Sumit Kar

Software Engineer

Hyderabad, Telangana, India13 yrs experience
Highly StableAI Enabled

Key Highlights

  • Over 10 years of experience in scalable software systems.
  • Expert in backend development and microservices architecture.
  • Strong focus on AI integration and performance optimization.
Stackforce AI infers this person is a Backend and Microservices Architect in the SaaS industry.

Contact

LinkedIn

Skills

Core Skills

NestjsJava DevelopmentArtificial Intelligence (ai)Large Language Models (llm)DevopsTechnical LeadershipJavaAgile MethodologiesCybersecurityComputer Science

Other Skills

TypeScriptRetrieval-Augmented Generation (RAG)LangGraphLangChainApache KafkaScrumWeb ServicesReliabilityOrganization SkillsKubernetesCI/CDTomcatXMLSpring FrameworkCascading Style Sheets (CSS)

About

I am a Staff Engineer with over 10+ years of experience in designing, building, and optimising scalable, resilient software systems and enterprise SaaS platforms. My expertise spans backend development, microservices architecture, and cloud-native solutions. I have successfully delivered high-performance applications at companies like UKG, Cisco, BroadSoft and Zuora, driving innovation, system efficiency, and business value. I specialize in Java, Spring Boot, TypeScript, NestJS, RESTful API development, and microservices design. I have a strong focus on building secure, reliable, and high-availability systems using Docker, Jenkins, Postgres, MongoDB, Elasticsearch, and related technologies. I am passionate about integrating AI and large language models (LLMs) into backend architectures, exploring tools like LangGraph, LangChain, RAG, and Gemini to create intelligent solutions. In addition to system design and development, I have strong experience in resilience engineering and chaos testing using Gremlin, ensuring systems can withstand failures and recover gracefully. I actively conduct performance and load testing using tools like k6, Gatling, JMeter, and Lighthouse to optimize system throughput, latency, and scalability. I am dedicated to clean coding, performance optimization, and technical leadership. I thrive in collaborative environments where continuous learning, knowledge sharing, and mentoring are valued. I am always eager to explore new technologies and contribute to projects that solve complex business challenges. Key skills: Java, Spring Boot, TypeScript, NestJS, NodeJS, Python, Go, Docker, Postgres, MongoDB, Elasticsearch, Jenkins, Grafana, Ansible, REST APIs, Microservices Architecture, Cloud-native Development, LLMs, LangChain, LangGraph, RAG, AI integration, SaaS Platforms, CI/CD, Agile, Technical Leadership

Experience

Ukg

Staff Software Engineer

Jun 2024 – Present · 1 yr 9 mos · Delhi, India · On-site

  • Architected and implemented backend services using NestJS and TypeScript, focusing on clean code, modular design, and scalability, focusing on SOLID principles.
  • Integrated large language models (LLMs) into workflows using LangChain, LangGraph, RAG, and Gemini, enabling AI-powered features and automation.
  • Built retrieval-augmented generation (RAG) pipelines to deliver context-aware and relevant AI responses.
  • Developed of A2A interfaces and Agent UI components for seamless cross-system integrations with Backstage.
  • Managed Kubernetes-based deployments to ensure scalability, fault tolerance, and high availability of services across environments.
  • Applied DevOps best practices including CI/CD automation, infrastructure-as-code, and container orchestration.
  • Developed and maintained CI/CD pipelines using GitHub Actions (GHA), ensuring rapid and reliable deployments.
  • Conducted resilience and chaos testing using Gremlin, enhancing system robustness against failures.
  • Performed load and performance testing using k6, Gatling and Lighthouse, ensuring systems meet SLA requirements under stress.
  • Collaborated with architects, DevOps, and product teams to drive architectural decisions, security best practices, and operational excellence.
NestJSTypeScriptLarge Language Models (LLM)Artificial Intelligence (AI)Retrieval-Augmented Generation (RAG)LangGraph+8

Zuora

Software Engineer III

Jun 2022 – Feb 2024 · 1 yr 8 mos · Chennai, Tamil Nadu, India · Hybrid

  • Areas Handled: Payment Processing Optimization & Customer Experience Enhancement, API & Data Solution Engineering, Code Quality Assurance & Testing, Issue Resolution, Performance Monitoring/Enhancement, Continuous Learning/Improvement
  • Collaborated with the Payments team to optimize workflows and elevate customer (tenant) experiences, resulting in a substantial decrease in onboarding time for new payment gateways.
  • Developed REST APIs and ensured their robustness by employing jMeter for rigorous data testing.
  • Implemented comprehensive unit tests and conducted meticulous reviews to prevent software regression.
  • Analyzed system logs to swiftly and effectively tackle intricate customer problems.
  • Utilized Grafana for monitoring application performance metrics and implementing targeted optimizations.
  • Advocated for knowledge expansion through organizing engaging tech talks, fostering continuous learning and improvement.
Agile MethodologiesJavaTomcatComputer ScienceXMLSpring Framework+12

Cisco

Software Engineer

May 2018 – Jun 2022 · 4 yrs 1 mo · Greater Chennai Area · On-site

  • Areas Handled: Network Testing Tool Dev, Desk Phone Log Enhancement, Microservices Dev, Jenkins Job Management, Web Security Implementation, Code Review Processes, Multi-node Deployment, Docker Image Security, Call Quality Monitoring
  • Developed a comprehensive Network Testing Tool with Java, JavaScript, and WebRTC, empowering efficient network infrastructure optimization through intuitive web-based interfaces.
  • Enhanced desk phone log collection through dedicated tools, facilitating streamlined data retrieval and insightful troubleshooting for improved performance.
  • Contributed to microservices development with Java, NodeJS, Python & GoLang, fostering agility in software deployment.
  • Designed user-friendly portals with Angular, enabling seamless navigation and interaction with complex data.
  • Managed Jenkins jobs for continuous integration, ensuring rapid and reliable software delivery while upholding code integrity.
  • Implemented robust security measures in web security, safeguarding sensitive data from cyber threats.
  • Strengthened product integrity through rigorous code review processes, promoting quality and maintainability.
  • Orchestrated multi-node deployment with Docker Swarm, optimizing resource utilization and application availability.
  • Secured Docker images using Ansible, fortifying container environments against vulnerabilities.
  • Developed Python-based threshold alerts for call quality monitoring, enabling proactive issue resolution.
Agile MethodologiesJavaCybersecurityPythonComputer ScienceXML+20

Broadsoft

Software Engineer

Jul 2016 – May 2018 · 1 yr 10 mos · Chennai Area, India

  • Areas Handled: Java-based REST APIs, Device Provisioning Portal, Dashboard Optimization, Microservices Deployment, Comprehensive Testing
  • Engineered robust Java-based REST APIs to facilitate seamless data retrieval from MySQL and Elasticsearch databases.
  • Created a dynamic Device Provisioning Portal with Java, JavaScript, jQuery, HTML5, and CSS3, enhancing user interaction.
  • Improved dashboard load time 110% through optimization, enhancing user experience & efficiency data visualization.
  • Orchestrated the deployment of system components as microservices using Docker, enabling flexible scalability and resource utilization while streamlining the deployment process.
  • Executed comprehensive testing procedures including JUnit, Gatling, and JMeter to ensure both functionality and performance integrity, providing robust validation for system stability and scalability.
Computer ScienceXMLCommunicationWeb ServicesScrumReliability

Novatree esolutions

Internship

Jan 2016 – Apr 2016 · 3 mos · Kolkata · On-site

  • Responsive Web Design: Created responsive websites using HTML5, CSS3, JavaScript, PHP (Laravel) and Drupal CMS, ensuring seamless user experiences across various devices and screen sizes.
  • NoSQL Data Processing: Enhanced MongoDB data processing efficiency by 25%.
Computer ScienceXMLWeb Services

Swami vivekananda institute of science and technology

President of Tech Club - Innovention

Nov 2012 – Jun 2016 · 3 yrs 7 mos · Kolkata, West Bengal, India · On-site

Education

Narsee Monjee Institute of Management Studies, Mumbai

Postgraduate Degree — Information Technology and Systems Management

Jan 2020 – Jan 2022

Swami Vivekananda Institute of Science & Technology

Bachelor of Technology - BTech — Computer Engineering

Jul 2012 – Jul 2016

A. K. Ghosh Memorial School - India

WBCHSE — Science

Jan 1996 – Jan 2012

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