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Achievement: Pull Shark

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NIDJEL/README.md

Nikita Kruglov

Go Backend Engineer · Distributed Systems · High-Load Systems

Building reliable, concurrent backend systems in Go, with a focus on distributed systems, networking, databases, performance, and infrastructure.

Go C C++ C# PostgreSQL Redis Docker AWS Linux Git GitHub

Open Source Highlight · Go Standard Library

Go Standard Library Contributor

Contributed a concurrency fix to the official database/sql package. The change corrects a lost-wakeup condition in closingMutex writer coordination that could deadlock Rows.Next against a concurrent Rows.Close.

Go Standard Library Merged Upstream database/sql Concurrency

Reviewed and approved by Go maintainers, passed Go TryBots and CI, and merged upstream into the Go master branch.

CL 820060 — database/sql: fix closingMutex writer coordination · golang/go#81043 — lost-wakeup deadlock

Verified AWS

AWS Application Networking Demonstrated

AWS Application Networking Demonstrated

Amazon Web Services Training and Certification Aug 2026

Hands-on AWS assessment covering application networking, service-to-service communication, load balancing, container networking, observability, and cloud infrastructure.

AWS VPC Lattice Amazon ECS CloudFront API Gateway CloudWatch

Verify credential on Credly

Engineering Focus

Concurrent Programming · Distributed Systems · Backend Architecture · Microservices · Networking · Databases · Performance Engineering · Reliability · High-Load Systems

Credentials

  • AWS Application Networking Demonstrated — AWS Microcredential · Verified on Credly
  • IBM Developer Skills Network — Docker Essentials: A Developer Introduction

Current Focus

Distributed Systems · High-Load Go Services · Synchronization & Concurrency Internals · Application Networking · Microservices · Cloud Infrastructure

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