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

Geektrust; Bengaluru; On-site; INR 4,000,000 - 6,000,000; Full time

Job summary

Tesco seeks a Senior Software UI Engineer to design, build, and maintain high‑performance cross‑platform mobile apps. You’ll leverage React Native, Expo, and EAS/Router to deliver Tesco design system aligned experiences for iOS and Android from a single codebase.

You’ll collaborate with product managers and UI/UX designers to translate requirements into scalable solutions, while mentoring peers and driving technical excellence in an Agile environment.

Qualifications

• Bachelor’s or Master’s degree in computer science.
• 8+ years of experience as a Software UI Engineer inEnterprise or Product companies.
• Strong React Native experience with Expo ecosystem and UI tooling.

Responsibilities

• Develop and maintain cross‑platform mobile apps using React Native.
• Collaborate with product/design and backend teams to deliver seamless UX.
• Lead technical initiatives and mentor junior engineers.
• Ensure accessibility and performance optimizations.
• Integrate APIs (GraphQL/REST) and manage CI/CD pipelines.

Skills

React Native

Expo ecosystem

UI engineering

React Hooks

State management (Redux, Zustand, MobX

GraphQL/REST API integration

TypeScript/ES6+

Accessibility AA standards

Testing frameworks (Jest, Appium, RNTL

CI/CD & GitHub workflows

Figma design collaboration

CSS (Flexbox/Grid)

GIT/GitHub

Performance profiling

Mobile app deployment (App Store/Play)

Agile methodologies (Scrum/Kanban)

Webpack/Babel

Accessibility testing

GraphQL/REST integration

Expo Router & EAS

Education

Bachelor’s/Master’s degree in computer science

Tools

Git & GitHub

Webpack

Babel

Jest

Appium

Maestro

RNTL

Figma

Expo

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