Network Engineer C++

Tharun Sanapareddy

Phone: +1-201-***-****

Email Id: *******************@*****.***

Summary:

With over 4+ years of experience as a Wireless Network Engineer, I have a strong background in routing, switching, security, load balancing, high-performance computing, large-scale networks, and network design. My expertise is in Linux OS-based Wi-Fi routers, with expertise in C/C++, Shell scripting, Yocto, and Linux kernel debugging for optimal network performance.

Adept at designing and optimizing networking protocols to enhance data transmission efficiency, reliability, and security across enterprise Wi-Fi router infrastructures and embedded systems.

Strong problem-solving skills with hands-on experience in debugging Linux kernel crashes, analyzing system logs, and performing root cause analysis for performance issues.

Proficient in developing and maintaining robust firewall policies using IPTables and Netfilter to secure network traffic and prevent unauthorized access.

Expertise in implementing Linux kernel patches to enhance wireless connectivity, optimize resource allocation, and improve the overall stability of networking devices.

Skilled in packet-level analysis using network sniffers and debugging tools to troubleshoot real-time communication issues and improve network efficiency.

Extensive experience in automating system monitoring, security updates, and network configurations using Shell scripting to improve operational efficiency and reduce manual efforts.

Knowledgeable in integrating Yocto-based builds for firmware development, ensuring seamless updates and optimized performance for Linux-based Wi-Fi routers.

Hands-on experience in designing and implementing load-balancing strategies for Wi-Fi routers using Linux OS tools to optimize bandwidth usage and network performance.

Expertise in Layer 2 and Layer 3 networking protocols, including VLANs, OSPF, BGP, and STP, ensuring robust network design and seamless communication.

Experienced in collaborating with security teams to implement advanced security protocols, enhance authentication mechanisms, and mitigate potential threats in networking environments.

Familiar with a wide range of technologies, including Cisco Routers, Catalyst/Nexus Switches, ASAs, Juniper, F5 Big IP, Cisco Unified Communications Manager, Cisco Unity, Wireless LAN Controllers, AirNet Access Points, Palo Alto Firewalls, Nagios, Solar Winds Orion, Cacti, and Wireshark.

Technical Skills:

Cisco Platforms:

Nexus 9k, 7K, 5K, 2K, 1K

Cisco Routers:

1700,1800,2500,2600,2800,2900,3600,3800,3900,7200,7600,4451,4431

Cisco L2 & L3 Switches:

2900, 3500, 3560, 3750, 4500, 4900, 6500, and 9300

LAN, WAN Technologies:

VLAN, VTP, Inter-VLAN routing, Ethernet, Port-Channel, STP, 802.1x, MPLS

Network Security:

NAT/PAT, VPN, Filtering, IDS/IPS, IPsec, ACL, Remote Access VPN, Site-to-Site VPN, ASA 5505, Fort iGATE, Juniper Net Screen firewall, Palo Alto Firewalls, Cisco ACS

Infrastructure Services:

DHCP, DNS, SMTP, Syslog, FTP

Network Management:

SNMP, Telnet

Network Tools:

Solar Winds, Cisco Works, Wireshark,

Protocols:

OSPF, EIGRP, BGP, SNMP, HTTP, FTP, HTTP, DHCP

Wireless Managed Networks:

Cisco Meraki, Aruba

Load Balancers:

Cisco CSM, F5 Networks (Big-IP)

Cloud Technologies:

Amazon Web services (AWS), Microsoft Azure

Operating Systems:

Windows (Windows 7, 8.1, 10,11), UNIX, Linux

Certifications:

CCNA: Cisco Certified Network Associate

Professional Experience:

AT&T, Remote Jun 2024 – Till date

Network Engineer

Responsibilities:

Developed Wi-Fi router configurations, ensuring seamless connectivity, enhanced security, and optimal performance using Linux OS, C/C++, Shell scripting, and advanced networking techniques.

Optimized networking protocols within Linux OS-based environments, improving data transmission rates, reducing latency, and ensuring high-speed and stable connectivity for all devices.

Implemented and enhanced firewall rules using IPTables and Netfilter, fortifying network security against cyber threats, unauthorized access, and malicious intrusions.

Conducted extensive Linux kernel debugging to resolve system crashes, memory leaks, and performance bottlenecks by leveraging expertise in Yocto, C/C++, and network protocols.

Designed and deployed high-performance networking solutions, improving infrastructure efficiency, stability, and scalability to support high-speed enterprise network environments.

Automated firmware and security patch updates for Linux OS-based Wi-Fi routers using Shell scripting and C/C++, reducing manual intervention and improving operational efficiency.

Optimized Linux kernel modules for Wi-Fi routers, minimizing processing latency, enhancing throughput, and increasing the overall stability of network communications.

Enhanced security protocols in Wi-Fi routers by implementing advanced access control policies, authentication mechanisms, and real-time network activity monitoring.

Resolved complex performance bottlenecks within Linux OS-based network services, ensuring smooth operations and preventing downtime in high-demand networking environments.

Collaborated with cross-functional teams to integrate network solutions into existing Linux OS-based systems, ensuring seamless implementation and operational success.

Conducted real-time traffic analysis on Wi-Fi routers using Linux OS tools, identifying and resolving networking issues before they could impact end-user connectivity.

Developed and deployed robust troubleshooting methodologies for Linux OS-based network environments, improving problem resolution speed and reducing network-related incidents.

Integrated Yocto into Linux OS builds, optimizing firmware performance, enhancing device stability, and ensuring compliance with industry networking standards.

Developed automated security patching frameworks for Wi-Fi routers to proactively address vulnerabilities, reducing the risk of cyber threats and unauthorized access.

Conducted Linux kernel debugging to resolve deadlocks, optimize memory allocation, and prevent unexpected system crashes in high-performance network infrastructures.

Enhanced router firmware stability by implementing kernel-level debugging techniques and optimizations, ensuring reliable connectivity and long-term system performance.

Designed and implemented efficient networking solutions to support high-speed data transfers, reducing packet loss and improving overall network reliability.

Optimized network buffer management using C/C++ techniques to enhance performance, reduce congestion, and prevent packet drops in data-intensive environments.

Improved logging and monitoring of network activity using advanced Linux OS tools, enabling real-time event tracking and proactive threat detection.

Debugged and resolved Wi-Fi connectivity issues using advanced Linux kernel debugging tools, ensuring stable, secure, and high-speed wireless connections for end users.

Designed and implemented advanced LAN features, including VLANs, VTP, Spanning Tree Protocol (STP), trunking (dot1q and ISL), and EtherChannel on Cisco Catalyst switches.

Collaborated with project managers and engineering teams to prepare comprehensive Bill of Materials (BoM) and Statement of Work (SOW) for complex network augmentation projects.

Gained hands-on experience with CWDM, DWDM, coherent optical systems, and troubleshooting optical network issues using tools like OTDR and Optical Spectrum Analyzers (OSA).

Environment: Cisco 3850/3750/3500/3650/6500/7600 switches, SÁ 5500 firewall, Palo Alto PA-3060 firewall, ASR router 1002/1006, juniper EX-2200, EX-4200, M-320 router, QOS, juniper SRX 5800 Fire wall, MPLS, F5 LTM 1600/6400, OSPF, BGP, EIGRP, VLANS, LAN, WAN

Mizuho, NY Aug 2023 – Apr 2024

Network Engineer

Responsibilities:

Engineered Wi-Fi router firmware enhancements by leveraging Linux OS, Yocto, and C/C++ to optimize networking performance, security, and stability across enterprise environments.

Designed and maintained robust firewall policies utilizing IPTables and Netfilter to ensure strict security compliance while optimizing network traffic flow and performance.

Conducted extensive Linux kernel debugging to resolve complex system crashes, enhance device stability, and improve overall network performance in Wi-Fi router infrastructure.

Automated system monitoring and security patch management using Shell scripting to streamline updates, reduce vulnerabilities, and enhance network resilience.

Implemented critical Linux kernel patches to optimize wireless connectivity, improving overall network throughput, stability, and wireless device compatibility.

Developed network performance tuning methodologies for Linux OS-based Wi-Fi devices, leading to significant improvements in data transmission efficiency and system responsiveness.

Performed deep packet-level analysis using network sniffers and protocol analyzers to identify and resolve Wi-Fi connectivity issues affecting real-time data transmission.

Collaborated with cross-functional security teams to enhance firewall rules, access control policies, and network authentication mechanisms to improve enterprise security posture.

Integrated advanced Yocto-based builds into firmware deployment processes to automate updates, ensuring seamless and efficient router firmware rollouts.

Enhanced kernel security measures to prevent unauthorized access, implementing advanced security protocols and mitigating potential Linux kernel vulnerabilities.

Designed and implemented load balancing strategies for Wi-Fi routers using Linux OS tools to optimize bandwidth allocation and ensure consistent network performance.

Debugged complex networking stack issues impacting real-time data transmission, ensuring optimal communication between networked devices within high-traffic environments.

Improved system reliability by refining Linux OS-based network configurations, optimizing kernel parameters, and enhancing overall stability in large-scale Wi-Fi networks.

Led the integration of new security protocols into existing Linux kernel modules, ensuring compliance with evolving security standards and mitigating potential exploits.

Resolved networking bottlenecks in Linux OS-based embedded systems by optimizing routing configurations and debugging low-level kernel network interface interactions.

Developed a structured framework for automated kernel debugging and logging, improving troubleshooting efficiency and accelerating the resolution of system crashes.

Optimized device driver performance for Linux kernel-based Wi-Fi routers, enhancing network throughput, reducing latency, and improving overall wireless communication efficiency.

Enhanced the scalability of Wi-Fi network infrastructures through C/C++-based firmware enhancements, optimizing device provisioning and network topology adaptability.

Conducted in-depth root cause analysis for intermittent Wi-Fi disconnections, utilizing advanced logging tools, packet sniffers, and kernel debugging techniques.

Worked extensively with Layer 3 protocols such as EIGRP, OSPF, BGP, and FHRP to optimize network routing, failover capabilities, and redundancy mechanisms.

Configured and managed Layer 2 protocols including FabricPath, VLANs, Trunking, STP, RSTP, and MSTP to improve network segmentation and loop prevention.

Designed and deployed automated network monitoring solutions using Shell scripting, reducing downtime, proactively detecting issues, and improving overall system efficiency.

Implemented proactive kernel tuning strategies to enhance Wi-Fi router performance, optimizing memory allocation, scheduling, and interrupt handling for increased efficiency.

Value Labs, India Jul 2020 – Nov 2022

Network/System Engineer

Responsibilities:

Executed redistribution of RIP and EIGRP into OSPF, optimizing network routing and improving data flow.

Configured and tested Cisco routers, switches, and ASA firewalls using OSPF routing protocol and MPLS switching to ensure stable VPN connectivity.

Provided administrative support for OSPF and BGP routing protocols, ensuring efficient network operations.

Deep experience with MPLS-TE, L2/L3 VPN, VRF-lite, and inter-AS MPLS, ensuring efficient secure data transport.

Troubleshooting issues related to L2 protocols - VLAN, STP, RSTP and L3 protocols - RIP, OSPF, BGP, IPv4, IPv6, TCP/IP stack, DHCP, DNS, Multicast, 1/10 GB, Ethernet& SNMP.

Managed load balancers such as F5 Big-IP LTM, GTM, and Kemp Load Balancer to ensure application availability and performance.

Expertise in security protocols like VPNs, IDS/IPS, and network encryption devices such as TACLANE for securing sensitive communications.

Configured and tested routing protocols, including BGP, EIGRP, OSPF, RIP, and switching protocols like STP and VLAN trunking (802.1Q), during migrations involving Sourcefire and other target devices.

Performed switching tasks, including VTP, ISL/802.1Q trunking, IPSec and GRE tunneling, VLAN configuration, EtherChannel, port security, and STP/RSTP implementation.

Education Details:

Masters in Computer Science, Sacred Heart University, Connecticut, USA

Bachelors in Anna University, Chennai, India

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