Senior Swift Engineer — On-Device AI for macOS

Apple Inc.; Sunnyvale (CA); On-site; USD 184,700 - 277,600; Full time

Benefits offered by this job

Stock program eligibility

Relocation assistance

Education reimbursement

Comprehensive medical and dental

Retirement benefits

Discounted products and services

Employee stock purchase plan

Job summary

Apple Inc. in Sunnyvale, CA, seeks a senior Swift engineer to join a focused team building an on-device AI pipeline for macOS. This is a systems-level role spanning runtime/orchestration, platform integrations, deterministic data execution, and adaptive UI.

You will ship native macOS desktop software, own technical surfaces, and ensure data provenance with strict concurrency in a small senior team. The role emphasizes ownership and collaboration.

Qualifications

• B.S. in Computer Science or equivalent software engineering experience.
• 7-10+ years of software engineering experience with Swift.
• Experience shipping macOS desktop software (not iOS-only).
• Strong understanding of Swift concurrency (actors, async/await, Sendable, structured concurrency).
• Experience working within layered, modular architectures with strict dependency management.

Responsibilities

• Own one or more technical surfaces within the native AI pipeline: runtime/orchestration, platform/integrations, deterministic execution, or adaptive UI.
• Design and implement production Swift code within a layered SPM architecture (20+ targets) with strict dependency boundaries.
• Build and maintain on-device AI orchestration using Foundation Models and MLX, including structured intent extraction, sufficiency gate routing, tool calling, context shaping, and synthesis quality.
• Implement and harden platform integrations — MCP client connections, enterprise connector data access, entitlements, sandboxing, identity, and persistence boundaries.
• Build deterministic execution pathways — joins, aggregations, rankings, filters — with full data provenance and traceability.
• Develop the macOS adaptive UI using SwiftUI with AppKit interop — desktop windowing, keyboard-first workflows, streaming content updates, canvas state systems, and accessibility.
• Write and maintain automated tests using XCTest and Swift Testing frameworks.
• Ensure all shared mutable state uses actors or Sendable value types with correct isolation annotations.
• Collaborate closely with a small senior team (4-5 engineers) where each person owns their surface.
• Work within a structured, AI-assisted development workflow using Xcode and modern coding intelligence tools.

Skills

Swift programming

Swift concurrency

macOS desktop

Modular architectures

Team collaboration

Foundation Models

MCP integration

REST APIs

Deterministic data systems

SwiftUI AppKit

SPM multi-target

macOS services

Actor concurrency

CI/CD

Git workflows

Education

B.S. in Computer Science

Tools

Xcode

AppKit

Job description

Apple Inc. in Sunnyvale, CA, seeks a senior Swift engineer to join a focused team building an on-device AI pipeline for macOS. This is a systems-level role spanning runtime/orchestration, platform integrations, deterministic data execution, and adaptive UI.

You will ship native macOS desktop software, own technical surfaces, and ensure data provenance with strict concurrency in a small senior team. The role emphasizes ownership and collaboration.