OverviewAt Mattermost, we build the #1 collaborative workflow solution for defense, intelligence, security, and critical infrastructure organizations. Trusted by governments, financial institutions, and technology companies, our platform enables secure, real-time collaboration for the world’s most critical teams. We are dedicated to empowering organizations to operate with confidence, reduce risks, and accelerate productivity. Our values include Customer Obsession, Earn Trust, Self Awareness, Ownership and High Impact, and we collaborate closely with our customers to deliver solutions that meet complex needs and drive success.Mattermost is seeking a talented and passionate React Native Engineer to join our mobile engineering team and help deliver world-class mobile experiences for mission-critical industries. You will be responsible for building and maintaining React Native applications that enable secure, real-time collaboration for organizations where reliability and security are non-negotiable. You will work closely with cross-functional teams to create mobile solutions that solve complex communication challenges in high-stakes environments, with the opportunity to contribute to our open-source platform while building mobile applications that serve important missions.Do you have a passion for designing and developing high-impact products? Do you want to work with a well-oiled, collaborative and highly senior team? Do you want to make an impact on open source? Help us build and grow one of the largest React Native and Go open-source projects.ResponsibilitiesDesign, develop, and maintain high-performance capabilities for the Mattermost React Native application for iOS and Android platformsBuild responsive, accessible mobile interfaces that work seamlessly across different devices and screen sizesImplement secure communication features, push notifications, and real-time messaging capabilitiesOptimise mobile app performance, including bundle size, startup time, and memory usageCollaborate with backend engineers to integrate mobile apps with APIs and ensure smooth data synchronizationContribute to Mattermost's open-source React Native codebase, sharing solutions with the broader developer communityWork with product managers and designers to translate user requirements into technical solutions and prototypesImplement comprehensive testing strategies including unit tests and automated end-to-end testingDebug and resolve mobile-specific issues across different platforms, devices, and operating system versionsParticipate in code reviews and provide mentorship to colleagues on mobile best practicesStay current with tools, libraries and frameworks including advancements in AI/LLM tools and best practicesEnsure our mobile application meets strict security and compliance requirements for enterprise and government clientsRequirementsBS in Computer Science, Computer Engineering, or related field/experience3+ years of professional experience developing mobile applications with React NativeStrong proficiency in JavaScript/TypeScript and React ecosystem including hooks, state management, and component architectureExperience with native iOS and Android development concepts and the ability to write native modules when neededSolid understanding of mobile app deployment processes for both App Store and Google Play StoreProficiency with AI/LLM tools to improve and accelerate developmentKnowledge of mobile-specific patterns including navigation, offline functionality, and platform-specific UI guidelinesExperience with state management libraries (Redux, Zustand, or similar) and async data handlingProficiency with reactive programming patterns using RxJS and experience with local database solutions like WatermelonDBFamiliarity with mobile testing frameworks and debugging tools for React Native applicationsUnderstanding of mobile security best practices and secure coding principlesStrong problem-solving skills and ability to work independently in a remote, distributed team environmentExcellent written and verbal communication skills for collaborating across time zonesFor candidates applying in the United Kingdom: You must have the permanent right to live and work in the UK at the time of application. Please note that we are unable to provide visa sponsorship for this role.PreferencesPrevious experience building end user products for enterprises or security-focused usersContributions to open-source projectsKnowledge of accessibility standards and implementing inclusive mobile experiencesHas worked fully remotely with global teamsExpertise in defence, intelligence, or security-focused workflowsEEO and Hiring InformationMattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.Mattermost is an EEO Employer, we are a remote-first, open-source company. We are continually working to expand our hiring in more countries and regions, ensuring compliance with local laws and regulations, which takes time. Mattermost values your unique perspective—we welcome all applicants. We encourage individuals from all backgrounds to apply and are committed to assessing candidates based on their skills and qualifications. We do not tolerate discrimination against staff or applicants based on race, religion, national origin, age, disability, pregnancy status, veteran status, or other personal characteristics. If you require accommodations during the interview process, please let us know—we’re happy to assist. #J-18808-Ljbffr