2 days ago
Base Salary
$180k - $200k/yr
Responsibilities
- Support, maintain, troubleshoot, and improve enterprise applications built using Microsoft WCF.
- Analyze WCF services, configurations, endpoints, bindings, communication patterns, service contracts, client calls, and API signatures.
- Investigate production issues including timeouts, communication failures, startup delays, resource utilization problems, and performance bottlenecks.
- Conduct root-cause analysis across distributed applications and address underlying causes rather than temporary symptoms.
- Analyze full-duplex WCF channels, callback mechanisms, and WPF-to-WCF communication workflows.
- Reverse-engineer undocumented system behavior and document platform architecture, service relationships, operational practices, and known issues.
- Identify low-risk opportunities to improve reliability, performance, maintainability, and operational stability.
- Evaluate recurring service restarts and determine whether their causes involve design, configuration, code, resource utilization, or operational practices.
- Implement incremental, well-tested improvements and contribute to modernization initiatives.
- Use AI-assisted tools for code analysis, investigation, documentation, testing, and knowledge discovery.
Requirements
- 8+ years of experience developing, supporting, and troubleshooting enterprise Microsoft .NET applications.
- Deep hands-on experience with Windows Communication Foundation (WCF).
- Strong knowledge of service contracts, data contracts, operation contracts, endpoints, bindings, client proxies, service configuration, and API signatures.
- Experience troubleshooting and optimizing complex WCF environments.
- Expertise diagnosing timeout exceptions, service startup issues, communication failures, memory and resource utilization problems, performance bottlenecks, and production stability concerns.
- Experience with full-duplex WCF communication and callback contracts.
- Experience supporting WPF applications that consume WCF services.
- Strong root-cause analysis, investigative troubleshooting, technical documentation, problem-solving, analytical, and communication skills.
- Experience with large, long-lived enterprise applications and legacy technology platforms.
- Demonstrated ability to reverse-engineer existing systems and understand undocumented behaviors.
- Ability to collaborate with developers, architects, support teams, and business stakeholders.
- Preferred experience modernizing or migrating legacy WCF applications and working with both .NET Framework and modern .NET platforms.
- Preferred experience with REST APIs, service modernization initiatives, application monitoring and diagnostics tools, Agile delivery teams, and financial services or other highly regulated environments.
- Preferred experience using GitHub Copilot, Claude Code, Cursor, ChatGPT, or similar AI-assisted engineering tools.
Tech Stack
.NET
Categories
About ION Group
ION Group builds enterprise software for trading, treasury, and risk management used by banks, asset managers, corporations, and public-sector institutions. Its portfolio spans order and execution management, market data, and workflow automation delivered as licensed software and SaaS. Founded in 1998 and headquartered in London, the privately held company has expanded globally through acquisitions, including Fidessa, across fixed income, FX, derivatives, commodities, and treasury.