Senior Full-Stack JavaScript Engineer (Freelance) (Enterprise AI Workflow Deployment Platform)
Duration: 2018 — Present
Summary:- Developed a Node
- js/TypeScript backend and Vue
- js frontend platform enabling enterprise clients to configure and deploy custom AI agents and document-processing workflows
- The platform supports complex AI workflow automation tailored for enterprise needs
Responsibilities:- Architected and delivered full-stack platforms from scratch, owning design decisions and feature delivery.
- Built integration layers between SaaS platforms and client CRMs, ERPs, and internal APIs.
- Integrated LLM-based AI features using OpenAI and Anthropic APIs for AI workflow automation and natural-language data processing.
- Designed and optimized PostgreSQL schemas and queries for complex enterprise data models.
- Optimized Node.js performance by profiling event loop bottlenecks and improving async concurrency.
- Led technical discussions with non-technical stakeholders to explain architecture and implementation.
- Deployed solutions on AWS and Azure, built CI/CD pipelines with GitHub Actions, and containerized services with Docker.
- Contributed to open-source tooling and maintained developer documentation.
Technologies: Node.js, TypeScript, Vue.js 3, Nuxt.js, Pinia/Vuex, PostgreSQL, MySQL, Redis, AWS (Lambda, RDS, EC2, S3), Azure, OpenAI API, Anthropic API, Docker, GitHub Actions, CI/CD, Infrastructure as Code, REST, GraphQL, microservices
Senior Full-Stack JavaScript Engineer (Freelance) (SaaS CRM/ERP Integration & Customization Engine)
Duration: 2018 — Present
Summary:- Implemented a configurable integration layer connecting SaaS platforms to client CRMs and ERPs, enabling custom field mappings, workflow triggers, and role-based access for hierarchical enterprise teams
- This engine facilitates seamless data exchange and process automation between enterprise systems
Responsibilities:- Developed integration layers to connect SaaS platforms with various client CRMs and ERPs.
- Translated business requirements into modular, repeatable deployment patterns.
- Implemented custom field mappings, workflow triggers, and role-based access controls.
- Ensured scalability and maintainability of integration solutions across multiple clients.
Technologies: Node.js, TypeScript, REST APIs, PostgreSQL, SaaS platforms, CRM and ERP systems
Senior Full-Stack JavaScript Engineer (Freelance) (PostgreSQL Performance Engineering (50M+ row SaaS DB))
Duration: 2018 — Present
Summary:- Addressed critical performance issues on a large-scale SaaS PostgreSQL database with over 50 million rows
- Applied advanced query optimization techniques to improve database responsiveness and scalability without altering the schema
Responsibilities:- Analyzed and optimized complex SQL queries using EXPLAIN and ANALYZE tools.
- Implemented materialized views, partial indexes, and query restructuring to enhance performance.
- Managed connection pooling and monitoring-layer diagnostics beyond indexing.
Technologies: PostgreSQL, EXPLAIN, ANALYZE, materialized views, indexing, query optimization
Senior Full-Stack JavaScript Engineer (Freelance) (AI Document Intelligence Tool (LLM + Vue.js))
Duration: 2018 — Present
Summary:- Developed an AI-powered document intelligence system that ingests enterprise knowledge bases and enables natural-language querying over structured and unstructured data
- The tool provides a clean Vue
- js interface designed for non-technical end users
Responsibilities:- Integrated large language models (LLMs) to process and query enterprise knowledge bases.
- Designed and implemented a user-friendly frontend using Vue.js for natural-language interaction.
- Ensured seamless ingestion and indexing of diverse data types for effective querying.
Technologies: Vue.js, OpenAI API, Anthropic API, Node.js, TypeScript
Upstaffer since June, 2026
