
Strong FreeSWITCH Implementation Engineer Profiles
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Mandatory (Experience 1) – Must have minimum 4+ years experience, with at least 3+ years of hands-on experience implementing, configuring, and supporting FreeSWITCH in production environments.
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Mandatory (Experience 2) – Must have strong experience in designing and implementing FreeSWITCH call flows, including dialplans, IVRs, call routing, conferencing, SIP profiles, gateways, trunks, and extensions with end-to-end ownership.
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Mandatory (Experience 3) – Must have strong hands-on knowledge of VoIP technologies, including SIP, RTP, RTCP, SDP, WebRTC, and should be capable of troubleshooting call drops, one-way audio, registration failures, NAT traversal, and SIP/RTP-related issues.
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Mandatory (Experience 4) – Must have hands-on experience developing FreeSWITCH dialplans using XML and at least one scripting language such as Lua, JavaScript, or Python, including implementation of call queues, time-based routing, skill-based routing, and failover logic.
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Mandatory (Experience 5) – Must have experience integrating FreeSWITCH with CRM/ERP systems, REST APIs, WebSockets, AI Voice Bots (ASR/TTS), or Billing Platforms, along with hands-on experience using Event Socket Library (ESL) for real-time call control.
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Mandatory (Experience 6) – Must have strong Linux administration experience and should be comfortable deploying and managing FreeSWITCH on Ubuntu/CentOS, along with debugging using fs_cli, sngrep, tcpdump, and working with SQL (MySQL/PostgreSQL) for CDRs and reporting.
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Mandatory (Notice Period) – Immediate Joiners or candidates who can join within 15 days will be highly preferred.
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Mandatory (Location) - Mandatory (Location) – Candidate must be currently based in Delhi NCR only
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Preferred (Experience 1) – Experience with AWS, Azure, or GCP, High Availability (HA), Load Balancing, CI/CD pipelines, automation, backups, and scalable FreeSWITCH deployments.
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Preferred (Experience 2) – Experience implementing WebRTC-based calling solutions, including mod_verto, SIP over WSS, DTLS-SRTP, ICE, and OPUS codec configuration.

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Mail updated resume with current salary-
Email: etalenthire[at]gmail[dot]com
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Dear all,
CONTUS is looking for an ever-growing team with young brains in majority and a couple of senior experts to guide them. A fun-filled group that learns by doing things and love what they do. Opportunities are wide as we not only take up client projects but churn out own apps as well.
Why should you choose Contus?
- A great platform to learn and work in complex full stack development projects Angular, React, Node, Laravel which can take to the next level.
- Attractive perks as per Industry standards & Essential benefits
- Five days of work in a week with flexible work timings.
- A great opportunity to handle Enterprise Accounts across the globe and to manage projects in Internet of Things(IoT), Block-Chain, Full Stack development, Enterprise Mobility, DevOps, Agile and a lot more to keep yourself updated on current trends
- Enterprise accounts includes leading Automobile, Network Security, Truck, Construction, Embedded Electronics oriented clients all over the world which seeks our help in Digital Transformation
CONTUS 11 - https://www.youtube.com/watch?v=sOC62PTw2MU">https://www.youtube.com/watch?v=sOC62PTw2MU
CONTUS Awards 2018 - https://www.youtube.com/watch?v=EX8NEQFQ60s&t=50s">https://www.youtube.com/watch?v=EX8NEQFQ60s&t=50s
Designation : Application Developer / Sr.Application Developer / Tech Lead - Android
Mode of Employment : Permanent
Salary : Industry Standards + Benefits (Medi-Claim Insurance & Accidental Policy)
Work Location : Guindy, Chennai
Working days :Monday to Friday 9.30 AM to 6.30 PM (Flexible 8 Hours)
Venue Details:
CONTUS
- Kamak Towers, 12A,(SP), 6th floor,
- Thiruvika Industrial Estate, Ekkatuthangal, Guindy, Chennai - 32.
- Land Mark: Behind Olympia tech Park.(3rd right)
Note:
*** Candidates attended in 3 Months of duration are not eligible to apply again ***
Job Summary :--
An ever-growing team with young brains in majority and a couple of senior experts to guide them. A fun-filled group that learns by doing things and love what they do. Opportunities are wide as we not only take up client projects but churn out own apps as well.
Responsibilities:-
*Develop and create applications for client projects and in-house requirements.
*Make use of Android frameworks to create UI faster, take control/understand client projects from start to end.
*Deliver the projects successfully in-time with quality.
*Stay updated on the latest industry trends, development practices and evolving mobile technologies.
What we look for :-
Good analytical and programming skills in Java, Android 2.2 + SDK/NDK Development (Web Services & API's, LBS, UI and XML, Layout Design, Social Network Integration, Content Providers etc.), XML, JSON, SQLite3 and MySQL.
Handful experience in tools like Android Studio, Eclipse and analytical tools like Find Bugs and PMD.
Basic knowledge about Hybrid Application and ideas on publishing applications in Android Market.
Knowledge of PHP-driven CMSes & versioning tools like SVN will be added an advantage.
Should be able to do Client Interaction
Expertise in design and development of applications to Android devices / platform.\
Maintain quality and ensure responsiveness of applications.
Hands on experience with Android Studio, APIs and Database usage.
Expertise in automated test tools for Android application.
Exposure to UI design principles and best practices.
Knowledge of open-source Android ecosystem and the available libraries.
Experience in NDK/C++/Java/Android framework.
Hands on experience with SCM tools and services such as Git, Gitlab, gerrit, SVN, others
Familiarity with open source tool chains.
Other GUI design tools and framework experience desirable.
The following are the criteria, that we expect experienced candidates to meet.
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- Must be familiar with design patterns (MVP, MVVM).
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- Should be familiar with writing applications for portrait and landscape orientations.
- Added advantage if the candidate can code in kotlin.
- Added advantage if the candidate has knowledge on XMPP, Socket, Webrtc, VOIP, BLE, Bluetooth Classic.
Kindly prepare on below topics well;
OOM
JVM
Multithreading, Overriding, Overloading
Abstraction, async task,
Main thread, Services
About CONTUS :-
CONTUS started providing digital transformations solutions and services since 2008, even before the actual digital transformation era started. Today after a proud 11 years of successful existence, Contus is consciously driven by the future of Digital techs, not by the current or legacy techs.
The solutions and services of Contus have connected millions of devices and people and hearts across the globe right from heartbeats monitors to Televisions to Cars & trucks to smart cities, with it's Over The Top (OTT) Video on Demand and messaging solutions and also with its full stack IOT enablement services.
With hundreds of digital engineers @Contus, we have enabled millions of end users to connect for elaborate used cases in more the 50 countries.
To know more about us, visit http://www.contus.com/">www.contus.com, a leading mobile application development and web development company
Responsibilities:
- Develop new user-facing features
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You’ll be a good fit if you:
- Have 1+ years of experience developing user facing features
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- Collaboration in a GitHub repository with many contributors and comfortable with workflows like code reviews, forking, pull requests, etc.








