Principal Software Engineer, Agentic Engineering

Fifth Third Bank • Detroit, MI

1d • Hybrid

About The Position

We are looking for a Principal Software Engineer to join our Agentic Engineering team. You will build a platform where specialized AI agents compose across technical domains — knowledge and policy, change/ITSM, network security, cloud, and source code. Instead of an engineer manually stitching together answers from a half-dozen tools, agents coordinate with each other to do the work. This is a hands-on technical leadership role that requires deep proficiency in Python and TypeScript, a track record of designing systems that operate reliably at organizational scale, and the ability to set standards that shape how enforcement is practiced across teams.

Requirements

• 8–12+ years of software engineering experience with deep proficiency in Python and TypeScript.
• A track record of technically driving teams of engineers — mentoring, setting standards, and shipping complex systems together.
• Experience building agentic or multi-step automated systems — tool orchestration, LLM reasoning loops, or agent frameworks.
• The ability to set architectural direction and reusable patterns that other engineers adopt.
• Experience designing for non-deterministic behavior, edge cases, and failure — and building the testing and observability to catch them.

Nice To Haves

• Experience building LLM safety, evaluation, or governance systems end-to-end.
• Retrieval / hybrid search over enterprise knowledge.
• Background in platform engineering or developer tooling at enterprise scale.
• Terraform and infrastructure-as-code experience.
• Open-source contributions on public GitHub.

Responsibilities

• Lead and grow a team of software engineers building production agents — setting direction, reviewing designs, mentoring, and unblocking.
• Define the team's engineering standards — agent patterns, tool integration, testing, code quality, observability, and review practices that hold the bar high.
• Architect the agent platform — the shared services and protocols (e.g., agent-to-agent messaging, tool servers) that let agents discover and compose with one another reliably.
• Stay hands-on — write code, prototype hard problems, and pair with engineers on the toughest parts of the system.
• Own the quality and safety of agent behavior — design how the team verifies that agents stay accurate, cost-efficient, and within guardrails over time.
• Translate vision into a roadmap — break an ambitious platform vision into shippable increments the team can execute and be proud of.
• Represent the team to leadership — communicate architecture, trade-offs, and progress clearly to engineering and product leadership.

Benefits

• Comprehensive benefits
• Differentiated compensation offerings
• Incentive compensation plan
• Extensive benefits programs designed to support the individual needs of our employees and their families, encompassing physical, financial, emotional and social well-being.

What This Job Offers

• Job Type: Full-time
• Career Level: Principal
• Education Level: No Education Listed