▶ Frontend Technical Leadership: Leading frontend architecture and implementation for authentication and authorization experiences across the BILL platform. Driving technical decisions, setting best practices, and mentoring engineers in React-based micro frontend (MFE) development.

▶ Authentication & Authorization Systems: Designing and delivering secure, scalable login and identity flows by integrating in-house and third-party auth solutions, ensuring seamless and secure user access across products.

▶ Cross-System Integration: Collaborating with backend teams to integrate services across Spend & Expense, AP, and AR domains, translating complex backend capabilities into intuitive frontend experiences.

▶ Cross-Functional Leadership: Partnering closely with product, design, and engineering stakeholders to define technical direction, break down complex initiatives, and deliver high-impact, user-centric solutions.

▶ Execution & Mentorship: Leading project execution end-to-end, guiding engineers through implementation, conducting design/code reviews, and elevating overall frontend engineering quality.

▶ Developed and maintained a customer portal and FastTrack product using React.js in the frontend and Go in the backend, improving user experience and increasing efficiency.

▶ Developed core UIs for the FastTrack product, including customer feedback tool, softphone call window, active call page, call history page, user greeting recording & play page, and dashboard admin page that shows statistics of calls and tasks processed.

▶ Involved in all phases of agile including the requirements analysis, architecture design, development, testing, deployment, and ongoing support for GraphQL-based applications and services

▶ Interacted across all backend microservice owners and relevant application holders to understand the requirements of relevant GraphQL APIs and initial resolver implementation

▶ Refactored and re-designed Node.js-based GraphQL server that coordinates the customer requests to buy electric vehicles from web/mobile apps

▶ Successfully set up CI/CD pipelines that automated build, delivery and release of packages into Dev, QA, Stage, and Production environments using Kubernetes and GitLab yaml setup files

▶ Provided leadership as a subject matter expert on all GraphQL issues, CI/CD pipelines, and general upgrades/maintenance of servers

▶ Coordinated the discussion and architecture meetings for GraphQL Federation, and implemented the first GraphQL-federated subgraphs within the team

▶ Educated new hires on GraphQL subjects and provided detailed documentation on server setup, development issues, troubleshoot guides, and etc.

▶ Provided mentorship to junior engineers for the upcoming projects

▶ Designed, developed, and tested backend-level systems to ensure the uninterrupted flow of business-critical operations

▶ Contributed to the development and continuous enhancement of HeyKind backend server using Node.js + Express + Mongo DB(Mongoose) + Postgres SQL(Sequelize)

▶ Designed and implemented AWS Cognito comprising 8 lambda functions for customized authentication system(user backup & restore, user migration, login with email passcode)

▶ Successfully performed authentication system migration from Google Firebase to AWS Cognito by supporting backend DB handling and infrastructure build-up

▶ Successfully migrated backend system database MongoDB to PostgreSQL

▶ Deployed AWS resources(Cognito, lambda functions) using CDK and serverless

▶ Implemented GraphQL interface for faster and flexible data handling between backend server and clients

▶ Implemented DMTF Redfish-compatible middleware that provides REST API to access and manage data centers and storage devices

▶ Refactored the previous monolithic back-end middleware to implement a microservice-based architecture to maximize deployment velocity and application reliability

▶ Back-end JavaScript development using Node.js + Express + MongoDB