I’m looking for an experienced iOS developer to complete a partially built navigation app.
The Mapbox routing layer is already integrated and functional. This phase focuses on finalizing the navigation experience and voice instruction system, not building from scratch.
Project Overview
This is an audio-focused navigation app where routing events trigger custom voice output. The core requirement is to ensure the app functions as a complete, reliable GPS experience, with additional audio features layered on top.
This is not a UI-heavy project. The work is centered around navigation accuracy, maneuver handling, audio timing and sequencing, and voice instruction assembly.
Current State
iOS app written in Swift
Mapbox Directions API integrated
Navigation routing working
Basic audio trigger system in place
TestFlight build available
Scope of Work (This Phase)
The goal is to complete a fully functional navigation experience with correct voice instructions.
Core Requirements
Ensure navigation behaves like a standard GPS app
Maneuvers update correctly during navigation
Camera follows user properly
Rerouting works reliably
Background navigation functions
Voice & Instruction Requirements
Navigation instructions must be complete and natural, including street names, exit numbers, and variable distances
Integrate dynamic voice generation for elements that cannot be pre-recorded such as street names, exits, and uncommon distance values
I will provide the API key and Voice/Character ID
Use pre-recorded audio where applicable and dynamic voice generation only where necessary
Audio Behavior
Ensure proper timing of instructions
No overlapping audio
Correct sequencing of navigation events
Important Notes
This is a continuation project, not a fresh build
The Mapbox integration is already complete
The focus is finishing and refining, not rebuilding
The app must function as a complete navigation system first before any additional audio features are layered
Ideal Candidate
Strong iOS / Swift experience
Hands-on experience with Mapbox Directions API
Experience working with navigation maneuvers and route steps
Experience with audio playback and timing logic
Experience with TTS or voice APIs is a plus
Timeline & Expectations
Short-term engagement
Clearly defined scope
Looking for someone who can execute efficiently without over-engineering
To Apply
Please include your relevant Mapbox or navigation experience, any work involving audio or voice systems, and an estimated number of hours to complete this scope after review