
Job Opening: FreeSWITCH Developer
Location: Ecospace Business Park, Rajarhat, Newtown, Kolkata
Employment Type: Full-Time, Permanent
Shift: Day Shift
Experience: Minimum 4+ years in FreeSWITCH/VoIP Development
Responsibilities:
- Design, develop, deploy, troubleshoot, and maintain tools and services supporting our cloud telephony network.
- Customize FreeSWITCH for large-scale audio/video conferencing (1000–1500 concurrent calls).
- Expertise in SIP, RTP, RTCP, TURN, STUN, NAT, TLS.
- Hands-on experience with RTP Proxy and routed audio conferences.
- Understanding of SDP Protocol offer/answer mechanism.
- Work with load testing tools for FreeSWITCH audio conferences.
- Deploy and manage multiple FreeSWITCH instances using load balancers.
- Debug issues using packet captures (Wireshark/Ngrep).
- Collaborate with mobile/API teams for integration and support.
- Knowledge of codecs (PCMU, PCMA, G729, Opus) and open-source telephony technologies (FreeSWITCH, WebRTC).
- Familiarity with SIP servers (SER/OpenSER), proxy servers, SBC, SIPX is a plus.
Qualifications:
- Bachelor’s degree in Engineering (B.Tech/MCA).
- 4+ years of hands-on experience in FreeSWITCH development or related VoIP technologies.
- Strong knowledge of Linux environments and command-line tools.
- Basic to intermediate SQL knowledge.
- Proficiency in scripting (Bash, Python, Perl) for automation.
- Strong understanding of VoIP protocols (SIP, RTP), networking principles (TCP/IP, DNS, DHCP, routing protocols).
- Excellent troubleshooting skills with ability to resolve complex technical issues.
- Strong problem-solving, communication, and collaboration skills.
Industry Preference:
- Travel (Preferred)
- Any Industry (Required)

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Job Title: Software Developer
Location: Remote
About Us: CipherSonic Labs is a cutting-edge technology company specializing in data security and privacy solutions for enterprises processing sensitive data in the cloud. We develop high-performance cryptographic software and hardware acceleration techniques to enable secure computing. Our team is looking for talented individuals to contribute to innovative projects in secure computing and high-performance software development.
Job Description: We are seeking a Software Developer to assist in the development of high-performance software solutions. This role will involve working on low-level programming, optimizing cryptographic algorithms, and improving performance for security-critical applications. The ideal candidate will have a passion for systems programming, algorithm optimization, and working in a high-performance computing environment.
Key Responsibilities:
· Develop and optimize software using C/C++ for high-performance computing applications.
· Work on cryptographic algorithm implementations and performance tuning.
· Optimize memory management, threading, and parallel computing techniques.
· Debug, profile, and test software for performance and reliability.
· Write clean, efficient, and well-documented code.
Qualifications:
· Completed a B.S. or higher degree in Computer Science, Computer Engineering.
· Strong programming skills in C and C++.
· Familiarity with Linux-based development environments.
· Basic understanding of cryptographic algorithms and security principles is a plus.
· Experience with AWS Lambda, EC2, S3, DynamoDB, API Gateway, Containerization (like Docker, Kubernetes) is a plus.
· Knowledge of other programming languages such as Python, Rust, or Go is a plus.
· Strong problem-solving skills and attention to detail.
· Ability to work independently and collaboratively in a fast-paced startup environment.
What You’ll Gain:
· Hands-on experience in systems programming, cryptography, and high-performance computing.
· Opportunities to work on real-world security and privacy-focused projects.
· Mentorship from experienced software engineers and researchers.
· Exposure to cutting-edge cryptographic acceleration and secure computing techniques.
· Potential for future full-time employment based on performance.
We are a tech venture which provides Product Engineering, QA Automation, Infrastructure, Data, and Market Research services.
Technical Proficiency :
Must have :
-
Strong development experience in Python in the environment of Unix/Linux/Ubuntu
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Strong practical knowledge of Python and its libraries.
-
Current working experience with cloud deployment of AWS/Azure/GCP, Microservice architecture, and Docker in Python.
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Good knowledge of CI/CD and DevOps practices
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Good Experience of Python with Django/ Scrapy/ Flask frameworks.
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Good Experience in Jupyter/ Docker/ Elastic Search, etc.
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Solid understanding of software development principles and best practices.
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Strong analytical thinking and problem-solving skills.
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Proven ability to drive large-scale projects with a deep understanding of Agile SDLC, high collaboration, and leadership.
Good to have : -
Expected to have migration experience from one version to the other, as this project is about migration to the latest version.
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Preferred if had an OpenEdx platform experience or any LMS platform.
Responsibilities :
- Develop server side applications in C++
- Contribute in analysis based on requirements. Analysis can be in the form of research and producing Proof of Concepts.
- Produce documents and specifications wherever required.
- Work collaboratively with other developers and QA engineers to deliver the solutions.
Roles and Responsibilities
• Ability to create solution prototype and conduct proof of concept of new tools.
• Work in research and understanding of new tools and areas.
• Clearly articulate pros and cons of various technologies/platforms and perform
detailed analysis of business problems and technical environments to derive a
solution.
• Optimisation of the application for maximum speed and scalability.
• Work on feature development and bug fixing.
Technical skills
• Must have knowledge of the networking in Linux, and basics of computer networks in
general.
• Must have intermediate/advanced knowledge of one programming language,
preferably Python.
• Must have experience of writing shell scripts and configuration files.
• Should be proficient in bash.
• Should have excellent Linux administration capabilities.
• Working experience of SCM. Git is preferred.
• Knowledge of build and CI-CD tools, like Jenkins, Bamboo etc is a plus.
• Understanding of Architecture of OpenStack/Kubernetes is a plus.
• Code contributed to OpenStack/Kubernetes community will be a plus.
• Data Center network troubleshooting will be a plus.
• Understanding of NFV and SDN domain will be a plus.
Soft skills
• Excellent verbal and written communications skills.
• Highly driven, positive attitude, team player, self-learning, self motivating and flexibility
• Strong customer focus - Decent Networking and relationship management
• Flair for creativity and innovation
• Strategic thinking This is an individual contributor role and will need client interaction on technical side.
Must have Skill - Linux, Networking, Python, Cloud
Additional Skills-OpenStack, Kubernetes, Shell, Java, Development
With over 40 years of innovation, Quantum's end-to-end platform is uniquely equipped to orchestrate protect, and enrich data across its lifecycle, providing enhanced intelligence and actionable insights. Leading organizations in cloud services, entertainment, government, research, education, transportation, and enterprise IT trust Quantum to bring their data to life, because data makes life better, safer, and smarter. Quantum is listed on Nasdaq (QMCO) and the Russell 2000® Index. For more information visit www.quantum.com.
As a Software Engineer, you will collaborate with engineers and product managers on the development and maintenance of Quantum’s DXi-Series of disk-based backup appliance software. Quantum’s DXi series protects our customers data on premises, in the cloud, or in a hybrid environment.
You Are A Part Of:
DXi is a uniquely powerful solution within the Quantum portfolio, allowing customers to meet and exceed their backup needs with one of the fastest products on the market. You’ll work on a product that allows customers to reduce costs, maximize production, scale with ease, and positively impact the environment by reducing power and cooling requirements.
Job Responsibilities:
Responsibilities include, but are not limited to:
• Write code primarily for Linux systems, with programming languages including Python, C, C++, and Perl.
• Design and build differentiating feature sets that continue to expand product capabilities, both on premises and in the cloud.
• Work with development, test, service, and support engineers to develop tactical solutions for customer issues.
• May design and develop automated test suites.
• May maintain lab equipment.
Required Skills and/or Experience:
• Bachelor’s degree in Computer Science, Information Technology, or related field of study required.
• 5-10 years related industry experience required.
• 5+ years software development in C or C++ is required.
• 3-5 years’ experience working in a Linux environment is required.
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• Experience with source control and shared build environments is required.
Job Description
Must have Skill Sets
- Go lang + Microservices
- Familiarity with MAC/Linux environment, Shell script
- GRPC ● JavaScript & JSON
- Knowledge of microservices and architecture
- Knowledge of Uber Tech Stack would be a bonus ○ Will ensure candidate who are selected will undergo training on Uber Stack as a part of their induction to Uber
- Basic SQL knowledge
Expectations from the candidate
- Strong hands-on experience in understanding requirements and creating microservices using Go lang..
- Exceptional debugging and problem-solving skills on large codebase
- Be a proactive thinker and demonstrate keen sense to find solutions to challenging problems
- Product sense: Create more than beautiful code. Play a crucial role in choosing what we build and how we build it.
- A penchant for collaboration & a team player: Work cross collaboratively to drive impact across orgs. Be open to candid feedback for improvement. When required step up to the role of a tech-lead to ensure effective coordination and communication
- Independent to explore all the end points in UBER environment and coordinate with different Line of Business to understand the correct microservice for a business use case.
- Ability to convert a high-level PRD into a detailed ERD for execution. Coordinate with business teams to understand the functional requirement and convert it into engineering logic
Primary Skills :
4+ Years with Java
2+ with Microservices
6 months to 1 Year with Golang
Exp : 4+ Years
Location : Bangalore/Hyderabad
Max Budget : 28 Lakhs
End Client : UBER
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To be the right fit, you'll need:
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Work on the internal tools that support analysis runtimes.
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Contribute to open-source static analysis tools.
We’re looking for someone who has:
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Strong foundational knowledge in Computer Science.
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At least 3 years of professional software development experience in Scala and Java.
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Understanding of the nuances of execution of the source code (AST, data flow graphs, etc).
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Familiarity with Scala best practices followed in the industry.
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Native experience with Linux/Unix environment.
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A focus on delivering high-quality code through strong testing practices.
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Skills:
• Self-driven, flexible, and innovative with Outstanding analytical, problem-solving, and
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• Technical Skills:
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• OS
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