Senior Mobile Engineer - React Native & TypeScript

CSI; United States; Remote; USD 120,000 - 150,000; Full time

Job summary

Computer Services, Inc. (CSI) seeks a Software Engineer III to design, code, test, and debug scalable mobile apps using React Native and TypeScript for iOS and Android.

You will contribute to modernization and integration with banking core systems, maintaining high performance and usability across platforms. You will lead large mobile projects, enforce best practices, mentor peers, and drive architecture discussions with frontend, backend, and integration teams in a regulated financial

Qualifications

• 5+ years of professional software engineering experience with mobile development.
• 4-5 years hands-on React Native and TypeScript experience including API, backend service, and third-party integrations.
• Experience with financial systems, banking platforms, core integrations, or regulated technology environments preferred.
• College degree in software engineering, or related field or equivalent industry experience required.
• Strong engineering fundamentals, including clean code, maintainable architecture, performance, testing, reliability, security awareness, and documentation.
• Clear communicator who can collaborate across engineering, product, design, QA, security, architecture, and business teams.
• Ability to manage competing priorities in an Agile environment while balancing delivery, support, technical debt, and quality.

Responsibilities

• Own development and rollout of large mobile projects and cross-platform solutions integrated with backend systems.
• Enforce best practices in React Native, TypeScript, mobile performance, and responsive design.
• Deliver high-quality mobile features efficiently and on time.
• Define mobile architecture, APIs, and integration risks (performance, compatibility, dependencies).
• Promote Agile, CI/CD, and mobile best practices; mentor peers.
• Apply modern mobile technologies and evolving TypeScript ecosystem.
• Strong in React Native and TypeScript; collaborate across backend and integrations.
• Drive mobile UX, architecture, and integration strategy in online banking domain.
• Guide engineers in scalable mobile development.
• Support team effectiveness and cross-functional initiatives.

Skills

React Native

TypeScript

API integration

Backend services

Third-party systems

Mobile architecture

Agile

Communication

Education

Bachelor's degree in software engineering or related field

Tools

CI/CD

Job description

Computer Services, Inc. (CSI) seeks a Software Engineer III to design, code, test, and debug scalable mobile apps using React Native and TypeScript for iOS and Android.

You will contribute to modernization and integration with banking core systems, maintaining high performance and usability across platforms. You will lead large mobile projects, enforce best practices, mentor peers, and drive architecture discussions with frontend, backend, and integration teams in a regulated financial