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Vadim Nikolaev

@vadimnikolaev

Go Developer at VK who cut application P95 latency by 50% and built a Wildberries service handling 20,000 RPS.

At VK, I work on a high-load HR document management SaaS, where I cut application P95 latency by 50% and improved document retrieval P95 by 4.7×. I also designed Kafka and Transactional Outbox workflows and introduced compatibility checks in CI.

At WILDBERRIES, I built a Go dynamic-menu service from scratch that handled up to 20,000 RPS with uninterrupted content updates. Earlier, I built production Go microservices at ELMA and backend services for recruitment and HR workflows at POSPEKH.

Experience

Work history, roles, and key accomplishments

Current

Go Developer

Current

Dec 2024 - Present (1 year 10 months)

End-to-end feature ownership and architecture for a high-load HR document management SaaS with 800,000+ users. Led 20+ initiatives, cut P95 latency by 50%, and improved document retrieval P95 by 4.7x.

Go Kafka PostgreSQL Redis Protobuf OpenAPI Kubernetes Docker CI CD Tracing Profiling SQL Caching Distributed Systems Transactional Outboxes Sharding

Go Developer

Wildberries

Apr 2024 - Dec 2024 (8 months)

Built a Go dynamic-menu service from scratch handling up to 20,000 RPS with uninterrupted content updates. Designed sharded in-memory storage and integrated event-driven updates via Kafka/NATS.

Go Kafka NATS Kubernetes Docker Monitoring incident investigation Distributed Systems Sharding In Memory Computing Concurrency

Go Developer

ELMA

Jul 2022 - Apr 2024 (1 year 9 months)

Built 3 production Go microservices for document management workflows and rebuilt the templating engine with ANTLR and Aspose handlers, improving generation speed 3-4x and reducing defects 3x. Mentored 2 junior developers.

Go REST gRPC Kubernetes CI CD Antlr Aspose Microservices Concurrency Worker Pools Mentorship

Go Developer

Pospekh

Sep 2020 - Jul 2022 (1 year 10 months)

Built backend services for automated recruitment, candidate testing, identity verification, and HR workflows. Designed REST APIs and MySQL schemas, integrated MinIO document storage, and introduced TDD and integration testing.

Go REST MySQL Minio Test Driven Development Integration Testing Backend Development