Principal Engineer at Thomson Reuters | Ann Arbor, MI, US | Rezi

Principal Engineer at Thomson Reuters

Principal Engineer

Thomson Reuters · Ann Arbor, MI, US

1 months ago

Principal Engineer

Thomson Reuters · Ann Arbor, MI, US

a month ago
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About the Role

Set the technical direction for the backend, AI orchestration, and identity systems for CoCounsel, our advanced AI offering. Partner closely with AI/ML engineers, researchers, product, and identity and platform teams to deliver world-class legal content and AI experiences at scale.

Responsibilities

  • Own identity and trust at the core: Set the direction for how users, agents, and services authenticate and authorize across CoCounsel Legal.
  • Own the design and evolution of authentication and authorization across CoCounsel Legal.
  • Partner with security, platform, and compliance teams on multi-tenancy isolation, data residency, privilege protection, and audit trails.
  • Lead and/or design initiatives that cut across AI, product, identity, and infrastructure.
  • Mentor staff and senior engineers, raising the bar on AI integration practices, system design, code quality, and security.
  • Be the expert in new model capabilities, collaborating closely with AI/ML engineers, researchers, designers, and PMs.
  • Help shape the team’s roadmap, technical strategy, and engineering culture.
  • Design for high-throughput, low-latency AI workloads: caching, queuing, rate-limiting, model failover, and cost/performance trade-offs.
  • Work with large-scale data: millions of documents, retrieval and search, vector stores, and indexing strategies.
  • Establish and refine SLOs, observability, and incident response for AI systems.

Requirements

  • Bachelor’s Degree in Computer Science, Computer Engineering, a related field, or equivalent experience.
  • Hands-on experience with identity and access management – designing or integrating authentication and authorization at scale (SSO, SAML, OIDC, OAuth 2.0, RBAC/ABAC, token/session management, or comparable IAM systems).
  • Deep Python expertise and experience with production systems using frameworks like FastAPI (or similar), relational databases (PostgreSQL or equivalent), and a major cloud provider (AWS preferred).
  • Strong background in distributed systems: data modeling, API contracts, observability, resilience patterns, and performance tuning under load.
  • Demonstrated experience building with AI – LLMs, agents, and retrieval – and a strong point of view on what “AI-native” software should look like.
  • Proven track record owning large, complex projects end-to-end: architecture, execution, rollout, and long-term operation.
  • Excellent communication skills and the ability to partner with product, design, security, and ML teams in a fast-moving environment.

Skills

  • Identity and access management
  • Authentication and authorization
  • SSO
  • SAML
  • OIDC
  • OAuth 2.0
  • RBAC/ABAC
  • Token/session management
  • Python
  • FastAPI
  • Relational databases
  • PostgreSQL
  • AWS
  • Distributed systems
  • Data modeling
  • API contracts
  • Observability
  • Resilience patterns
  • Performance tuning
  • AI
  • LLMs
  • Agents
  • Retrieval
  • Identity providers (e.g., Okta, Auth0, Entra ID/Azure AD, AWS Cognito)
  • Multi-tenant isolation
  • Secrets management
  • Zero-trust patterns
  • Agentic systems
  • Tool calling
  • MCP servers
  • Multi-step workflows
  • Orchestration
  • Third-party and in-house LLMs (e.g., Anthropic, OpenAI)
  • Prompt/response management
  • Cost controls
  • Safety considerations
  • AI-adjacent infrastructure
  • Vector databases
  • Embeddings
  • Semantic search
  • Custom retrieval pipelines
  • Automated testing
  • Reliability
  • Release practices for systems with non-deterministic model behavior

Location

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

Work Type

  • Hybrid
  • Work from anywhere for up to 8 weeks per year

Experience Level

  • Principal
  • Senior

Education Level

  • Bachelor’s Degree in Computer Science, Computer Engineering, a related field, or equivalent experience.

Salary/Compensations

  • $183,100 USD - $340,000 USD
  • $158,900 USD - $295,100 USD

Benefits

  • 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

About the Company

  • 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.
  • 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.
  • Join us and help shape the industries that move society forward.

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.