Senior Full-Stack and Mobile Engineer

Develop open-source Hedera Guardian platform capabilities in a microservices architecture using NestJS, Angular, TypeScript, NATS, MongoDB, Redis, IPFS, and Hedera services.

Implement policy and verifiable-credential workflows for sustainability and traceability use cases, including external topic subscriptions and IPFS-backed document exchange.

Built the Climission AI Toolkit with Python and React, including a Guardian MCP server, Qdrant vector search, and retrieval workflows for domain and policy knowledge.

Built backend services using NestJS and Express and delivered user-facing React and TypeScript features for a healthcare operations platform.

Designed event-driven processing and notification workflows using AWS Lambda, SQS, SES, BullMQ, and Redis, including grouped alerts and rate-controlled delivery.

Improved PostgreSQL and TypeORM workloads involving approximately 14 million events and 2 million tasks through query redesign, CTEs, indexing, and controlled historical backfills. Worked with Databricks integrations and production diagnostics in a serverless AWS environment.

Developed and maintained two cross-platform mobile applications: one using React Native, TypeScript, Redux, and Redux-Saga, and another using Cordova and ExtJS, both supported by PHP APIs.

Delivered production features across mobile user interfaces, application state, API integrations, and backend behavior in a mature field-service product environment.

Diagnosed platform-specific issues and supported reliable Android and iOS releases through Git-based delivery workflows.

Developed a shared Android and iOS codebase using the Harman AIR SDK, Flex, and ActionScript 3.

Used Git, SVN, and Azure DevOps to support software delivery.

Delivered web and mobile backend solutions using PHP, Yii2, Symfony, Laravel, and REST APIs.

Worked for an international outsourcing company serving client product needs.

Built a digital-signage product spanning PHP web applications, C# client software, and Linux cloud infrastructure.

Operated the venture in parallel with other professional work.

Delivered outsourced web products and managed technical operations.

Used Java, ActionScript, PHP, PostgreSQL, MySQL, Windows, and Linux to develop and support solutions.

Built product and subcontracted software solutions using ActionScript 3, Java J2EE, JSP/JSTL, PostgreSQL, and MySQL.

Administered Apache, Tomcat, Linux, Windows, and SSL infrastructure while contributing as a software developer and team lead.