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Software engineer with 13+ years building and testing scalable web and client/server applications. Deep expertise in Node.js, Python, JavaScript, and TypeScript, delivering modern backend services and REST/GraphQL APIs with strong architectural discipline. Proven full-stack capability using React, Vue, and Angular to create high-performance SPAs and responsive UIs with TailwindCSS/Bootstrap. Strong Python background for backend engineering, automation, and data/ML workloads on Linux/Unix. Hands-on AI/ML and LLM integrations using PyTorch/TensorFlow/Keras plus OpenAI and Stability AI APIs. Cloud-native delivery on AWS and Azure (compute, storage, messaging, monitoring, data services). Quality-focused with Jest, React Testing Library, and Cypress/Cucumber for CI-ready automation. Experienced in data visualization (D3, Plotly, Tableau), databases (SQL/NoSQL), optimization, migrations, and collaborative SDLC practices with Git and JIRA.…Software engineer with 13+ years building and testing scalable web and client/server applications. Deep expertise in Node.js, Python, JavaScript, and TypeScript, delivering modern backend services and REST/GraphQL APIs with strong architectural discipline. Proven full-stack capability using React, Vue, and Angular to create high-performance SPAs and responsive UIs with TailwindCSS/Bootstrap. Strong Python background for backend engineering, automation, and data/ML workloads on Linux/Unix. Hands-on AI/ML and LLM integrations using PyTorch/TensorFlow/Keras plus OpenAI and Stability AI APIs. Cloud-native delivery on AWS and Azure (compute, storage, messaging, monitoring, data services). Quality-focused with Jest, React Testing Library, and Cypress/Cucumber for CI-ready automation. Experienced in data visualization (D3, Plotly, Tableau), databases (SQL/NoSQL), optimization, migrations, and collaborative SDLC practices with Git and JIRA.

Sagar Neupane

Full Stack Developer, Back-End Developer, Web Developer, +2

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Software engineer with 13+ years building and testing scalable web and client/server applications. Deep expertise in Node.js, Python, JavaScript, and TypeScript, delivering modern backend services and REST/GraphQL APIs with strong architectural discipline. Proven full-stack capability using React, Vue, and Angular to create high-performance SPAs and responsive UIs with TailwindCSS/Bootstrap. Strong Python background for backend engineering, automation, and data/ML workloads on Linux/Unix. Hands-on AI/ML and LLM integrations using PyTorch/TensorFlow/Keras plus OpenAI and Stability AI APIs. Cloud-native delivery on AWS and Azure (compute, storage, messaging, monitoring, data services). Quality-focused with Jest, React Testing Library, and Cypress/Cucumber for CI-ready automation. Experienced in data visualization (D3, Plotly, Tableau), databases (SQL/NoSQL), optimization, migrations, and collaborative SDLC practices with Git and JIRA.…Software engineer with 13+ years building and testing scalable web and client/server applications. Deep expertise in Node.js, Python, JavaScript, and TypeScript, delivering modern backend services and REST/GraphQL APIs with strong architectural discipline. Proven full-stack capability using React, Vue, and Angular to create high-performance SPAs and responsive UIs with TailwindCSS/Bootstrap. Strong Python background for backend engineering, automation, and data/ML workloads on Linux/Unix. Hands-on AI/ML and LLM integrations using PyTorch/TensorFlow/Keras plus OpenAI and Stability AI APIs. Cloud-native delivery on AWS and Azure (compute, storage, messaging, monitoring, data services). Quality-focused with Jest, React Testing Library, and Cypress/Cucumber for CI-ready automation. Experienced in data visualization (D3, Plotly, Tableau), databases (SQL/NoSQL), optimization, migrations, and collaborative SDLC practices with Git and JIRA.

Available to hire

Software engineer with 13+ years building and testing scalable web and client/server applications. Deep expertise in Node.js, Python, JavaScript, and TypeScript, delivering modern backend services and REST/GraphQL APIs with strong architectural discipline. Proven full-stack capability using React, Vue, and Angular to create high-performance SPAs and responsive UIs with TailwindCSS/Bootstrap. Strong Python background for backend engineering, automation, and data/ML workloads on Linux/Unix. Hands-on AI/ML and LLM integrations using PyTorch/TensorFlow/Keras plus OpenAI and Stability AI APIs. Cloud-native delivery on AWS and Azure (compute, storage, messaging, monitoring, data services). Quality-focused with Jest, React Testing Library, and Cypress/Cucumber for CI-ready automation. Experienced in data visualization (D3, Plotly, Tableau), databases (SQL/NoSQL), optimization, migrations, and collaborative SDLC practices with Git and JIRA.

Skills

Experience Level

Expert

Expert

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Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Software Developer at Gainwell Technologies

May 1, 2019 - Present

Built ETL/data pipelines from scratch, integrating multiple data sources using Docker, Kafka, Kafka Connect, and Debezium; designed modern data integration workflows and migrations; led end-to-end development of web applications using Node.js/TypeScript/JavaScript with React and Vue; implemented microservices with REST/GraphQL APIs; developed backend services in Node.js and Python; deployed cloud solutions on AWS/Azure with CI/CD; integrated LLM-powered features using OpenAI APIs; built dashboards with D3/Tableau/Plotly; performed data profiling and transformation across CRM/ERP/finance sources; wrote automated tests (Jest, React Testing Library); enabled reliable data streaming for analytics.

Machine Learning Developer at United Health Group (Optum)

January 1, 2018 - April 30, 2019

Specialized in Python-based ML/AI development for applied modeling, experimentation, data mining, and visualization; designed LLM-enabled web apps by integrating LangChain with backend services; built API-driven applications for document Q&A, summarization, extraction, classification, and agent/tool calls; delivered NLP, computer vision, fintech analytics, ad-revenue prediction, and time-series modeling; implemented CV pipelines (YOLO/MobileNet); created interactive visualizations with Plotly; produced client-ready prototypes and deliverables; wrote automated tests (Jest/Cucumber); supported performance-critical components with C/C++.

Full Stack Developer at Tennessee Department of Public Health

June 1, 2015 - December 31, 2017

Delivered scalable web features in Agile teams; built high-performance web apps using Node.js (TypeScript/JavaScript), React, and Vue; implemented REST APIs with Express/NestJS; designed microservices and service integrations; deployed and operated cloud-based services with monitoring and observability; automated deployments with CI/CD; containerized deployments with Docker/Kubernetes; developed shared npm libraries and modernized frontend code; integrated backend with ERP/DB layers (PostgreSQL, MongoDB, Couchbase); implemented API testing with Postman; enforced security best practices and data integrations for enterprise systems; built and published internal docs.

Java Developer at Aetna

February 1, 2014 - April 30, 2015

Gathered requirements; built enterprise apps using Java, Spring Core/MVC, and Hibernate; implemented REST/SOAP services with CXF; designed XML/XSD/JAXB mappings; built messaging integrations with JMS/ActiveMQ and Apache Camel; used Maven for builds and Jenkins for CI; pre-tested endpoints with SoapUI; wrote unit/integration tests with JUnit and mocks; supported Node.js/Python utilities for automation; built REST APIs and NoSQL data stores (MongoDB) as needed for modules.

Jr Java Developer at Sharp Healthcare

May 1, 2013 - December 31, 2014

Developed backend modules with Java/Spring MVC/Boot; built REST endpoints; supported frontend with ES6 JS (React/Vue) and Tailwind; implemented SOAP/REST integrations, JMS messaging, XML/XSD/JAXB mappings; created build/deploy pipelines with Maven/Jenkins; collaborated on UAT, defects, and release cycles; maintained code quality with unit tests (JUnit) and integration tests; supported adjacent Node.js/Python utilities; leveraged MongoDB for selected modules.