Senior Full Stack Developer

Led end-to-end development of workflow automation features for a B2B SaaS platform serving 500+ enterprise clients, reducing manual data entry by 70% through smart form logic and API integrations. Integrated LLM-powered features using OpenAI and Anthropic APIs to auto-extract structured data from unstructured client documents, improving onboarding speed by 50%. Built responsive UIs using React, TypeScript, and Tailwind CSS, improving Lighthouse performance scores from 62 to 94 via code splitting, lazy loading, and optimized asset delivery. Designed and deployed RESTful APIs in Node.js/Nest.js and Python/FastAPI, integrated with PostgreSQL; reduced average API response time by 40% through query optimization and indexing. Containerized services with Docker and orchestrated deployments on AWS (EC2, RDS, S3) using GitHub Actions CI/CD, enabling zero-downtime releases and automated rollback. Collaborated daily with product and design in Agile sprints; conducted code reviews and mentored junior engineers on testing best practices and component architecture.

Owned the full-stack rebuild of a legacy customer portal serving 10K+ users, migrating from jQuery to React + Redux, which cut frontend bug reports by 60% and improved load times by 2.5x. Prototyped and shipped an AI copilot feature using LangChain and OpenAI to summarize support tickets and suggest routing rules, reducing triage time by 35%. Developed secure .NET Core microservices in C# with SQL Server, implementing RBAC and JWT-based authentication that maintained zero security incidents over 18 months of production use. Engineered real-time inventory dashboards using WebSockets and Chart.js, enabling supply chain teams to track live shipment status and reduce fulfillment delays by 25%. Established automated test coverage using Jest (frontend) and xUnit (backend), maintaining 85%+ code coverage across all critical user flows. Used AI-assisted debugging and test generation to improve QA velocity and reduce regression bugs in sprint cycles.

Designed and deployed an internal logistics management system using Angular, ASP.NET MVC, and SQL Server, reducing average shipment processing time by 35% through streamlined UI workflows. Optimized complex SQL queries and implemented strategic indexing on high-volume tables, decreasing report generation time from 12 seconds to under 2 seconds. Integrated the application with a third-party ERP system via RESTful APIs, enabling automated sync of 200+ daily transactions with error logging and retry mechanisms. Created reusable Angular components and enforced consistent styling with Bootstrap, improving team velocity and reducing UI inconsistency bugs by 50%. Documented system architecture and trained non-technical staff on daily operations, reducing support tickets by 40%.

Developed browser-based multiplayer mini-games using Phaser 3, PixiJS, and Socket.IO, supporting real-time player interaction for audiences of 10K+ monthly active users. Built a Node.js backend to manage user sessions, leaderboards, and persistent game progress stored in MongoDB, with JWT authentication and rate limiting. Optimized rendering performance using texture atlases, delta-time updates, and object pooling, achieving stable 60 FPS even on low-end mobile devices. Collaborated with designers to translate Figma mockups into interactive prototypes and iterated based on playtest feedback to improve engagement metrics.

Assisted in building UI components and debugging gameplay logic for educational web games using JavaScript, HTML5 Canvas, and basic game loops. Wrote unit tests for game state transitions and supported cross-browser compatibility testing across major desktop and mobile platforms. Gained hands-on experience with Git workflows, Agile stand-ups, and Jira task tracking in a fast-paced game development environment.