Fifth Third Bancorp

Principal Software Engineer, Agentic Engineering

Fifth Third Bancorp$130K — $155K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 8-12+ years of software engineering experience with strong expertise in Python and TypeScript.
  • Proven experience in architecting production systems across multiple services and teams.
  • History of establishing enforcement and validation standards utilized organization-wide.
  • Expertise in anticipating adversarial inputs and designing systems for edge case failures.
  • Ability to set architectural direction and create reusable patterns for teams.
  • Experience mentoring senior engineers on system design and defensive architecture.
  • Effective communicator, capable of presenting technical strategy to leadership.

Responsibilities

  • Architect guardrail and enforcement systems across services and domains.
  • Establish standards for validation, observability, and safe execution.
  • Anticipate misuse and system failures, designing preventive controls.
  • Set architectural direction for backend services and platform components.
  • Define reusable abstractions and integration standards for the organization.
  • Influence engineering culture toward defensive design and reliability.

Benefits

  • Comprehensive benefits programs supporting physical, financial, emotional, and social well-being.
  • Eligibility for incentive compensation based on performance and individual contributions.
  • Hybrid work environment, requiring proximity to Farmington Hills, MI.
Full Job Description
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.

What You'll Do
  • 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.
What Differentiates This Role

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

  • You're defining how agents are built across the team - the shared patterns, base abstractions, and "paved road" that make new agents fast to build and safe to run.
  • You're responsible for how we know agents are behaving - observability, evaluation, and continuous governance, not a one-time check.
  • You're growing a team that can reason about non-deterministic systems - where correctness, cost, and safety all have to be designed in, not bolted on.


What You Will Bring
  • 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 Have
  • 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.

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.

#LI-CB2
Principal Software Engineer, Agentic Engineering

About Fifth Third Bancorp

Fifth Third Bancorp is a diversified financial services company, that specializes in small business, retail banking, investments, and mortgage.

Fifth Third Bancorp Careers

Join the vibrant team at Fifth Third Bancorp, a leading financial services company that values innovation, leadership, and diversity. As part of our commitment to professional growth and excellence, we offer a range of job opportunities that empower you to advance your career while contributing to the financial success of our clients. Work You’ll Do At Fifth Third Bancorp, you’ll be part of a culture that cherishes innovation and strategic thinking. Our team is dedicated to providing outstanding financial solutions to individuals and businesses alike. By joining us, you will collaborate with some of the industry’s most talented professionals, using your skills to influence positive change and drive efficiency. Explore a variety of career paths in areas such as finance, technology, customer service, and risk management. Whether you are looking for a full-time position, an internship, or leadership roles, Fifth Third Bancorp offers a dynamic environment where your career can flourish. Innovative Work Engage in projects that harness cutting-edge technology and innovative financial practices. At Fifth Third Bancorp, your work will directly impact our mission to improve lives and contribute to the economic stability of the communities we serve. Our team’s collaborative efforts lead to groundbreaking solutions, setting new standards in the financial industry. Be Part of a Great Team Fifth Third Bancorp is not just a company; it’s a community. Here, diversity and inclusion are at the core of our employment philosophy, ensuring every team member’s voice is heard and valued. We offer diversity training programs that enhance our understanding and appreciation of various perspectives, fostering an inclusive workplace. Future-Proof Your Career With Fifth Third Bancorp, you are set on a path of continuous professional development. Benefit from comprehensive benefits, mentorship, and networking opportunities that propel your career forward. Our leadership is committed to your success, providing support and guidance as you navigate through your career milestones. Stay Connected Join Our Team Discover the array of job opportunities at Fifth Third Bancorp by exploring positions that match your skills and interests. We are constantly hiring creative, curious, and motivated individuals who are ready to make a significant impact. Check out our current openings and find where you fit into our exceptional team. Keep Up to Date Stay informed with the latest career tips, industry insights, and professional growth opportunities available at Fifth Third Bancorp. Our careers blog is a resource for potential and current employees, offering valuable information to enhance your work experience and expand your knowledge base. Job Alert Emails Customize your experience by subscribing to receive job alerts, news, and insider tips tailored to your preferences. Discover the exciting and rewarding career opportunities waiting for you at Fifth Third Bancorp. At Fifth Third Bancorp, we are more than just a bank. We are a place where careers are nurtured, achievements are celebrated, and diversity is embraced. Are you ready to take the next step in your professional journey? Join us and be part of something great.
Learn more about Fifth Third Bancorp
Size
19,247 employees
Market Cap
$22.3 billion
Industry
Net Income
$1.4 billion
Founded
1858
5 Year Trend
+4.4%
NASDAQ

Similar Jobs

More Jobs at Fifth Third Bancorp

More Information Technology Jobs

Find similar Principal Software Engineer, Agentic Engineering jobs: