Biswajit Sarkar

Java & Backend Developer • 14+ Years Experience

Copenhagen, DK.

About

Results-driven software engineer specializing in telecom and IoT connectivity platforms. With over 14 years of experience, Biswajit has played critical roles in developing, automating, and maintaining mission-critical systems, including national number portability platforms and SIM ordering automation. Known for reliability, collaboration, and deep technical expertise.

Work

Velos IoT

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Software Developer (Java & Backend Developer)

Copenhagen, Capital Region, Denmark

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Summary

Developed and maintained core telecom and IoT connectivity systems within a Connectivity Management Platform. Automated SIM ordering & manufacturing workflows and supported national-level Number Portability Platforms (e.g., Denmark OCH, Serbia RATEL, bespoke gateway for TDC).

Highlights

Led automation of SIM ordering and manufacturing processes within the connectivity platform, significantly improving operational efficiency and reliability.

Contributed to the Central Number Portability platforms in Denmark (OCH) and Serbia (RATEL), and implemented a bespoke number portability gateway for TDC—systems critical to telecom infrastructure.

Consistently recognized by managers for reliability, attention to detail, and ability to drive collaboration across stakeholders.

Tata Consultancy Services (TCS)

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IT Analyst (Data Analyst)

Mumbai, Maharashtra, India

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Summary

Performed data analysis and IT support, delivering insights for operational improvements across client projects.

Tata Consultancy Services (TCS)

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Systems Engineer (Software)

Kolkata, West Bengal, India

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Summary

Engaged in software engineering tasks, contributing to application development and system enhancements.

Vistrit Infotech

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Lead Analyst

Kolkata, West Bengal, India

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Summary

Oversaw analysis functions, leading a small team towards delivering analytical insights.

Vistrit Infotech

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System Analyst

Kolkata, West Bengal, India

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Summary

Functional analysis and system support within enterprise software projects.

Vistrit Infotech

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Software Developer

Kolkata, West Bengal, India

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Summary

Developed software modules and supported backend functionalities.

Education

West Bengal University of Technology, Kolkata

Kolkata, West Bengal, India
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Bachelor of Technology Technology / Engineering

Skills

Telecom & IoT Connectivity

SIM ordering automation, Number Portability Platforms.

Java Backend Development

Spring Framework, Microservices, Hibernate, J2EE.

Cloud & DevOps

Docker, Kubernetes, Prometheus, Grafana, AWS.

Database Systems

MySQL, MongoDB, PostgreSQL, Oracle.

Workflow & Process Automation

Activiti, JBPM, Oracle SOA Suite, Business Process Workflow.