Sacha Cohen
Senior Software Engineer · Solutions Engineer & Technical Consultant · 8+ Years of Experience
I design and ship web, SaaS, and blockchain products that hold up in production.
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An engineer who ships, from scoping to production
Senior software engineer with 8+ years of experience building SaaS products, marketplaces, and blockchain solutions. I work freelance and through my own agency, owning everything from technical scoping to production deployment — with a constant focus on quality and outcomes.
Experience
Founded a web agency delivering custom digital solutions: e-commerce platforms, SaaS products, interactive sites. Full project ownership from discovery to deployment.
Scaled a 3D/metaverse marketplace, deployed and maintained Ethereum smart contracts, and cut AWS costs through targeted optimization.
Solo-built "Liora," a medical billing SaaS in live production use across several healthcare centers in Marseille.
Shipped new features and stabilized a SaaS platform used by veterinary clinics.
Led development of an NFT project (Eye-C): public marketplace, API, back-office, and upgradeable ERC20/ERC721 contracts.
Built a confidential SaaS application within a 4-developer team; migrated Symfony 4 to 5.
Built an ERC721 contract for an NFT collection, deployed on Polygon and listed on OpenSea.
Full rebuild of the marketing site and back-office; automated deployment and backup scripts.
Since 2025, I also run independent business ventures (digital coaching, sales) — end-to-end acquisition, closing, and client management.
Technical Skills
Let’s work together
Tell me about your project — I’ll get back to you quickly.