Python Senior Backend Developer

We are looking for a highly skilled Python Senior Backend Developer to join our team and contribute to high-impact initiatives with one of our US-based clients. We’re seeking someone motivated, detail-oriented, and ready to own complex backend challenges. The ideal candidate is a proactive problem-solver who thrives in dynamic, collaborative environments and brings deep expertise in backend development with a strong emphasis on Python. Important Considerations Genuine interest in relocating and living in the United States On-site position in Fremont, California (TN Visa sponsorship provided) Must have Mexican nationality Valid Mexican passport required Bachelor’s degree and professional license (cédula profesional) What You Bring 6+ years of experience building backend systems in Python Demonstrated experience scaling systems to large data volumes and throughput Expert knowledge of REST APIs Experience with microservices or service-oriented architecture and AI agentic workflow Proficiency in Go, Java, C, Python, C#, or other backend language Experience with databases (SQL or NoSQL) Good unit testing and integration testing practices Experience with message queue architecture Proficiency working in a high-impact, responsive, and collaborative team environment Nice to Have Working with open source technologies such as Kafka, Debezium, Elasticsearch, etc Experience with Docker and Kubernetes Knowledge of GraphQL, GRPC, React or any other JavaScript frameworks Experience working in an Agile/SCRUM Software Development Process What You’ll Do Design, develop and support applications and systems under the team’s scope, including vehicle order processing, inventory vehicle purchasing, vehicle delivery experience, Tesla account login, software upgrades, and features accessible through mobile app, etc. Write clean, maintainable, performant, and well-tested code to implement new features and fix bugs. Write unit tests, integration tests, and work with QA to coordinate timely regression for new features Monitor live system metrics, respond to alerts, and troubleshoot production issues. Investigate and understand existing system technical functionality and propose technical improvements. Collaborate with Product, Design, and Business stakeholders to plan and prioritize new feature development. Communicate changes in project estimates, dependencies, and blockers with affected stakeholders quickly. Own feature development and projects through design, development, testing, release and production. Understand and improve the scalability, maintainability, availability, and visibility of applications. Be flexible and quick to respond to changing business priorities and requirements. Document newly implemented technologies and application functionality. Learn new technologies, practices and business concepts to solve new problems as Tesla grows. Work with technologies such as Go, C#, .NET core, MySQL, Elasticsearch, MongoDB, Redis, GraphQL, Python, React, Docker, Kubernetes. About Definity Founded in Monterrey, Mexico, Definity is a nearshore technology partner specializing in custom digital solutions, AI innovation, and business applications. With over two decades of expertise and a strong focus on client success, Definity empowers organizations worldwide to achieve real business results through modern technology. Definity is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, pregnancy, veteran status, or disability status. #J-18808-Ljbffr