Karthikeyan — Made to Last since 1990
13+
Years in Software
6
Companies
5
Ventures
6
Domains
What's New
New
Eurocas Madurai is Live
Karthik's newest venture — Eurocas Madurai connects aspiring students and professionals from Madurai to opportunities in Germany. Offering guidance for German courses, Ausbildung, nursing, and physiotherapy pathways.
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Karthikeyan Varadarajan

Karthikeyan Varadarajan (Karthik)

Senior Architect at Digital Charging Solutions

13+ years in the software industry with hands-on full stack development and 4+ years leading high-performance teams of 8-10 developers. Certified Technical Product Owner (PSPO I) and Engineering Lead with deep experience in the EV industry. Expert in automating and migrating legacy systems, internalizing knowledge and resources. Passionate about highly scalable software design, architecture, and flawless customer support. Serial entrepreneur building businesses across Germany and India.

Berlin, Germany

B.Tech, Information Technology — SASTRA University, Tanjore (2008-2012)

Ventures
Career
2021 - Present
Digital Charging Solutions
Senior Architect
Technical ownership of mail service (Mailjet), content management (Lokalise), CRM (Emarsys), and customer service (Zendesk). New market rollouts of Charge Now (B2C), Charge Now for Business (B2B), and OEM white-label solutions. Responsible for 1.5M+ emails/month quality. Driving full automation, legacy migration, and hiring senior developers.
Berlin, Germany
2019 - 2021
ZF Group (Iomoto)
Software Engineering Lead / Senior Full Stack Engineer
Developed blockchain-based services for secure machine-to-machine transactions. Automated seamless fueling, parking, toll payments, and insurance. B2B model connecting car fleets with service providers. Expanded to trucks and bus fleets.
Berlin, Germany
2018 - 2019
LucaNet AG
Professional Java Developer
Built on-demand feature build systems, Docker-based QA environments reducing effort manyfold, Gradle 5 migration of monolithic codebase, Groovy mail library for Jenkins, IntelliJ plugins, and RESTful microservices.
Berlin, Germany
2017 - 2018
YuMe by RhythmOne
Server Software Engineer L2
Managed RESTful microservices and Angular frontends for ad network platform (YFN). Developed ehcache and RTB transaction services handling millions of requests per second across Tomcat, Netty, Jetty, and Nginx.
Chennai, India
2014 - 2017
Symantec Corporation
Software Development Engineer
RESTful webservices for cross-application data transfer, Norton release management as DevOps engineer, and Norton web portal as full stack developer building features and fixing defects.
Chennai, India
2012 - 2014
Tata Consultancy Services
Software Engineer
Enterprise automation team — developed frameworks, wrappers, and libraries for functional and UI automation using Java, Selenium, C#, and VBA.
Chennai, India
Industry Domains
EV Charging
Digital Charging Solutions
Blockchain & Automotive
ZF Group
Finance & ERP
LucaNet AG
AdTech
YuMe / RhythmOne
Cybersecurity
Symantec Corporation
Healthcare
TCS
Core Skills
Legacy Systems Migration Software Automation Azure Solutions Architect Technical Product Ownership Team Leadership (8-10 devs) Scalable Software Design Partner Integration Stakeholder Management
Tech Stack
Angular React TypeScript JavaScript HTML5 / CSS3 Redux Microfrontends Java Spring Boot C# .NET Microservices RESTful APIs Docker Kubernetes Terraform Azure CI/CD Jenkins PostgreSQL MySQL MongoDB RabbitMQ Grafana Prometheus
Certifications
Professional Scrum Product Owner I (PSPO I) ISTQB Certified Business Process Management Microsoft Student Partner
Languages
Tamil — Native English — Native German — Elementary
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