Available to hire
Hi, I’m Prajak Sen, a passionate software developer based in Kolkata, India. I specialize in designing and implementing scalable backend systems and microservices using a variety of technologies like Node.js, Java, and Python. I enjoy working collaboratively across teams to build efficient, fault-tolerant systems that solve real-world problems.
With a strong background in cloud deployment, DevOps automation, and AI integration, I am committed to continuous learning and improving system architecture to achieve better scalability, maintainability, and security. Outside of coding, I enjoy leading events and improving my public speaking skills, which help me collaborate effectively with diverse teams.
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Hindi
Advanced
Bengali
Advanced
Javanese
Advanced
Work Experience
Software Developer at TEOCO - AIRCOM
May 1, 2024 - June 8, 2024Developed and maintained the backend of BillTrack using Java, Spring Boot, and Maven. Deployed microservices over Apache Tomcat, configured Jenkins-based CI/CD pipelines, and containerized services with Docker to improve deployment automation and system scalability. Automated log parsing and system diagnostics using Python and Bash; built custom tools for analyzing Apache/Nginx configs. Supported DevOps operations and led RPA initiatives for auto-billing and invoice tracking across hybrid environments.
Java Backend Engineer at Cirkle
May 1, 2023 - June 8, 2024Developed robust and modular Java-based microservices using Spring Boot for scalable event-driven features in Cirkle’s outreach platform. Built and maintained REST APIs ensuring high throughput and low latency, integrated with PostgreSQL and exposed for frontend and mobile consumers. Used Git for version control and contributed to CI/CD workflows for Docker-based deployments in staging and production environments. Worked with containerized services deployed on AWS, assisting with environment configuration, logging, and performance monitoring.
Research Intern at IIT Roorkee
November 1, 2022 - April 30, 2023Collaborated with a team of six researchers to develop a multilingual text recognition and interpretation system, sponsored by the NIC and the MEITY. Devised spelling normalization techniques, named entity recognition (NER), and part-of-speech (POS) tagging for a code-mixed language dataset of over 100,000 entries. Achieved a ROUGE-L score of 0.91667 and an F1 score of 0.93342.
Software Developer at TEOCO - AIRCOM
May 1, 2024 - June 12, 2024Developed and maintained the backend of BillTrack using Java, Spring Boot, and Maven. Deployed microservices over Apache Tomcat, configured Jenkins-based CI/CD pipelines, and containerized services with Docker to improve deployment automation and system scalability. Automated log parsing and system diagnostics using Python and Bash; built custom tools for analyzing Apache/Nginx configs. Supported DevOps operations and led RPA initiatives for auto-billing and invoice tracking across hybrid environments.
Java Backend Engineer at Cirkle
May 1, 2023 - June 12, 2024Developed robust and modular Java-based microservices in this startup using Spring Boot to support scalable event-driven features in Cirkle’s outreach platform. Built and maintained REST APIs ensuring high throughput and low latency, integrated with PostgreSQL and exposed for frontend and mobile consumers. Used Git for version control and contributed to CI/CD workflows for Docker-based deployments in staging and production environments. Worked with containerized services deployed on AWS, assisting with environment configuration, logging, and performance monitoring.
Research Intern at IIT Roorkee
November 1, 2022 - April 30, 2023Collaborated with a team of six researchers to develop a multilingual text recognition and interpretation system, sponsored by the NIC and the MEITY. Devised ingenious spelling normalization techniques, named entity recognition (NER), and part-of-speech (POS) tagging for a code-mixed language dataset of over 100,000 entries. Achieved an impressive ROUGE-L score of 0.91667 and an outstanding F1 score of 0.93342.
Software Developer at TEOCO - AIRCOM
May 1, 2024 - June 27, 2024Designed and implemented scalable, fault-tolerant microservices architecture for BillTrack using Node.js, Express.js, and Python. Followed REST and GraphQL standards for secure and efficient API design in distributed systems. Engineered robust backend components with a focus on system integration across PostgreSQL, MongoDB, and Redis, improving data handling performance via asynchronous programming and query tuning. Deployed applications on AWS EC2, automated infrastructure provisioning with Docker, and managed S3 and SQS operations. Built CI/CD pipelines with GitHub Actions and collaborated with AI/ML teams on data-driven automation pipelines. Monitored systems with Prometheus and performed fault resolution. Contributed to system-level architectural design enhancing scalability, maintainability, and security, and participated in documentation and cross-functional design reviews.
Java Backend Engineer at Cirkle
May 1, 2023 - June 27, 2024Developed distributed backend services using Java, Spring Boot, and PostgreSQL aligned with modern microservices architecture. Implemented scalable, low-latency REST APIs with clear interface contracts and robust error handling. Deployed containerized services on AWS using Docker, assisted with environment configuration, monitoring, and issue resolution. Supported staging and production rollouts through DevOps pipelines. Worked closely with frontend teams using React.js and Tailwind CSS for seamless API integration, debugging issues across the stack to improve application stability and user experience. Used Git for version control and contributed to CI/CD processes, employing shell scripts and configuration management to support automated deployment and software lifecycle enhancements.
Full Stack Developer – Node.js & React.js at Jurisphere.AI
October 1, 2022 - May 31, 2023Built enterprise-grade single-page applications using React.js with Tailwind CSS for fast and responsive UI design. Designed and deployed robust backend services via Express.js and Node.js prioritizing performance and security. Integrated JWT-based authentication and role-based access control for administrative and end-user portals. Collaborated within agile sprints and automated deployments using GitHub Actions and Docker in staging and production environments.
Education
B.Tech. at Institute of Engineering and Management
August 1, 2020 - June 30, 2024B.Tech. at Institute of Engineering and Management
August 1, 2020 - June 30, 2024B.Tech. at Institute of Engineering and Management
August 1, 2020 - June 30, 2024Qualifications
AWS certified cloud practitioner
January 11, 2030 - June 17, 2025AWS certified cloud practitioner
January 1, 2023 - December 31, 2023GATE Qualified
January 1, 2023 - December 31, 2023GATE Qualified
January 1, 2024 - December 31, 2024GATE Qualified
January 1, 2025 - December 31, 2025AWS certified cloud practitioner
January 11, 2030 - June 30, 2025Industry Experience
Software & Internet, Telecommunications, Government, Financial Services, Education, Professional Services
Built a Finite State Automata-enhanced domain-specific LLM using
Spark, GraphX, and AWS services like Bedrock Amplify. Integrated RAG and chunkin
Hire a DevOps Developer
We have the best devops developer experts on Twine. Hire a devops developer in Kolkata today.