Senior Full-Stack Engineer

Company DescriptionUdext is building the operating system for the frontline workforce - helping organizations communicate, engage, and support employees at scale through SMS-first technology.Role DescriptionWe’re looking for a talented and versatile Senior Full-Stack Engineer to join our core team and help shape the future of the product.As an early engineering hire, you won’t just write code - you’ll help define how the system is built, scaled, and experienced by thousands of users. You’ll work across the entire stack, from backend systems and APIs to frontend product experiences, owning problems end-to-end.This is a high-impact role where your work will directly influence product direction, system architecture, and company growth.QualificationsStrong knowledge of JavaScript and ECMAScript 6 standardsBuild and maintain modern, responsive UI using React (Next.js)Develop scalable component architecture and reusable UI librariesImprove user experience and performance across web and mobile interfacesCommercial experience with Node.js.Commercial experience working with high-load SQL or NoSQL databases.Commercial experience implementing REST, GraphQL, and WebSocketsUnderstanding of Test-Driven Development (TDD) principles and experience writing testsExperience with Git version control system.Experience with Redis.Experience with databases such as MongoDB and PostgreSQLAbility to own and lead the backend and frontend architecture domain of the system.Hands-on experience working with AWSAbility to work and communicate in a fast-paced startup environmentPreferred QualificationsHands-on experience developing with CI/CD pipelines, microservices architecture, and containers.Ability to build and ship projects from scratch independentlyEntrepreneurial mindset with a strong sense of ownership and initiativeDuties And OpportunitiesIn-house platform development.Third-party API integrations.Actively participate in developing & maintaining new features from scratch.Take ownership of the backend and frontend architecture of the system, shaping its design and implementation.