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Raj Kumar Rai has a diverse work experience spanning over several years. Raj Kumar is currently working at Freeletics as a Lead Data Engineer since November 2023. Prior to this, they worked at Atos Syntel as a Senior Data Engineer from July 2021 to November 2023. Raj also has experience as a Big Data Architect at Atos Syntel from July 2015 to July 2021. Before that, they held the role of Manager at Iyogi Technical Services Pvt LTD from October 2014 to July 2015. Raj began their career at HCL Technologies as an Associate Project Manager from November 2010 to October 2014. Raj Kumar worked as a DBA at Nivio from September 2008 to November 2010 and at NIIT Technologies Limited from March 2007 to September 2008. Raj's early experience includes the role of a Database Programmer at Greenfield Online from September 2005 to March 2007.

Raj Kumar Rai obtained a Master of Computer Applications (MCA) degree in Information Technology from Maharshi Dayanand University from 2005 to 2007. Prior to that, they earned a Bachelor of Information Systems (Hons.) degree in IT from Guru Gobind Singh Indraprastha University from 2001 to 2004. Additionally, Raj has obtained several certifications, including AWS Certified Data Analytics Specialty in 2023 from Udemy, AWS Cloud Technical Essentials in 2022 from Coursera, and the Project Management Professional (PMP) certification from the Project Management Institute in 2012.