Senior Swift Engineer – macOS AI Platform

Senior Swift Engineer – macOS AI Platform (Contract)

Location: Fully Remote
Duration: 3-month W2 contract (with potential extension)
Pay Rate: $100–$123/hour (depending on experience)
Company: Russell Tobin (supporting a leading enterprise technology client)

 

About the Role

Russell Tobin is supporting a cutting-edge technology client building a native macOS application that delivers AI-powered data insights for business users.

This is a systems-level engineering role working across AI runtime, platform integrations, deterministic data execution, and adaptive macOS UI. The product is built on a multi-stage pipeline architecture that transforms natural language into verified, traceable outputs.

You’ll join a small, senior team where engineers own meaningful technical surfaces and ship high-quality macOS desktop software.

 

What You’ll Do

• Own key components within a native AI pipeline: runtime/orchestration, platform integrations, deterministic execution, or UI
• Design and build production-grade Swift code within a layered Swift Package Manager (SPM) architecture (20+ modules)
• Develop AI orchestration systems including structured outputs, routing, tool calling, and context management
• Build platform integrations (enterprise data access, identity, sandboxing, connectors)
• Implement deterministic data execution (joins, aggregations, ranking, filtering) with traceability
• Create adaptive macOS UI using SwiftUI with AppKit interop (desktop workflows, streaming updates, accessibility)
• Write and maintain automated tests using XCTest and Swift Testing
• Apply Swift 6 concurrency best practices (actors, Sendable, async/await)

 

Required Qualifications

• 5+ years of professional software engineering experience with Swift
• Proven experience shipping native macOS desktop applications (not iOS-only)
• Strong knowledge of Swift concurrency (actors, async/await, structured concurrency)
• Experience with modular SPM architectures and strict dependency management
• Familiarity with protocol-oriented design and dependency injection
• Experience working with strict linting, pre-commit hooks, and CI workflows

 

Preferred Experience

• AI/LLM integration (structured outputs, tool calling, streaming inference)
• ML inference frameworks and model orchestration
• Prompt design, token management, and multi-stage pipelines
• Evaluation of non-deterministic AI outputs
• macOS platform services (sandboxing, entitlements, code signing, packaging)
• Data processing in Swift (TabularData, query systems, ranking/filtering)
• SwiftUI + AppKit production apps with complex desktop UX patterns
• Performance optimization and accessibility best practices

Russell Tobin offers eligible employee’s comprehensive healthcare coverage (medical, dental, and vision plans), supplemental coverage (accident insurance, critical illness insurance and hospital indemnity), 401(k)-retirement savings, life & disability insurance, an employee assistance program, legal support, auto, home insurance, pet insurance and employee discounts with preferred vendors.

Equal Employment Opportunity
Russell Tobin is an equal opportunity employer. We do not discriminate on the basis of the race, religious creed, color, national origin, ancestry, physical disability, mental disability, reproductive health decision making, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, age, sexual orientation, veteran or military status, or any other characteristic protected by applicable federal, state, or local law.
 
Fair Chance Employment
Russell Tobin is a Fair Chance employer. We consider all qualified applicants, including those with criminal histories, in a manner consistent with applicable state and local Fair Chance laws and ordinances, including, the California Fair Chance Act and all applicable local Fair Chance ordinances.
 
Accommodations
We are committed to providing reasonable accommodations to applicants and employees with disabilities. If you require a reasonable accommodation to participate in the application or interview process, or to perform the essential functions of this role, please contact us. 
 
Only applicable for San Francisco Candidates: Under the San Francisco Lactation in the Workplace Ordinance, we will provide written notice of lactation accommodation rights, and this notice will automatically be given upon hiring, any inquiry of parental leave or lactation accommodation.
 
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