11+ WAN Jobs in Kolkata | WAN Job openings in Kolkata

Position: Windows SRE

Responsibilities:

• Windows Site Reliability Engineer with experience in managing large websites where Millions of customers hit
• Manage and monitor all installed systems and infrastructure
• Install, configure, test and maintain operating systems, application software and system management tools
• Among your responsibilities will be the installation and configuration of storage, servers, Microsoft servers (Cluster Services, File Services, Active Directory Services, Certificate Authority services), Virtual Infrastructure (Hyper-V), IIS, MS SQL and backup system
• Proactively ensure the highest levels of systems and infrastructure availability
• Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes
• Maintain security, backup, and redundancy strategies
• Write and maintain custom scripts to increase system efficiency and lower the human intervention time on any tasks
• Participate in the design of information and operational support systems
• Provide 2nd and 3rd level support
• Liaise and collaborate with vendors and Zacks personnel for problem resolution, decision making, knowledge sharing

Requirements:

• Minimum 5+ years of Windows support experience, 7, 8, 10, and Microsoft Server (all)
• Windows server expertise
• Familiar with WAN/LAN technologies
• Understanding of the OSI model
• Virtualization - MS Hyper-V, VMware, vSan
• Strong understanding of Internet protocols including HTTP(S), SSL, TCP, IP
• MS IIS administration and configuration
• MS Active Directory
• MS Storage Space
• DNS and DHCP
• SSL certificates and PKI
• Familiar with the ITIL framework
• Strong PowerShell experience
• Information Security experience a plus Other Qualifications
• Excellent attention to detail

Experience: 8-10 years

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)

Responsibilities:

• Inquisitive Research: Conduct extensive market research, identifying problematic areas and solutions to our clients' offerings.
• Strategic Content Planning: Develop an exhaustive content calendar on a weekly/monthly basis, ensuring our clients' narratives are consistently shared on social media handles.
• Meaningful Content Creation: Create meaningful content that promotes different offers and other creative aspects of our clients' stories on social media platforms.
• Campaign Management: Plan and execute social media campaigns to boost brand awareness and engagement, aligning with our clients' narratives.
• Digital Marketing Support: Provide unconditional support to our digital marketing team, assisting them in their day-to-day activities and amplifying our clients' narratives.

You'll Be a Perfect Fit If You Have:

• Inquisitive Nature: You have an inquisitive nature, staying up-to-date with social media trends and exploring innovative ways to increase followers and engagement.
• Enthusiasm: Enthusiasm for social media and content creation, bringing new ideas to enhance our clients' narratives.
• Team Player: You are someone who can take one for the team, collaborating effectively to amplify our clients' stories on social media.

Position: Automation Test Lead

Job responsibilities:

• Should have ability to Design & develop QA Automation Framework from scratch.
• Should have knowledge in API testing using Rest Client.
• Should have knowledge in Load & Stress Testing using JMeter/LoadRunner.
• Should have good exposure with Linux Commands.
• Should have exposure to bug management tools like JIRA/Bugzilla.
• Should have exposure into AGILE model.
• Should have ability to write test cases / test plan.
• Should have strong knowledge in Java/Python.
• Should be familiar with CICD process.
• Exposure to Appium (Good to have)

Job location – Bangalore (1^st pref), Kolkata (2^nd pref)

Years of exp – 5+

CTC – 12 TO 18LPA

Desired Candidate Profile