Mobile Software Engineer (senior/staff level)

Joko; Paris; Remote; EUR 70,000 - 110,000; Full time

Job summary

Joko, a Paris-based AI shopping app, is hiring a Mobile Engineer to own meaningful parts of the mobile app in production, from technical design to delivery and continuous improvement.

You will work closely with the product and engineering teams on React Native architecture, codebase modernization, performance optimization, and developer tooling to deliver fast, reliable experiences for millions of users. This remote-friendly role supports France and Spain.

Responsibilities

• Own meaningful parts of the mobile application in production, from technical design to delivery and continuous improvement.
• Define and evolve the React Native architecture for scalability, maintainability and performance.
• Improve the codebase by adopting modern patterns, best practices and platform capabilities.
• Measure, profile, and optimize mobile performance and user experience.
• Enhance tooling and developer experience to enable fast feedback loops.

Skills

React Native

Mobile architecture

Performance optimization

Collaboration with product

Job description

At Joko, our mission is to we help consumers save time and money when shopping online or in-store.

Founded in Paris, Joko is a tech company and certified B Corp with over 120 talents across Paris, Barcelona, and New York (and beyond). More than 7 million users already save money every day at 10,000+ merchants with Joko.

From cashback and automatic coupons to price alerts, we've kept expanding our products to make shopping smarter. Today, Joko is an AI shopping app: with Juno, our shopping assistant, users can find the right product at the best price in only a few seconds, with recommendations that get sharper the more they use it.

Having reached profitability in our core market, we’re now scaling globally, with a strong focus on the US.

It’s still day 1, come build the future of shopping with us!

This position is remote-friendly (France and Spain).

Our Engineering team

Our Engineering team excels at solving cutting-edge technical challenges with elegant solutions. With a strong focus on product innovation and design, they are shaping the future of the shopping experience. Their ambition is to have a positive impact on the everyday lives of hundreds of millions of users around the world.

Software Engineers in the Engineering team work hand-in-hand with the Product team, from exploration, design, and roadmap prioritization to implementation, and deployment in production. At Joko, we have firsthand experience that teams with engineers who possess a diverse range of skills, and where engineering and product collaborate closely, are able to deliver a truly delightful and innovative user experience.

The Engineering team is currently growing fast to continuously innovate on all parts of our product and tech stack and to empower the revolution of the way people shop online.

What you will do

At Joko, we value ownership and impact. As our Mobile Engineer, you will own meaningful parts of our mobile application in production, from technical design to delivery and continuous improvement, while collaborating closely with the wider engineering team.

• Mobile architecture & development: Contribute to the definition and evolution of our React Native architecture, while designing, developing, and refactoring features in our mobile application, with a strong focus on scalability, maintainability, and performance.

• Codebase modernization: Incrementally improve an existing React Native codebase by adopting modern patterns, best practices, and platform capabilities, balancing long-term quality with short-term product needs.

• Performance & user experience: Measure, profile, and optimize mobile performance (startup time, rendering, memory, caching), proactively preventing regressions and maintaining a high-quality user experience at scale.

• Tooling & developer experience: Improve mobile developer productivity by evolving tooling, build systems, debugging workflows, and automations, ensuring fast feedback loops