Trading and workflow automation software for financial institutions and governments
ION is a 10,000+ person financial software vendor built on a deep stack (Java, C#, C++, SQL, Python, Scala) with heavy reliance on legacy enterprise infrastructure (Windows Server, Active Directory, Citrix, VMware). The company is adopting Microsoft's Power Platform while managing a complex M&A integration workload across newly acquired businesses. Engineering-heavy hiring (139 roles) paired with acute pain points around high availability, information security remediation, and organizational complexity suggests ION is at scale—managing established mission-critical systems while modernizing through platform consolidation.
Notable leadership hires: Account Director, Tech Lead
ION delivers mission-critical software for trading, workflow automation, and financial operations to financial institutions, corporations, central banks, and governments. Founded in 1998 and headquartered in London, the company operates at significant scale with 10,001+ employees across 18+ hiring countries including the United States, United Kingdom, India, and continental Europe. The product suite spans implementation services (Endur implementations, solution deployments), core trading and operations software, and an expanding workflow automation practice. Recent focus areas include design system work, vulnerability management process hardening, and integration of acquired companies into sales and delivery operations.
ION runs on Java, C#, C++, SQL, PL/SQL, Python, Scala, and JavaScript. Infrastructure includes Windows Server, Linux, Unix, Active Directory, Citrix, VMware, and HPE storage. Monitoring uses Nagios; ticketing and service management through Jira and Remedy. Now adopting Microsoft Power Platform.
ION recruits across 18 countries: United Kingdom, United States, India, Italy, Spain, Hungary, Moldova, Canada, Mexico, France, South Korea, Ireland, China, Germany, Austria, Singapore, United Arab Emirates, Brazil, and Japan.
Other companies in the same industry, closest in size