# Senior Software Engineer — Customer Files Orchestration **Company**: CoCounsel Legal **Location**: Mexico City **Work arrangement**: hybrid **Experience**: senior **Job type**: full-time **Category**: Engineering **Industry**: Technology **Apply**: https://thomsonreuters.wd5.myworkdayjobs.com/en-US/External_Career_Site/job/Mexico-Mexico-City/Senior-Software-Engineer-II_JREQ202776?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply **Canonical**: https://yubhub.co/jobs/job_871508e6-464 ## Description CoCounsel Legal is seeking a Senior Software Engineer to help build and operate the Customer Files Orchestration Service – the system that makes a customer's own documents usable by CoCounsel Legal's agents. Every file a customer brings to CoCounsel passes through this team: upload, storage, extraction, embedding, and indexing, orchestrated end-to-end. You make millions of customer files available to CoCounsel. Bringing a customer's content together with Thomson Reuters' world-class proprietary content and the latest frontier models – including TR's own custom large language models – is what makes our products highly differentiated and our agent experiences genuinely grounded. **Key Responsibilities:** - Design & Technical Ownership: Own the orchestration service end-to-end – Take an ambiguous problem, shape it into a design, write the ADR, build it, ship it, and operate it. - Make and defend the calls that define this domain – Where eventual consistency is safe and where only a strongly-consistent read is correct. - Build the queuing and flow-control machinery – Fair queuing so one busy tenant cannot starve another, rate limiting, backpressure, circuit breaking, dead-letter handling, and autoscaling. - Treat our APIs as a product – CoCounsel's file and workspace APIs serve a growing set of consumers beyond orchestration. - Design for correctness at scale, not correctness in a test – Anticipate the failure modes that only appear under concurrency and load and build systems where whole classes of bugs cannot occur. **Reliability & Operations:** - Operate what you build – Take a primary on-call rotation for the service, lead incident response, and drive the post-mortem that keeps the same failure from recurring. - Make the system explain itself – Instrument and trace well enough to tell "we never notified downstream" apart from "we notified downstream too early". - Reduce operational toil deliberately – Automate the recurring manual fix and treat a runbook step that exists only in someone's head as a defect. **Technical Leadership & Collaboration:** - Raise the bar around you – Mentor engineers through code review and design review. - Work well across boundaries – Partner with the storage, extraction, indexing, connectors, and front-end teams to ensure we all ship something great. - Fully integrate Architecture and DevOps – You are part of a team where engineers do the system design. **Required Qualifications:** - Bachelor's or master's degree – Computer Science, Engineering, or a related field, or equivalent practical experience. - 5+ years building production software – With a track record of owning significant components in systems that real customers depend on. - Extensive AWS and production Python experience – This is a Python service on AWS, and you should be able to move confidently through both the code and the infrastructure. - Concurrency in Python, and a healthy respect for how treacherous it is – You understand the GIL and what it does and does not protect you from. - Kubernetes in production – Our workers and APIs run as pods with event-driven autoscaling (KEDA). - Large-scale orchestration or data pipeline experience – Systems that move large volumes of work through multiple stages across service boundaries. **Benefits:** - Hybrid Work Model: We've 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. - Career Development and Growth: By fostering a culture of continuous learning and skill development, we prepare our talent to tackle tomorrow's challenges. - 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. ## Skills ### Required - Python - AWS - Kubernetes - Concurrency - Distributed Systems - API Design ### Nice to have - Documents and document management systems - Event-driven architectures and streaming - Durable workflow engines - Retrieval, embedding, or indexing pipelines - Prior exposure to the legal industry --- Source: [Apply at thomsonreuters.wd5.myworkdayjobs.com](https://thomsonreuters.wd5.myworkdayjobs.com/en-US/External_Career_Site/job/Mexico-Mexico-City/Senior-Software-Engineer-II_JREQ202776?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)