SUMMARY:

• An accomplished IT professional with over 10 years of international experience in software development, system integration, and application support. Led implementation / integration / development / operations support of several large - scale software solutions for Cable / Wireless Carriers and Internet Service Providers across Southeast Asia, Asia Pacific, Middle East and the United States.
• Certified Cloud Application Development/Operations on Amazon Web Services (AWS), AWS Services ( EC2, VPC, S3, RDS, Lambda, API Gateway, SQS, SNS, IAM, Autoscaling, Route 53 ).
• Proven experience in production support of mission-critical systems, 24/7 customer-facing environments, Customer Care, self-care portal, and financial related applications.
• Solid experience in Data Center Infrastructure, rack/server/storage/network/optic installations/configurations/operations, virtualizations, cloud-based environments, PAAS, IAAS, Public/Private Cloud.
• Hands-on experience in supporting large-scale Telecom Billing, CRM, BSS/OSS, Order Management and Orchestration, Provisioning, Mediation, Service Oriented Architecture (SOA), Middleware, Web Service, API, JMS, Microservices and integrations with Confidential, Nokia, Confidential, Alcatel Lucent, Cisco, Oracle, Microsoft, TIBCO, Nortel, Amdocs, ZTE.
• Diverse experience in Business Applications, Custom Applications and Operation Support Systems (CRM, ERP, POS, BSS, OSS, Customer Care, Billing, Insurance).
• Technical expertise in Open Source/.NET technologies such Java, C#, Perl, PHP, OOP, MVC, MVVM, Web Service, API, Unix, Linux, Window, Scripting and Database Design/Development on Oracle/MySQL/SQL Server/PostgreSQL and monitoring tools such as Solarwinds, AppDynamics, IBM Netcool, Splunk.
• Certified Scrum Master, and adept in Agile methodology, Waterfall, ITIL, DevOps and Continue Integration/Deployment, and tools such as HP ALM, Pier Ticket, BMC ITSM, Rally.
• Visa Status: Lawful Permanent Resident/Green Card.

TECHNICAL SKILLS:

Actively use: Java, Perl, Shell Script, C#, PHP, MVC/MVVM Framework, Web Service, SOAP, WSDL, REST, Web API, HTML, OOP, AJAX, XML, JSON, SNMP, SMPP, Amazon Web Service, AWS CLI, AWS SDK for .NET/Java/PHP/Perl, EC2, VPC, RDS, APIs Gateway, Lambda, SQS, SNS, CI/CD, Dynamodb

Additional skills: Java-like Development Environments, C/C++, Sencha Ext JS, Telerik for .NET, Kendo UI, Angular JS, jQuery, JavaScript, Win Work Flow, Pivot table, Excel, Amazon AWS, AWS SDK, Public/Private Cloud, CI/DC, Code Deploy/Pipeline, Jenkins, Docker container, AWS ECS, Informatica ETL, BI, Data Warehouse

Platforms, Database, Tools, Technologies: Oracle, MS SQL Server, MySQL, NoSql DB Cassandra, Window, Linux/ Unix (HP UX, IBM AIX, Solaris), Cluster, Load Balancing, SOAP UI, Jmeter, Wireshark, MS Visual Studio, Team Foundation Server, Git/GitHub, SVN, VS Agile, Scrum, Tomcat, Jboss, IIS, Weblogic, Share Point, JDeveloper, PL/SQL, SQL Developer, SQL Loader, TOAD, Splunk, AppDynamics, ExtraHop

PROFESSIONAL EXPERIENCE:

Confidential, Atlanta, Georgia

Sr./Lead Application Support

Responsibilities:

• Provided 24/7 rotation support for production/non-production environments running on Unix/Linux/Window including large-scale web applications, distributed systems, SOA, backend services, microservices, database, application/web servers, operating systems, and network monitoring.
• Resolved tickets related to the systems created by Tier1/service desk/auto-generated alarm in Tier2/Tier3 queues such as request/incident/defect on ticket system; provided support for any ad hoc requests from management/other departments.
• Performed system/patch upgrade, deployment/configurations by follow standard change request/management process; developed MOP (Method of Procedure) and SIS (Short Interval Schedule) for any changes to the system.
• Took part in war room/incident bridge for any production/critical non-prod environment issues to identify the problem, fix the issue to closure; took ownership to drive RCA (Root Cause Analysis) to define root cause, provide workaround, and provide the corrective actions for permanent solutions and created the KA (Knowledge Article) into the BMC ITSM Problem Management system.
• Maintained the availability of the systems; performed system health check, logs collection, tracing, or via monitoring tools on daily/weekly/monthly and took action if required; generated the weekly operations slide deck for application health, availability, and performance for management.
• Hands-on experience with System/Network monitoring tools such as Solarwinds, IBM Netcool, AppDynamics, Extrahop, and reporting tools such as Splunk and Tableau.
• Created test cases/test plans/test labs, executed test plans in HP-ALM system during the UAT (User Acceptance Test), QAT (Quality Assurance Test), ORT (Operation Readiness Test) before the project went live.
• Developed tools/automation scripts (SQL, Perl, Schell Script) for Teir1/Tier2 support engineers for sanity test/reporting purposes.

Confidential

Application Development Expert

Responsibilities:

• Led in new BSS/OSS/VAS enhancement projects to support business, internal/external customers’ needs: marketing promotions, loyalty programs, services subscription through IVR/USSD/SMS/Portal/Mobile Apps based channels.
• Led in API’s specifications design/development for in-house applications integration as well as third-party applications; developed HLD/LLD, and user stories documents.
• Provided support to application support Tier2 teams for advanced technical level as well as the solutions design questions/issues.
• Led Development/Design of Confidential Billing flow, BSS, OSS, online store, customer self-service portal, to let subscribers buy products (RBT Music, E-Voucher cards, and several Value-Added Services), query/pay bills, subscribe/un-subscribe services, take survey, vote, and join the loyalty programs online.
• Mentored team members and local engineers, provided technical trainings, as well as assisted manager with quarterly performance assessments of team members.

Confidential

Application & Software Engineer

Responsibilities:

• Performed on-site requirements gathering, system analysis and design, as well as the end-to-end call flow design; drew call flow, flow chart, UML and created requirement documents.
• Solutions integrated between Charging System, Billing, Roaming/Interconnect Billing, and VAS within Confidential or third-party vendors.
• Led the project team to test/commission the solutions to ensure the solutions delivered with expected quality and functionalities.
• Developed/Designed interface/APIs specifications for third parties using SOAP/XML/REST/Web API.
• Provided production support for Confidential ’s customers, troubleshot the product issues/defects, resolve issues/defects, or provided workarounds; provided RCA for production issues, took corrective actions and provided long-term solutions.
• Provided on-site/on-call support to customers as Tier2/Tier3 support based on SLA.
• Performed system upgrade and deployment; firmware upgrade.
• Developed project documents including network configurations, hardware/software installations, user guides and provided training to local engineers and customers.