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ION

Senior Associate Services Specialist

ION

. Support, maintain, and improve enterprise applications built using Microsoft WCF .

Posted 11/10/2026full-timeNew York City • New York • United StatesSenior💰 $180,000 - $200,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive expertise in Microsoft WCF, including service contracts, API signatures, and troubleshooting complex enterprise applications. Proven ability to analyze and optimize performance, conduct root-cause investigations, and support WPF applications that utilize WCF services.

Highest-signal resume keywords
Microsoft WCF ExpertiseRoot-Cause AnalysisPerformance OptimizationTechnical DocumentationWPF Application Support

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Microsoft .NET DevelopmentWCF Service ConfigurationAPI Signature AnalysisTimeout Exception DiagnosisPerformance Bottleneck TroubleshootingFull-Duplex WCF CommunicationCallback ContractsLegacy Technology SupportOptimization Opportunities IdentificationIncremental Change Implementation
Soft Skills
Problem-SolvingAnalytical SkillsCommunication SkillsCollaboration
Tools & Technologies
AI-Assisted ToolsWPF
Industry Keywords
Enterprise ApplicationsService ContractsData ContractsOperation ContractsClient ProxiesOperational StabilityTechnical Debt ReductionModernization Initiatives

Tech Stack

Tools & technologies
WPF.NET

About the role

Key responsibilities & impact
  • Support, maintain, and improve enterprise applications built using Microsoft WCF
  • Analyze WCF services, configurations, endpoints, bindings, and communication patterns
  • Investigate timeout issues, communication failures, startup delays, and performance bottlenecks
  • Diagnose production issues and identify underlying root causes
  • Analyze service functions, client calls, API signatures, and service contracts
  • Work with full-duplex WCF channels and callback mechanisms
  • Support and improve WPF-to-WCF communication workflows
  • Conduct root-cause investigations across distributed applications
  • Analyze service behavior and system interactions to identify unusual patterns, weaknesses, and undocumented functionality
  • Document platform architecture, service relationships, technical findings, operational behaviors, and known issues
  • Identify low-risk improvements to performance, reliability, maintainability, and operational stability
  • Investigate recurring service restarts and determine their technical causes
  • Recommend targeted improvements that reduce operational burden
  • Reduce technical debt through incremental, well-tested changes
  • Contribute to modernization initiatives
  • Use AI-assisted tools for investigation, documentation, testing, and knowledge discovery
  • Promote documentation, validation, testing, and AI-first engineering practices

Requirements

What you’ll need
  • 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
  • Experience 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 and investigative troubleshooting skills
  • Experience with large, long-lived enterprise applications and legacy technology platforms
  • Ability to reverse-engineer existing systems and understand undocumented behaviors
  • Strong technical documentation skills
  • Experience identifying low-risk optimization and modernization opportunities
  • Excellent problem-solving, analytical, and communication skills
  • Ability to collaborate with developers, architects, support teams, and business stakeholders

Benefits

Comp & perks
  • Discretionary bonus based on company and individual performance
  • Supportive and inclusive work environment
  • Equal employment opportunity policy