We provide IT Staff Augmentation Services!

Architect / Qa Engineer Resume

Redmond, WA

PROFESSIONAL SUMMARY:

  • Around 8+ year of experience in Network testing, designing, device testing, scripting using Python, configuring and troubleshooting enterprise and wireless mobile networks with experience using test tools to simulate traffic
  • Involved in designing subscriber and network inventory solution for Confidential & Confidential ANT Tool
  • Executing Test scenarios using ANT Tool which uses Ixia and Landslide and Real Confidential as traffic generator tools along with Confidential & Confidential, Cricket and other Reseller Subscribers.
  • Using Confidential Devices for ANT Project, debugging and troubleshooting for ANT on Confidential related issues for Confidential & Confidential
  • Involved in understanding High level Design documents for Script Resource allocation and system level parameters for ANT Automation tool
  • Involved in QA validation for Test management as well as Configuration Management Verification for AMP Automation Tool
  • Responsible for QA validation for Zero Rating and QoS verification for cricket subscribers Using AMP Automation tool
  • Involved in integration and E2E test execution for Attach, S1 - HO, IR.92, IR.94 and IPME scenarios
  • Involved in troubleshooting Network issues and iTAP Script Issues.
  • Involved in Log analysis for EPC procedures according to the 3GPP spec
  • Analyzing Pre-paid and post-paid subscriber call flow on Neo and Sundance Zone
  • Involved in Zone integration to ANT Tool
  • Involved in network element vendors in case of critical issues which is observed during validation
  • In-Depth understanding of 3GPP Protocols and interfaces like S1-MME, S1-U, S5, S6a, Gx, Rx
  • Expertise in gathering, planning and execution of test cases in lab environments and real core network environment along with iTrack defect tracking using QA Complete test management tools
  • Knowledge on 2G/3G/4G LTE network elements and interfaces including VoWiFi interfaces
  • Experience working on analyzing the call flows end to end in 4G LTE, 3G, SRVCC, CSFB
  • Experience with CDMA, GSM wireless technologies and other 3GPP, 3GPP2 networks
  • Knowledge on GTP, Radius, LDAP, Diameter, SIP, VoIP, TCP/IP protocols
  • Experience working on IRAT, Domestic roaming and multiple other handover scenarios
  • Knowledge on different Radio Access Network architectures and their core elements
  • Experience running daily stable checks and validating network and element functionality
  • Experience building landslide scripts which includes changing session builder, traffic capturing on ports, test case settings, test configuration, command sequence, SUT, Interface configuration, Diameter/AVP configuration, GTP settings, Bearer settings, data traffic network
  • Experience working with Landslide scripts to test VoWiFi. Settings include IPSec tunnel settings, IKE keys, authentication, encryption, EAP shared key settings
  • Knowledge on IxLoad, Landslide, Tektronix and other customized traffic simulators
  • Knowledge on policy enforcement and charging mechanism in the EPC core network
  • Migrating 3G to HSPA speeds by upgrading mobile backhaul and cell site infrastructure
  • Expertise in packet capture and analyzing the data call flow from UE towards PDN
  • Expertise in testing E2E call flows, network health checks, reporting and troubleshooting
  • Expertise in designing and execution of test cases from test plan and managing test lab
  • Knowledge on Functional testing on Packet Core and Mobile core testing and upgrade
  • Through understanding of diameter messages and call flows on Gx and Rx interface
  • Understanding of SPGW, PCEF functionalities in 3G/LTE networks
  • Basic knowledge on integrating IMS to EPC core to allow Voice over LTE
  • Experience in packet analyzing tools like Ethereal, Wireshark protocol analyzers
  • Manual Testing experience in Mobile handset for GSM/GPRS/3G/LTE Applications
  • Expertise in manual testing & Mobile Application Testing
  • Experience in testing the application on different Mobile Handset
  • Effective team player with good interpersonal and communication skills

TECHNICAL SKILLS:

Traffic Simulators: Ixia IxLoad, Spirent Landslide, Call Gen, R&S, Anite, Aniritsu etc.

Protocols: EIGRP, OSPF, IS-IS & BGP, SIP, SCTP, RTP, TCP/IP

Platforms: SPGW, PCRF, MME, RNC, SPR, DNS, FW, LB, IMS, EPDG, AAA, CGW etc.

Interfaces: S1u, S4, S5, S8, S11, S2b, S6b, S6d, Gx, Gy, Gz, Sy, Sp, SWm, SWu etc.

Reporting Tool: iTrack JIRA, HP ALM

PROFESSIONAL EXPERIENCE:

Architect / QA Engineer

Confidential, Redmond, WA

Responsibilities:

  • Involved in designing subscriber and network inventory solution for Confidential & Confidential ANT Tool
  • Designing Test scenarios using ANT Tool which uses Ixia and Landslide as traffic generator tools along with Neo Consumers, FirstNet, Cricket and other Reseller Subscribers
  • Executing Test scenarios using ANT which uses Ixia and Landslide simulators
  • Involved in creating the Landslide scripts for Basic Attach, S1-HO, IR.92/94/IPME tests
  • Involved in Enhancing the existing Landslide Script
  • Creating Test scripts using Confidential as real UE emulator
  • Re-designing Confidential scripts while coming across flow issues which are related to Confidential
  • Designed call flow analysis for FirstNet related call flows like bearer upliftment calls and IMS flows
  • Involved in network implementation analysis for CUPS solution using option 3X
  • Involved in network preparation for 5G Standalone architecture
  • Designed Resource allocation and system level parameters for ANT
  • Responsible for QA validation for Test Management and configuration management on Zero Rating and QoS verification for cricket subscribers using AMP Automation tool
  • Worked on Velocity and iTest Test execution tool for Spirent
  • Involved in integration and E2E test execution for Attach, S1-HO, IR.92, IR.94 and IPME scenarios
  • Checking network behavior for on-Demand dedicated bearers for ADTM R4 flows
  • Involved in troubleshooting Network issues and iTAP Script Issues.
  • Involved in Log analysis for EPC procedures according to the 3GPP spec
  • Analyzing Pre-paid and post-paid subscriber call flow for Neo and Sundance Zone
  • Involved in Zone integration to ANT Tool
  • Involved in network element vendors in case of critical issues which is observed during validation
  • Worked on Backend Mongo Database and Pronghorn to analyze and configure the Automation Portal
  • In-Depth understanding of 3GPP Protocols and interfaces like S1-MME, S1-U, S5, S6a, Gx, Rx
  • Expertise in gathering, planning and execution of test cases (HP ALM) in lab environments and real core network environment along with iTrack defect tracking (Jira software) for QA Complete test management tools
  • Involved in QA validation for Test management as well as Configuration Management Verification for AMP Automation Tool

System Test Lead Engineer

Confidential, San Diego, California

Responsibilities:

  • Worked on LTE -3GPP TS 36.523-1 Protocol Conformance Test Specifications -3GPP TS 36.523-1, with focus on idle mode operations such as PLMN selection, Cell selection Reselection, Inter-RAT cell Selection and Reselection.
  • Good Understanding on VOLTE/VT call flows and IMS registration Procedure.
  • EPS Mobility Management Procedures with focus on EMM common procedures and EPS Session Management procedures, Mapping between different Logical Channels and Transport channels, RRC connection management procedures etc.
  • Experienced in using the Test Equipment/Simulators such as Rhode &Schwarz CMW500 Wideband Radio Communication tester, Anritsu ME7873L - LTE RF Conformance Test System, Anite 9000 Mobile Test Accelerator, and Spirent 8100.
  • Strong Knowledge of LTE- Frequency Scan, Initial Acquisition, SIB Procedures, Random Access Procedure (RACH), RRC Procedures, Idle & Connected Mode Measurements, LTE to WCDMA IRAT, CSFB Procedure, Default and Dedicated Bearers Set up and tear down of SRB’s & DRB’s.
  • Strong understanding of LTE -Channel Mapping, UE Protocol Stack and Protocol interaction UE Attach Procedure (idle), RRC connection Reactivation, Downlink Data Flow, Master Information Block & different System Information Blocks etc.
  • Good Understanding LTE Network Architecture and functions of different components of networks such as eNodeB, MME, PCRF, S/GW, P/GW etc.
  • Significant Knowledge of LTE- Log Analysis, Issue Debugging and troubleshooting, performing RF Calibration, Updating the Calibration data, Tracking and closing of issues with respect to different LTE Layers
  • Execute test cases, collect logs, upload to repository and defect tracking and resolution
  • Test various LTE, VoLTE interfaces using traffic simulators and real UEs
  • Software integration, verification and debugging Confidential product software level.
  • Software integration involves integrating all the components for the products such as High-Level OS (e.g. Android, Win-phone, etc.), Modem processor SW, Multimedia and other components for the product.
  • Maintaining automated test stations to perform sanity for the integrated software.
  • Support integration on customer baseline
  • Log analysis and debugging for root causing the test failures seen after integration.
  • Making internal and external software releases following the tools and process in the organization
  • Sanitize Modem (SS, DSDS, DSDA) and Non-Modem and release for Customer, based on customer milestone
  • Worked as a part of Focus group for-LTE, WAN and DSDS
  • Worked on different integration builds on various chipsets, tested features and initial analysis of test failures
  • Have worked on designing Internal tool to track the usage of the internal tools (psi tool) used by the integration team
  • Actively involved in chipset bring up, setup, analysis and debugging of issues in bring up lab

Advanced Lab Support Engineer

Confidential, Raleigh, NC

Responsibilities:

  • Perform capacity and latency tests on the upgraded IP packet network
  • Replicate and troubleshoot production issues in Confidential Lab and check sanity
  • Knowledge on diameter routing through DSR, peering with PCEF
  • Understanding of AVPs, Command/result codes, call flows, roles, peers, connections
  • Knowledge on Integration of IMS to packet core network to allow Voice over LTE
  • Expertise on testing communication between PCEF to P-CSCF via Gx and Rx interfaces
  • Understanding SIP signaling and other diameter messages to and from PS and IMS
  • Knowledge on load balancing diameter messages from PCEF-PCRF-AF
  • Testing multi call scenarios, call hold, call trace, call log, conference, M2L and M2M calls
  • Expertise in understanding the call flow and architecture of the new core network
  • Expertise working in closed RF environments using radio equipment
  • Expertise in testing the configured QOS rules, Rule definitions and content definitions
  • Testing AMBR, QOS enforcement, Bandwidth enforcement during IRAT scenarios
  • Expertise in understanding the provisioning and configuration of APN on core network
  • Testing multi-vendor user equipment with multiple vendor network configurations
  • Report and perform health checks on the newly integrated core network
  • Working experience on LTE application and messaging protocols on various interfaces
  • Hands-on experience using Tektronix probes and JDSU Signaling analyzers
  • Test the upgraded mobile backhaul with new core network with ALU and Confidential GW
  • Execute and report the testing status to higher management for coordinating with other teams to know the status of installation and integration of elements in the lab
  • Designing Access list and troubleshooting IP addressing issues for lab remote access
  • Experience using multi-vendor mobile equipment with multi-vendor OS platforms
  • Basic knowledge on understanding a voice call flowing over the LTE packet network
  • Using test tools for IP data throughput measurement, latency tests and link capability
  • Manage and monitor health checks of all the EPC elements using ALU SAM 5260
  • Upgrade the S/W on the cell site routers and network aggregation routers
  • Upgrading the IOS on Confidential and Alcatel SAR routers and perform regression testing
  • Capturing the packets for traffic analysis using Tektronix Multi user server probes
  • Analyzing the packets using Wireshark before reporting the issues to concerned team
  • Hand-on experience working with multivendor lab setups for 3G, HSPA and 4G LTE
  • Maintain logs of network and bandwidth utilization of servers and network devices and create utilization report based on the logs
  • Testing the network compromising multivendor base stations, Mobile multimedia entities, HSS, 3G RNCs other cell site routers Confidential EnodeBs in the environment

Network Engineer

Confidential

Responsibilities:

  • Ensure Network, system and data availability and integrity through preventive maintenance and upgrade.
  • Responsible for service request tickets generated by the helpdesk in all phases such as troubleshooting, maintenance, upgrades, patches and fixes with all around technical support
  • Supporting EIGRP and BGP based network by resolving level 2 &3 problems of internal teams & external customers of all locations
  • Configuring HSRP between the 3845 router pairs for Gateway redundancy for the client desktops.
  • Configure VRRP & GLBP and VLAN Trunking 802.1Q, STP, Port Security on Catalyst 4500 switches.
  • Configuring STP for switching loop prevention and VLANs for data and voice along with Configuring port security for users connecting to the switches.
  • Perform IP readdressing, bandwidth upgrades, IOS/platform upgrades
  • Performed route redistribution between different routing protocols.
  • Involved in L2/L3 Switching Technology Administration including creating and managing VLANs, Port security, Trunking, STP, Inter VLAN routing, LAN security.
  • Network Cabling, dressing, labeling and troubleshooting various network drops onsite.

Hire Now