Software Engineer III - React Native (TypeScript)

BOK Financial•Bonner Springs, KS

6d•Hybrid

About The Position

In this role, you’ll mentor the project team, share knowledge, and collaborate with the Solution Architect to determine project architecture. You’ll lead development efforts, promote best programming practices, and influence engineering standards across the team. You’ll also provide application support, develop and document applications, and maintain system documentation and configuration. This role is focused on driving cross-platform mobile strategy and architecture, with an emphasis on React Native and long-term platform evolution. As a Senior Software Engineer, you’ll be a hands-on technical leader and key contributor in a cross-functional team, often acting as a technical lead. You’ll design, build, and ship cross-platform mobile applications using React Native (TypeScript), integrating with modern backend services on AWS. You’ll drive execution, mentor engineers, and champion operational excellence in mobile development while helping define and evolve our overall mobile platform strategy. Our mission is to empower our company, teammates, and customers through resilient, customer-centric technology. We leverage our technical expertise and deep business understanding to deliver impactful solutions.

Requirements

5–8+ years of software engineering experience, including significant experience building cross-platform mobile applications using React Native (TypeScript)
Proven experience delivering React Native applications end-to-end, including architecture, development, and deployment
Strong understanding of modern mobile application architecture patterns
Production experience integrating with RESTful APIs
Strong testing discipline, CI/CD experience, and code review best practices
Experience with mobile release processes and production support
Bachelor’s degree in a technology-related field and/or 8+ years of related experience.

Nice To Haves

Native mobile development experience (Android and/or iOS)
Experience with mobile CI/CD automation (e.g., Fastlane) or feature flag systems
Experience with accessibility standards and internationalization
Familiarity with AI-assisted development tools (GitHub Copilot, Amazon Q, Claude)
Exposure to DevSecOps practices
PCI and SOX awareness
Technology certifications are preferred.
Experience in banking or financial services is also preferred.

Responsibilities

Architect and implement cross-platform mobile applications using React Native and TypeScript, following best practices for performance, accessibility, and maintainability.
Deliver features using scalable React Native architecture patterns, shared component libraries, and modular design approaches that support long-term maintainability and reuse.
Implement robust API integrations and handle authentication and authorization for secure, scalable mobile applications.
Develop using AI-assisted workflows with tools such as GitHub Copilot and Claude to accelerate coding, refactoring, documentation, and test generation.
Leverage agentic patterns for multi-step tasks such as feature scaffolding, modernization efforts, UI generation, dependency analysis, and CI/CD interactions, with appropriate human oversight.
Apply AI-assisted pull request reviews and security scanning, validating outputs with strong engineering judgment and secure-by-design principles.
Continuously evaluate and improve the use of AI tools across the SDLC to increase throughput, quality, and developer experience.
Own testing strategy, including unit and integration testing using JavaScript/TypeScript frameworks (e.g., Jest, React Testing Library), along with mobile end-to-end testing approaches where appropriate.
Shape mobile CI/CD pipelines supporting React Native builds and deployments using tools such as Fastlane, CircleCI, or equivalent.
Instrument applications using tools such as Firebase and New Relic to monitor performance, crash rates, and user behavior.
Follow secure coding practices and address vulnerabilities proactively; familiarity with PCI and SOX environments is beneficial.
Lead design reviews, mentor team members, and enforce high standards for code quality and maintainability.
Practice full ownership from development through production, supporting a build-it/run-it model.