Looking for a job

Sergei Vavilov

@sergeivavilov

Message

Full-Stack QA Engineer at B2BROKER, where I automated about 300 API regression scenarios for crypto payment products.

Kazakhstan

Message

What I'm looking for

I’m interested in gaining hands-on commercial experience in smart contract testing.

At B2BROKER, I test B2BINPAY and B2CORE, covering crypto payment processing, brokerage, payments, and digital-asset workflows. I validate wallet, deposit, withdrawal, currency exchange, and transaction scenarios across Ethereum, Tron, and Solana testnets.

I developed and maintain approximately 300 API automated tests using Java, Rest Assured, JUnit 5, Maven, and Allure Report. This automation reduced manual regression time by approximately 1.5 working days, and I also work on stabilising flaky tests.

At INNOTECH, I tested an enterprise banking collateral-management platform and automated critical business scenarios across all 12 microservices. I analysed Swagger/OpenAPI contracts, tested service interactions, and validated PostgreSQL data with SQL.

At ITQ GROUP, I joined a banking-platform project as its only QA engineer and established the testing process from scratch. I’m interested in gaining hands-on commercial experience in smart contract testing, alongside my self-directed study of Web3, blockchain systems, and cryptocurrency infrastructure.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack QA Engineer

Current

B2BROKER

Mar 2024 - Present (2 years 7 months)

Tested backend functionality and internal APIs for crypto payment processing and brokerage products. Automated approximately 300 API regression scenarios, reducing manual regression time by about 1.5 working days.

Java Rest Assured JUnit5 Maven Allure Reports PostgreSQL SQL REST WebSockets Postman Swagger OpenAPI JSON Datadog GitLab CI CD Jenkins Jira Confluence Kafka Charles Proxy Selenium TestNG Kubernetes Linux

QA Automation Engineer

INNOTECH

Feb 2021 - Mar 2024 (3 years 1 month)

Tested a backend platform for collateral management in enterprise banking. Automated critical business scenarios across all 12 microservices, accelerating regression testing and improving integration confidence.

Java Rest Assured JUnit5 Maven PostgreSQL SQL REST Postman Swagger OpenAPI Microservices

Manual QA Engineer

ITQ GROUP

Mar 2020 - Feb 2021 (11 months)

Established the QA process from scratch for a banking platform, creating test plans, cases, and regression suites. Initiated UI automation using Java, Selenide, TestNG, and Maven.

Java Selenide TestNG Maven SQL Jira Functional Testing Regression Testing Smoke Testing Exploratory testing Web Testing UI Testing

Manual QA Engineer

BIFIT

Mar 2018 - Mar 2020 (2 years)

Performed functional, regression, smoke, usability, and cross-browser testing. Tested REST APIs using Postman and validated Oracle/PostgreSQL data using SQL.