Senior Software Engineer

Thomson Reuters•Eagan, MN

1d•$102,200 - $189,800•Hybrid

About The Position

Thomson Reuters is seeking a Senior Front-End Software Engineer AI to join the CoCounsel team, which builds agentic AI products for legal professionals. The team turns early concepts into scalable, production-ready features. In this role, you will own client architecture for streaming agent interactions, from the React UI through production delivery. You will work on Litigation Drafting products that combine complex workflow interfaces with an advanced legal agent. The interface supports long-running processes with frequent human input and should make demanding drafting tasks intuitive, responsive, and controllable. The role offers opportunities to contribute ideas, try new approaches, learn technologies, and take accountability for end-to-end delivery in a fast-paced environment. You will build front-end systems for AI agents, help shape front-end architecture and agentic UI design, and productionize AI capabilities through delivery infrastructure, testing, and observability. You will work closely with Labs, product managers, designers, and other engineers, and help develop the team through reviews, design documentation, mentoring, and shared components. The role is hybrid for office-based employees. Eligible US locations have a base compensation range of $102,200–$189,800 USD, with placement based on factors including knowledge, skills, experience, and internal equity. The role may also be eligible for an annual bonus based on enterprise and individual performance.

Requirements

At least 4 years of front-end engineering experience, including significant production experience with React and TypeScript building products used by real customers.
Track record of building performant user interfaces that handle rapid, continuous updates.
Hands-on experience with the AG-UI protocol or comparable agent-UI protocols and SDKs.
Strong proficiency with SSE events, Claude Agent SDK, AgentCore, and AWS or Azure cloud services.
Hands-on experience building and owning CI/CD pipelines for production web applications, including automated testing and safe release practices; examples include GitHub Actions, GitLab CI, and CodePipeline.
Experience modeling complex asynchronous client states.
Excellent debugging skills and demonstrated ability to deliver reliable, production-ready systems.
Strong cross-functional communication skills and comfort working in fast-paced, iterative environments.
Strong product sense and ability to turn ambiguous requirements into polished, accessible interfaces.

Nice To Haves

BA or BS in Computer Science, or equivalent practical experience.
Knowledge of backend streaming patterns, such as Node or Python/FastAPI, sufficient to debug end to end.
Experience with feature flags such as LaunchDarkly and canary releases.
Familiarity with tool calling, structured outputs, MCP, and streaming partial JSON parsing.
Experience with Datadog (logs/RUM/traces), CloudWatch Log Insights, and Braintrust.
Strong opinions on testing, automation, and operational robustness.
Prior experience working on products for legal, compliance, or other regulated professional domains.

Responsibilities

Build fast, resilient front-end interfaces from event streams, including SSE and AG-UI protocol events, and understand the agent runtimes behind them.
Contribute to front-end architecture and help drive innovation in agentic UI design across the CoCounsel team.
Build and maintain CI/CD pipelines for the front end and agent-facing infrastructure; run deployments and smoke tests.
Help build end-to-end Playwright tests for scale testing and add observability to the client and delivery process.
Partner with the Labs team, product managers, and designers to turn early AI agent concepts into scalable, production-ready product features.
Mentor engineers through code reviews, design documents, and shared, well-tested components.

Benefits

Flexible hybrid work environment for office-based roles.
Work-from-anywhere flexibility for up to 8 weeks per year.
Flexible vacation and paid time off, including sick and safe time off and paid holidays.
Two company-wide Mental Health Days off annually and access to the Headspace app.
Retirement savings plan with company match.
Tuition reimbursement.
Employee incentive programs; the role may also be eligible for an annual bonus.
Health, dental, vision, disability, and life insurance programs.
Parental leave and sabbatical leave.
Flexible Spending and Health Savings Accounts.
Fitness reimbursement and resources for mental, physical, and financial wellbeing.
Employee Assistance Program.
Commuter benefits.
Adoption and surrogacy assistance.
Employee Stock Purchase Plan.
Two paid volunteer days off annually and opportunities to participate in pro-bono consulting and ESG initiatives.
Optional hospital, accident and sickness insurance, optional life and AD&D insurance, and group legal identity theft protection, each paid 100% by the employee.