Principal Software Engineer- Eng Seattle,WA,United States Software & Product Development

UKG; Seattle, Northern (WA, KY); Hybrid; USD 150,000 - 210,000; Full time

Job summary

UKG seeks a Senior Platform Architect to define and evolve the architecture for HCM foundation services supporting HR, Recruiting, Benefits, Pay, and other teams. You will drive decisions across shared services, APIs, data models, and platform libraries to ensure high availability, security, and compliance.

You will lead reviews, set standards, and collaborate with multiple product teams to enable scalable, observable systems using .NET Core and event-driven patterns.

Qualifications

• 10+ years of professional software engineering experience, including senior staff or principal level.
• Experience designing and building distributed systems using .NET Core and modern backend architectures.
• Experience leading cross-team architectural initiatives with significant business impact.
• Proven ability to set architectural standards and drive adoption across multiple teams.
• Familiarity with AI-assisted engineering or partnering with AI/Data teams to productionize capabilities.
• Experience with highly regulated enterprise systems (HR/ payroll/ benefits) and data privacy.

Responsibilities

• Define and evolve architecture for HCM foundation services across HR, Recruiting, Benefits, Pay, and other teams.
• Drive architectural decisions across shared services, APIs, data access, platform libraries, build systems, and integrations.
• Ensure high availability, correctness, scalability, observability, security, auditability, and compliance.
• Lead architecture and design reviews; set standards for system design, code quality, and operational readiness.
• Build and evolve reusable platform capabilities and secure APIs; enable cross-team adoption.

Skills

Distributed systems

Architectural leadership

NET Core

API design

Event-driven architecture

Angular

Tools

Angular

Job description

• Define and evolve the architecture for HCM foundation services that support HR, Recruiting, Benefits, Pay, and other consuming teams.
• Drive architectural decisions across shared services, APIs, data access patterns, platform libraries, build systems, and integration points.
• Ensure systems are designed for high availability, correctness, scalability, observability, security, auditability, and regulatory compliance.
• Lead architecture and design reviews; set standards for system design, code quality, operational readiness, and cross-team adoption.

Platform & Foundation Services

• Build and evolve reusable platform capabilities, service contracts, and libraries that reduce duplicated work across HCM product teams.
• Design data models, persistence strategies, and service-layer patterns across relational and NoSQL systems where appropriate.
• Create secure, reliable APIs and event-driven patterns that allow domain teams to consume HCM foundation capabilities consistently.
• Support modernization efforts such as service decomposition, .NET Core enablement, build modernization, and migration from legacy platform dependencies.

10+ years of professional software engineering experience, including 3+ years operating at a senior, staff, or principal level. Deep experience designing and building distributed systems using .NET Core and modern backend architectures. Experience building and supporting large-scale, business-critical platform services, shared APIs, or foundational systems consumed by multiple product teams. Track record of influencing technical direction across multiple teams or organizations. Demonstrated ability to set architectural standards and drive adoption. Strong problem-solving skills with the ability to break ambiguous problems into clear technical designs. Experience applying AI-assisted engineering practices or partnering with AI, ML, or data teams to productionize intelligent capabilities. Proven ability to lead highly complex, cross-functional initiatives with significant business impact. Experience with HCM, workforce management, payroll, benefits, recruiting, or other highly regulated enterprise systems. Familiarity with AI concepts such as anomaly detection, rule augmentation, model inference pipelines, or decision-support systems. Experience designing systems with strict requirements for compliance, auditability, and data privacy. Front-end experience supporting or integrating with Angular applications. Background in event-driven, batch, hybrid processing, or service-oriented platform architectures. Track record of shaping long-term shared platform architecture across multiple teams, domains, or product lines. Experience modernizing legacy systems or leading large-scale technical transformations.