Senior Software Engineer, Swift - macOS

Sunnyvale, California, United States Software and Services

At Apple, new ideas have a way of becoming excellent products, services, and customer experiences very quickly. Bring passion and dedication to your job and there's no telling what you could accomplish. Claris, an Apple company, is a place where extraordinary people gather to do their best work. Just be ready to dream big. The workplace today is flooded by applications, but organizations struggle to integrate and automate processes that run across them.

At Claris, we are building a better way for the world's 500 million knowledge workers to do their jobs better. We accomplish this by empowering them to automate their processes and integrate data across all their applications in a matter of days thanks to an easy-to-use visual platform. If you're passionate about building intelligent software that runs where customer data lives, thrive on hard systems problems, and want to shape how organizations make sense of their data, this is your team.

You'll build the native macOS platform that puts AI-powered insights directly into the hands of knowledge workers.

We are looking for a senior Swift engineer to join a small, focused team building an on-device AI pipeline for macOS. This is a systems-level role where you'll work across native AI runtime and orchestration, platform integrations and enterprise connectors, deterministic data execution, or adaptive macOS UI depending on your strengths and interests. The architecture is a multi-stage pipeline with layered Swift Package Manager targets, strict dependency boundaries, and no shortcuts.

You'll work on problems that matter. The software you build protects customer data, keeps critical systems running, and delivers tools that organizations from schools to hospitals trust every day. We're looking for someone who ships real macOS desktop software, takes ownership of their technical surface, and cares about the people who use what we build. This is not a chatbot — it's a structured, multi-stage pipeline that turns natural language into verified, traceable results.

• 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 — Layer 0 (Foundation) through Layer 2 (Orchestration) to App.
• 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. Layer ephemera ls graph staging where relationship-heavy queries require it.
• Develop the macOS adaptive UI using SwiftUI with App Kit 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. Participate in evidence surface development (golden question validation, accuracy benchmarks).
• Ensure all shared mutable state uses actors or Sendable value types with correct isolation annotations. Maintain Swift 6 strict concurrency compliance.
• Collaborate closely with a small senior team (4-5 engineers) where each person owns their surface. Participate in sprint planning, architecture reviews, and release readiness.
• Work within a structured, AI-assisted development workflow using Xcode and modern coding intelligence tools for repo-scale operations and project conventions.

• 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)
• Ex…