Senior Full Stack Developer - TypeScript/.NET

MANDEEP SINGH

SENIOR FULL STACK SOFTWARE DEVELOPER

TypeScript Angular React Node.js C# .NET Azure REST APIs Microservices

+1-249-***-**** ************@*****.*** https://www.linkedin.com/in/mandeepjandoria https://mandeepjandoria.github.io PROFESSIONAL SUMMARY

Senior Full Stack Software Developer with 11+ years of experience designing, building, and delivering scalable enterprise web applications using TypeScript, Angular, React, Node.js, C#, and .NET across travel, healthcare, financial services, and insurance domains. Proven track record designing REST APIs and microservices, building cloud-based solutions on Azure, and automating application delivery through Azure DevOps CI/CD pipelines in Agile/Scrum environments, delivering secure, accessible

(WCAG/AODA/ADA), and scalable platforms. Hands-on experience building AI-powered features, including a Retrieval- Augmented Generation (RAG) chatbot using the OpenAI API, Node.js, and TypeScript for semantic document search and AI- assisted question answering.

CORE TECHNICAL SKILLS

Languages: TypeScript, JavaScript, C#

Frontend: Angular, React.js, HTML5, CSS3, NgRx, Redux, Tailwind, Bootstrap Backend: Node.js, .NET, .NET Core, ASP.NET Core, MVC, Web API, REST APIs, SOAP APIs, Entity Framework, Microservices Cloud & DevOps: Azure (App Service, Functions, Key Vault, Monitor, Application Insights), Azure DevOps, AWS, Jenkins, SonarQube, Git, CI/CD

Databases: SQL Server, Oracle, MySQL, MongoDB, DynamoDB AI & Automation: OpenAI API, Retrieval-Augmented Generation (RAG), Prompt Engineering, LLM Integration, Claude Code Analytics & Testing: Mixpanel, Power BI, Tableau, SSIS, MSTest, JUnit, Postman, SoapUI, TDD Platforms & CMS: ServiceNow, Salesforce, SharePoint, Umbraco CMS Methodologies & Compliance: Agile, Scrum, Kanban, WCAG, AODA, FIPPA, ADA CAREER HIGHLIGHTS

● 11+ years delivering enterprise-scale full stack applications across travel, healthcare, financial services, and insurance, combining Angular/React front ends with .NET Core, C#, and Node.js back ends.

● Automated deployment and configuration management using Azure DevOps CI/CD pipelines, Azure App Service, Azure Functions, and Azure Key Vault, improving release velocity and security posture across multiple platforms.

● Resolved production-critical integration failures across legacy SOAP, GDS, and third-party accounting systems, protecting financial reporting integrity for enterprise clients.

● Delivered software compliant with AODA, FIPPA, and ADA accessibility and privacy standards across healthcare, insurance, and travel platforms in Canada and the U.S.

● Mentored developers and established front-end and API best practices, improving code quality, onboarding speed, and release consistency across cross-functional teams. PROFESSIONAL EXPERIENCE

Senior Software Developer TripArc — Agent Digital Experience Toronto, ON 03/2023 – Present B2B travel platform serving thousands of travel agents across North America Tech Stack: Angular, TypeScript, .NET Core, C#, Node.js, REST APIs, SQL Server, Azure App Service, Azure Functions, Azure Key Vault, Azure DevOps, Mixpanel, Microservices

● Architected and delivered insurance booking workflows within ADX, integrating third-party APIs into the Travel Services platform to enable agents to quote and manage insurance products within travel packages.

● Led development of the Plus Bundles feature, enabling agents to package flights, hotels, activities, and transport into a single sellable offering with commission, markup, and validation logic.

● Owned the Make Payable lifecycle across booking, invoicing, payments, and document generation, resolving long- standing inconsistencies between internal booking systems and client payment portals.

● Built Node.js services supporting internal automation workflows and REST API integrations.

● Built a Retrieval-Augmented Generation (RAG) chatbot using the OpenAI API, Node.js, and TypeScript, designing session and context management to deliver consistent, context-aware responses for semantic document search and AI- assisted Q&A.

● Collaborated with architects and cross-functional teams to design scalable service workflows, integration patterns, and front-end architecture for enterprise booking and payment systems.

● Resolved production-critical TramsCore accounting integration failures impacting commission reconciliation and financial reporting accuracy across multiple agency clients.

● Drove Mixpanel analytics instrumentation across 6+ core agent workflows within 2-week sprint cycles, defining event taxonomies, funnel stages, and KPI dashboards to surface feature adoption and booking conversion behavior.

● Built the Target Margin feature, a real-time profitability engine factoring commissions, costs, and markups to enforce per-booking margin thresholds.

● Managed application secrets, certificates, and secure configuration using Azure Key Vault, improving security and compliance across environments.

● Monitored application performance and production health using Azure Monitor and Application Insights, troubleshooting incidents and improving system reliability.

● Led Angular modernization initiatives across the ADX platform, improving maintainability and build performance while ensuring zero regression across booking and payment workflows.

● Mentored intermediate and junior developers through code reviews and design discussions, establishing front-end and API best practices that improved code quality and accelerated onboarding. Consultant — Full Stack Developer CGI (Client: PSP Investments) Mississauga, ON 05/2022 – 03/2023 Market data subscription and publishing platform supporting investment decision-making Tech Stack: ASP.NET, C#, Node.js, TypeScript, REST APIs, JWT, OAuth 2.0, SQL Server, Azure App Service, Azure Functions, Azure DevOps, VMware vRA

● Designed and implemented secure RESTful APIs with dual-layer authentication (JWT + OAuth 2.0), enforcing role-based access control and protecting sensitive investment market data against unauthorized access.

● Re-architected the VMware vRealize Automation (vRA) DevOps platform, automating environment provisioning through reusable infrastructure templates and significantly reducing setup time for development and testing environments.

● Delivered back-end services using ASP.NET, SQL Server, Node.js, TypeScript, and Azure DevOps CI/CD pipelines with a zero missed release record throughout the engagement.

● Implemented event-driven backend workflows and developed automation utilities using Node.js.

● Established team-wide code review practices and quality gates, improving code consistency and reducing post-release defects across a 5+ developer team.

● Implemented and maintained end-to-end monitoring for cloud applications using Azure Monitor and Application Insights, enabling rapid incident response and root cause analysis.

● Served as the primary technical point of contact for PSP Investments, translating complex financial data and compliance requirements into well-structured, auditable back-end solutions. Software Developer ClaimSecure Inc. Sudbury, ON 10/2020 – 05/2022 Member eProfile Modernization & Automated Testing — healthcare claims and payments platform Tech Stack: Angular, NgRx, TypeScript, .NET Core, C#, Node.js, Umbraco CMS (v7.15), SharePoint, SOAP APIs, SQL Server, ServiceNow, JUnit

● Developed and maintained content-managed web pages and reusable components using Umbraco CMS (v7.15) and SharePoint, building document types, templates, and content workflows that enabled non-technical teams to manage member-facing content without developer involvement.

● Led modernization of a large-scale healthcare claims platform using Angular and NgRx, implementing scalable Redux- pattern state management that improved UI predictability and reduced state-related production defects.

● Modernized legacy SOAP integrations, replacing 3+ legacy integrations and improving the maintainability and scalability of claims submission and payment tracking workflows used by thousands of plan members.

● Ensured compliance with AODA accessibility standards (front end) and Ontario's FIPPA privacy legislation (back end), embedding requirements directly into the development workflow using .NET Core and C#.

● Built reusable TypeScript components and scalable Angular architecture following enterprise front-end best practices, improving application maintainability through modular, reusable patterns.

● Developed internal automation services using Node.js to streamline operational workflows.

● Optimized high-frequency healthcare claims queries through execution-plan analysis, indexing strategies, and SQL tuning, reducing average response times by an estimated 30–40%.

● Designed and automated ServiceNow incident workflows using Flow Designer, streamlining request handling and contributing to a reduction in average SLA resolution time.

● Built automated unit test suites and JUnit regression tests covering 40+ test cases for the UAT team, increasing test coverage and reducing manual QA effort across release cycles.

● Mentored junior developers on Angular, NgRx, and .NET Core development through code reviews and knowledge- sharing sessions.

Software Engineer United Health Group Tampa, FL 04/2017 – 08/2019 US Markets Global Insurance — healthcare claims, profile management, and payments platform Tech Stack: Angular 7, .NET Core, C#, Web APIs, Oracle DB, SQL, SSIS, TDD

● Developed ADA-compliant, responsive front-end interfaces using Angular 7, HTML5, and CSS serving a large base of end users and healthcare providers, paired with back-end logic in .NET Core, Web APIs, and Oracle DB.

● Optimized high-traffic Oracle DB queries through execution-plan analysis, indexing strategies, and stored procedure enhancements, improving response times by an estimated 25–35%.

● Provided L3 production support for enterprise healthcare applications within a 24/7 Agile Kanban environment, performing root-cause analysis and deploying hotfixes to maintain platform reliability and operational continuity.

● Applied TDD across feature development to ensure reusable, regression-safe code; automated 5+ recurring manual data processing workflows using SSIS ETL packages, reducing operational overhead and improving pipeline reliability.

● Delivered full-cycle feature development — impact analysis, design, development, and unit testing — across 10+ feature releases within a structured Agile Kanban workflow. Senior Systems Engineer Infosys Limited (Clients: Medtronic & Starbucks) Jaipur, IN 07/2014 – 04/2017 Enterprise application development across medical device and retail domains Tech Stack: Angular, .NET MVC, ASP.NET, JavaScript, HTML5, SQL Server, Jenkins, JIRA

● Contributed to full-stack feature development for 2 enterprise clients (Medtronic and Starbucks) using .NET MVC, HTML5, JavaScript, and SQL Server, building against client specifications within structured Agile delivery cycles.

● Upgraded legacy front-end modules to Angular 5 and integrated partial views into ASP.NET MVC, reducing page load complexity and improving application responsiveness for end users.

● Contributed to 20+ enterprise production releases through Jenkins CI/CD pipelines, strengthening deployment reliability, release coordination, and version-control discipline across distributed Agile teams.

● Wrote automated unit tests for front-end and back-end logic, contributing to early regression detection and a consistent reduction in QA-reported defects across sprint cycles.

● Tracked and resolved 50+ defects in JIRA across 3 years, collaborating with QA and business analysts to triage, prioritize, and close issues within sprint timelines. EDUCATION

Master of Engineering — Software Engineering

Western University, London, ON, Canada Sep 2019 – Aug 2020 Bachelor of Technology — Electrical Engineering

Guru Nanak Dev Engineering College, Ludhiana, PB, India Jul 2010 – Jun 2014

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