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.

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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

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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.

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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.

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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

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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.

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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

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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)

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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

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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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