Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Full-stack software engineer with 12+ years of experience building scalable web applications using TypeScript, Node.js, and modern frontend frameworks. I design and deliver production systems that integrate AI/LLM capabilities, including RAG and semantic search, into real-world workflows. I also build and operate cloud-native infrastructure on AWS with Docker and CI/CD pipelines, working across international teams with strong engineering practices, testing, and clear communication in English.…Full-stack software engineer with 12+ years of experience building scalable web applications using TypeScript, Node.js, and modern frontend frameworks. I design and deliver production systems that integrate AI/LLM capabilities, including RAG and semantic search, into real-world workflows. I also build and operate cloud-native infrastructure on AWS with Docker and CI/CD pipelines, working across international teams with strong engineering practices, testing, and clear communication in English.

Sagar Neupane

Full Stack Developer, Software Engineer, Back-End Developer, +2





Full-stack software engineer with 12+ years of experience building scalable web applications using TypeScript, Node.js, and modern frontend frameworks. I design and deliver production systems that integrate AI/LLM capabilities, including RAG and semantic search, into real-world workflows. I also build and operate cloud-native infrastructure on AWS with Docker and CI/CD pipelines, working across international teams with strong engineering practices, testing, and clear communication in English.…Full-stack software engineer with 12+ years of experience building scalable web applications using TypeScript, Node.js, and modern frontend frameworks. I design and deliver production systems that integrate AI/LLM capabilities, including RAG and semantic search, into real-world workflows. I also build and operate cloud-native infrastructure on AWS with Docker and CI/CD pipelines, working across international teams with strong engineering practices, testing, and clear communication in English.

Available to hire

Full-stack software engineer with 12+ years of experience building scalable web applications using TypeScript, Node.js, and modern frontend frameworks. I design and deliver production systems that integrate AI/LLM capabilities, including RAG and semantic search, into real-world workflows.

I also build and operate cloud-native infrastructure on AWS with Docker and CI/CD pipelines, working across international teams with strong engineering practices, testing, and clear communication in English.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Advanced

Work Experience

Senior Full Stack Engineer at The SilverLogic

September 1, 2021 - May 1, 2026

Designed and built scalable AI platform services supporting LLM-powered applications and enterprise workflows using TypeScript, Node.js, Python, and FastAPI. Developed production retrieval-augmented generation (RAG) systems with LLMs, embeddings, vector databases, and document-processing pipelines for intelligent knowledge retrieval. Built and optimized backend services and APIs as well as high-performance frontend applications using React, Next.js, Vue.js, and Nuxt.js with TypeScript. Designed and optimized cloud infrastructure on AWS (ECS, Lambda, S3, RDS, CloudFront) and containerized workloads with Docker. Implemented CI/CD pipelines using GitHub Actions to improve reliability and deployment velocity. Transitioned shipping workflows to near-real-time processing using event-driven patterns (Kafka/RabbitMQ-style integration). Applied testing, monitoring, code review, and production troubleshooting best practices.

Full Stack Engineer at Levvel

August 1, 2018 - July 1, 2021

Integrated automation and AI-driven features into platform workflows, replacing manual steps with automated processes and surfacing insights for product decisions. Built backend data layers capable of scaling under load while supporting real-time access. Designed serverless API architectures to minimize operational overhead while keeping data flow efficient. Conducted code reviews and performance audits to reduce reliability risk. Collaborated with UI designers to maintain consistent interfaces across devices. Improved page speed by 30%, contributing to stronger SEO and a 15% increase in user engagement.

Software Engineer at GE Healthcare

October 1, 2013 - May 1, 2018

Built secure APIs for radiology software used across a network of 200+ hospitals with HIPAA-driven security requirements. Delivered FHIR-based interoperability services connecting radiology systems to hospital EMR platforms and reducing manual reconciliation. Achieved 85% unit and end-to-end test coverage, catching regressions before hospital-facing deployments. Reduced full testing cycles from four days to under one day by expanding automated test coverage. Processed approximately 3 million medical records daily while ensuring compliance. Resolved on-call production issues in an average of 20 minutes to keep incidents short.