Lead React native Developer | 8-17 Years | IC role | Build Scalable Technology for a Global Retail Leader |

Geektrust; Bengaluru; On-site; INR 3,000,000 - 6,000,000; Full time

Job summary

Tesco is seeking a skilled Software Development Engineer III with deep React Native experience to design, build and maintain high-performance cross-platform mobile apps from a single codebase. You will work with Product Managers, UI/UX designers to translate requirements into scalable solutions and leverage Expo tools, EAS, and Expo Router for efficient delivery.

The role emphasizes leadership in technical depth, ownership of features, and collaboration across teams.

Qualifications

• Bachelor’s or Master’s degree in computer science.
• 8+ years as a Software UI Engineer in Enterprise or Product companies.
• Experience with React Native and Expo ecosystem.

Responsibilities

• Develop and maintain cross-platform mobile applications using React Native.
• Collaborate with product managers, designers and backend engineers to deliver seamless experiences.
• Optimize apps for speed and scalability and ensure accessibility and security.
• Write clean, maintainable code following best practices and participate in code reviews.
• Stay updated with industry trends and implement modern tooling and testing.

Skills

React Native

Expo SDKs

React Hooks

Context API

Component Libraries

Agile

Git & CI

Performance Profiling

Accessibility AA

GraphQL/REST

Flexbox/Grid

CSS/SASS

Education

Bachelor’s/Master’s in CS

Tools

Webpack

Babel

Jest

Appium

RNTL

Expo Router

EAS

GitHub

Job description

Opportunity with one of the world’s leading retail companies, headquartered in the UK, serving millions of customers through its supermarkets, convenience stores, and online platforms. The company combines large-scale retail operations with technology to enhance customer experiences, improve supply chain efficiency, and enable data-driven decision-making. Its technology teams work on areas such as e-commerce, cloud platforms, data and analytics, automation, and scalable digital solutions.

Role overview:

Qualifications

• 1. Bachelor’s/master’s degree in computer science
• 2. Minimum 8+ years’ experience as a Software UI Engineer in Enterprise or Product companies

Technical Skills

• 1. 4 years developing Reactive Native Front End App Experiences using React Native the rest 4 building Front End App Experience modern ES6+ concepts
• 3. Strong command of React Principles, React Hooks, Context API, and Component lifecycles
• 4. Knowledge of how to use Component Libraries to build applications
• 5. Hands-on experience with the latest Expo SDKs, Expo Router (file-based routing), and EAS workflows
• 6. Should understand concepts around caching and how to achieve the same
• 7. Proven experience with state management libraries such as Zustand, Redux Toolkit, or MobX
• 8. Deep understanding of iOS and Android deployment Lifecycles, application signing, and app store guidelines
• 9. Deep skills of Git, GitHub, and continuous integration pipelines
• 10. Proficient in using Agentic AI to leverage spec, skills and agents to do 50% of their work across development, documentation and testing
• 11. Experience in determining performance profiling for Prod ready Apps
• 12. Knowledge and understanding of Accessibility AA Standards
• 13. Experience in designing, programming, and implementing large scale UI system
• 14. Experience in integrating front end UI/mobile applications with backend API’s built using GraphQL or REST
• 15. Knowledge of Flexbox and CSS Grid based systems
• 16. Knowledge of CSS pre-processing platforms, such as SASS or LESS
• 17. Experience with testing frameworks (Jest, Maestro, Appium, RNTL)
• 18. Have used packaging tools like Webpack or Babel
• 19. Understanding of mobile app deployment (App Store, Google Play Store)
• 20. Knowledge of design tools like Figma and how to use them
• 21. Understanding of SEO and Deep Linking is Important

Process Skills

• 1. Should be understanding and practicing Agile methodologies
• 2. Should be using Scrum or Kanban
• 3. Should be familiar using tools like JIRA and Confluence
• 4. Should be familiar with concepts like EPICS, Stories, Tasks, Acceptance Criteria

Soft Skills

• 1. Can take a lead on things
• 2. Takes ownership
• 4. Excellent analytical and problem-solving skills
• 7. Excellent written and verbal communication skills

What would you do here

As a Software Development Engineer III you are in a senior Individual Contributor engineering role. Your proficiency with foundational computer science and software engineering concepts is taken as a given, and you will have proven significant technical depth and breadth. At this level you will be playing an active role in technical leadership, with proven impact across teams and the wider directorate. You take ownership and accountability of the development of the products in your domain. You participate in activities that build capability across the organisation: coaching and mentoring of existing colleagues, and interviewing/hiring of new colleagues.

• 1. My impact reaches beyond my immediate team
• 2. At this level I display a high degree of ownership for the work conducted by the team
• 3. I can anticipate feature evolution of my product
• 4. I am comfortable managing competing priorities
• 5. I build capability and raise the bar by contributing to hiring and interviewing practices.

We are seeking a skilled React Native Mobile App Developer with strong expertise in the Expo ecosystem to design, build and maintain high-performance cross-platform mobile applications. In this role, you will leverage Expo and its modern suite of tools (like EAS and Expo Router) for development and deliver Tesco design system aligned native experiences for both iOS and Android platforms from a single codebase. You will collaborate closely with Product Managers, UI/UX Designers to translate requirements into scalable solutions.

Key Responsibilities

• 1. Develop and maintain cross-platform mobile applications using React Native
• 2. Work on a day-to-day basis with Agentic AI to leverage spec, skills and agents to do 50% of their work across development, documentation and testing
• 3. Collaborate with engineering managers, product managers, designers and backend developers to deliver seamless user experiences
• 4. Optimize applications for speed and scalability
• 5. Have a clear understanding of how to build accessible and secure applications
• 6. Write clean, maintainable and reusable code following best practices
• 7. Debug and resolve technical issues across web and mobile platforms
• 8. Integrate APIs and third-party libraries into applications
• 9. Stay updated with the latest industry trends, emerging patterns and standards