A senior software engineer should possess advanced programming and problem-solving skills, in-depth knowledge of software architecture and design patterns, strong communication and teamwork abilities, and expertise in project management and leadership. They must also stay current with industry trends and emerging technologies, while demonstrating a consistent track record of delivering high-quality software solutions. If you are interested in getting into this field, then check out this video about Aman Singh and how he promoted to a Senior Software Engineer role with a good salary hike just after completing Intellipaat's Data Analyst training course.