Java Developer

Job Title

Java Developer – Mobile Engineering (React Native)

Description

We are seeking a hands-on mobile engineer to build, maintain, secure, and support enterprise-grade mobile applications for iOS and Android using React Native, Expo and TypeScript. This role will translate business and design requirements into high-quality technical solutions, integrate with enterprise services, and support CI/CD and release processes. Strong engineering discipline across code quality, testing, security, performance, accessibility, and production support is essential.

Location: Sandton, JHB. Work from office mandatory — 8 hours in office per day.  Duration: 6 months with possibility of renewal. All checks must be clear prior to engagement.

Duties & Responsibilities

Responsibilities

• Develop and maintain cross-platform mobile applications using React Native, Expo and TypeScript.

• Implement polished UI from Figma, wireframes, and design systems with attention to accessibility and performance.

• Integrate mobile apps with enterprise RESTful APIs, authentication flows and secure storage mechanisms.

• Support and maintain CI/CD pipelines in Azure DevOps (YAML), including automated builds, testing, signing and release approvals.

• Manage monorepo layouts, shared packages and mobile workspace tooling to ensure reliable developer workflows.

• Implement automated testing, TDD/BDD practices and mobile quality gates to maintain high release quality.

• Use observability and error reporting tools (Dynatrace, Sentry, Splunk) to monitor and troubleshoot production issues.

• Manage app signing, distribution and release processes via App Store Connect, TestFlight, Google Play Console and internal distribution channels.

• Participate in code reviews, maintain Git workflows, and work within Agile/Scrum delivery teams.

• Employ AI-assisted development tools responsibly to increase productivity while maintaining code quality and engineering judgement

Skills

• React Native

• Expo

• TypeScript

• JavaScript

• React

• State Management

• Navigation Patterns

• iOS

• Android

• Dynatrace

• Sentry

• Splunk

• Monorepos

• Dependency Management

• Azure DevOps

• CI/CD

• YAML Pipelines

• Secure Secrets Management

• Automated Builds

• Automated Testing

• App Signing

• App Store Connect

• TestFlight

• Google Play Console

• RESTful APIs

• Authentication Flows

• Secure Storage

• Mobile Security

• Performance Optimization

• Accessibility

• Observability

• Production Support

• Test-Driven Development

• Behavior-Driven Development

• Mobile Quality Gates

• Figma

• Design Systems

• Git

• Code Review

• Agile

• Scrum

• GitHub Copilot

• ChatGPT

• OpenAI Codex

• Cursor

• Swift

• Kotlin

• Mobile Workspace Tooling

• Shared Packages

• Digital Banking

• Payments

• Foreign Exchange

• Lending

Desired Experience & Qualification

Qualifications

• Proven experience building and maintaining enterprise iOS and Android applications using React Native and Expo.

• Strong TypeScript and JavaScript fundamentals with modern React patterns.

• Practical experience with Azure DevOps CI/CD pipelines, secure secrets management, automated builds and release approvals.

• Experience with app signing and distribution via App Store Connect, TestFlight and Google Play Console.

• Solid knowledge of mobile security, performance optimization, accessibility and production support practices.

• Familiarity with observability and error/analytics tooling such as Dynatrace, Sentry or Splunk.

• Experience with automated testing approaches and TDD/BDD workflows.

• Excellent communication, collaboration and delivery discipline within Agile teams.

• All background and compliance checks must be completed and clear before start.