Android app

We are seeking an experienced Android developer to expand the scoring system and UI architecture of a professional shooting-range control application.

This is not a beginner project. The app interfaces with networked hardware targets, supports drill logic, and synchronizes with a web API. We need a developer who can extend existing functionality cleanly and architecturally — not patch code.

Current Environment

• Android tablet controller app (Java)
• Fragmentbased UI architecture
• REST API (Laravel backend)
• Local persistence (SQLite equivalent)
• Deltabased synchronization with updated_at / deleted_at timestamps

Hardware integration layer (BLE / mesh handled separately) is already COMPLETED.

Scope of Work

We need to:

Design and implement new scoring view fragments

Expand scoring logic (hit detection, penalties, timing, drill-based scoring modes)

Support multiple scoring models (e.g., time-based, point-based, hybrid)

Ensure scoring state syncs correctly with:

Local storage

Web API

Offline-first architecture

Improve fragment lifecycle handling and state restoration

Maintain clean separation between:

UI layer

Scoring engine logic

Data/sync layer

Ideal Candidate

Strong Android architecture experience (MVVM or similar)

Deep understanding of Fragment lifecycle and state management

Experience with offline-first sync systems

Comfortable working with an existing codebase

Able to write clean, maintainable, production-quality code

Bonus

Experience with real-time systems or training/simulation software

Deliverables

New scoring fragments fully integrated

Daily pushes to git of your work

Working off a ticket system (Redmine)

Clean scoring engine extension (modular + testable)

Proper API sync handling

Please include:

Examples of complex Android apps you've worked on

Experience with fragment-heavy applications

Experience with sync/state-heavy apps

This is an ongoing project with potential for long-term work.

Contract duration of more than 6 months. with 40 hours per week.

Mandatory skills:

Android App Development, Java, Android, SQLite