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nelakov/README.md

Hey, I'm Nikita

Go Backend Engineer

6 years in fintech · ex-Quality Assurance Team Lead

🟢 Open to Go backend roles. Remote  ·  📍 Barcelona, Spain (GMT+1)  ·  contractor / B2B

I set up QA from scratch on a fintech platform, then moved over to writing the backend. Six years across investments, origination/KYC, payments, and order management. Working both sides taught me where these systems break and how to keep them from breaking.

Lately I'm focused on blockchain infrastructure. Regulated crypto (exchanges, custody, on-ramps, payment rails) runs on the same domains I already know: onboarding and KYC, transfers, and portfolio order flow.

CV

Tech Stack

Backend: Go, gRPC, REST, Kafka, Camunda

Data: PostgreSQL, MongoDB

Infrastructure: Docker, Kubernetes

Also: Java, Kotlin, Spring

Projects

Backend & Systems

rangiffler - microservices travel social network. Spring Boot, gRPC, Kafka, OAuth2, MySQL, a React frontend, plus a full E2E suite.

thank-go-practice - my solutions for the Stepik "Thank Go!" course: fundamentals, concurrency, the standard library.

tcp-chat-java - multi-client TCP chat in plain Java. Sockets, a small wire protocol, in-memory history.

Test Automation & QA

alfabank-journey-of-the-day-autotests - UI, API and DB tests for a fintech payment app, running against both MySQL and PostgreSQL. Selenide, REST-Assured, JUnit 5, Allure, Docker Compose.

vivid-ui-tests - end-to-end UI tests for the Vivid Money web app. Page Object Model, parallel runs, local or Selenoid grid, Allure with video and logs, Jenkins, Telegram.

wikipedia-android-ui-tests - mobile UI tests for the Wikipedia Android app. The same code runs on BrowserStack, an emulator, or a real device. Appium, Selenide, JUnit, Allure, Jenkins.

spring-api-testing-demo - Spring Boot books/authors REST service with a black-box REST-Assured suite. OpenAPI 3.1, Swagger, Allure.

rest-api-test-framework - REST API tests with contract-first JSON Schema validation and data-driven cases. REST-Assured, Allure, Swagger, Jenkins, Telegram.

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  1. thank-go-practice thank-go-practice Public

    Practice solutions for the Stepik 'Thank Go!' course. Fundamentals, concurrency, standard library.

    Go

  2. rangiffler rangiffler Public

    Microservices travel social network with a full E2E suite. Spring Boot, gRPC, Kafka, OAuth2, MySQL, React.

    Java 2 1

  3. tcp-chat-java tcp-chat-java Public

    Multi-client TCP chat in plain Java. Sockets, a small wire protocol, in-memory history, no frameworks.

    Java 1 2

  4. spring-api-testing-demo spring-api-testing-demo Public

    Spring Boot books/authors REST API with a black-box test suite. REST-Assured, OpenAPI 3.1, Allure.

    Java 1

  5. alfabank-journey-of-the-day-autotests alfabank-journey-of-the-day-autotests Public

    UI, API and DB autotests for the Alfa-Bank 'Journey of the Day' payment app; runs against MySQL and PostgreSQL. Selenide, REST-Assured, JUnit 5, Allure.

    Java 1 1