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Dan Shtal

@danshtal

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Senior Backend Engineer at VK who migrated a social platform to Go microservices, scaling traffic share from 2% to 80%.

Georgia

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What I'm looking for

I'm open to remote roles.

At VK, I migrated a social platform from a Perl monolith to Go microservices, growing Go’s traffic share from 2% to 80% and raising maximum supported throughput from about 1,000 to 85,000 RPS.

I also migrated 40 services to VK’s internal cloud and built Go libraries and tooling that reduced deploy-time API errors to zero. My work included improving release processes and introducing integration and load testing in CI.

At EFKO Digital Solutions, I drove a low-code cloud platform from raw MVP to production in eight months. I decomposed a Go monolith into 12 microservices and helped grow the team from three to seven engineers.

At Black Wall Group, I built a real-time transaction analytics pipeline with Kafka, ClickHouse and Go worker pools. Earlier, as a Software Engineering Intern at School No. 444, I contributed to internal systems and built web tooling used by students.

Experience

Work history, roles, and key accomplishments

Senior Backend Engineer (Go)

Aug 2024 - Sep 2026 (2 years 1 month)

Migrated a large social platform from a Perl monolith to Go microservices, growing Go's traffic share from 2% to 80% and raising max supported RPS from ~1K to ~85K. Automated code review and rollout, raising release frequency from 1-2 per week to daily.

Go Microservices gRPC Kafka Clickhouse CI CD Performance Optimization System Design Distributed Systems

Lead Software Engineer

EFKO Digital Solutions

Feb 2022 - Jul 2024 (2 years 5 months)

Drove a low-code cloud platform from MVP to production in 8 months, now used by ~1,500 internal employees. Decomposed a Go monolith into 12 microservices and defined an internal Go SDK over Protobuf, accelerating new-service development by ~30%.

Go Microservices Protobuf Temporal PostgreSQL MongoDB Team Leadership System Design

Backend Software Engineer (Go)

Black Wall Group

Nov 2020 - Feb 2022 (1 year 3 months)

Built a real-time transaction analytics pipeline on Kafka, ClickHouse and Go worker pools, delivering business metrics over ~1,000 events per second at peak. Integrated ~10 external providers behind a unified Go gateway, cutting new-integration time from ~2 weeks to ~3 days.

Go Kafka Clickhouse gRPC Prometheus Clean Architecture CI CD Observability

Software Engineering Intern

School No. 444

Jan 2018 - Nov 2020 (2 years 10 months)

Contributed to internal school systems and built web tooling used by ~2,000 students. Built a documentation system for teachers and administration, cutting routine operations by ~90%.

Web Development Documentation Systems