2 days ago
Mexico City, MexicoSenior
Base Salary
$180k - $200k/yr
Responsibilities
- Support, maintain, troubleshoot, and improve enterprise applications built with Microsoft WCF.
- Analyze WCF services, configurations, endpoints, bindings, contracts, client calls, API signatures, and communication patterns.
- Investigate production timeouts, communication failures, startup delays, performance bottlenecks, memory issues, and recurring service restarts.
- Perform root-cause analysis across distributed applications and identify underlying design, configuration, coding, resource, or operational problems.
- Support full-duplex WCF channels, callback mechanisms, and WPF applications that consume WCF services.
- Reverse-engineer legacy systems and document platform architecture, service relationships, technical findings, operational behaviors, and known issues.
- Identify low-risk opportunities to improve reliability, performance, maintainability, operational stability, and modernization readiness.
- Reduce technical debt through incremental, validated, and well-tested changes.
- Use AI-assisted tools and modern engineering workflows for code analysis, investigation, documentation, testing, and knowledge discovery.
- Collaborate with developers, architects, support teams, and business stakeholders.
Requirements
- At least 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, including timeout exceptions, startup issues, communication failures, 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, reverse-engineering, technical documentation, analytical, problem-solving, and communication skills.
- Experience working with large, long-lived enterprise applications and legacy technology platforms.
- Ability to identify low-risk optimization and modernization opportunities and collaborate effectively across technical and business teams.
- 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, and regulated financial-services environments.
- Preferred experience leveraging AI-assisted engineering tools such as GitHub Copilot, Claude Code, Cursor, ChatGPT, or similar technologies.
Tech Stack
C#.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.