Senior Backend Software Engineer

Cascade AI

Senior Backend Engineer designing and managing backend systems for Cascade's AI-driven HR solutions. Collaborating with cross-functional teams to deliver scalable and reliable backend engineering solutions.

Posted 6/13/2026full-timeBellevue • Washington • 🇺🇸 United StatesSenior💰 $130,000 - $170,000 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDockerGoogle Cloud PlatformKubernetesMongoDBNoSQLPostgresPythonServiceNowSQL

About the role

Key responsibilities & impact

Design and own the architecture of backend services that power Cascade's AI agent platform, making decisions on system boundaries, data flow, and scalability.
Lead technical design for complex features — write design docs, drive architecture reviews, and ensure alignment across teams.
Build and evolve APIs that support conversational interactions, task execution, and long-running enterprise workflows.
Design data models and storage layers across relational and NoSQL databases (PostgreSQL, Firestore), optimizing for performance and reliability at scale.
Own production reliability for your systems — define SLOs, build monitoring and alerting, and lead incident response.
Develop and iterate on LLM orchestration logic in Python, including prompt execution, tool calling, state management, and evaluation frameworks.
Build ingestion and retrieval pipelines for HR documents and structured data used by AI agents.
Design and improve evaluation and testing frameworks to measure and increase agent accuracy and reliability.
Integrate deeply with enterprise systems such as HRIS platforms (Workday, ADP, UKG), ticketing tools (ServiceNow, Jira), and communication tools (Slack, Microsoft Teams).
Implement authentication, authorization, and access controls to meet enterprise security and compliance requirements.
Mentor junior and mid-level engineers through code reviews, pairing, and technical guidance.
Identify and drive improvements to engineering processes, tooling, and best practices across the team.
Collaborate with product, frontend, and customer teams to shape roadmap priorities and ship end-to-end features.

Requirements

What you’ll need

5-8+ years of professional backend engineering experience in production environments.
Strong proficiency in Python, including experience building backend services and data-intensive systems.
Proven experience designing and building entire backend services end-to-end, with a track record of making sound architecture decisions.
Solid understanding of data modeling and databases, including SQL (PostgreSQL) and NoSQL systems (e.g., Firestore or MongoDB).
Experience with cloud infrastructure (GCP, Azure, or AWS), including service deployment, networking, and cost optimization.
Familiarity with containerization and deployment workflows (Docker; Kubernetes strongly preferred).
Strong software engineering fundamentals: system design, testing, performance, and reliability.
Experience leading technical projects — scoping work, breaking down ambiguity, coordinating across teams, and delivering on time.
Demonstrated ability to mentor other engineers and raise the quality bar for a team.
Comfort operating with ambiguity and evolving requirements in a fast-paced environment.

Benefits

Comp & perks

Offers Equity
Bonuses
OC
Professional Development
Paid time off

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonAPI developmentdata modelingPostgreSQLFirestoreNoSQLcloud infrastructureDockerKubernetesLLM orchestration

Soft Skills

mentoringtechnical designcollaborationleadershipproblem-solvingcommunicationprocess improvementadaptabilityproject managementteam coordination