Fullstack Developer (React JS+ React Native)

Experience:

Location:

Requirements

• 3-5 years of experience in full-stack development with strong expertise in React.js and React Native
• Proven experience building both web and mobile applications from scratch
• Proficiency in JavaScript (ES6+), HTML5, and CSS3
• Solid backend development experience with Node.js, Express.js, or equivalent frameworks
• Experience working with RESTful APIs, third-party integrations, and JSON
• Familiarity with databases like MongoDB, PostgreSQL, or MySQL
• Strong knowledge of mobile app deployment (App Store, Google Play) and debugging tools
• Excellent English communication skills—both verbal and written
• Comfortable working with international clients across US, UK, and Europe
• Bachelor's degree in Computer Science or related field
  

• Experience with Expo, Firebase, or GraphQL
• Familiarity with TypeScript in React/React Native projects
• Understanding of mobile UI/UX design principles
• Exposure to CI/CD pipelines and deployment automation for mobile and web
• Experience with push notifications, deep linking, or mobile-specific APIs
• Knowledge of performance optimization techniques across platforms
  

Responsibilities

• Build and maintain scalable web and mobile applications using React.js and React Native
• Develop robust backend services and APIs to support frontend and mobile features
• Work closely with design and product teams to turn requirements into functional interfaces
• Optimize applications for performance, speed, and responsiveness across devices
• Manage mobile app submissions, updates, and testing for iOS and Android platforms
• Collaborate with international clients on requirements, updates, and feedback
• Participate in code reviews, technical planning, and project discussions
  

WHAT YOU WILL GET WITH Cognitionteam

• Close cooperation with a customer
• Challenging tasks
• Competence development
• Ability to influence project technologies
• Team of professionals
• Dynamic environment with low level of bureaucracy
  

ABOUT Cognitionteam