Usnik Biswas

Bangalore, India | +91 9751220197 | usnikbiswas@gmail.com
LinkedIn | Portfolio

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Professional Summary

Results-driven Backend Software Developer with 4+ years of hands-on experience building and maintaining robust backend systems using Python, Flask, and automation tools. Experienced with multi-language environments, DevOps pipelines, AI-driven chatbot integrations, and cloud deployments. Passionate about solving real-world problems through clean code and scalable architectures.

Technical Skills

Professional Experience

Software Developer – Tech Mahindra

Bangalore, India | Mar 2025 – Present

  • Led GenAI-driven modernization across 1000+ enterprise applications, architecting Large Language Model (LLM) agents to automate codebase remediation, security patching, and architectural refactoring at scale.
  • Developed agentic workflows using Python and LangChain to automate multi-language code translation and logic optimization, reducing manual refactoring effort by 70%.
  • Engineered internal RAG (Retrieval-Augmented Generation) systems to assist developers in navigating and remediating legacy enterprise codebases across Python, PHP, Java, and JS.
  • Built automated prompt engineering pipelines to ensure high-fidelity code generation and integration with enterprise CI/CD systems.
  • Optimized DevSecOps workflows with GenAI-based vulnerability analysis and automated unit test generation, improving overall production reliability.

Backend Developer – StableHacks

Toronto, Canada | May 2023 – Aug 2024

  • Developed and maintained Python/Flask APIs for scalable data access.
  • Built scraping + NLP pipelines (Selenium, NLTK, Spacy) storing in Pinecone.
  • Led OpenAI-powered chatbot development improving UX and support workflows.
  • Deployed/managed services on GCP (Cloud Run, Compute Engine, Functions).
  • Managed VPS hosting APIs, FTP, and Nginx.

Software Developer – Accenture

Chennai, India | Jun 2019 – Jun 2021

  • Maintained backend systems for e-commerce platforms across 16 countries.
  • Built backend modules in PHP integrated with SAP/Magento.
  • Automated data migration with Python, reducing errors and manual effort.

Software Developer Intern – Octalion

Bangalore, India | Dec 2018 – Apr 2019

  • Built secure multi-user authentication system for an education platform.
  • Worked on backend architecture with PHP (CodeIgniter).
  • Led a team of 5 juniors, ensuring code quality and collaboration.

Education