Hi, I’m Arul Nagarajan. I’m a Technical Lead and Full-Stack Developer with 13+ years of experience architecting, developing, and delivering enterprise-grade .NET, React/Node, and cloud-native solutions across finance, ERP, AI automation, real estate, payroll, insurance, and telecom domains. I excel at guiding cross-functional teams for high-profile clients in multiple regions and coordinating closely with onsite stakeholders to deliver robust, scalable software. I’m passionate about building automated, webhook-driven systems, integrating external APIs, and delivering high-availability solutions. I thrive in fast-paced environments where collaboration with product, design, and operations is essential to drive value and ensure smooth hosting and deployments for mission-critical applications.

ARUL NAGARAJAN

Hi, I’m Arul Nagarajan. I’m a Technical Lead and Full-Stack Developer with 13+ years of experience architecting, developing, and delivering enterprise-grade .NET, React/Node, and cloud-native solutions across finance, ERP, AI automation, real estate, payroll, insurance, and telecom domains. I excel at guiding cross-functional teams for high-profile clients in multiple regions and coordinating closely with onsite stakeholders to deliver robust, scalable software. I’m passionate about building automated, webhook-driven systems, integrating external APIs, and delivering high-availability solutions. I thrive in fast-paced environments where collaboration with product, design, and operations is essential to drive value and ensure smooth hosting and deployments for mission-critical applications.

Available to hire

Hi, I’m Arul Nagarajan. I’m a Technical Lead and Full-Stack Developer with 13+ years of experience architecting, developing, and delivering enterprise-grade .NET, React/Node, and cloud-native solutions across finance, ERP, AI automation, real estate, payroll, insurance, and telecom domains. I excel at guiding cross-functional teams for high-profile clients in multiple regions and coordinating closely with onsite stakeholders to deliver robust, scalable software.
I’m passionate about building automated, webhook-driven systems, integrating external APIs, and delivering high-availability solutions. I thrive in fast-paced environments where collaboration with product, design, and operations is essential to drive value and ensure smooth hosting and deployments for mission-critical applications.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Technical Lead / Senior Developer at Calnetic
May 1, 2023 - November 21, 2025
Technical Lead / Senior Developer responsible for full-stack development and maintenance of websites, APIs, and Windows services. Led integration with external APIs, webhook-based systems, and automated background services for notifications, data synchronization, and payment verification. Managed hosting and deployments for high-availability systems and integrated GoHighLevel, OnceHub, ActiveCampaign, and Heymarket for user management. Engaged in feature delivery and production support across Services, .NET Web API, Windows Services, and MS SQL.
Technical Lead / Senior Developer at NOL (North Online)
April 30, 2023 - April 30, 2023
Technical Lead / Senior Developer for AMP Australia (Insurance, Home Loan, Investment). Designed and developed web services, UI, and database logic; implemented .NET Core, Azure APIs, React MVC; built Azure-based cloud services and DevOps workflow; integrated OAuth2, Postman, and third-party APIs for automation and scalability.
Senior Developer / Technical Lead at TeleApps India Pvt Ltd
December 31, 2021 - December 31, 2021
Led multiple client projects including Emirates NBD Transaction Manager and other government/enterprise deployments. Responsibilities included team leadership, API design and development, MVC/React UI, business and data logic, documentation, and bug fixes. Coordinated with clients for requirements, delivered code, and ensured quality across Windows/Web platforms.
Senior Developer at Plintron
March 31, 2015 - March 31, 2015
Worked on My Accounts-Customer web portal for Lyca Mobile UK. Roles included DB design, API design, and backend development using ASP.NET MVC, XML/JavaScript, and cloud APIs. Contributed to REST API creation and backend logic to support telecom services.
Developer at Sriram Financial Company
October 31, 2013 - October 31, 2013
Worked on customer portal for SHFL including My Accounts, Jeweller Finance, and related modules. Responsibilities covered application and data logic development, loan and repayment workflows, and reporting. Engaged in DB design, API design, and maintenance.

Education

BCA at Alagappa University, Karaikudi, TN, India
January 1, 2007 - January 1, 2010
MCA at Bharathidasan University, Trichy, TN, India
January 1, 2010 - January 1, 2012

Qualifications

486 - Developing ASP.NET MVC Web Applications
January 11, 2030 - November 21, 2025
483 - Programming in C#
January 11, 2030 - November 21, 2025
480 - Programming in HTML5 with JavaScript and CSS
January 11, 2030 - November 21, 2025

Industry Experience

Software & Internet, Financial Services, Telecommunications, Professional Services, Real Estate & Construction, Media & Entertainment