Senior Fullstack QA Engineer (Java/Kotlin)

id 129883

QA Fullstack
Java/Kotlin
Senior
"Customer location: United Kingdom
Candidates locations: All except Belarus, Russia
Language: English B1+, Russian
Estimated start date: 02.11.2026
Duration: 3 months"

Project Responsibilities

Owning the test strategy for a data-collection platform spanning the worker app (WebView inside the main inDrive app), the back office, and backend services, from test plans through release sign-off.
Testing media capture and upload in real-world conditions: photo, voice, video, and text across a wide range of Android/iOS devices, poor networks, interrupted and resumed uploads, and on-device pre-checks.
Verifying complex business flows and state machines: task reservation and expiry, quotas and campaign auto-stop, submission statuses, review and rework cycles, labeling consensus, and buyer isolation between segments.
Ensuring correctness of money and compliance flows: accruals, balances, payout batches and reconciliation, consent versioning and withdrawal, data erasure, and audit trails for every action.
Building and maintaining end-to-end and API test automation in CI, plus load testing of the task queue and ingestion under peak traffic (e.g. after mass push notifications).

Candidate's Portrait

A QA Fullstack engineer with a strong background in both manual and automated testing, ready to build automation essentially from scratch
Proficient in Java/Kotlin, with a level sufficient to write and maintain automated tests
Understands the product’s business risks and can prioritize testing with a focus on money, compliance, and critical user flows
Comfortable working across the mobile app (via WebView), web, API, and backend services, able to see the full picture
Self-sufficient, capable of building out test strategy and process for a new product without existing infrastructure in place
Russian Speaker

Must-haves

Experience in functional, integration, API, and E2E testing across the full user journey: onboarding and consent, task queue, data capture and upload, review, earnings, and payouts
Automation experience in Java/Kotlin this is a new product with no existing automated tests, and the goal is maximum automation coverage
Selenium/Selenide + Appium
Strong experience in API automation (REST and/or gRPC), including tools such as Postman
Understanding of microservices and event-driven architecture: retries, timeouts, idempotency, duplicate events, eventual consistency
Experience testing financial flows: accruals, balances, batch payouts, reconciliation with third-party payout providers
Understanding of data privacy requirements: consent management, data retention, erasure
Experience testing time- and quota-based logic: TTL-based task reservations, expiry and reassignment, volume limits, targeting by country/language/segment
Ability to investigate issues using logs, metrics, traces, databases, and message queues (Grafana, CloudWatch, Kibana, Kafka, SQL/MySQL)
Experience working with CI/CD, Docker, AWS-based environments
Ability to validate consistency across the mobile app, WebView, back office, backend APIs, and distributed services, and troubleshoot partial failures and partner/service outages
Experience contributing to test strategy, requirements reviews, release validation, and production issue analysis with a focus on business risk

Nice-to-have

Experience testing media capture and upload on mobile devices (photo, voice, video, text): device fragmentation, permissions, unstable networks, resumable uploads, on-device validation
Knowledge of JS/TS for automation
Knowledge of Playwright/Cypress
Experience testing integrations with external services: authentication, CRM, push notifications, payout partners, LLM providers, cloud storage (S3)
Experience with load and performance testing (task queues, ingestion under peak load, e.g. after mass push notifications)
Experience with Appium or other mobile automation frameworks a plus, but not required, as the current priority is API and web automation