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Principal AI Software Engineer jobs in United States
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Taxwell · 8 hours ago

Principal AI Software Engineer

Taxwell is a leading digital tax filing platform that helps Americans maximize their tax refunds through innovative technology. They are seeking a Principal AI Software Engineer to lead the design and deployment of AI-powered systems, enhancing both internal processes and customer-facing products.
Enterprise SoftwareAccountingSoftwareTax Preparation

Responsibilities

Design and build AI-powered tools that improve productivity across engineering and non-engineering teams (e.g., developer workflows, customer support tooling, tax development, operations, compliance, and analytics)
Develop internal AI platforms, shared services, and reusable components that enable teams to safely and effectively build AI-powered applications
Build and maintain retrieval-augmented generation (RAG) systems grounded in internal documentation, codebases, tax knowledge, and proprietary data
Partner with DevOps, platform, and security teams to ensure AI systems are scalable, observable, secure, and compliant
Embed AI capabilities into existing Taxwell products to improve accuracy, usability, personalization, and customer outcomes
Architect and build new customer-facing products where AI is a core differentiator, not an add-on
Work closely with product, design, and tax domain experts to translate real user problems into effective AI powered solutions
Ensure AI features meet high standards for reliability, explainability, and trust—especially in a regulated domain like tax
Design and implement agent-based systems using frameworks such as LangChain, LangGraph, ADK, or similar
Evaluate and integrate commercial and open-source AI technologies, including frontier models and open-weight LLMs
Establish best practices for prompt engineering, evaluation, monitoring, and continuous improvement of AI systems
Influence AI architecture and technical direction across the organization through design review and hands-on collaboration
Measure system effectiveness using telemetry, automated metrics, and qualitative feedback from internal and external users

Qualification

AI system designPythonLLM-enabled systemsAWS deploymentVector databasesTechnical leadershipCollaborationProblem-solving

Required

10+ years of software engineering experience, including 3+ years' operating at a Principal- or Staff-level role
Proven experience designing and deploying production AI systems used by real users
Strong hands-on experience with LLM-enabled systems, including prompt engineering, RAG, and agent orchestration
Proficiency in Python and/or TypeScript
Experience integrating AI systems with real-world applications, workflows, and data sources
Familiarity with vector databases and embedding techniques (e.g., Pinecone, FAISS, Chroma)
Experience deploying and operating systems on AWS, GCP, or Azure
Strong architectural judgment and the ability to balance experimentation with production rigor

Preferred

Experience building AI platforms or internal copilots used across multiple teams or departments
Experience developing customer-facing AI products at scale
Background in regulated industries such as fintech, tax, or healthcare
Experience fine-tuning or customizing open-weight models (e.g., GPT-OSS-120B, Mistral 3, GLM-4.7)

Company

Taxwell

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Taxwell is a digital tax filing platform that offers tax preparation software solutions.

Funding

Current Stage
Late Stage
Company data provided by crunchbase