Lead Software Engineer, Agentic Engineering

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Make your career a Fifth Third better®

Fifth Third Bank provides a variety of career development opportunities to help you build and sustain a strong future. We are proud of our workforce and of our employees' desire to stretch, learn and grow.

We are looking for a Lead Software Engineer to join our Agentic Engineering team. You will help 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 role that requires strong proficiency in Python and TypeScript, a track record of shipping systems that run reliably in production, and the judgment to set the technical bar for the engineers around you. As a Lead, you own the execution of a meaningful part of the platform — driving designs, mentoring engineers, and turning direction into working software.

 What You'll Do

• Lead the technical delivery of a workstream — own the design and implementation of production agents and the services they depend on, from prototype to production.
• Set and uphold engineering standards — agent patterns, tool integration, testing, code quality, and observability practices that hold the bar high on your part of the platform.
• Build the agent platform hands-on — implement the shared services and protocols (e.g., agent-to-agent messaging, tool servers) that let agents discover and compose with one another reliably.
• Stay deep in the code — you spend most of your time writing code, prototyping hard problems, and pairing with engineers on the toughest parts of the system.
• Help ensure agents behave — build the testing, evaluation, and observability that verify agents stay accurate, cost-efficient, and within guardrails over time.
• Mentor and review — guide engineers through design reviews and code reviews, and unblock them on hard technical problems.
• Break work into shippable increments — translate architectural direction into a plan you and the engineers around you can execute and be proud of.

What Differentiates This Role
 

This role asks you to build autonomous systems that reason — agents that make decisions, call tools, and message one another.

• You're implementing how agents get built — the shared patterns, base abstractions, and "paved road" that make new agents fast to build and safe to run.
• You're responsible for knowing agents are behaving — observability, evaluation, and continuous checks, not a one-time test.
• You're working in non-deterministic systems — where correctness, cost, and safety all have to be designed in, not bolted on.

 What You Will Bring

• 6+ years of software engineering experience with strong proficiency in Python and/or TypeScript.
• A track record of leading technical delivery — mentoring engineers, setting standards, and shipping complex systems.
• Experience building agentic or multi-step automated systems — tool orchestration, LLM reasoning loops, or agent frameworks.
• The ability to establish reusable patterns and technical direction 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 Have

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

Work Environment

Hybrid work. Candidates must be located in the Farmington Hills / Metro Detroit, Michigan area. No remote candidates.

Position not available for immigration sponsorship.

At Fifth Third, we understand the importance of recognizing our employees for the role they play in improving the lives of our customers, communities and each other. Our Total Rewards include comprehensive benefits and differentiated compensation offerings to give each employee the opportunity to be their best every day.

The base salary for this position is reflective of the range of salary levels for all roles within this pay grade across the U.S. Individual salaries within this range will vary based on factors such as role, relevant skillset, relevant experience, education and geographic location. In addition to the base salary, this role is eligible to participate in an incentive compensation plan, with any such payment based upon company, line of business and/or individual performance.

Our extensive benefits programs are designed to support the individual needs of our employees and their families, encompassing physical, financial, emotional and social well-being. You can learn more about those programs on our 53.com Careers page at: https://www.53.com/content/fifth-third/en/careers/benefits.html or by consulting with your talent acquisition partner. 

Attention search firms and staffing agencies: do not submit unsolicited resumes for this posting.  Fifth Third does not accept resumes from any agency that does not have an active agreement with Fifth Third.  Any unsolicited resumes – no matter how they are submitted – will be considered the property of Fifth Third and Fifth Third will not be responsible for any associated fee.

Fifth Third Bank, National Association is proud to have an engaged and inclusive culture and to promote and ensure equal employment opportunity in all employment decisions regardless of race, color, gender, national origin, religion, age, disability, sexual orientation, gender identity, military status, veteran status or any other legally protected status.