Thomson Reuters

Senior Software Engineer - AI, CoCounsel International

Thomson Reuters$110K — $204K *
Legal & Accounting
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 4+ years of professional software engineering experience building production backend systems and APIs.
  • Strong proficiency in Python, FastAPI, PostgreSQL, and AWS cloud services.
  • Proven experience designing and deploying production-grade agentic AI workflows.
  • Excellent debugging skills and ability to deliver reliable systems.
  • Strong cross-functional communication skills and comfort in fast-paced environments.

Responsibilities

  • Design and build backend services for real-time AI interactions and data flows.
  • Define scalable design patterns and system interfaces for the AI platform architecture.
  • Integrate systems with modern LLM providers, ensuring reliable performance and orchestration.
  • Collaborate with cross-functional teams to develop scalable features for international products.
  • Mentor and guide other engineers through code reviews and technical support.

Benefits

  • Hybrid work model for flexible office and remote arrangements.
  • Supportive workplace policies for work-life balance and personal responsibilities.
  • Opportunities for continuous learning and career development.
  • Comprehensive benefits including flexible vacation and mental health resources.
  • Award-winning culture focused on inclusion, flexibility, and valuable customer engagement.
  • Paid volunteer days and opportunities for social impact initiatives.
Full Job Description

Job Description

We're looking for a Senior Software Engineer – AI to join the CoCounsel International team and work closely with our Labs team to build new AI agents and adapt them for our international products and features. In this role, you'll build the backend services that bring these agentic capabilities to life, and help take early Labs concepts into scalable, production-ready features used by legal professionals worldwide.

Ifyou'repassionate about building AI agents and bringing new capabilities to life for legal professionals around the world,we'dlove to hear from you. Join us to build, innovate, and make a lasting impact on ourCoCounselapplication. Apply today!

Key Responsibilities

  • Build AI-Powered Backend Systems:Design and build backend services using Python,FastAPI, and PostgreSQL to support real-time AI interactions and large-scale data flows, with direct contribution to AI-powered capabilities such as agentic workflows, LLM orchestration, and content pipelines.

  • Shape Platform Architecture:Define service boundaries, system interfaces, and scalable design patterns that form the architectural foundation of our AI platform.

  • Productionize AI Capabilities:Integrate backend systems with modern LLM providers (e.g., OpenAI, Anthropic) and implement reliable orchestration, routing, error handling, guardrails, telemetry, and deep observability for performance and reliability.

  • Collaborate Cross-Functionally:Partner closely with our Labs team, product managers, and designers to take early AI agent concepts and turn them into scalable, production-ready features for our international products.

  • Mentor Engineers:Support the growth of other engineers through pairing, code reviews, and ongoing technical guidance.

Required Qualifications

  • Technical Experience:4+ years of professional software engineering experience building and shipping production backend systems, APIs, and microservices used by real customers.

  • Backend & Cloud Skills:Strongproficiencyin Python,FastAPI, PostgreSQL, and AWS cloud services, with a deep understanding of distributed systems, architecture, and data modeling.

  • Agentic AI Experience:Proven experience designing, building, and deploying production-grade agentic AI workflows 6 including multi-step reasoning, tool/API orchestration, and LLM-as-judge or eval-driven quality gates 6 serving real end users at scale.

  • Technical Judgment:Excellent debugging skills and a proven ability to deliver production-ready,highly reliablesystems.

  • Collaboration & Communication:Comfortable operating in fast-paced, iterative environments, with strong cross-functional communication skills.

Preferred Qualifications

  • BA or BS in Computer Science or equivalent practical experience

  • Experience with performance optimization for backend systems, including monitoring, profiling, and tuning for scale

  • Hands-on experience building AI-powered product features, including LLM APIs, RAG pipelines, or agentic workflows in a production environment

  • Familiarity with AI/ML infrastructure including vector databases, model serving, and cost/latency optimization for LLM-powered features

  • Strong opinions on testing, automation, and operational robustness

  • Prior experience working on products for legal, compliance, or other regulated professional domains

#LI-ES1


Whats in it For You?

  • Hybrid Work Model: We7ve adopted a flexible hybrid working environment for our office-based roles while delivering a seamless experience that is digitally and physically connected.
  • Flexibility & Work-Life Balance: Flex My Way is a set of supportive workplace policies designed to help manage personal and professional responsibilities, whether caring for family, giving back to the community, or finding time to refresh and reset. This builds upon our flexible work arrangements, including work from anywhere for up to 8 weeks per year, empowering employees to achieve a better work-life balance.
  • Career Development and Growth: By fostering a culture of continuous learning and skill development, we prepare our talent to tackle tomorrow7s challenges and deliver real-world solutions. Our Grow My Way programming and skills-first approach ensures you have the tools and knowledge to grow, lead, and thrive in an AI-enabled future.
  • Industry Competitive Benefits: We offer comprehensive benefit plans to include flexible vacation, two company-wide Mental Health Days off, access to the Headspace app, retirement savings, tuition reimbursement, employee incentive programs, and resources for mental, physical, and financial wellbeing.
  • Culture: Globally recognized, award-winning reputation for inclusion and belonging, flexibility, work-life balance, and more. We live by our values: Obsess over our Customers, Compete to Win, Challenge (Y)our Thinking, Act Fast / Learn Fast, and Stronger Together.
  • Social Impact: Make an impact in your community with our Social Impact Institute. We offer employees two paid volunteer days off annually and opportunities to get involved with pro-bono consulting projects and Environmental, Social, and Governance (ESG) initiatives.
  • Making a Real-World Impact:We are one of the few companies globally that helps its customers pursue justice, truth, and transparency. Together, with the professionals and institutions we serve, we help uphold the rule of law, turn the wheels of commerce, catch bad actors, report the facts, and provide trusted, unbiased information to people all over the world.

Eligible office location(s) for this role include one or more of the following: New York City, San Francisco, Los Angeles, and/or Irvine, CA; McLean, VA; Washington, DC. The base compensation range for the role in any of those locations is $127,000 USD - $235,000 USD. For any eligible US locations, unless otherwise noted, the base compensation range for this role is $110,000 USD - $204,200 USD. Base pay is positioned within the range based on several factors including an individual7s knowledge, skills and experience with consideration given to internal equity. Base pay is one part of a comprehensive Total Reward program which also includes flexible and supportive benefits and other wellbeing programs. This role may also be eligible for an Annual Bonus based on a combination of enterprise and individual performance.

About Thomson Reuters

Thomson Reuters Corporation is a Canadian multinational media conglomerate. The company was founded in Toronto, Ontario, Canada, where it is headquartered at 333 Bay Street. Thomson Reuters provides professionals with the intelligence, technology, and human expertise they need to find trusted answers in the financial and risk, legal, tax and accounting, and media markets. The company is dual-listed on the New York Stock Exchange and the Toronto Stock Exchange. In 2019, the company reported revenues of $5.9 billion and net income of $1.3 billion.
Learn more about Thomson Reuters
Size
24,400 employees
Market Cap
$53.8 billion
Industry
Founded
2008
5 Year Trend
-10.7%
NASDAQ

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