Network Engineer 3(Network Architect)

Exotel is the emerging market's leading full-stack customer engagement platform and business-focused virtual telecom operator. Incorporated in 2011, Exotel's cloud-based product suite powers 50 million daily engagements across voice, video and messaging channels. Exotel powers unified customer engagement to over 6000 companies in 60+ countries, including India, Southeast Asia, the Middle East, and Africa. Today, some of the fastest-growing companies in the emerging markets (Ola, Swiggy, Flipkart, GoJek, Byju's, Urban Company, HDFC Bank, Zomato, Oyo, etc.) manage their customer engagement with Exotel's suite of communication APIs, Ameyo's omnichannel contact centre (merger), and Cogno AI's conversational AI platform (acquisition) over the cloud. They're a $100 million Series D-funded company. 

Exotel engineering solves some cool infrastructure-level problems to ensure no one misses a call or an SMS.

• Our focus is on building a very fault-tolerant, loosely coupled, scalable, and real-time distributed system

• We are generally agnostic of language, technology, or tools. Currently, our tech stack is built on Golang, , Ruby, Java, and PHP. We use Aerospike, MySQL as data stores, ElasticSearch for search, and Beanstalkd for queuing

• We emphasise a lot on clean abstractions of code, loosely coupled services, and good coding practices

• We are very strong believers in "you built it, you own it". And running a distributed system is very different from just building one

• We are crazy about high availability.

The "Exotel Engineering" Team builds applications and products enabling customers to use our Public Cloud Contact Center offering. The team builds the regulatory layer required for complying as a Virtual Telephone Operator. The team is responsible for building and maintaining a software layer on top of the Telecom Carrier network that helps in determining the best path for completing a call or delivering a message. The Intelligent infra layer on top of the global telecom infrastructure ensures reliability, cost, and quality. 

Network Engineering within the Exotel Engineering team involves all aspects: Proactive Engineering, Network Optimisation, and operational network support for network connectivity to telecom operators, cloud and DC networks across our Data centres, designing and architecting services and features, development, testing, instrumentation, deployment, stabilisation, and operations. 

You'll be heavily involved in the core network / Data centre layer, which forms the backbone of our connectivity offerings, with a primary focus on network engineering. Your tasks will go beyond simply expanding to new locations and geographies, requiring constant consideration of challenges such as rapidly scaling out the cluster to double its capacity, elevating reliability from 99.95 to 99.99, and optimising redundancies,  improving response times by trimming off milliseconds.

We are looking for technically very strong candidates with a strong understanding of Networking Systems. We want people who love designing and building infrastructure components and large complex services. We are looking for engineers driven by a passion to create application systems that can redefine Connectivity on top of global telecom infrastructure.

You will be a part of the "Network Engineering" team at Exotel. Specifically, we are looking for engineers to design and architect the Data centre that helps create a Telecom carrier-agnostic infra layer that Exotel and other tech stacks can use.

Responsibilities include end-to-end network engineering aspects:

• As a Network Engineer, you will be working on Exotel's network and have end-to-end ownership (architecture/design/scale/operations) of our current and newly developing networks.

• Knowledge and experience in telecom SBC(Mandatory)

• Lead the design of highly available large-scale telephony networks, driving them from concept to launch

• Work closely with our software developers to fully automate network deployment and operations

• Drive operational excellence projects to improve network performance and reliability

• Enforce and strengthen the security levels of the data centres.

• Troubleshoot complex problems and develop innovative solutions

• Dive Deep into the high severity of incidents, recommend preventative solutions, and participate in root cause analysis

• Partner with our broader Technical Operations organisation to reduce operational burden

• Support in organisational transformation from reactive to proactive, with a focus on predictiveness

• Deliver simple, sustainable, and repeatable solutions and processes

• Drive standards across the network and ensure that we are fully compliant to those standards and policies

• Participate in hiring and developing the best

• Help enforce and/or tweak SLAs for existing deployments to improve efficiency

• Stakeholder management 

• 8+ years of experience with a Bachelor's / Master's Degree in Computer Science or equivalent.

• Knowledge and experience with LAN/WAN/SD-WAN infrastructure

• Knowledge and experience in telecom SBC

• Knowledge and experience with internet routing protocols and concepts: SIP, WEBRTC, TCP/IP, VLAN, BGP, OSPF, MPLS

• Knowledge and experience with network security and various secure VPN technologies

• Knowledge and experience with network operating systems such as Cisco IOS and Junos

• Experience working in a Linux/Unix environment, DNS and DHCP

• Experience in various network monitoring tools 

• Experience in automation via Bash/shell scripting and Perl/Python programming

• Knowledge of various end-user devices and their network interactions

• Proficiency in configuring and managing networking devices, including switches, routers, firewalls, and SBC

• Knowledge of network analysis fundamentals and robust troubleshooting skills, specifically, network performance analysis

• A "DevOps" mindset. You own what you will develop.

• Excellent written and verbal communication skills, with strong attention to detail and a head for problem-solving.

• Team-player, flexible, and able to work in a fast-paced environment

• Strong project management skills, issue prioritisation, and stakeholder communication. 

• Exposure to databases like Mongo, Redis, MySQL, or other relational DBS

• Strong understanding of Microservice design and distributed architecture

• Exposure to Monitoring tools, building and deploying pipelines and tools