[Remote] Senior Full Stack Engineer – LIMS & Healthcare Systems

Note: The job is a remote job and is open to candidates in USA. Qualis1 Inc. is a company focused on healthcare solutions, and they are seeking a Senior Full Stack Engineer to design, build, and test features across their backend and frontend systems. The role involves participating in design discussions, implementation, code review, and testing, with a strong emphasis on engineering quality and communication.ResponsibilitiesDesign, build, and test features across our backend and frontendTake part in design discussions, implementation, code review, and testingSkillsStrong TypeScript and Node.js engineering: You have built and maintained substantial TypeScript services in productionMicroservices design experience: You have built systems composed of multiple services and you have clear understanding of service boundaries, contract evolution, error handling across service calls, and observabilityKafka and event-driven architecture: You have worked with Kafka or a comparable event streaming platform in production. You have a good understanding of topic design, partition strategy, consumer group behavior, idempotency, ordering guarantees, and what happens when a consumer falls behind or a message cannot be processed. Bonus if you have specific experience with ConfluentPostgreSQL: You can design a database schema, and understand transactions, indexing, and migration strategyAWS or equivalent cloud experience with Kubernetes: You are comfortable with operating services in AWS. You can navigate the services we use (e.g. EKS, RDS, S3, CloudWatch, IAM etc.) and you can debug a problem that crosses the boundary between your code and the infrastructure it runs onUnit test frameworks such as jest and vitestPlaywright or equivalent end-to-end testing experience: You have hands-on experience with test authoring frameworks such as Playwright (ideal), Cypress, Selenium, or similarTest design as a discipline: You can take an acceptance criterion or a user story and decompose it into a coverage strategy that includes unit, integration, and end-to-end tests in sensible proportions. You know when an e2e test is the right answer and when a unit test would catch the bug faster and more reliablyEngineering quality as a habit: You think about testability while you designStrong written communication: You write high quality and easy to understand design documents, PR descriptions, Test cases etcSystems thinking across boundaries: You have worked across integration boundaries, have debugged problems that span multiple systemsComfort with ambiguity: You ask clarifying questions, surface assumptions, and do not quietly build whatever is written in the ticketExperience in healthcare, LIMS, or any FDA-regulated software environmentDirect experience with Confluent, Redox, or EHR integration work is a real plusFamiliarity with requirements management tools like JamaHands-on experience with modern AI tools (Claude, Cursor, etcCompany OverviewAt Qualis1 Inc., our robust business model is strategically built upon serving diverse industry sectors, including Finance, Health Care, Education, State Government, and Manufacturing. It was founded in undefined, and is headquartered in Houston, TX, US, with a workforce of 51-200 employees. Its website is https://qualis1inc.com.