Overview:
KEO is a creative enterprise, where innovation is a way of life. We are uniquely resourced with end-to-end services to take clients from inspiration – through conceptualization – to realization of planning, design or project delivery in the built and natural environments. For over 60 years we’ve led with vision, contributing to many of the world’s most ambitious projects, iconic places, remarkable experiences and prosperous communities.
As a highly integrated and agile AEP/PMCM firm, KEO is recognized by ENR as one of the Top 225 International Design Firms and one of the Top 20 International PM/CM Firms. We are also ranked by World Architecture as the 51st largest global architecture firm and the #1 Firm in the Middle East Region in their 2024 WA100 Survey.
We invite you to join us. Why?
When you join KEO, you’ll discover more than just a job – you’ll find a supportive environment that fosters your professional development through internal global mobility and career development and does so within a culture that supports company-wide health and well-being through on-demand counselling services and regular workplace clinics. You will be invited to celebrate community events such as sports days, fun-runs, in-house sports teams and beach clean ups. In addition to your competitive package and benefits you will have access to a suite of policies that include hybrid working arrangements, individual athletic sponsorship, study assistance sponsorship, employee referral rewards.
Responsibilities:
JOB SUMMARY
The Senior Mobile & Web Engineer is the driving force behind KEO Group's mobile products, building cross-platform apps with React Native on the Expo platform and shipping them to the App Store and Google Play through EAS. You will own the mobile experience end to end - UI, navigation, and state management through API integration, offline behaviour, push notifications, rich data visualizations, and EAS-powered releases - and extend the same craft to responsive web applications with React and Next.js. Working alongside back-end and platform specialists in the Enterprise Digital Solutions team, this is a role for a product-minded engineer who cares about performance, polish, security, and shipping: your apps will be used daily on construction sites and in boardrooms across an international consultancy, with opportunities to embed AI-powered experiences as the portfolio grows.
KEY TASKS AND RESPONSIBILITIES
Mobile Application Development
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Design, build, and ship cross-platform mobile applications with React Native, Expo, and TypeScript for Android and iOS - from concept and prototype through production release on Google Play and the App Store.
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Implement clean, responsive, accessible mobile UI using modern navigation and state management patterns (React Navigation; Redux, Zustand, or React Query).
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Build offline-first experiences - local storage, caching, background sync, and conflict handling - so apps remain useful in low-connectivity project and site environments.
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Integrate secure authentication (OAuth 2.0 / Entra ID / MSAL), push notifications (FCM and APNs), deep linking, and device capabilities such as camera, GPS, and file handling.
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Build rich, interactive charts, graphs, and dashboards inside mobile apps - using libraries such as Victory Native, react-native-svg, or Skia-based charting - that turn project and operational data into insight at a glance.
Web Application Development
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Design and build modern, responsive web applications with React and Next.js - server-side rendering, routing, state management, and REST/Microsoft Graph API integration.
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Deliver polished, accessible, high-performance web UI - responsive layouts across devices, WCAG-aware accessibility, and Core Web Vitals-conscious optimization.
Quality, Release & Operations
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Own mobile release engineering on the Expo platform: EAS Build, EAS Submit, and EAS Update for code signing, store submissions, staged rollouts, and over-the-air updates - keeping every release smooth and predictable.
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Instrument applications with crash reporting and analytics; profile and optimize startup time, rendering performance, memory, and battery usage.
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Write automated tests (Jest, React Native Testing Library, Detox) and maintain strong engineering hygiene - code review, linting, and documentation - across the mobile codebase.
Integration & Collaboration
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Consume and help shape the REST and Microsoft Graph APIs powering mobile experiences, collaborating with back-end (.NET/Azure) developers on API contracts, security, and performance.
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Participate in business requirements analysis and process re-engineering workshops, helping stakeholders articulate problems precisely before designing solutions.
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Ensure that Health, Safety, Sustainability, and Continual Improvement principles are embedded in all work practices.
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Performs other duties as assigned.
Qualifications:
- Typically, 5-8 years of professional front-end and mobile development experience, including 2+ years with React Native and at least one application shipped to production on both Google Play and the Apple App Store.
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Fluent in the Expo ecosystem: Expo SDK and modules, EAS Build, EAS Submit, and EAS Update (over-the-air), including managing app configuration, environments, and store credentials through the Expo toolchain.
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Strong React and TypeScript/JavaScript (ES6+) fundamentals: hooks, component patterns, state management, and rendering performance optimization.
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Strong command of Next.js for building responsive, component-based and server-rendered web applications - routing, data fetching, and deployment-ready builds - with solid HTML5 and CSS3 for responsive design.
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Hands-on experience integrating REST and OAuth-secured APIs from mobile clients - token lifecycles, pagination, retries, and graceful error and offline states.
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Strong data visualization skills for mobile: building performant, interactive charts, graphs, and KPI dashboards with libraries such as Victory Native, react-native-svg, react-native-gifted-charts, or Skia-based charting.
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Experience managing app releases end to end through EAS - signing, store submissions, staged rollouts, OTA updates - and writing automated tests (Jest, React Native Testing Library, Detox, or similar).
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Familiarity with push notification services (FCM, APNs), analytics, and crash reporting tooling in production apps.
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Strong grasp of secure coding and application security fundamentals - OWASP Top 10 (web and mobile), secure token and credential storage, certificate pinning awareness, input validation, and privacy-conscious data handling.
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Proficient with Git-based source control - branching strategies, pull requests, merge conflict resolution, and disciplined code review as everyday practice.
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Added advantage: broader CI/CD automation (Azure DevOps pipelines, Fastlane, or App Center) around the EAS workflow.
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Added advantage: native build tooling (Xcode, Android Studio, Gradle), Expo config plugins and prebuild, and bridging native modules when the JavaScript layer is not enough.
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Added advantage: back-end development experience with .NET / C#, Azure services (Functions, App Service, Notification Hubs), and SQL Server.
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Added advantage: Python for scripting and automation; SharePoint or Microsoft 365 integration experience.
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Added advantage: experience implementing AI APIs within applications - Azure OpenAI or similar - for chat, search, or intelligent in-app experiences.
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Experience in the AEC (Architecture, Engineering, and Construction) or professional services sector is advantageous.
