Senior QA Automation Engineer (C#)

KUBO; Poland; On-site; PLN 150,000 - 190,000; Full time

Benefits offered by this job

Private medical care

Sport card

Life insurance

Job summary

KUBO is seeking a Senior QA Automation Engineer to join our client’s team, delivering digital solutions for maritime, energy and industrial sectors. You will automate tests across microservices, APIs, and asynchronous workflows, leverage Docker/Kubernetes, and work with SQL/NoSQL databases in an agile setting.

Expect 2–4 short trips annually to Poland/Norway; start ASAP. Strong C#/.NET automation background, experience with event-driven architectures, and collaboration with cross-functional

Qualifications

• Requires strong experience in test automation using C#/.NET.
• Experience testing microservices, APIs and asynchronous workflows.
• Hands-on with test frameworks and integration/end-to-end testing.

Responsibilities

• Developing and maintaining automated tests using C#/.NET.
• Building and maintaining test frameworks.
• Testing microservices, distributed systems and asynchronous workflows.
• Designing and executing integration and end-to-end tests.
• Testing event-driven communication and event flows.
• Testing APIs and asynchronous communication such as webhooks and WebSockets.
• Working with SQL and NoSQL databases.
• Root cause analysis of production issues.
• Collaboration with Developers, DevOps and Product Owners.
• Using AI tools to support testing and analysis.

Skills

Test automation

C#/.NET

API testing

Microservices

SQL/NoSQL

CI/CD

Agile/Scrum/Kanban

English proficiency

Tools

Docker

Kubernetes

Kafka/RabbitMQ

Job description

We are looking for a Senior QA Automation Engineer to join the team of our client - an international company providing digital solutions and data services for the maritime, energy and industrial sectors.

You will work on a complex platform built around microservices, event-driven communication, system integrations and large-scale data processing. The role focuses on test automation across microservices, integrations, APIs and asynchronous workflows.

Key responsibilities

• Developing and maintaining automated tests using C#/.NET
• Building and maintaining test frameworks
• Testing microservices, distributed systems and asynchronous workflows
• Designing and executing integration and end-to-end tests
• Testing event-driven communication and event flows
• Testing APIs and asynchronous communication such as webhooks and WebSockets
• Working with SQL and NoSQL databases
• Investigating production issues and performing root cause analysis
• Supporting quality across the development lifecycle
• Collaborating with Developers, DevOps, Product Owners and other cross-functional team members
• Using AI tools to support testing, automation, analysis and everyday engineering work
• Strong commercial experience in software testing and QA
• Solid experience in test automation, preferably with C#/.NET
• Experience in building and maintaining test frameworks
• Practical experience with microservices and distributed systems
• Experience with event-driven architecture and technologies such as Kafka or RabbitMQ
• Experience testing asynchronous communication and workflows
• Strong experience with integration and end-to-end testing
• Experience with systems processing large volumes of data
• Practical knowledge of Docker and Kubernetes
• Good knowledge of SQL and experience with NoSQL databases
• Experience with root cause analysis and production issue investigation
• Experience working in Agile environments such as Scrum or Kanban
• Good command of English

Nice to have

• Playwright or Selenium
• MongoDB or NocoDB
• Grafana, Prometheus or Loki
• mTLS, IAM or SSO
• Performance testing tools, e.g. k6
• OWASP ZAP or Veracode
• React.js
• Experience with cloud environments
• Practical experience using AI tools in software development or QA

Conditions

• B2B contract (long-term)
• Start: ASAP
• 2-4 business trips per year to client's office in Poland/Norway
• Benefits: private medical care, sport card, life insurance
• Budget: depending on the candidate's experience and skills
• Phone call with Recruiter
• Interview with the client (may require 2 rounds)