About the job
Blockchain has connected millions of people to digital finance since 2011. Over 90 million wallet holders and 40 million verified users have used the platform to move more than $1 trillion securely. The company continues to build trusted tools for cryptocurrency transactions worldwide.
The team seeks a Senior React Native Engineer based in Buenos Aires. This position will help shape the next stage of Blockchain’s mobile architecture, focusing on modular, multiplatform systems that enable faster launches of new consumer apps. The work involves building high-quality React Native applications for both iOS and Android by reusing components from the existing stack.
What you will do
- Design and build scalable React Native apps using shared modules from mobile and backend systems.
- Lead the architecture of a modular, reusable system to quickly assemble new apps from core components like authentication, wallet, trading, and on-ramp/off-ramp features.
- Define and maintain clear module boundaries to support flexibility and long-term reliability.
- Drive complex projects from technical design through delivery and iteration, collaborating with multiple teams.
- Translate broad product ideas into structured technical plans, balancing speed, quality, and scalability.
- Use AI-assisted development tools (such as Claude and Codex) to accelerate development, while upholding standards for accuracy, performance, and security.
- Review and refine AI-generated code to ensure it meets production standards.
- Advance shared UI systems, component libraries, and developer tools to support team productivity.
- Take responsibility for the quality, performance, and reliability of systems, including monitoring and debugging in production.
- Mentor junior engineers, participate in code reviews, and help raise engineering standards across the team.
- Work closely with Product, Design, Backend, and Mobile teams to deliver integrated user experiences.
- Support release processes, app store submissions, and ongoing improvements after launch.

