Core Values Customer First We approach every challenge with a customerfocused lens, driven by an obsession with our customers happiness and success. Excellence We approach every task, whether big or small, with a steadfast commitment to exceptional execution and the pursuit of greatness. Accountability We take full ownership of our decisions, actions, and outcomes both successes and failures. Adaptability We recognize that sustained success demands that we be malleable and purposefully evolve, acknowledging that the world is dynamic and constantly changing. About The Role We are seeking a Senior FullStack Application Developer to play a key, handson role in our microservices and domaindriven modernization journey. This role is ideal for an experienced engineer who combines strong frontend craftsmanship with backend and distributed systems thinking and has implemented modern cloudnative architectures. You will design, build, and evolve scalable, eventdriven, multitenant SaaS applications used across multiple brands in the healthcare and fitness technology space. You will work endtoend, from Reactbased user experiences to secure APIs and microservices built with Node.js and Java (Spring Boot) while collaborating closely with product, architecture, DevOps, and data teams. This role requires direct implementation experience, an ownership mindset, and the ability to work effectively in an environment where systems are actively transitioning from monolithic patterns to domainaligned microservices. Key Responsibilities FullStack Application Development: Design, develop, and maintain productiongrade fullstack 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 eventdriven APIs ensuring performance, reliability, and backward compatibility. Microservices, DDD & EventDriven Systems: Implement microservices aligned to business domains and bounded contexts; contribute to domaindriven design (DDD) discussions and translate domain models into working services; design and implement eventdriven 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 handson with identity platforms such as Auth0 and or FusionAuth; design rolebased and permissionbased access controls suitable for multitenant SaaS environments; build and deploy services using Docker, Kubernetes, and AWS; own services throughout their lifecycle: CI/CD, deployment, monitoring, and production support; use infrastructureascode 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 decisionmaking; collaborate crossfunctionally with Product, UX, QA, and Platform teams in an Agile environment; mentor junior engineers and help raise overall engineering standards. AIAugmented Development: Leverage AIassisted development tools (e.g., Copilot, ChatGPT, internal AI tools) to improve productivity, code quality, and learning; apply engineering judgment to validate, refactor, and test AIassisted outputs; use AI responsibly for tasks such as scaffolding, refactoring, test generation, and documentation, and not as a substitute for engineering fundamentals. Required Qualifications & Experience Bachelors degree in computer science, Engineering, or equivalent practical experience. 5+ years of handson fullstack development experience in production environments. Strong experience with React, including Hooks, Context, and componentdriven architecture. Proficiency in JavaScript/TypeScript, HTML5, CSS3/SASS, and modern frontend tooling. Handson experience building APIfirst microservices using Java (Spring Boot), Node.js, and/or Python (FastAPI), with a strong emphasis on contractfirst design (OpenAPI), backward compatibility, and service evolution. Practical experience with microservices architectures, including service decomposition and interservice 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). Nice to Have Experience with Event Streaming / Messaging platforms (Kafka, Kinesis, SNS/SQS). Exposure to Micro Frontend architectures (Module Federation, singlespa). Experience with multitenant and whitelabel SaaS platforms. Familiarity with PHPbased legacy systems and modernization efforts. Knowledge of accessibility (WCAG) and internationalization. Experience in healthcare, fitness, or regulated SaaS environments. Only those selected for an interview will be contacted. We appreciate you taking the time and look forward to reviewing your application! Referrals increase your chances of interviewing at WellnessLiving by 2x. WellnessLiving is proud to be an equalopportunity 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 humancentered hiring approach. #J-18808-Ljbffr