Principal Software Development Engineer, Full Stack

WillHire

Principal/Sr Full Stack Software Engineer developing and integrating AI agents into HR and Finance workflows for Workday. Collaborating with cross-functional teams to deliver meaningful software solutions.

Posted 4/17/2026full-timeSeattle • California, Washington • 🇺🇸 United StatesSenior💰 $163,800 - $245,800 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDjangoDockerFlaskJavaKubernetesPostgresPythonReactTypeScript

About the role

Key responsibilities & impact

Build and deliver full stack features that power AI agents embedded in HR and Financial workflows
Own services and experiences from development through production—you build it, you run it
Collaborate in an iterative, team-first environment that values strong engineering practices and continuous learning
Share knowledge, mentor teammates, and help raise the technical bar across the pod

Requirements

What you’ll need

12+ years of experience in software engineering
7+ years experience with a web development framework (Python preferred: Flask, Django, or FastAPI)
7+ years of experience with React and Typescript for Front End / Full stack development
7+ years with a Relational DB (PostgreSQL preferred)
Bachelor's degree in a computer related field or equivalent work experience
Experience building and operating SaaS products in cloud environments (AWS preferred)
Familiarity with the tradeoffs and architecture of modern distributed systems
Knowledge of software development best practices (DevOps, CI/CD, automated testing, observability)
Hands-on experience with containerization technologies (Docker, Kubernetes)
Exposure to additional programming languages like Java (backend) and TypeScript (frontend/fullstack) is a plus
Proven success working within fast-paced, agile environments and cross-functional teams

Benefits

Comp & perks

Workday Bonus Plan
Role-specific commission/bonus
Annual refresh stock grants
Health insurance
401(k) matching
Flexible work arrangements
Professional development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonFlaskDjangoFastAPIReactTypescriptPostgreSQLSaaSDockerKubernetes

Soft Skills

collaborationmentoringcontinuous learningteamworkcommunication

Certifications

Bachelor's degree in computer related field