Android developer required for examination app

We are looking for an experienced Android developer to build a secure examination app used by students with disabilities under formal exam conditions. The app will run on a specific device: Samsung Galaxy Tab A9+, targeting the current major Android version, with future version support considered as the platform evolves. Devices may be either:

• School-managed tablets (where true Android kiosk / lock task mode may be available), or
• Consumer tablets, where screen pinning and device PINs are used instead.

This is an ongoing product, not a one-off build. We are looking for someone who can deliver the initial release and continue development over time. ⸻ Core skills required

• Strong native Android development experience (Kotlin preferred)
• Delivered complete Android apps end-to-end, including Google Play Store release
• Experience with kiosk mode / lock task mode and screen pinning
• Experience rendering and annotating PDFs
• Experience handling encrypted local data
• Comfortable building accessibility-focused user interfaces

⸻ App overview Modes and flow Examiner Mode

• App launches in Examiner Mode
• Examiner uploads a PDF exam paper via USB
• Examiner switches the device into Student Mode

Student Mode

• Locked-down, kiosk-style mode
• If the device supports true kiosk / lock task mode, it should be used
• If not, the app must fall back to Android screen pinning
• Examiner will be given instructions for any required manual device setup

Student flow 1. Welcome screen 2. Student completes a short form (approx. 5 fields: name, student ID, etc.) 3. Student taps Start exam 4. Exam is completed 5. Examiner ends the session There is one student per device per session. ⸻ Exam interface

• Display the uploaded PDF exam paper
• Student can add:
• Free-positioned text boxes over the PDF
• Each text box is tagged with a question number
• Text entered via:
• On-screen keyboard
• Push-to-talk speech-to-text using Google Cloud Speech-to-Text API
• Drawing/sketch input (finger and stylus supported)
• Optional text labels on drawings
• Layered (“onion skin”) approach
• Original PDF visible beneath answers
• Adjustable opacity for the answer layer
• Anchoring requirement
• All annotations must remain correctly positioned relative to the PDF page when zooming or navigating pages
• All inputs must be editable at any point during the exam

Undo/redo history is not required. ⸻ Autosave and recovery

• Automatic local autosave every 1 minute
• If the app crashes or is restarted, the examiner can:
• Relaunch the app
• Select and restore the most recent autosave

⸻ Export and printing (direct from device) At the end of an exam, the examiner can optionally:

• Print or export:
• PDF 1: Original exam paper beneath answers (e.g. original at ~30% opacity)
• PDF 2: Answer layer only
• All exported/printed outputs must include student details (e.g. filename and/or document header)

Accessibility requirements The app must include:

• Font scaling
• Dyslexia-friendly font option
• High-contrast mode

Predictive text and suggestions should be disabled as far as Android allows within the app. ⸻ Security and data handling

• All locally stored exam data must be encrypted at rest
• Autosaves must also be encrypted
• Internet access control will be handled outside this project
• The app will use the internet only for Google Cloud Speech-to-Text

⸻ Out of scope (for this phase)

• Exam timers or enforced time limits
• Live examiner monitoring during the exam
• Formal exam board or regulatory compliance work (to be addressed later)

⸻ Deliverables

• Working Android app for Samsung Galaxy Tab A9+
• Source code
• Release build
• Support with Google Play Store submission (private/internal track acceptable)
• Basic documentation covering:
• Examiner workflow
• Kiosk vs screen-pinning behaviour
• Autosave and recovery process

⸻ To apply, please include

• Examples of Android apps you have shipped (PDF, kiosk, education or accessibility apps preferred)
• A short explanation of how you would approach:
• PDF rendering and anchored annotations
• Drawing and text layers
• Autosave and encryption
• Kiosk mode with fallback to screen pinning
• Your availability for an ongoing engagement
• Any questions about the project
• Cost estimate

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