SUMIT KUMAR SINGH
BANGALORE
Summary
Over 13 years 10 Months of experience in IT application development and the software delivery lifecycle. Passionate about delivering customer value through continuous learning and implementation of modern tools and technologies. Energetic, proactive, analytical, and results-driven team player who thrives on challenges.
Overview
14
14
years of professional experience
3
3
Certifications
Work History
Associate Consultant
TCS
01.2019 - Current
- Implemented Canary Deployments using Flagger/Istio to validate new releases with real user traffic, troubleshoot canary rollout issues, and optimized rollback/promotion strategies.
- Performed Kubernetes cluster capacity planning by analyzing resource utilization (CPU, memory, node scaling), ensuring workloads were scheduled efficiently and preventing resource bottlenecks.
- Configured and optimized health probes (liveness, readiness, startup) to ensure application reliability, minimizing false restarts and preventing downtime during rolling deployments.
- Worked with Istio service mesh components (Istiod, VirtualServices, DestinationRules) to enable traffic routing, observability, and fault injection for microservices in production.
- Improved microservice reliability by configuring Istio VirtualServices with advanced traffic-splitting, mutual TLS, and fault injection, enabling safer production rollouts and resilience testing.
- Successfully created and maintained an automated CI/CD pipeline for code deployment using Jenkins, Strela, and JFrog Artifactory, automating the build and deployment process, which resulted in the elimination of 70% of manual work and a significant increase in work efficiency.
- Integrated observatory tools like SPLUNK & Grafana for error logging & monitoring
- Client: Credit Suisse Bank/UBS Bank: Jan 2019 – March 2025
- Client: Walmart: April to till date
Senior Engineer Operations
OnMobile Global Limited
11.2015 - 01.2019
- Managed and resolved various incidents to ensure system stability and uptime, including monitoring system performance, diagnosing issues, and implementing timely fixes.
- Collaborated closely with development teams to deploy patches and updates with minimal disruption, and created and maintained documentation for incident responses and standard operating procedures.
- Provided 24/7 on-call support, addressing urgent issues promptly and ensuring service-level agreements (SLAs) were met.
- Hands-on experience with Tomcat, Daemon, Apache, Nginx, and MySQL.
- Deployed, tested, troubleshot, and debugged various infrastructure and cloud technologies during projects.
- Provided L4 of infrastructure support as a part of the L4 Infra support team.
- Experienced with AWS, including creating EC2 instances, S3 buckets, security groups, NACL, and NAT Gateway.
- Performed system maintenance and upgrades, troubleshooting OS and hardware issues.
- Conducted OS patching to optimize vulnerability.
- Managed disk space and file systems using LVM, and performed backup and restore procedures.
- Hands-on experience with chassis/blade server firmware upgrades.
- Troubleshot VMware guest XEN virtualization and Linux OS issues.
- Troubleshot hardware issues and communicated with hardware vendors to replace faulty components.
- Overall, my focus has been on maintaining smooth operations, quickly resolving issues, and continuously improving system reliability and performance.
- Professional Skills (6 Years + Experience)
Senior Engineer SNOC
Vodafone India Limited
11.2014 - 11.2015
- Monitored, managed, and resolved production incidents to minimize downtime.
- Worked with development and IT teams for issue resolution and smooth deployments.
- Maintained incident logs and updated standard operating procedures.
- Hands-on experience deploying Apache, Tomcat, and Daemon in HLR VIEW, NTMS, and USSD Server.
- Experienced in populating ported out numbers during NT HLR Migration.
- Installed licenses to support DLU.
- Upgraded DLU to support new handsets and added new features to existing handsets.
- Handled operations on HLR VIEW (CRM) related to IMEI issues, and Home ISD and ISD-related issues.
- Expanded Workflow license to support 60 TPS load balance on each core.
- Performed daily analysis of customer complaints regarding IMEI missing, and call/SMS barring status mismatches.
- Professional Skills (1 Years' Experience)
Operation Engineer
OnMobile Global Limited
01.2012 - 10.2014
- Managed All the Server from DEV to PROD for windows and Linux based applications
- Successfully managed infrastructure, software and certification upgrade across allenvironments and track/communicate infrastructure downtime to all Stakeholders
- Configured and Monitored the TCO for applications periodically and report if variances aresignificant. Ensure inventory is up to date for application
Education
Engineering -
RGPV University
01.2011
12th Class - undefined
01.2004
10th Class - undefined
01.2002
Skills
- Cloud - Azure Devops , OpenShift & AWS Developer Tools (Basic)
- OS : RHEL , CentOS , Linux , Window Server
- Scripting : Shell scripting , Python & PowerShell
- Visualization : QlikSense (Qlik) & Nprinting
- Webserver and AppServer : Tomcat , nginx , Apache Tomcat & IIS
- DevOps Toolchain: SVN, GIT, TFS, Bitbucket, Jenkins, Strela, Maven, JFrog Artifactory, SonarQube, Sonar & Nexus Report, PowerShell, SNOW, Liquibase
- SCM : SVN & GIT
- Database : MySQL, Maria DB, PostgreSQL & MSSQL
- CM : Salt Stack & Ansible
- Containerization : Dockers , podman
Certification
AWS Certified Cloud Practitioner(Valid until Aug 2025)
Awards
Received Two Award for Key initiative (KPI Scripting using python) and Rising Star in Reward and Recognition Award in OnMobile, Got R&R Award in Vodafone India Limited, Got Excellence Award in TCS in for customer UBS Bank (Credit Suisse), Received Special initiative award in TCS, Received “Best Team Contributor” for customer UBS Bank (Credit Suisse), Received “Technical Excellence” and “RAVE GOLD BAR” awards/recognitions from multiple stake-holders in customer UBS Bank (Credit Suisse)
Disclaimer
I hereby declare that the above-mentioned information is correct to the best of my knowledge and I bear the responsibility for the correctness of the above-mentioned particulars. Place: BANGALORE (SUMIT KUMAR SINGH)
Gap Between: 2004-2007
Please be informed that I have a gap of 3 years and 4 months between completing my 12th in 2004 and starting my engineering in 2007, as I was preparing for engineering during this period
Timeline
Associate Consultant
TCS
01.2019 - Current
Senior Engineer Operations
OnMobile Global Limited
11.2015 - 01.2019
Senior Engineer SNOC
Vodafone India Limited
11.2014 - 11.2015
Operation Engineer
OnMobile Global Limited
01.2012 - 10.2014
12th Class - undefined
10th Class - undefined
Engineering -
RGPV University