The Standard Occupational Classification (SOC) code 2139 pertains to "Information Technology and Telecommunications Professionals not elsewhere classified." This category encompasses IT roles that don't fall under more specific classifications. According to the UK's Skilled Worker visa guidelines, eligible job titles under SOC code 2139 include:

IT Specialist
IT Consultant
IT Analyst
IT Project Manager
IT Support Specialist
IT Systems Architect
IT Security Specialist
IT Trainer
IT Service Manager
IT Business Analyst
These roles are recognized as eligible occupations for the Skilled Worker visa, provided they meet the necessary skill and salary thresholds. 
GOV.UK

The general requirements for these positions typically include:

Educational Background: A bachelor's degree in information technology, computer science, or a related field.
Experience: Relevant work experience in the specific IT role.
Skills: Proficiency in relevant technologies, programming languages, and tools; strong problem-solving abilities; effective communication skills.
Certifications: Professional certifications pertinent to the role may be advantageous.
It's essential to ensure that the specific job offer aligns with the criteria set by the Skilled Worker visa, including the appropriate SOC code and meeting the minimum salary requirements