Manual QA Engineer | FlintN

We are currently looking for a Manual QA Engineer to join the FlintN — a team, which is building and scaling an all-in-one payment platform for online businesses.

Remote Full-time | QA

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Designing and executing comprehensive test cases for payment flows and backend services.
Performing thorough API testing for internal services and external integrations.
Validating data integrity across databases (Postgres, Clickhouse, OpenSearch).
Testing payment routing logic, cascading scenarios, and retry mechanisms.
Verifying subscription billing flows and recurring payment handling.
Identifying, documenting, and tracking defects with clear reproduction steps.
Participating in requirement clarification and providing testability feedback.
Conducting regression testing for releases and hotfixes.

2+ years of experience in manual testing within the fintech domain.
Solid understanding of software testing fundamentals: test design techniques, test case management, bug lifecycle.
Strong knowledge of API testing - experience with REST APIs, understanding of request/response structures, status codes, and authentication methods.
Proficiency with API testing tools (Postman, or similar).
Good understanding of SQL - can write queries to validate data, check transaction states, and verify payment flows in Postgres.
Familiarity with payment gateway flows: authorization, capture, refunds, chargebacks, 3DS authentication.
Basic understanding of CI/CD pipelines and automated test execution.
Experience with test management tools (Jira, TestRail, or similar).
Knowledge of web application testing basics - browsers, network tools, dev console.
Understanding of PCI-DSS requirements and compliance testing is a plus.

Kate will help!

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What you can expect from working with us:

A chance to work on an early-stage payment product. You’ll have the opportunity to make architectural decisions, work with AI and high-level engineering, enjoy technical freedom, and directly influence the product’s development vector. The startup drive — backed by the stability and support of a holding company.
From idea to action — minimal steps. Any proposal can turn into real changes in the product or processes. If you have an idea, it will be heard.
Your office is wherever it’s convenient for you: home, our Kyiv office, coworking spaces in Lviv or Warsaw, or anywhere else with a stable Wi-Fi connection.
Flexible working hours. Plan your day for maximum efficiency: start between 8:00 and 11:00 and finish between 17:00 and 20:00, considering team collaboration hours.
Continuous growth is a must. Courses, conferences, and an internal library — we invest in your development because the team’s speed and performance directly depend on the expertise of its people.
Health care and wellbeing: medical insurance, a Mental Health program, and compensation for sessions with a psychologist.
Time to recharge: 28 paid days off per year, sick leave, and all public holidays fully covered.
An active corporate life: quarterly team buildings, workshops, and other holding-level events.

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