Engineer III

The candidate for this exciting opportunity will need to be living in the San Antonio, Texas area. This role will require 3 to 4 days per week at the One Frost Corporate Campus office. Frost will help with relocation costs to move to San Antonio, Texas if one is not currently living in San Antonio, Texas.

Immigration Sponsorship: Unfortunately, we currently are not able to sponsor or transfer a sponsorship to Frost. This includes, but is not limited to: H-1B, TN, OPT, O-1, H4EAD, F-1, L-1.

Job Description

It's about innovation and creation.

Are you described as someone with an inquisitive mind and an innovative personality? Are you fascinated by the power of AI and how it can help make lives better? Does solving problems and ensuring top-quality systems excite you? If so, being an Engineer III – AI with Frost could be for you.

At Frost, it's about more than a job. It's about having a flourishing career where you can thrive, both in and out of work. At Frost, we're committed to fostering an environment that reflects our values and encourages team members to be the best they can be. In joining our adaptable, integrity-driven team, you'll become part of Frost's over 150-year legacy of providing unparalleled banking services.

Who You Are

As an
Engineer III - AI
,
you
believe in using technology to do the right thing. You thrive on designing thoughtful, intelligent workflows and are excited by the future of AI. In this role, you will lead technical efforts on AI reliability, bias mitigation, and adrift detection. You believe in effective communication and will have the opportunity to address potential problems with solutions to complex issues. More than that, this role is about constant improvement and doing so with our signature all-win approach in mind.

What You'll Do

• Design and architect intelligent systems and workflows that leverage agentic behavior and LLM decision-making capabilities
• Drive design sessions for agent loop architectures, tool orchestration, and task planning
• Lead technical efforts on AI reliability, bias mitigation, and drift detection
• Collaborate with product and design leaders to define outcomes and performance metrics
• Act as a system designer and workflow architect, not just a code implementer
• Evaluate agent behavior using AI principles (fairness, reliability, explainability, safety)
• Optimize performance of agentic systems with caching, throttling, and fallback strategies
• Mentor engineers in best practices for LLM prompting, agent decomposition, and tool design
• Always take action using Integrity, Caring, and Excellence to achieve all-win outcomes

What You'll Need

• Bachelor's in Computer Science, Data Science, or related field
• 4+ years of experience with enterprise-grade AI/ML systems
• Deep understanding of event-driven design, API orchestration, prompt engineering, tool orchestration, planner/verifier roles, and system modularity
• Strong skills in prompt engineering, memory and context handling, and agent loop optimization
• Experience leading teams in applying LLMs and autonomous agents to real-world problems
• Strong experience with Python, FastAPI, LangChain, vector databases, and agent loop architectures
• Excellent written and verbal communication skills
• Proficient in Microsoft computer applications

Additional Preferred Skills

• Experience creating reusable agent libraries or co-pilots
• Open-source contributions to AI frameworks or tooling
• Experience with tools like LangGraph, CrewAI, or Autogen

Our Benefits

At Frost, we care about your health, your family, and your future and strive to have our benefits reflect that. This includes:

• Medical, dental, vision, long-term disability, and life insurance
• 401(k) matching
• Generous holiday and paid time off schedule
• Tuition reimbursement
• Extensive health and wellness programs, including our Employee Assistance Program
• Referral bonus program + more

Since 1868, Frost has dedicated their expertise to provide exceptional banking, investment, and insurance services to businesses and individuals throughout Texas. Frost is one of the 50 largest U.S. banks by asset size and is a leader in banking customer satisfaction. At Frost, it's about being part of something bigger. If this sounds like you, we encourage you to apply and see what's possible at Frost.