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ION Tech Stack

Trading and workflow automation software for financial institutions and governments

Software Development London 10,001+ employees Founded 1998 Privately Held

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.

Tech Stack 200 technologies

Core StackLinux PL/SQL C# C++ Java JavaScript TypeScript Python Scala Windows Server Active Directory Ansible Jira VMware Hyper-V React Microsoft Office Word Excel PowerPoint Unix SQL Windows Citrix PowerShell SNMP Nagios HPE OneView Remedy IT Service Management HPE Primera+170 more

What ION Is Building

Challenges

  • Maintaining high availability
  • Remediation of information security vulnerabilities
  • Reducing business process complexity
  • Increasing organizational efficiency through automation
  • Capacity planning
  • Integration of newly acquired companies
  • Managing due diligence projects
  • High-volume billing
  • Continuous improvement of vulnerability management
  • Improving ap processes

Active Projects

  • Disrupting the way our customers operate in financial markets
  • Ion solution implementation
  • Integration of newly acquired companies into the sales process
  • Endur implementation
  • Disrupting financial markets operations
  • Vulnerability management process
  • Design system
  • Reputational due diligence projects
  • Upgrade implementation analysis
  • Introducing solutions to improve customer workflows

Hiring Activity

Minimal340 roles · 35 in 30d

Department

Engineering
139
Support
35
Data
22
Finance
20
Ops
18
Sales
17
Security
15
Product
13

Seniority

Senior
143
Mid
87
Junior
66
Principal
14
Manager
10
Lead
8
Intern
3
Director
2

Notable leadership hires: Account Director, Tech Lead

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About ION

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.

HeadquartersLondon
Company Size10,001+ employees
Founded1998
Hiring MarketsItaly, India, United Kingdom, Spain, United States, Hungary, Moldova, Canada

Frequently Asked Questions

What is ION's tech stack?

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.

Where does ION hire?

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.

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