Senior JavaScript Full-Stack Developer

We are seeking an experienced Senior JavaScript Full-Stack Developer to build and evolve production web systems. You will deliver accessible, high-performance UIs and reliable JVM- and TypeScript-based services on cloud infrastructure. Apply to help shape and ship key platform capabilities! Responsibilities Design full-stack solutions that meet product needs with clear trade-offs and scalable patterns Build TypeScript and React features with accessible UI patterns and strong client performance Develop backend services and shared libraries using Java or Kotlin on the JVM and TypeScript where appropriate Implement service-to-service communication using gRPC/protobuf and integrate HTTP/REST APIs Model and evolve data in DynamoDB and PostgreSQL to support product features and reliability Operate effectively within AWS environments, containers, and CI/CD pipelines to ship safely Write and maintain unit, integration, and end-to-end tests to protect quality and delivery speed Coordinate cross-team technical decisions and drive design reviews to align implementations Improve observability and debuggability through structured logging and tracing practices Document architecture, interfaces, and operational guidance to support long-term ownership Requirements 3+ years of full-stack web engineering experience shipping production systems Proficiency in TypeScript and React, including state management Deep knowledge of UI accessibility patterns and browser performance optimization Solid backend skills in Java or Kotlin on the JVM, or TypeScript for shared libraries Extensive experience with gRPC + protobuf, HTTP, and REST Hands-on data modeling experience with DynamoDB and PostgreSQL Practical cloud platform experience using AWS, containers, and CI/CD as a consumer Rigorous testing discipline across unit, integration, and end-to-end tests Excellent collaboration and communication skills across teams Clear technical writing skills for designs and operational runbooks Upper-Intermediate English proficiency (B2) Nice to have Cross-platform mobile framework experience such as React Native, Kotlin Multiplatform, Flutter, or Capacitor Authentication and identity systems knowledge, including OAuth, OIDC, SSO, and third-party providers Experience with OpenTelemetry and structured logging tooling Experience building design systems and shared component libraries Familiarity with authoring tools, CMSes, or internal back-office applications