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About the Role

As a Principal Software Engineer for Cloud Audit Suite, you will be the technical architect and hands-on design leader for our product platforms, integrating multiple products and technology stacks. You will also help drive our shift to an engineering-led, AI-native organization, one where AI writes much of the code and engineers stay in the loop to provide judgment, architecture, and direction where it matters most.

Responsibilities

Own the architecture, system design and AI strategy for Cloud Audit Suite and new integrations.
Drive AI strategy for Cloud Audit Suite and help deliver the company's AI strategy.
Set the technical direction for how we build MCP servers, design agents, find novel uses of LLMs, run experimentation, and stand up scalable solutions.
Build and evolve systems that operate over millions of documents, structured and unstructured data, audit compliance rules, and thousands of concurrent AI interactions.
Interact and lead across several teams of engineers, product, UX design and AI Labs partners to research, design and ship products quickly.
Partner with the CoCounsel Audit Principal Engineer to determine the best ways to integrate Cloud Audit Suite (CAS) and CoCounsel Audi.
Lead multi-quarter initiatives that cut across product engineering, product, labs, UX design and infrastructure/operations teams.
Mentor staff and senior engineers, raising the bar on system design, code quality, and AI-native engineering practices.
Be the expert in new model capabilities and scalable AI integration strategies.
Help shape the team’s roadmap, technical strategy, and engineering culture.
Own the end-to-end architecture and design of backend services (C#/.NET, Python, FastAPI, PostgreSQL, AWS, Vercel).
Build and evolve AI orchestration: routing, tool calling, MCP servers, multi-step workflows, safety and guardrails, and robust error handling around third-party LLMs.
Design for high-throughput, low-latency AI workloads: caching, queuing, rate-limiting, model failover, and cost/performance tradeoffs.
Work with large-scale data: millions of documents, retrieval and search, vector stores, and indexing strategies.
Help establish and refine SLOs, observability, and incident response for AI systems.

Requirements

Bachelors Degree in Computer Science, Computer Engineering, Related Field, or Equivalent Experience
8-10+ years of experience in full-stack application development, including hands-on architecture and design leadership for large-scale systems, building scalable web services and APIs.
C#, .NET expertise and experience with production systems using frameworks like ASP.NET Core (or similar), relational databases (SQLServer, PostgreSQL or equivalent), and a major cloud provider (AWS preferred, Azure).
Experience with Python in AI/ML system development, including model integration, data pipelines, or API-based orchestration
Familiarity with actor model patterns and frameworks (Orleans, Akka, etc.) for resilient, message-driven distributed architectures
Experience architecting and implementing accessible front-end solutions, including: JavaScript, Typescript, HTML, CSS; experience with modern JavaScript frameworks, e.g., Angular, React, etc.
Demonstrated experience and passion for AI systems and new engineering paradigms: LLMs, agents, retrieval, or similar
Strong background in distributed systems and cross-system integration: data modeling, API contracts, integrating across heterogeneous services and technology stacks, observability, resilience patterns, and performance tuning under load.
Proven track record owning large, complex projects end‑to‑end: architecture, execution, rollout, and long‑term support and maintenance.
Excellent communication skills and the ability to partner with product, design, UX design and ML teams in a fast‑moving environment.
Experience designing and implementing CI/CD pipelines (i.e., GitHub Actions)
Hands‑on experience integrating LLM APIs (e.g., OpenAI, Anthropic) into production applications, including prompt/response management, cost controls, and safety considerations.
Experience with AI‑adjacent infrastructure: vector databases, embeddings, semantic search, or custom retrieval pipelines.
Experience having direct interaction and communications with customers.
Opinions and experience around automated testing, reliability, and release practices for systems with nondeterministic model behavior.
Prior experience in domains where correctness, auditability, and compliance matter (fintech, tax, audit, legal, or similar), or strong interest in applying AI in those contexts.

Skills

C#
.NET
ASP.NET Core
SQLServer
PostgreSQL
AWS
Azure
Python
FastAPI
JavaScript
Typescript
HTML
CSS
Angular
React
LLMs
Agents
Retrieval
Actor model patterns
Orleans
Akka
CI/CD pipelines
GitHub Actions
OpenAI API
Anthropic API
Vector databases
Embeddings
Semantic search
Automated testing
System design
API design
Distributed systems
Data modeling
Observability
Resilience patterns
Performance tuning

Location

New York City, NY
San Francisco, CA
Los Angeles, CA
Irvine, CA
McLean, VA
Washington, DC

Work Type

Hybrid
Work from anywhere for up to 8 weeks per year

Experience Level

Principal
8-10+ years of experience in full-stack application development
Hands-on architecture and design leadership for large-scale systems
Building scalable web services and APIs

Education Level

Bachelors Degree in Computer Science, Computer Engineering, Related Field, or Equivalent Experience

Salary/Compensations

$183,100 USD - $340,000 USD (NYC, SF, LA, Irvine, McLean, DC)
$158,900 USD - $295,100 USD (Other US locations)

Benefits

Flexible hybrid working environment
Flex My Way policies
Work from anywhere for up to 8 weeks per year
Career Development and Growth opportunities
Grow My Way programming
Skills-first approach
Flexible vacation
Two company-wide Mental Health Days off
Access to the Headspace app
Retirement savings
Tuition reimbursement
Employee incentive programs
Resources for mental, physical, and financial wellbeing
Market competitive health, dental, vision, disability, and life insurance programs
Competitive 401k plan with company match
Competitive vacation, sick and safe paid time off
Paid holidays
Parental leave
Sabbatical leave
Optional hospital, accident and sickness insurance
Optional life and AD&D insurance
Flexible Spending and Health Savings Accounts
Fitness reimbursement
Access to Employee Assistance Program
Group Legal Identity Theft Protection benefit
Access to 529 Plan
Commuter benefits
Adoption & Surrogacy Assistance
Employee Stock Purchase Plan
Two paid volunteer days off annually
Pro-bono consulting projects
Environmental, Social, and Governance (ESG) initiatives

About the Company

Thomson Reuters products power the professionals who are shaping the world.
Our platforms drive legal, tax, accounting and audit products, including Cloud Audit Suite—a connected set of products spanning Engagement Manager, Guided Assurance, and Confirmation.
We are powered by the talents of 26,000 employees across more than 70 countries, where everyone has a chance to contribute and grow professionally in flexible work environments.
At a time when objectivity, accuracy, fairness, and transparency are under attack, we consider it our duty to pursue them.
Thomson Reuters informs the way forward by bringing together the trusted content and technology that people and organizations need to make the right decisions.
We serve professionals across legal, tax, accounting, compliance, government, and media.
Our products combine highly specialized software and insights to empower professionals with the data, intelligence, and solutions needed to make informed decisions, and to help institutions in their pursuit of justice, truth, and transparency.
Reuters, part of Thomson Reuters, is a world leading provider of trusted journalism and news.

Equal Opportunity

As a global business, we rely on the unique backgrounds, perspectives, and experiences of all employees to deliver on our business goals. To ensure we can do that, we seek talented, qualified employees in all our operations around the world regardless of race, color, sex/gender, including pregnancy, gender identity and expression, national origin, religion, sexual orientation, disability, age, marital status, citizen status, veteran status, or any other protected classification under applicable law.
Thomson Reuters is proud to be an Equal Employment Opportunity Employer providing a drug-free workplace.
Thomson Reuters makes reasonable accommodations for applicants with disabilities, including veterans with disabilities, and for sincerely held religious beliefs in accordance with applicable law.
If you reside in the United States and require an accommodation in the recruiting process, you may contact our Human Resources Department at HR.Leave-Expert@thomsonreuters.com.
Disability accommodations in the recruiting process may include things like a sign language interpreter, making interview rooms accessible, providing assistive technology, or other relevant accommodations.
Please note this email is not intended for general recruitment questions and we will promptly respond to inquiries regarding accommodations.
More information on requesting an accommodation here.
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More information about Thomson Reuters can be found on thomsonreuters.com