Fullstack Developer (React JS+ React Native)

Cognitionteam; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading software development partner in the UK seeks a Full-Stack Developer with extensive experience in React.js and React Native. The ideal candidate will build scalable web and mobile applications and develop robust backend services. Strong English communication skills and a Bachelor's degree in Computer Science are required. Join a dynamic environment with professional growth opportunities and influence over project technologies.

Benefits

Close cooperation with customers

Challenging tasks

Ability to influence project technologies

Team of professionals

Dynamic environment with low level of bureaucracy

Qualifications

• 3-5 years of experience in full-stack development with strong expertise in React.js and React Native.
• Proven experience building web and mobile applications from scratch.
• Solid backend development experience with Node.js, Express.js, or equivalent frameworks.

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.
• Optimize applications for performance, speed, and responsiveness across devices.

Skills

React.js

React Native

Node.js

Express.js

RESTful APIs

MongoDB

PostgreSQL

MySQL

English communication

Education

Bachelor's degree in Computer Science or related field

Job description

Experience: 3-5 years

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
• 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

NICE TO HAVE

• 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
• Ability to influence project technologies
• Team of professionals
• Dynamic environment with low level of bureaucracy

Cognitionteam is the partner of choice for few of world’s leading corporations, SMEs, and technology competitors. We help companies elevate their value through custom software development, product design, QA, and consultancy services..

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