Andrey Shep

Communication and marketing automation platform. • Implemented SMS provider integrations, routing and suppression rules, delivery callbacks, and inbound and opt-out webhooks. • Developed email validation, SMTP mailbox verification, inbound SMTP processing, and sender reputation tooling. • Maintained a Go CDC service streaming MySQL binlog changes to Elasticsearch, with retries, timeouts, and metr

Developed Go REST services on AWS for IoT device connection management. • Introduced a layered service architecture and improved the testing approach. • Reviewed code and ported existing JavaScript services to Go. • Technologies: Go, REST, AWS, Docker, MongoDB, Prometheus, Datadog.

Subscriber data management and SMS signaling platform for global IoT connectivity. • Built Go services and proxies for Diameter (S6a/S6c) and SS7/MAP over SIGTRAN, translating signaling flows to gRPC. • Implemented subscriber location, authentication, Cancel Location, IDR/IDA, and SMS-related workflows. • Designed persistence layers for DynamoDB-backed services and PostgreSQL/GORM-based smsc-core

Code analysis platform for measuring technical debt and code quality in Git repositories. • Designed and implemented Go and MongoDB services. • Corrected metric calculations used to assess repository technical debt. • Built a Go, Docker, and Nginx deployment tool that allowed QA to switch branches and update staging configuration independently. • Technologies: Go, MongoDB, Docker, NATS, Prometheu

Delivered iOS, React Native, .NET, and Go projects. Resolved critical functionality and backend integration issues in a delayed .NET project and contributed to an internal React Native application.

Redesigned an iOS content management application for App Store release. Coordinated delivery with product and backend teams and designed a white-label architecture used for customer applications.

Developed products and cross-platform libraries for Palm, Symbian, iOS, and Windows Mobile.