Senior Software Engineer
About The Position
Thomson Reuters is seeking a Senior Front-End Software Engineer AI to join the CoCounsel team, which builds AI agentic products for legal professionals. The role turns early concepts into scalable, production-ready features for Litigation Drafting products. It owns client architecture for streaming agent interactions, from React UI through production delivery, and builds interfaces that make long-running drafting workflows with frequent human input intuitive, responsive, and controllable. The engineer will work with front-end engineers and architects, the Labs team, product managers, and designers. The role includes shaping agentic UI design, productionizing AI capabilities, improving testing and observability, and mentoring engineers. It suits a collaborative, fast-moving team member who can work from ambiguous requirements, propose new approaches, and deliver reliable, accessible products.
Requirements
- At least 4 years of front-end engineering experience, including significant production experience with React and TypeScript building products for real customers.
- A track record of building performant user interfaces under 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, or CodePipeline.
- Experience modeling complex asynchronous client states.
- Excellent debugging skills and the ability to deliver production-ready, highly reliable 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, or 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 that turn SSE and AG-UI protocol event streams into user-facing experiences, with an understanding of agent runtimes such as Claude Agent SDK and AgentCore.
- Contribute to front-end architecture and help drive innovation in agentic UI design across the CoCounsel team.
- Build and maintain front-end and agent-facing infrastructure CI/CD pipelines; run deployments and smoke tests.
- Help build end-to-end Playwright tests for scale testing and add observability to the client and delivery process.
- Work 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 well-tested shared components.
Benefits
- Flexible hybrid work environment for office-based roles.
- Work from anywhere 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 and access to the Headspace app.
- Health, dental, vision, disability, and life insurance.
- Retirement savings plan with company match.
- Tuition reimbursement.
- Employee incentive programs and potential annual bonus based on enterprise and individual performance.
- Resources for mental, physical, and financial wellbeing, including fitness reimbursement and access to an Employee Assistance Program.
- Parental leave and sabbatical leave.
- Paid volunteer days and opportunities to participate in pro-bono consulting and ESG initiatives.
- Flexible Spending and Health Savings Accounts.
- Adoption and surrogacy assistance.
- Employee Stock Purchase Plan.
- Commuter benefits.
- Optional hospital, accident and sickness insurance; optional life and AD&D insurance; group legal identity theft protection; and access to a 529 Plan.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
