Software Development Engineer II. (React Native)

About the role

Let’s build the future of shopping together at Tesco Technology 

We’re looking for React Native engineers to help build products used by millions of customers every day. 

You’ll work on high-impact features, contribute to our cross-platform direction, and collaborate closely with Product, Design, and other engineers. The team is actively evolving how it builds, so there’s real opportunity to influence both the technical direction and the way we work. 

Day to day, you’ll be turning ideas into simple, fast, and reliable mobile experiences. That includes building new features, improving what’s already there, and making sure everything scales and performs well in real-world conditions. 

The focus is straightforward: build things that work well, hold up at scale, and genuinely make life easier for customers. 
 

Project spotlight: Whoosh (Tesco UK rapid delivery) 

You may join work on Whoosh, Tesco’s market-leading rapid grocery delivery service in the UK. 

• Operates from 1,600 stores 

• Reaches 70%+ of UK households 

• Delivers in 20–30 minutes 

• Offers a significantly larger range than typical rapid delivery apps (2,500–4,500 products) 

Whoosh is already embedded in the Tesco mobile app used across markets, including Hungary (currently turned off locally). While the app is native today (iOS and Android), we’re shifting towards React Native with Expo. 

This creates a great opportunity to: 

• Build new features in React Native from scratch 

• Gradually migrate existing native functionality where it makes sense 

• Help shape how a large-scale app evolves towards a cross-platform setup 

You’ll be joining a mixed team of experienced web, iOS, and Android engineers, many of whom are transitioning into React Native. Because of this, a big part of the role is helping raise the bar and shape how the team works across platforms over time. 

Initially, your focus will be on React Native. Over time, you’ll also contribute to delivering features across both web and mobile, helping us keep the experience aligned across platforms. 

What is in it for you Tesco is a diverse and exciting employer, dedicated to being #aplacetogeton, providing career-defining opportunities to all of our colleagues. If you chose to join our business, we will provide you with: 

• Permanent contract from the go – as a sign of our trust in your abilities 
• Yearly salary bonus – based on both individual and business performance 
• Extensive private healthcare - complex care package including a wide range of specialists, medical services, and free flu vaccination 
• Cafeteria  
• Relocation Help - professional service to secure relevant working permits and other necessary documents 
• Learning opportunities - certified technical training and learning platforms like Udemy, Pluralsight, and O'Reilly 
• Referral Bonus 
• Learning culture and excellent opportunities to develop your career within your chosen field or something altogether new 
• Varied and exciting projects to play a part in – there is always something new and exciting in the pipeline 

If that sounds exciting, then we'd love to hear from you.  You will be responsible for

• Build high-quality mobile features using React Native (+ Expo) 
• Help shape architectural decisions for cross-platform development 
• Balance speed and quality while delivering customer-facing value 
• Collaborate across mobile, web, and platform teams 
• Tackle real-world mobile challenges—performance, device fragmentation, network constraints 
• Prototype, iterate, and turn ideas into production-ready features 
• Support and mentor teammates as the team grows into a cross-platform model 

You will need

• Strong experience building production React Native applications 
• Comfortable working across both mobile and web when needed, or open to picking it up 
• Confidence designing and scaling complex mobile architectures 
• Solid understanding of mobile platform constraints and trade-off