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Senior Software Engineer at Weekday AI. This role is for one of the Weekday's clients. Min Experience: 6 years. Location: London. JobType: full-time. We are seeking a highly skilled and experienced Senior Software Engineer with deep expertise in Python to join our growing engineering team. In this role, you will be responsible for designing, developing, and maintaining scalable, high-performance applications while playing a key role in shaping technical architecture and mentoring junior engineers.. Key Responsibilities. Design, develop, and maintain robust, scalable backend systems and APIs using Python. . Lead end-to-end development of complex software solutions, from concept to deployment. . Write clean, efficient, and reusable code following best practices and coding standards. . Collaborate with cross-functional teams including product managers, designers, and DevOps to deliver high-quality features. . Optimize application performance, reliability, and scalability. . Participate in architectural discussions and contribute to technical decision-making. . Conduct code reviews and ensure adherence to quality standards. . Troubleshoot, debug, and resolve production issues in a timely manner. . Mentor junior developers and contribute to building a strong engineering culture. . Required Skills & Qualifications. 6–11 years of professional software development experience with strong expertise in Python. . Solid understanding of Python frameworks such as Django, Flask, or FastAPI. . Experience in building RESTful APIs and microservices architecture. . Strong knowledge of data structures, algorithms, and object-oriented programming. . Hands-on experience with databases such as PostgreSQL, MySQL, or MongoDB. . Familiarity with asynchronous programming and performance optimization techniques. . Experience with cloud platforms (AWS, GCP, or Azure) and containerization tools like Docker. . Knowledge of CI/CD pipelines and version control systems such as Git. . Strong problem-solving skills and the ability to work in a fast-paced environment. . Preferred Qualifications. Experience working with distributed systems and event-driven architectures. . Exposure to data processing frameworks or background job systems (Celery, Kafka, etc.). . Familiarity with testing frameworks and test-driven development (TDD). . Understanding of security best practices in application development. . Prior experience in leading small teams or projects is a plus. . Soft Skills. Excellent communication and collaboration skills. . Strong ownership mindset with attention to detail. . Ability to work independently and manage multiple priorities. . Passion for learning new technologies and continuous improvement.. Company Location: United Kingdom.