Telecom Software Engineer

The One-Line Mission

You are the Chief Architect of the Robot’s Brain. You are not just writing a module; you are engineering the Complete Production Application that runs on the robot. You define how the system boots, how it manages state, and how it integrates the Robotics Team's ROS-based logic into your high-performance C++ Core without sacrificing speed or safety.

What You Will Engineer (The Complete System)

1. The "Drishti-OS" Application Framework (Core Architecture)

• The Challenge: This is a mission-critical, real-time application running in an explosive zone.
• Your Job: You design the Main Application Lifecycle.
• State Machine: You define the strict logic for the robot's states (e.g., Booting $\rightarrow$ Self-Check $\rightarrow$ Ready $\rightarrow$ Scanning $\rightarrow$ Emergency Stop).
• The ROS Bridge: The Robotics Team uses ROS Middleware for navigation. You architect the efficient Inter-Process Communication (IPC) bridge that allows their ROS nodes to talk to your Real-Time C++ Core without introducing latency into the critical data path.
• Resource Management: You ensure the CPU/RAM are allocated efficiently so the "Data Pump" never starves, even while ROS is calculating trajectory.

2. The "Data Engine" (Ingestion, Sync & Calculation)

• The Challenge: High-velocity data (730 mm/s) meets precise location tracking.
• Your Job: You build the central engine that:
• Ingests: 128 channels of Ultrasonic data via the AFM API.
• Syncs: Merges this data instantly with the ROS-published coordinates (X, Y, Theta) from the Robotics Team.
• Processes: Runs the C++ "Stitching Algorithm" to map raw signals into a coherent buffer for the UI.

3. Production-Grade Safety & Watchdogs (The "Safety Net")

• The Challenge: We operate in explosive refineries (Zone 1).
• Your Job: You implement the Software Safety Watchdogs required for ATEX certification.
• System Health: Your code monitors the heartbeat of the ROS nodes. If the Robotics logic freezes, your architecture must trigger a safe emergency stop immediately.
• Hardware Safety: You monitor internal pressure and motor temperatures, overriding control loops if physical limits are breached.

4. Data Persistence (The Digital Twin Source)

• Your Job: You own the .DRISHTI binary file format. You ensure that what we write to the disk is a corrupt-free, memory-mapped exact replica of the inspection, ready for the Full Stack Team to ingest.

5. The "Immortal" Deployment Architecture

• Your Job: You define how the code gets to the robot. You architect the OTA (Over-The-Air) System with Atomic Rollbacks. If a new update fails to boot, your architecture ensures the robot automatically reverts to the previous working version.

Who You Will Interact With

You sit at the center of the engineering circle:

1. Robotics Engineers (ROS Team):

• They do: They use ROS (Robot Operating System) middleware to build the robot's kinematics, navigation, and control logic.
• You do: You provide the architectural framework they plug into. You ensure their ROS messages (Pose/Odom) are consumed efficiently by your Core System.

1. UI/UX Developer (Qt/QML):

• They do: They build the visual dashboard.
• You do: You provide the Backend API and Signals to drive their interface.

1. Full Stack Developers (Cloud):

• They do: They build the customer-facing Reporting Platform.
• You do: You define the .DRISHTI File Contract so they can perfectly parse the data you save.

The Tech Stack You Architect

• Core: Modern C++ (17/20) (Smart Pointers, Move Semantics).
• Integration: ROS / ROS2 (Subscribers, Publishers, Custom Messages).
• Framework: Qt 6 Core (Event Loop, State Machine Framework).
• OS Level: Linux System Programming (Systemd, Kernel Tuning, Watchdogs).
• Architecture: Multi-threaded Producer-Consumer, Lock-Free Buffers, Shared Memory.

About the Role

We are looking for a skilled and dedicated FreeSWITCH Engineer with hands-on experience in VoIP systems. You will play a key role in developing, configuring, and maintaining scalable and reliable FreeSWITCH-based voice infrastructures. This is a onsite role based in Gurugram location.

Key Responsibilities

• Design, deploy, and maintain FreeSWITCH servers and related VoIP infrastructure.
• Troubleshoot and resolve FreeSWITCH and VoIP-related issues.
• Develop custom dial plans, modules, and call routing logic.
• Work with SIP, RTP, and related VoIP protocols.
• Monitor system performance and ensure high availability.
• Collaborate with development, network, and support teams to optimize voice systems.
• Document configurations, workflows, and system changes.

Requirements

• Minimum 3 years of hands-on experience with FreeSWITCH in a production environment.
• Strong understanding of VoIP technologies and SIP protocol.
• Experience with Linux system administration.
• Familiarity with scripting languages (Bash, Python, Lua).
• Ability to work independently in a remote setup.
• Strong problem-solving and analytical skills.

Preferred Skills

• Experience with other VoIP platforms (Asterisk, Kamailio, OpenSIPS).
• Knowledge of WebRTC, RTP engines, or media servers.
• Exposure to monitoring tools (Grafana, Prometheus, Nagios).
• Familiarity with APIs and backend integration.

Why Join Us?

• Collaborative and supportive team environment.
• Opportunity to work on innovative VoIP solutions at scale.

About Company:

• Role Overview

• Senior Engineer with a strong background and experience in cloud related technologies and architectures. Can design target cloud architectures to transform existing architectures together with the in-house team. Can actively hands-on configure and build cloud architectures and guide others.

• Key Knowledge

• 3-5+ years of experience in AWS/GCP or Azure technologies
• Is likely certified on one or more of the major cloud platforms
• Strong experience from hands-on work with technologies such as Terraform, K8S, Docker and orchestration of containers.
• Ability to guide and lead internal agile teams on cloud technology
• Background from the financial services industry or similar critical operational experience

About us

Classplus is India's largest B2B ed-tech start-up, enabling 1 Lac+ educators and content creators to create their digital identity with their own branded apps. Starting in 2018, we have grown more than 10x in the last year, into India's fastest-growing video learning platform.

Over the years, marquee investors like Tiger Global, Surge, GSV Ventures, Blume, Falcon, Capital, RTP Global, and Chimera Ventures have supported our vision. Thanks to our awesome and dedicated team, we achieved a major milestone in March this year when we secured a “Series-D” funding.

Now as we go global, we are super excited to have new folks on board who can take the rocketship higher🚀. Do you think you have what it takes to help us achieve this? Find Out Below!

What will you do?

· Define the overall process, which includes building a team for DevOps activities and ensuring that infrastructure changes are reviewed from an architecture and security perspective

· Create standardized tooling and templates for development teams to create CI/CD pipelines

· Ensure infrastructure is created and maintained using terraform

· Work with various stakeholders to design and implement infrastructure changes to support new feature sets in various product lines.

· Maintain transparency and clear visibility of costs associated with various product verticals, environments and work with stakeholders to plan for optimization and implementation

· Spearhead continuous experimenting and innovating initiatives to optimize the infrastructure in terms of uptime, availability, latency and costs

You should apply, if you

1. Are a seasoned Veteran: Have managed infrastructure at scale running web apps, microservices, and data pipelines using tools and languages like JavaScript(NodeJS), Go, Python, Java, Erlang, Elixir, C++ or Ruby (experience in any one of them is enough)

2. Are a Mr. Perfectionist: You have a strong bias for automation and taking the time to think about the right way to solve a problem versus quick fixes or band-aids.

3. Bring your A-Game: Have hands-on experience and ability to design/implement infrastructure with GCP services like Compute, Database, Storage, Load Balancers, API Gateway, Service Mesh, Firewalls, Message Brokers, Monitoring, Logging and experience in setting up backups, patching and DR planning

4. Are up with the times: Have expertise in one or more cloud platforms (Amazon WebServices or Google Cloud Platform or Microsoft Azure), and have experience in creating and managing infrastructure completely through Terraform kind of tool

5. Have it all on your fingertips: Have experience building CI/CD pipeline using Jenkins, Docker for applications majorly running on Kubernetes. Hands-on experience in managing and troubleshooting applications running on K8s

6. Have nailed the data storage game: Good knowledge of Relational and NoSQL databases (MySQL,Mongo, BigQuery, Cassandra…)

7. Bring that extra zing: Have the ability to program/script is and strong fundamentals in Linux and Networking.

8. Know your toys: Have a good understanding of Microservices architecture, Big Data technologies and experience with highly available distributed systems, scaling data store technologies, and creating multi-tenant and self hosted environments, that’s a plus

Being Part of the Clan

At Classplus, you’re not an “employee” but a part of our “Clan”. So, you can forget about being bound by the clock as long as you’re crushing it workwise😎. Add to that some passionate people working with and around you, and what you get is the perfect work vibe you’ve been looking for!

It doesn’t matter how long your journey has been or your position in the hierarchy (we don’t do Sirs and Ma’ams); you’ll be heard, appreciated, and rewarded. One can say, we have a special place in our hearts for the Doers! ✊🏼❤️

Are you a go-getter with the chops to nail what you do? Then this is the place for you.