Company Details
Technology Stack
Professional Summary
Rosario Leo is Chief Technology Officer at Truecaller. Truecaller operates in the information technology & services industry and has 420 employees. Based in Solna, Stockholm County, Sweden. Classified as a c-suite-level CTO leader. Their organization's technology stack includes CloudFlare CDN, Sendgrid, Gmail, Google Apps, Microsoft Office 365, and 32 other technologies. Truecaller reports annual revenue of 169581000.
Position in the CTO Rank Database
- • Typical CTO compensation in Stockholm County: $250,000 – $650,000 (median $420,000). Composite from levels.fyi, Glassdoor, and Payscale data; adjusted for state cost of labor.
Data compiled from LinkedIn public profiles, company filings, and verified public technology signals. Methodology & sources · Updated June 2026.
Frequently Asked Questions
How do I contact Rosario Leo?
Rosario Leo has a verified email address on file on CTO Rank. They work at Truecaller. Pro members can access direct email addresses, LinkedIn profiles, and phone numbers.
What company does Rosario Leo work for?
Rosario Leo is Chief Technology Officer at Truecaller, a company in the information technology & services industry with 420 employees. The company is headquartered in Stockholms laen, Sweden.
What is Rosario Leo's role in technology leadership?
Rosario Leo is classified as a CTO leader at the c-suite level.
What technologies does Rosario Leo's organization use?
Rosario Leo's organization uses a technology stack that includes CloudFlare CDN, Sendgrid, Gmail, Google Apps, Microsoft Office 365, Amazon AWS. This information is useful for sales teams, recruiters, and technology vendors.
Is Rosario Leo open to recruiting or new opportunities?
CTO Rank does not track open-to-work status. The best approach is to reach out directly to Rosario Leo using the verified contact information available to Pro members. When recruiting a Chief Technology Officer, personalizing your outreach with specifics about the role and tech stack typically yields the best response rate.
Can I pitch or sell to Rosario Leo at Truecaller?
Rosario Leo is Chief Technology Officer at Truecaller. CTOs like Rosario Leo typically evaluate vendors in CloudFlare CDN, Sendgrid, Gmail, and related categories. Use CTO Rank Pro to get verified email and approach directly.
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