
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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Requirements
• Extensive and expert programming experience in at least one general programming language (e. g.
Java, C, C++) & tech stack to write maintainable, scalable, unit-tested code.
• Experience with multi-threading and concurrency programming.
• Extensive experience in object oriented design skills, knowledge of design patterns, and a huge passion
and ability to design intuitive modules and class-level interfaces.
• Excellent coding skills - should be able to convert design into code fluently.
• Knowledge of Test Driven Development.
• Good understanding of databases (e. g. MySQL) and NoSQL (e. g. HBase, Elasticsearch, Aerospike etc).
• Strong desire to solve complex and interesting real world problems.
• Experience with full life cycle development in any programming language on a Linux platform.
• Go-getter attitude that reflects in energy and intent behind assigned tasks.
• Worked in a startup-like environment with high levels of ownership and commitment.
• BTech, MTech or Ph. D. in Computer Science or related technical discipline (or equivalent).
• Experience in building highly scalable business applications, which involve implementing large complex
business flows and dealing with huge amounts of data.
• 3+ years of experience in the art of writing code and solving problems on a large scale.
• Open communicator who shares thoughts and opinions frequently, listens intently, and takes
constructive feedback.
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
Database Administrator Lead - PostgreSQL
ABOUT Ashnik
Established in 2009, Ashnik is a leading open-source solutions and consulting company in South East Asia and India, headquartered in Singapore. We enable digital transformation for large enterprises through our design, architecting, and solution skills. Over 100 large enterprises in the region have acknowledged our expertise in delivering solutions using key open-source technologies. Our offerings form critical part of Digital transformation, Big Data platform, Cloud and Web acceleration and IT modernization. We represent EDB, Pentaho, Docker, Couchbase, MongoDB, Elastic, NGINX, Sysdig, Redis Labs, Confluent, and HashiCorp as their key partners in the region. Our team members bring decades of experience in delivering confidence to enterprises in adopting open source software and are known for their thought leadership.
THE POSITION
Ashnik is looking for talented and passionate people to be part of the team for an upcoming project at client location.
RESPONSIBILITIES
· Monitoring database performance
· Optimizing Queries and handle escalations
· Analyse and assess the impact and risk of low to medium risk changes on high profile production databases
· Implement security features
· DR implementation and switch over
QUALIFICATION AND EXPERIENCE
· Preferably have a working experience of 4 Years and more , on production PostgreSQL DBs.
· Experience of working in a production support environment
· Engineering or Equivalent degree
· Passion for open-source technologies is desired
ADDITIONAL SKILLS
· Install & Configure PostgreSQL, Enterprise DB
· Technical capabilities PostgreSQL 9.x, 10.x, 11.x
· Server tuning
· Troubleshooting of Database issues
· Linux Shell Scripting
· Install, Configure and maintain Fail Over mechanism
· Backup - Restoration, Point in time database recovery
· A demonstrable ability to articulate and sell the benefits of modern platforms, software and technologies.
· A real passion for being curious and a continuous learner. You are someone that invests in yourself as much as you invest in your professional relationships.
LOCATION: Bangalore & Mumbai
Experience: 7 yrs plus
Package: upto 20 LPA

Loc: Chennai, Bangalore,Pune,JaipurEXP: 5 yrs to 8 yrs
- Implement best practices for the engineering team across code hygiene, overall architecture design, testing, and deployment activities
- Drive technical decisions for building data pipelines, data lakes, and analyst access.
- Act as a leader within the engineering team, providing support and mentorship for teammates across functions
- Bachelor’s Degree in Computer Science or equivalent job experience
- Experienced developer in large data environments
- Experience using Git productively in a team environment
- Experience with Docker
- Experience with Amazon Web Services
- Ability to sit with business or technical SMEs to listen, learn and propose technical solutions to business problems
· Experience using and adapting to new technologies
· Take and understand business requirements and goals
· Work collaboratively with project managers and stakeholders to make sure that all aspects of the project are delivered as planned
· Strong SQL skills with MySQL or PostgreSQL
- Experience with non-relational databases and their role in web architectures desired
Knowledge and Experience:
- Good experience with Elixir and functional programming a plus
- Several years of python experience
- Excellent analytical and problem-solving skills
- Excellent organizational skills
Proven verbal and written cross-department and customer communication skills
Experience working on waterfall or Agile (Agile model preferred)Solid understanding of Python scripting and/or frameworks like Django, Flask Back up RRS.
Job Description:
- Programming and optimizing rust / wasm based smart contracts
- Design, research and develop blockchain-based solutions
- Developing decentralized high-performance systems
- Building reliable and fast data storages
- Working with virtual machines used by modern blockchains: WebAssembly, EVM, COSMWASM
- Implementing consensus algorithms and other protocols
- Security audits of third-party and internal solutions
- Establishing policies and procedures that produce secure, high-quality software
- Write and review technical proposals
- Improve engineering standards, tooling, and processes
- Coding with concurrency, efficiency and scalability as primary motive
- Document systems, build runbooks, and automate those processes
- Being hands on by writing, testing, and deploying high-performance networking code
- Rigor on clean code, unit testing, code coverage and best practices
- Developing infrastructure software
- Supporting and Leading the team of junior developers.
Required qualifications:
3+ years experience in developing smart contracts, 2.5+ years of experience in Rust, willingness to learn on the go, ability to write clean code, a strong sense of responsibility.
Tech Stack:
Rust, cargo, git, linux, bash, ability to work with Docker.
Nice to have:
cryptography and system software development experience,understanding of design patterns, understanding of operating systems and networks, ability to design algorithms and mathematical models.
Biddano is seeking for an analytical, result driven, multi-skilled candidate for design for the position of Backend Developer. He/She will be responsible for programming languages and tools to analyze current codes and industry developments, formulate more efficient processes, solve problems and create a more seamless experience for users.
The ideal candidate will have strong personal accountability for results, strong commitment to teamwork in support of the company's success, adherence to ethical business practices, and comfort operating in a start-up environment with an ability to prioritize and drive actions to closure.
a start-up environment with an ability to prioritize and drive actions to closure.
Backend Developer
Responsibilities:
- Participate in the entire application lifecycle, focusing on coding and debugging
- Write clean code to develop functional REST APIs Using Django/Python or NodeJs
- Troubleshoot and debug applications
- Perform unit test cases to optimize performance
- Manage cutting-edge technologies to improve legacy applications
- Collaborate with Front-end developers to integrate user-facing elements with server side logic
- Gather and address technical and design requirements
- Provide training and support to internal teams
- Build reusable code and libraries for future use
- Liaise with developers, designers and system administrators to identify new features
- Follow emerging technologies
Skills Required:
- Proven work experience as a Back-end developer
- In-depth understanding of the entire web development process (design, development and deployment)
- Hands on experience with programming languages like Python (Required), typescript(Required), Java.
- Working knowledge of CMS framework
- Familiarity with back-end languages (e.g. HTML, JavaScript and CSS)
- Excellent analytical and time management skills
- Backend:
- Django/DjangoREST, Python (Prefered) or NodeJs.
- Good experience of microservices.
- Hosting and Deployment Solutions:
- Good understanding of AWS which includes(All required):
- Good expertise in Linux.
- EC2 instance management.
- Scalability (Horizontal or Vertical) which includes autoscaling.
- Proper use of S3 for static file management.
- SNS or AWS email service.
- AWS resource cost optimization.
- Proper knowledge of Load Balancers.
- Teamwork skills with a problem-solving attitude
Experience :
- Minimum 4-7 years of experience as a Backend Developer
- B.tech Computer Science, Engineering or similar relevant field







