Summary
Overview
Work History
Education
Skills
Websites
Certification
Timeline
Core Competencies
Generic

Felix Rajappan

Groton,MA

Summary

Strategic technology leader with over 19 years of experience driving software development, solution architecture, and digital-transformation initiatives across global enterprise environments. Proven success in leading high-performing engineering teams, defining technology roadmaps, and aligning solutions with business strategy and organizational goals. Expert in the Microsoft .NET ecosystem, Python, enterprise architecture, cloud modernization (AWS/Azure), and agile delivery frameworks. Adept at managing full SDLC delivery of mission-critical financial and compliance systems with focus on scalability, performance, and regulatory compliance.

Overview

19
19
years of professional experience
1
1
Certification

Work History

Solution Architect – Tax Solutions

S&P Global
04.2021 - Current
  • Led troubleshooting and optimization of agentic workflows, identifying and resolving issues related to:

    Prompt chaining failures and reasoning breakdowns
    Tool invocation errors and API integration gaps
    Context window limitations and memory inconsistencies
    Latency, cost inefficiencies, and scaling bottlenecks
    Observability gaps using logging, tracing, and evaluation frameworks Lead engineering teams on strategic initiatives, evaluating emerging technologies and crafting hands-on proof-of-concepts to deliver highly available, resilient solutions using Kubernetes.
  • Influence product roadmaps by providing architectural direction in collaboration with Squad Leaders and Product Area Leaders.
  • Architected an AI Enablement Platform delivering reusable capabilities such as Model Enablement, LLM Batch Services, and Conversational AI.
  • Designed and implemented Ontology-driven AI frameworks, enabling structured knowledge representation, semantic search, and improved reasoning across enterprise datasets.

Senior . NET Developer / Team Lead – §871(m) Compliance Tool

S&P Global
03.2016 - 03.2021
  • Led development of UI and backend services for compliance automation; guided team of developers and QA engineers.
  • Built responsive interfaces using Bootstrap and Telerik UI for Blazor.
  • Developed asynchronous RESTful APIs and WCF Services to enhance data-access performance.
  • Implemented SSO, single-session management, and Serilog logging for audit compliance.
  • Produced SSRS reports for compliance tracking and business insights.
  • Environment: .NET 4.0, C#, SQL Server 2012, LINQ, TFS, ADO.NET, ASP.NET

. NET Developer – CTI Compliance (E-W8)

SGS Technologies
03.2014 - 03.2016
  • Enhanced electronic IRS tax-form solution; implemented encryption for sensitive data.
  • Delivered performance tuning and optimized long-running SQL queries.
  • Supported client deployments and production issue resolution.
  • Environment: .NET 4.0, C#, SQL Server 2008, LINQ, TFS, ADO.NET, ASP.NET

Sr. . NET Developer / Onsite Lead / Team Lead

Infosys Technologies Ltd. – Bank of America Client Engagements
01.2007 - 02.2014
  • Key Contributions
  • Delivered multiple large-scale systems including Unified Security Framework, Global Fulfillment Service, and Global Underwriting System.
  • Designed and developed enterprise applications using WPF (MVVM), ASP.NET, WCF, and SSIS.
  • Conducted impact analysis, HLD/LLD documentation, and production deployments.
  • Tuned application performance using SQL Profiler and VSTS load testing.
  • Coordinated onshore/offshore teams and ensured adherence to SDLC and Agile principles.
  • Environment: .NET 3.5–4.0, C#, WPF, WCF, SQL Server, Oracle, TFS, SSRS, SSIS, CAB, Enterprise Library

Education

Master of Science - Data Science

Merrimack College
North Andover, MA
05.2025

Bachelor of Engineering - Electronics & Communication Engineering

India
05.2006

Skills

  • Languages & Frameworks: Python,C#, NET (Core & Framework), ASPNET, WCF, LINQ, Entity Framework, Blazor, WPF (MVVM)
  • Databases: SQL Server, Postgres
  • Cloud Platforms: AWS,Azure
  • Tools & DevOps: TFS, Github, Jenkins, CI/CD Pipelines, SonarQube, Serilog
  • Methodologies: Agile / Scrum, SDLC, Architecture Governance, Code Review & Quality Management

Websites

Certification

AZ-900 Microsoft Azure Fundamentals

Timeline

Solution Architect – Tax Solutions

S&P Global
04.2021 - Current

Senior . NET Developer / Team Lead – §871(m) Compliance Tool

S&P Global
03.2016 - 03.2021

. NET Developer – CTI Compliance (E-W8)

SGS Technologies
03.2014 - 03.2016

Sr. . NET Developer / Onsite Lead / Team Lead

Infosys Technologies Ltd. – Bank of America Client Engagements
01.2007 - 02.2014

Master of Science - Data Science

Merrimack College

Bachelor of Engineering - Electronics & Communication Engineering

Core Competencies

  • Cross-Functional Leadership & Team Mentorship
  • Enterprise Software Architecture & Modernization
  • .NET Core & C# Application Development Oversight
  • RESTful API Design & Systems Integration
  • SQL Server Performance Tuning & Database Optimization
  • Compliance, Security & Regulatory Standards
  • Strategic Roadmapping & Business–Technology Collaboration
  • Foundational Knowledge in Data Science & Analytics
Felix Rajappan