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Yaroslav Larionov
QA Engineer
Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
Telegram: @Yaroslav_larionov | LinkedIn: [open contact info](look above in the "contact info" section)

Summary
QA Engineer with 4+ years of experience in Web, Mobile, and API testing across e-commerce and
telecom products. End-to-end and integration testing, REST API/Postman, SQL validation, Kafka
integrations, defect localization across UI, API, and backend layers. Regression and release testing.

Work Experience
VODAFONE Project: Web and mobile services for a telecom operator: customer portal and
QA Engineer application for managing plans, services, balance, payments, and transaction
09/2023 - Present history.
Scale: high-load system with millions of users, payment/billing operations, and
multiple internal services.
My QA Scope
• Tested Web and Mobile functionality, business logic, and key end-to-end user
scenarios.
• Tested REST APIs using Postman and Swagger/OpenAPI: request/response,
status codes, validation, and key negative cases.
• Tested integrations between microservices and external systems, validating
data flow across the chain.
• Worked with Kafka: verified message sending/receiving and event processing
by consumer services.
• Validated PostgreSQL data via DBeaver: payments, plans, subscriptions,
operation statuses, and changes after UI/API actions.
• Analyzed logs and network traffic in Kibana, DevTools, and Charles Proxy to
localize issues between client and backend.
• Participated in release testing: smoke/regression, retest, critical scenarios,
and verification of GitLab CI/CD build results.

Stack: Postman, Swagger/OpenAPI, PostgreSQL, DBeaver, Kafka, Kibana,
DevTools, Charles Proxy, GitLab CI/CD, Docker, Jira, TestRail.
Frontend: React, TypeScript | Backend: Java, Spring Boot.

Achievements
• API regression: built a reusable set of Postman checks for payments,
balance top-ups, plan changes, and service activation, speeding up backend
regression before releases.
• Payment E2E: built end-to-end validation flows using REST API, Kafka, and
PostgreSQL to localize processing and status persistence issues faster.
• Regression: reworked part of the test suite around complete user journeys
and strengthened coverage of billing, payment, and service integrations.
• SQL: prepared reusable queries for payments, plans, subscriptions, and
statuses; the team used them during regression and defect investigation.
• Requirements review: added checks for status transitions, repeated
requests, timeouts, and external service failures; some logic issues were
identified before testing started.
• AI-assisted testing: used ChatGPT to expand negative API checks based on
Swagger/OpenAPI: missing fields, invalid formats, boundary values, size
limits, and conflicting statuses.

Alibaba Project: E-commerce marketplace: web platform and Android/iOS applications.
QA Engineer Catalog, search/filters, product page, cart, checkout and payment, customer
07/2022 - 07/2023 account, and order history.
Scale: international high-load service with millions of users and a large number
of daily orders.
My QA Scope
• Tested Web and Mobile across key user flows from product search to
checkout.
• Validated UI, REST API, data, and integrations between client and backend.
• Participated in smoke/regression and mobile checks before releases.

Stack: Postman, Swagger, DevTools, Charles Proxy, Android Studio, Xcode,
PostgreSQL, DBeaver, Jira, Confluence, TestRail.

Achievements
• Regression: reworked the suite for catalog, cart, checkout, and payment
flows: removed duplicates and outdated checks, updated checklists, and
reduced unnecessary steps.
• SQL validation: added checks for orders, statuses, and user data after UI
and REST API actions, speeding up detection of inconsistencies in
PostgreSQL.
• Mobile regression: expanded coverage with unstable network conditions,
Wi-Fi/mobile data switching, background/foreground behavior, permissions,
and different Android/iOS versions; some issues were found before release.

Hard Skills
Testing API Databases
Manual, Functional, Regression, REST API, Postman, Swagger/ SQL, PostgreSQL, DBeaver
Integration, E2E, Exploratory, OpenAPI, DevTools, Charles
Release Proxy

Messaging Logs & Monitoring Mobile
Kafka Kibana, Grafana Android Studio, Xcode, Android,
iOS

CI/CD & Infra Test Management AI Tools
Git, GitLab CI/CD, Docker, Linux Jira, Confluence, TestRail, Scrum ChatGPT, Claude Code

Education Languages
Odesa National Academy of Food Technologies English - B2 (Upper-Intermediate)
(ONAFT) Ukrainian - Native
Bachelor's degree, 2017 Russian - Native
Portuguese - A1 (Basic)