Developer Jobs in Wilmington, DE

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1d ago

Lead AI Software Engineer

Liberty Personnel Services, Inc, LP86342 Wilmington, DE

Wilmington, DE

1d ago

$150k - $165k/yr Full time Senior Artificial Intelligence Cloud Operations

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Job Description

Liberty Personnel Services, Inc. is seeking a senior, hands-on AI software engineer to design, build, and operate production-grade AI systems that drive real business outcomes. You will own the end-to-end lifecycle from prototyping LLM applications to production deployment, including intelligent agents and automation services, in a hybrid work setup based in Wilmington, Delaware.

Responsibilities

Develop and deploy applications powered by large language models.
Deliver internal copilots, workflow automations, and intelligent agents.
Advance solutions from proof-of-concept to reliable, SLA-backed production services.
Incorporate observability, rollback plans, and resilience from day one.
Own retrieval-augmented generation (RAG) systems.
Design ingestion, embeddings, chunking, indexing, and hybrid retrieval pipelines.
Implement reranking and evaluation strategies for retrieval quality.
Continuously measure and improve retrieval performance using structured offline and online metrics.
Architect scalable AI infrastructure in AWS with security considerations.
Implement identity controls, secrets management, and usage governance.
Automate infrastructure provisioning and establish reusable patterns for AI workloads.
Establish observability and reliability for AI systems with tracing, logging, and version tracking for prompts and agents.
Create evaluation dashboards, regression alerts, and canary testing strategies.
Develop testing frameworks tailored for non-deterministic AI behavior.
Implement guardrails and governance controls to regulate AI outputs and policies.
Enforce PII protections, access controls, audit logging, and review workflows.
Build safeguards to mitigate hallucination risk, unsafe outputs, and policy violations.
Drive cost and performance optimization through batching, caching, routing, and scaling strategies.
Establish clear unit economics and continually reduce run-rate model costs.
Provide reusable templates, SDKs, and abstractions to accelerate safe AI development for teams.
Raise the bar on AI engineering standards and best practices across teams.
Operate what you build by participating in on-call rotations and writing runbooks to prevent single points of failure.
Treat AI systems with the same operational rigor as modern production services.

Requirements

5 to 10 years of professional software engineering experience.
At least two years building and deploying AI/LLM applications in production environments.
Proficiency in Python and strong backend engineering fundamentals.
Experience designing and tuning RAG systems, including embeddings, hybrid search, reranking, and vector databases.
Familiarity with commercial or open-source model providers and multi-step orchestration.
Experience with CI/CD, containerization, cloud infrastructure (AWS preferred), and production operations.
Hands-on experience with observability, tracing, and monitoring tools.
Strong focus on cost efficiency, quality, and risk management in AI systems.
Ability to collaborate cross-functionally and mentor other engineers.

Technologies

Python, AWS, vector databases, CI/CD, containers

Nice to have

Experience fine-tuning or model distillation.
Familiarity with orchestration platforms for ML and data workflows.
Exposure to container orchestration or high-performance API frameworks.
Experience integrating structured and warehouse-based data sources into retrieval systems.

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