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 in software engineering focused on backend systems, APIs, and microservices.
  • Proficiency in Python, FastAPI, PostgreSQL, and AWS services, with expertise in distributed systems.
  • Experience with designing and deploying agentic AI workflows, including orchestration and multi-step reasoning.
  • Strong debugging skills and capability to deliver reliable systems.
  • Effective communication skills in fast-paced, collaborative environments.

Responsibilities

  • Design and build AI-driven backend services to facilitate real-time interactions.
  • Define architectural components and system interfaces for the AI platform.
  • Integrate systems with modern LLM providers for enhanced functionality and performance.
  • Collaborate with cross-functional teams to develop scalable features for international markets.
  • Provide mentorship and technical guidance to fellow engineers.

Benefits

  • Flexible hybrid work environment with remote options.
  • Policies supporting work-life balance, including up to 8 weeks of work-from-anywhere.
  • Opportunities for career development through continuous learning initiatives.
  • Comprehensive benefits including mental health days, retirement savings, and tuition reimbursement.
  • Recognition for fostering an inclusive and collaborative culture.
  • Opportunities for community impact through paid volunteer days and pro-bono projects.
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: Weve 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 tomorrows 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.

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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