Jan 2019 – Feb 2023 · 4 yrs 1 mo · India · On-site

• Working Domain : LTE EPC Technology (Networking)
• Key Responsibilities:
• Working on LTE 3gpp core network feature development, enhancement and bug fixing of open-source LTE EPC core network, Magma, and enhancement of open-source S1AP/RAN Simulator (Mostly on S1AP/NAS/GTP/GRPC), Code Reviews and product stability enhancement by debugging and fixing 3GPP issues
• End-to-end development and testing of VoLTE with open-source IMS using both real UEs and simulated UEs/SIP clients.
• Worked on LTE EPC Core Network to develop cloud-based EPC solution in a microservice based architecture keeping in mind the auto-scaling of node components and modularity of Network functions using containers

Oct 2017 – Jan 2019 · 1 yr 3 mos · Bangalore, Karnataka, India

• Working Domain : 5G / LTE EPC Technology (Networking), EC-GSM in IoT (Telecom)
• Key Responsibilities:
• Worked as outsourced R&D developer at Samsung R&D India for LTE EPC Simulator development (Majorly with MME, SGW, PGW nodes and for S1AP, GTP and NAS protocols) and upgradation of product as per 5G technology
• Prepare LTE EPC core setup using OAI (Open Air Interface)
• Develop EC-GSM core on ported GSM DSP from CEVA to MIPS architecture for a renowned wireless firm

Apr 2016 – Oct 2017 · 1 yr 6 mos · Kolkata, West Bengal, India

• Working Domain: LTE EPC Technology (Networking) – Product Based Development
• Key Responsibilities:
• As part of NetEPC team, developed real life deployable EPC solution with various LTE nodes MME, SGW, PGW, HSS, SPR, PCRF, OCS, OFCS, MMELB. Worked majorly on feature development in nodes over protocols like S1AP, GTP, Diameter. Leading NMS team, coordinating with multiple development teams along with guiding CSO team to tackle serious client issues and QA Engineers to develop their test plans.
• Enhanced NetCLI & NetConsole to interact with different LTE EPC nodes running at different collocated & remote servers, developed SOAP APIs for client-server communication, shell scripts and Linux utilities for automating compilation of nodes, installing Linux and kernel packages, making executables, and assembling product packages
• Implemented SPR Synchronization, Scheduled & Graceful Product Upgrade/Rollback Feature while providing uninterrupted network operations & services to the subscriber, Generating Alarms/Traps for exceeding system thresholds & many more
• Worked with Licensing module for License validations and to generate License Expiry Warnings for our product, implemented efficient error handlings, introduced security checks, and enhanced product’s speed & efficiency by code optimization

Jul 2014 – Mar 2016 · 1 yr 8 mos · Kolkata, West Bengal, India

• Working Domain: LTE EPC Technology (Networking) – Product Based Development
• Key Responsibilities:
• As part of NetEPC team, developed real life deployable EPC solution with various LTE nodes MME, SGW, PGW, HSS, SPR, PCRF, OCS, OFCS, MMELB. Worked majorly on feature development in nodes over protocols like S1AP, GTP, Diameter. Leading NMS team, coordinating with multiple development teams along with guiding CSO team to tackle serious client issues and QA Engineers to develop their test plans.
• Enhanced NetCLI & NetConsole to interact with different LTE EPC nodes running at different collocated & remote servers, developed SOAP APIs for client-server communication, shell scripts and Linux utilities for automating compilation of nodes, installing Linux and kernel packages, making executables, and assembling product packages
• Implemented SPR Synchronization, Scheduled & Graceful Product Upgrade/Rollback Feature while providing uninterrupted network operations & services to the subscriber, Generating Alarms/Traps for exceeding system thresholds & many more
• Worked with Licensing module for License validations and to generate License Expiry Warnings for our product, implemented efficient error handlings, introduced security checks, and enhanced product’s speed & efficiency by code optimization

Apr 2013 – May 2014 · 1 yr 1 mo · Kolkata, West Bengal, India

• To manage and schedule HITK ACM Chapter meetings as well as conferences and talks with different organizations and professors from some reputed Institutes. To keep track of chapter activities, minutes of meeting and to co-ordinate chapter members.

Jan 2012 – Mar 2013 · 1 yr 2 mos · Kolkata, West Bengal, India

• We used Wordpress for HITK ACM Chapter's website, where my key responsibilities were to enhance website's theme & contents, publish blogs and update the chapter's website with members' details, events, workshops & seminars

Mar 2012 – May 2014 · 2 yrs 2 mos · Kolkata Area, India

• I was in the core website development committee of my college's student's council. Developed attractive websites with full of animation effects for Dakshh (the HITK techno management fest) & Eclecia (the HITK cultural management fests).