**Job Description:** Join AT&T and help shape the future of communications and technology that connect the world. We value innovators who seek to explore the unknown and challenge the status quo. Bring your bold ideas and fearless spirit to redefine connectivity and transform how people share stories and experiences. At AT&T, you won’t just imagine the future—you’ll build it. AT&T is looking for a Principal Software Engineer to help build our new Mexico City engineering team. You will be responsible for hiring, growing, and leading technical teams. You will set the technical direction, coach and mentor fellow developers, and ensure the adoption of best practices, modern standards, and cutting-edge tools to accelerate our digital transformation. You will architect, design, and deliver robust, scalable systems in a collaborative, agile environment with a strong focus on excellence, innovation, and continuous improvement. **What You Will Do:** + Lead cross-functional teams in the end-to-end delivery of complex software projects across the full software development lifecycle (SDLC). + Architect, design, and implement modern, scalable applications with deep expertise in one of: Java (Spring Boot), Python (FastAPI), or Node.js (Nest); and working knowledge of the other two. + Drive adoption and refinement of best practices in software engineering, code quality, testing, and DevOps. + Champion the use of AI-driven tools (e.g., GitHub Copilot, LLMs, RAGs) and evaluate emerging technologies for business impact. + Oversee the design and implementation of robust data persistence layers leveraging SQL and NoSQL databases (CosmosDB, MongoDB, PostgreSQL, Snowflake, Databricks). + Guide the implementation of modern testing frameworks (Playwright, Cypress), code review, static analysis (Lint, Prettier, Veracode, SonarQube), and CI/CD pipelines (GitHub Actions, Terraform). + Ensure robust API design (REST, OpenAPI/Swagger) and secure, efficient event-driven architectures (Kafka, messaging services). + Promote cloud-native development and efficient use of Azure, Docker, and Kubernetes across teams. + Foster a culture of agile excellence (Agile/Scrum, SAFe, Kanban) and continuous delivery. + Collaborate with stakeholders, product managers, and architects to translate business requirements into world-class solutions. + Coach, mentor, and provide technical guidance to engineers at all levels. + Liaise with external partners and vendors where appropriate. **What You Will Need:** + Deep expertise in one of: Java (Spring Boot), Python (FastAPI), or Node.js (Nest), with working knowledge of the other two. + Advanced experience with SQL and NoSQL databases, especially CosmosDB, MongoDB, PostgreSQL, Snowflake, and Databricks. + Proficiency with event-driven architecture, Kafka, and messaging services. + Mastery of modern API design: REST, Swagger, OpenAPI. + Expertise in automated testing and QA practices: Playwright, Cypress. + Advanced experience with code quality and security tools: Lint, Prettier, Veracode, SonarQube. + Strong background in CI/CD automation (GitHub Actions, Terraform) and cloud-native platforms (Azure, Docker, Kubernetes). + Deep understanding of the full SDLC, Agile/Scrum, SAFe, and Kanban. + Familiarity with enterprise platforms such as ServiceNow, Salesforce, and TM Forum (highly desirable). **Additional Desirable Experience** + Experience introducing and scaling AI-driven developer tools within teams. + Track record of transforming legacy systems to cloud-native, event-driven architectures. + Demonstrated success in mentoring, coaching, and upskilling engineering teams. + Experience working in large, distributed enterprise environments. **What You Will Bring:** + Bachelor’s degree in Computer Science, Engineering, or a related field (BS/BA preferred). + Fully bilingual: must speak, read, and write in both Spanish and English. + The role is based in Mexico City. No relocation is offered. This position is hybrid; you may be expected to go into the office 1–2 days per week. **Why Join Us?** + Be part of a pioneering team impacting AT&T’s US business customers from Mexico City. + Work on strategic, high-impact projects that shape the future of telecommunications software. + Collaborate with talented professionals in an inclusive, innovative, and growth-oriented environment. + Opportunity for continuous learning and career advancement within a global telecommunications leader. Our Principal Software Engineer earns between $130,000 – $195,000 MXN gross monthly. Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on experience, expertise, and education/training.  **Joining our team comes with amazing perks and benefits:** + Life Insurance + Major Medical Expenses + Minor Medical Expenses + Monthly Grocery Vouchers: MXN $3,146 + Monthly Restaurant Vouchers: MXN $2,517 + Savings Fund + 30 days of Christmas Bonus + Annual Performance Bonus: Up to 13% of base salary + Employee discounts up to 50% off on eligible AT&T mobility plans and accessories **Ready to join our team? Apply today!** **Weekly Hours:** 40 **Time Type:** Regular **Location:** Naucalpan De Juarez, Estado de Mexico, Mexico It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made. AT&T will consider for employment qualified applicants in a manner consistent with the requirements of federal, state and local laws We expect employees to be honest, trustworthy, and operate with integrity. Discrimination and all unlawful harassment (including sexual harassment) in employment is not tolerated. We encourage success based on our individual merits and abilities without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, disability, marital status, citizenship status, military status, protected veteran status or employment status