Freelance iOS Development · Funded Startups

Senior Freelance iOS Developer
for Funded Startups

Fixed-scope iOS development for seed and Series A teams. Ship a production iOS app in 4–5 weeks, add on-device AI in 3–4 weeks, or get a senior architecture review in 5 days. No hourly billing. No retainers.

4–5 weeks
MVP Sprint delivery time: 5 days
Architecture Audit turnaround: 100%
User data stays on-device: Swift 6
Strict concurrency, production-ready

Start a Project →View Case Studies

By Ehsan Azish · 3NSOFTS · Updated May 2026

Who This Is For

3NSOFTS works exclusively with funded startup teams — typically seed to Series A — that need a senior iOS engineer to ship production code on a fixed timeline. The engagements are designed for teams that:

Have funding and need to ship an iOS app before the next fundraise or demo day
Need production-quality code, not a prototype that requires a rewrite in six months
Want direct access to a senior engineer, not an agency project manager
Have a defined product spec and are ready to build — not still in discovery
Need predictable cost and timeline with no hourly billing ambiguity
Are building AI-native iOS features and need on-device expertise (Core ML, Apple Foundation Models)

Not the right fit: idea-stage without a defined spec, teams needing Android or cross-platform, projects requiring full-time embedded engineering for 6+ months.

Fixed-Scope Engagements

Three productized services. Each has a defined scope, published timeline, and fixed price — agreed before work begins.

iOS Architecture Audit

5 business days · From $1,500

Book an Audit →

You have an existing app or a detailed spec and need a senior technical review before scaling.

Full architecture assessment
Data layer and sync strategy review
AI readiness evaluation
App Store compliance risk check
Prioritized technical roadmap
90-min live walkthrough

iOS MVP Sprint

4–5 weeks · From $9,500

Start Your Sprint →

You have seed or pre-seed funding and need a production iOS app to show investors and early users.

Production SwiftUI codebase
Core feature implementation
CloudKit or SwiftData persistence
Sign in with Apple
CI-ready project structure
App Store–ready build + TestFlight

On-Device AI Integration

3–4 weeks · From $6,500

Integrate AI →

You have a working iOS app and want to add AI features that run privately on-device, with no cloud dependency.

Core ML or Foundation Models integration
On-device inference pipeline
Privacy-first architecture
Offline-capable AI features
Rollout controls and feature flags
Performance benchmarks

Full service details and pricing: work-with-me →

Why Funded Startups Choose 3NSOFTS

Fixed scope. Fixed price.

Every engagement has a published timeline, deliverables list, and price — agreed before work begins. No hourly billing. No change-order surprises at invoice time.

Senior engineer, not a team relay.

You communicate directly with the engineer writing your code. No project manager layer, no handoffs between junior and senior developers, no lost context across standups.

Apple platform specialist.

Swift 6, SwiftUI, CloudKit, Core ML, and Apple Foundation Models — exclusively. The architecture patterns used are the ones that scale, not the ones that look impressive in a demo.

Production code, not a prototype.

The iOS MVP Sprint outputs a codebase your next engineer can extend without a rewrite. Architecture decisions are documented. State management, routing, and service isolation are correct from day one.

Startup-paced delivery.

Weekly async updates, a shared project tracker, and a final walkthrough session. The sprint is structured to keep your team informed without consuming their time.

Post-delivery support.

30 days of async Q&A support after every engagement. Questions about extending the codebase, adding a feature, or handling App Review feedback are answered within one business day.

Technology Stack

All projects use the Apple-native stack. No cross-platform frameworks, no web views, no dependencies that create long-term maintenance risk.

Language

Swift 6
Strict concurrency
Swift Macros

UI Layer

SwiftUI
NavigationStack
Async image loading

Data & Sync

SwiftData
CloudKit
Core Data

AI & ML

Core ML
Apple Foundation Models
Create ML

Architecture

@Observable
Swift Actors
TCA (when warranted)

Testing & CI

Swift Testing
Xcode Cloud
TestFlight

How a Sprint Works

01
Apply and scope
Fill out the intake form describing your app, stack, and timeline. You receive a scope document with deliverables, timeline, and fixed price within 2 business days.
02
Confirm and start
Sign the scope document and pay the first milestone. Work begins the following Monday. You get access to the shared project tracker and a private async channel.
03
Build in two-week cycles
The MVP Sprint runs in two focused build cycles. Each cycle ends with a working build pushed to TestFlight and an async progress update covering what shipped, what's next, and any decisions needed from your side.
04
Final delivery and walkthrough
At sprint end: production-ready codebase on your repository, App Store–ready build, architecture documentation, and a 60-minute live walkthrough covering every part of the system.
05
30-day async support
One month of async support after delivery. Questions about extending the codebase, handling App Review, or planning the next feature set — answered within one business day.

Frequently Asked Questions

How quickly can a funded startup get a production iOS app?

The iOS MVP Sprint delivers a TestFlight-ready, production-grade iOS app in 4–5 weeks. The output is production code with architecture that supports new features without a rewrite — not a throwaway prototype.

What does a freelance iOS developer cost for a startup?

Fixed-scope pricing: the iOS Architecture Audit starts at $1,500, the iOS MVP Sprint starts at $9,500, and On-Device AI Integration starts at $6,500. Your budget is set before work begins — no hourly billing surprises.

Why hire a freelance iOS developer instead of an agency for a startup?

A senior specialist gives you direct access to the engineer writing your code. Faster decisions, tighter feedback loops, and code that scales without a rewrite at Series A. Fixed-scope also means complete cost visibility before signing.

Does 3NSOFTS work with idea-stage or pre-launch startups?

Yes, if the product problem is defined and you're ready to build. The core use case, target user, and primary data model must be decided before the sprint begins. The sprint converts a well-defined spec into production iOS code — it doesn't do product discovery.

What iOS technologies are used in the MVP sprint?

Swift 6, SwiftUI, Swift Concurrency, CloudKit or SwiftData for persistence, Sign in with Apple, and Xcode Cloud for CI. On-device AI features use Core ML and Apple Foundation Models.

How is 3NSOFTS different from freelance platforms like Toptal or Upwork?

Freelance marketplaces offer hourly billing with variable quality. 3NSOFTS offers fixed-scope, fixed-price engagements with a published delivery timeline — you know exactly what you get and what you pay before the project starts.

Related Resources

SwiftUI MVP Development

Architecture, cost planning, and delivery strategy for iOS MVPs.

Services Overview

All three fixed-scope engagements with full deliverables and pricing.

Case Studies

Real projects: timelines, decisions, and outcomes.

iOS Developer Comparison

How 3NSOFTS compares to freelance platforms and agencies.

iOS AI Architecture

On-device AI architecture patterns for production iOS apps.

Fixed-Price iOS Development Guide

Why fixed-scope works better than hourly for startup iOS projects.

Ready to Ship Your iOS App?

Fill out the intake form — it takes 5 minutes. You'll receive a fixed-scope proposal with timeline, deliverables, and price within 2 business days.

Apply for a Sprint →Ask a Question First

Not sure which engagement fits? The Architecture Audit ($1,500, 5 days) is the lowest-risk way to start.