Staff Software Engineer

Calix provides the cloud, software platforms, systems and services required for communications service providers to simplify their businesses, excite their subscribers and grow their value. Staff Software Engineer – Data Plane Software We're seeking a Staff Software Engineer to join our dynamic team and contribute to the development of cutting-edge network solutions for Calix high end carrier access switching products for Internet infrastructure. If you're well-versed in Networking technologies (IP Routing, Multicast, EVPN, EVPN-MPLS, EVPN-VxLAN, VxLAN, SR, SRV6, SR-MPLS, MPLS-FRR), DPDK (Data Plane Development Kit), VPP (Vector Packet Processing), we want to hear from you. Key Responsibilities: Architect, design and implement IP Routing, Multicast, EVPN, EVPN-MPLS, EVPN-VxLAN, VxLAN, SR, SRV6, SR-MPLS, MPLS-FRR Software solutions for high end carrier access switching products for Internet infrastructure. Work with cross functional teams ranging from PON, Ethernet switching and routing software, subscriber management for Triple Play services, performance monitoring to network management to build, integrate, unit test and support software modules within a large-scale system. Draft high level and detailed design documentation for new features and capabilities. Propose and implement tools to accelerate software system development and debug environments. Participate in Design/Code reviews, Architecture discussions, and drive execution with a goal to continuous Software Development process improvements. Propose and implement built in diagnostics and test scripts to help reliability and supportability. Work with product management and solutions engineering to write software functional specification and integration documents. Participate and support in fixing issues arising from customer sites. Analyse system scalability, interworking issues and perform root cause analysis of system issues. Mentor junior engineers within the team. Keep abreast of the latest technologies within our product area. The candidate is expected to demonstrate a deep sense of product ownership with a strong focus on customer satisfaction. Expert in Linux kernel internals, debugging and troubleshooting, with strong knowledge of networking and protocols. Good Knowledge of different data plane architecture like OpenDP, DPDK, OpenFlow, VPP, etc. Good understanding of processor architectures like MIPS, PPC, ARM and x86 architectures and their software dependencies in Linux is necessary. Qualifications: 12+ years working experience in design and development of Layer 3 Data Plane/Control-Plane and Management Plane with embedded products with BS/MS in CS, CE or EE. Proven expertise in C programming for systems-level software development. In-depth knowledge of Linux operating systems, including kernel-level programming. Strong understanding of the Data Path Concepts, including various packet processing models. Hands on experience in design and development of software for IPV4/IPV6/multicast/EVPN/VxLAN/MPLS/SR with Broadcom's DNX and XGS series switch or Marvell switches is necessary. Experience with open source products using Python, C/C++, Git is necessary Proficiency with Linux, x86 virtualization and Inter-process communication is necessary. Experience in programming in a multi-thread/multi-process environment is necessary. Knowledge of Segment Routing is necessary. Knowledge of Interface management, host management, loopback interfaces is strongly desired. Experience in areas such are high availability, facility protection, state replication, embedded database for check-pointing, Linux shared memory primitives, Route Forwarding Infrastructure and Logging Mechanisms is desired. Experience of hands-on software development in large complex software systems is expected. Excellent analytical, integration and debugging skills are necessary. Very Good oral and written communication and multitasking skills are expected. Good understanding and hold on Packet Buffer Management, Mempools, Poll Mode Drivers, Flow and Session Mgmt. VPP plugins architecture, experience in adding new plugins Good understanding of the Cache Utilizations mechanism for both Instruction and Data Cache. Location: India – (Flexible hybrid work model - work from Bangalore office for 20 days in a quarter) PLEASE NOTE: All emails from Calix will come from a '@calix.com' email address. Please verify and confirm any communication from Calix prior to disclosing any personal or financial information. If you receive a communication that you think may not be from Calix, please report it to us at talentandculture@calix.com. The Calix platform enables Communication Service Providers (CSPs) of all sizes to transform and future-proof their businesses. Through real-time data, automation, and actionable insights delivered via Calix One — our cloud-first, AI-powered platform — CSPs can simplify operations, collapse cost, and accelerate innovation. Calix One brings together the automation of everything and the experience of one, empowering customers to deliver differentiated subscriber experiences while driving acquisition, loyalty, and revenue growth. This is the Calix mission: to enable CSPs of all sizes to simplify, innovate, and grow, strengthening both their businesses and the communities they serve. We're at the forefront of a once‑in‑a‑generation change in the broadband industry. Join us as we innovate, help our customers reach their potential, and connect underserved communities with unrivaled digital experiences. To learn more, visit the Calix web site at www.calix.com If you are a person with a disability needing assistance with the application process please: Email us at calix.interview@calix.com; or Call us at +1 (408) 514-3000. Calix is a Drug Free Workplace. You may access a copy of Calix Candidate Privacy Policy HERE and other Calix Privacy Policies HERE.