Principal Engineer

Thomson Reuters

Principal Software Engineer developing AI orchestration for CoCounsel. Collaborating with cross-functional teams to create reliable workflows for legal professionals.

Posted 7/22/2026full-timeEagan • Minnesota, Missouri, New York, Texas • 🇺🇸 United StatesLead💰 $158,900 - $340,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in identity and access management, with a strong focus on designing and integrating authentication and authorization systems at scale. Proven ability to lead technical initiatives, mentor engineers, and shape engineering culture while ensuring high-performance AI workloads and compliance with legal standards.

Highest-signal resume keywords

Identity And Access ManagementPython ExpertiseDistributed SystemsAI IntegrationTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Authentication DesignAuthorization DesignSSOSAMLOIDCOAuth 2.0RBACABACData ModelingAPI Contracts

Soft Skills

Excellent CommunicationMentoring

Tools & Technologies

FastAPIPostgreSQLAWSCloud Provider

Certifications & Qualifications

Bachelor’s Degree In Computer Science

Industry Keywords

Multi-Tenancy IsolationData ResidencyPrivilege ProtectionAudit TrailsLegal Workflows

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsPostgresPython

About the role

Key responsibilities & impact

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 – considering roles, autonomous agents, etc.
Partner with security, platform, and compliance teams on multi-tenancy isolation, data residency, privilege protection, and the audit trails that legal and government customers require.
Join a tight group of senior engineers and researchers shipping quickly, with direct access to product leadership and customers.
Technical leadership and cross-functional influence: 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 across the org.
Help shape the team’s roadmap, technical strategy, and engineering culture – from experimentation practices to testing, rollout, and postmortems.
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 tailored to legal use cases.
Establish and refine SLOs, observability, and incident response for AI systems that must be correct, auditable, and trustworthy in professional legal workflows.

Requirements

What you’ll need

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.

Benefits

Comp & perks

Hybrid Work Model: flexible hybrid working environment (2-3 days a week in the office)
Flex My Way: supportive workplace policies for personal and professional responsibilities
Career Development and Growth: culture of continuous learning and skill development
Industry Competitive Benefits: comprehensive benefit plans including flexible vacation, Mental Health Days off, access to Headspace app, retirement savings, tuition reimbursement
Culture: recognized for inclusion and belonging, flexibility, work-life balance
Social Impact: two paid volunteer days off annually, opportunities for pro-bono consulting projects and ESG initiatives
Additional benefits: optional hospital, accident and sickness insurance, optional life and AD&D insurance, Flexible Spending and Health Savings Accounts, fitness reimbursement, Employee Assistance Program, Group Legal Identity Theft Protection benefit, access to 529 Plan, commuter benefits, Adoption & Surrogacy Assistance, Tuition Reimbursement, Employee Stock Purchase Plan