Emil – Kubernetes, Kotlin, Golang

A stealth-mode, local-first mobile app that uses on-device LLMs for AI capabilities and encrypted communication with a backend. The work centers on privacy-focused product development, shared multiplatform business logic, strongly typed API contracts, and resilient cloud infrastructure for secure mobile experiences.

• Used Kotlin Multiplatform to share business logic across frontend apps;
• Used protobuf and the Buf protocol to define API contracts between frontends, backends, and async messaging;
• Used Go, Kafka, and Spanner to build resilient microservices in Kubernetes, deployed through GitOps with Argo CD.

An AI-powered spreadsheet platform that brings the capabilities of LLMs directly into spreadsheets. It enables users to work with their data more intelligently through AI-assisted workflows, while supporting secure access, billing, file sync, and reliable product delivery.

• Designed and built a custom authentication and authorization system supporting both password and OAuth flows, with hierarchical multi-user permissions, password reset, and email verification;
• Engineered a subscription billing system on top of Stripe, plus a custom usage-based "credits" feature using a declining-balance model;
• Developed a real-time file synchronization service that unified data from Google Drive, Box, and Dropbox into a single database;
• Accelerated release cadence by building a GitOps CI/CD pipeline in GitHub Actions, enabling faster and more reliable deployments.

An online food delivery and restaurant takeout marketplace that connects diners with local restaurants for delivery or pickup. It supports a large marketplace for ordering food online and helping restaurants reach customers through a consumer-facing delivery and takeout platform.

• Architected, developed, deployed, and managed multiple microservices that handled up to thousands of requests per minute;
• Built a big-data analytics pipeline for efficient email marketing using Scala and Spark;
• Developed the backend that powered a loyalty credit program for users using Java, Kafka, and Cassandra.

An online freight marketplace connecting shipping and trucking companies, helping freight businesses find and manage jobs on a single platform. It combined mobile and web workflows for freight operations, real-time location tracking, and geofencing to support end-to-end transportation coordination.

• Developed an iPhone and Android app with authentication, a freight management dashboard, real-time location updates, and geofencing capabilities;
• Developed a web application that allowed shipping companies to create and manage freight transportation jobs;
• Interviewed, hired, and managed a small team of developers to help build features in the apps and web app.