Senior Mobile Engineer - React Native & TypeScript

Computer Services, Inc.; United States; On-site; USD 120,000 - 150,000; Full time

Job summary

Computer Services, Inc. (CSI) is seeking a Software Engineer III to design, code, test, and debug scalable mobile apps using React Native and TypeScript for iOS and Android. You will focus on performance, usability, and reliability while integrating with banking core systems and third-party services.

Lead large mobile projects, enforce best practices, mentor peers, and contribute to modernization efforts in a regulated financial tech environment. Strong collaboration across teams is essential.

Qualifications

• 5+ years of software engineering experience with mobile development.
• 4–5 years of hands-on React Native and TypeScript with API and third-party integrations.
• Experience with financial systems or regulated environments preferred.
• College degree in software engineering or related field or equivalent experience.
• Strong engineering fundamentals: clean code, scalable architecture, performance, testing, reliability, security, and documentation.
• Clear communicator across engineering, product, design, QA, security, architecture, and business teams.
• Ability to manage competing priorities in an Agile environment.

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.
• 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

Agile

Education

Bachelor's degree in software engineering or related field

Job description

Computer Services, Inc. (CSI) is seeking a Software Engineer III to design, code, test, and debug scalable mobile apps using React Native and TypeScript for iOS and Android. You will focus on performance, usability, and reliability while integrating with banking core systems and third-party services.

Lead large mobile projects, enforce best practices, mentor peers, and contribute to modernization efforts in a regulated financial tech environment. Strong collaboration across teams is essential.