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Ivan User

@ivanuser19

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Go Backend Developer at Lamoda Tech building traceable logistics workflows and reliable delivery integrations.

Japan

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At Lamoda Tech, I develop Go services for logistics workflows, including carrier handoffs, courier assignments, returns, and delivery-window changes. I added an inbound event log to prevent duplicate webhook-driven status transitions and make payloads and rejection reasons traceable.

At GOSNIIP, JSC, I built a laboratory request lifecycle and versioned equipment and test-method data so historical reports retained the records used at the time of testing. I also published request and report events through Kafka to move notifications and reporting outside the synchronous request path.

At MoySklad, I built event-driven inventory recalculation and moved background work to RabbitMQ workers. Earlier, at CarPrice, I developed vehicle application workflows and resolved production incidents involving callbacks and inspection statuses.

Experience

Work history, roles, and key accomplishments

Current

Go Backend Developer

Current

Lamoda Tech

Apr 2025 - Present (1 year 6 months)

Develops post-assembly delivery workflows including carrier handoff, courier assignment, and delivery-window changes. Implemented an inbound event log to prevent duplicate webhook-driven status transitions and improved traceability of warehouse, courier, and customer events.

Go PostgreSQL Redis Kafka Clickhouse gRPC Protobuf REST APIs Docker Kubernetes Helm GitLab CI CD VictoriaMetrics Grafana OpenTelemetry Linux

Go Backend Developer

GOSNIIP, JSC

Oct 2023 - Mar 2025 (1 year 5 months)

Built a laboratory request lifecycle from draft through closure, reducing spreadsheet tracking. Implemented audit trails and event-driven notifications via Kafka.

Go PostgreSQL Redis Kafka REST APIs gRPC Protobuf Docker Kubernetes GitLab CI CD Grafana OpenTelemetry Linux

Go Backend Developer

MoySklad

May 2022 - Sep 2023 (1 year 4 months)

Built inventory recalculation around domain events and split bulk imports into validation, preparation, and commit stages. Moved background recalculations to RabbitMQ workers and strengthened PostgreSQL locking for reservations.

Go PostgreSQL Redis RabbitMQ Clickhouse REST APIs gRPC Docker Kubernetes GitLab CI CD Grafana Linux

Go Backend Developer

CarPrice

Sep 2020 - Apr 2022 (1 year 7 months)

Developed operator APIs for application filters, validation, permissions, and CRM integration. Built vehicle application workflows and recorded immutable deal-history events.