C3S Software helps US companies scale their engineering teams without the overhead, risk, or long-term commitments of traditional hiring. Founded in 2015 by Curtis Zweier in Philadelphia, we've spent 11 years placing senior engineers inside product and technology teams across 15+ industries — from fintech and healthtech to SaaS and enterprise software. What makes us different: -300+ engineers placed with a 0% turnover rate in 2025 -AI agents running in production for enterprise clients today -Dedicated PM included at no cost on every engagement -No long contracts — clients can walk away with weeks of notice -Senior-only talent — top 5% of applicants make the cut Whether you need a single embedded engineer or a full managed team, we move fast. Most clients have engineers on the ground within 2 weeks. Services: AI Engineering · Staff Augmentation · Managed Engineering Teams · Product Engineering · Cloud & DevOps · Application Modernization · QA Automation 📅 Book a call: calendly.com/pdonovan-c3s/30min 🌐 c3sservices.com
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Curtis Zweier is the Founder of c3s Software.
39 people are employed at c3s Software.
c3s Software is based in Glen Mills, Pennsylvania.