Senior Software Engineer-SIP, Golang, C++

Motorola Solutions; Bengaluru; On-site; INR 3,000,000 - 6,500,000; Full time

Job summary

Motorola Solutions is seeking an experienced Software Engineer to design high-throughput SIP-based microservices in a multi-site setup. You will architect stateless services in Go, implement protocol translations, and optimize concurrency for peak performance.

The role requires 8+ years of hands-on software engineering experience, expertise in Go and SIP, plus strong knowledge of distributed systems, gRPC, and messaging queues.

Qualifications

• 8+ years of software engineering experience in telecom or high-performance distributed systems.
• Proficiency in Go (Golang) with strong CS fundamentals.
• Experience with SIP/VOIP and related telecom protocols.
• Strong knowledge of distributed systems, multi-threading, and concurrency control.
• Hands-on experience with gRPC, RabbitMQ, and data stores like Redis/PostgreSQL.

Responsibilities

• Design and architect high-throughput SIP microservices with Go, targeting 5,000+ TPS and sub-15ms latency.
• Implement protocol translation for SIP-over-TCP/TLS to internal ZeroMQ traffic.
• Develop concurrency models and thread-safe messaging for heavy load.
• Integrate distributed state management and security with key rotation and vaults.
• Define load balancer routing, DNS SRV logic, and end-to-end tracing with OpenTelemetry.

Skills

Golang

Distributed systems

Multithreading

SIP/VOIP

C/C++

Networking protocols

OpenTelemetry

Tools

ZeroMQ

PostgreSQL

Redis

ElasticSearch

Apache Ignite/GridGain

RabbitMQ

Job description

Company Overview

At Motorola Solutions, we believe that everything starts with our people. We’re a global close-knit community, united by the relentless pursuit to help keep people safer everywhere. We build and connect technologies to help protect people, property and places. Our solutions foster the collaboration that’s critical for safer communities, safer schools, safer hospitals, safer businesses, and ultimately, safer nations. Connect with a career that matters, and help us build a safer future.

Company Overview

At Motorola Solutions, we believe that everything starts with our people. We’re a global close-knit community, united by the relentless pursuit to help keep people safer everywhere. We build and connect technologies to help protect people, property and places. Our solutions foster the collaboration that’s critical for safer communities, safer schools, safer hospitals, safer businesses, and ultimately, safer nations. Connect with a career that matters, and help us build a safer future.

Department Overview

We are seeking an experienced Software Engineer to join our core engineering team to design and develop a high-throughput, mission-critical active-active SIP based microservices across multi-site deployments.

Job Description

Key Responsibilities:

• Design and architect high-throughput, stateless SIP microservices using Go, achieving strict performance targets such as 5,000+ TPS and sub-15ms latency budgets.
• Implement complex protocol translation layers to convert inbound SIP-over-TCP/TLS traffic from load balancers into high-speed SIP-over-ZeroMQ traffic for internal stateless services.
• Engineer advanced concurrency models utilizing ZeroMQ Router/Dealer socket pooling and internal thread-bridging patterns to prevent mutex bottlenecks and ensure thread-safe message passing under heavy load.
• Integrate distributed state and security mechanisms, including automated cryptographic key rotation using discovery tools for leader election and secured vaults for private key storage.
• Enforce surge protection and reliability by building multi-layered throttling, distributed batch schedulers, and exponential backoff handling
• Partner with Network and Infrastructure teams to define advanced load balancer routing frameworks, DNS SRV query logic, and implement distributed tracing (OpenTelemetry) for end-to-end observability.

Basic Requirements

Required Skills & Experience

• Knowledge of SIP/VOIP & related telecom protocols.
• Deep hands-on experience in Golang (preferred) and proficiency in c++/c
• Strong computer science fundamentals, data structures, and algorithms.
• Deep understanding of distributed systems, multi-threading, concurrency control, stateless proxies and Finite State Machines (FSM).
• Hands-on expertise with networking and messaging protocols including gRPC and RabbitMQ.
• Strong background with distributed databases like Apache Ignite and GridGain.
• Practical knowledge of persistence and caching solutions such as PostgreSQL, Redis, and ElasticSearch.
• Excellent written and verbal communication skills for technical documentation and explaining complex ideas.
• Industry Experience - 8+ years

Travel Requirements

Under 10%

Relocation Provided

None

Position Type

Experienced

Referral Payment Plan

Yes

EEO Statement

Motorola Solutions is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion or belief, sex, sexual orientation, gender identity, national origin, disability, veteran status or any other legally-protected characteristic.

We are proud of our people-first and community-focused culture, empowering every Motorolan to be their most authentic self and to do their best work to deliver on the promise of a safer world. If you’d like to join our team but feel that you don’t quite meet all of the preferred skills, we’d still love to hear why you think you’d be a great addition to our team.