Senior QA Engineer: Backend & API Reliability

BNB Chain; Ae; On-site; GBP 60,000 - 90,000; Full time

Job summary

Ceffu is a leading digital asset custody platform that supports institutions with secure, compliant, and scalable solutions. We are seeking an experienced QA Engineer to design and execute robust test strategies for backend services and APIs, while shaping test automation and CI/CD practices at scale.

You will own QA across the software development lifecycle, collaborate with cross-functional teams, and help ensure data consistency, reliability, and high availability in distributed systems.

Qualifications

• Bachelor's degree in CS, software engineering or related field.
• 5+ years of QA or software testing experience.
• Strong API testing experience including RESTful services.
• Hands-on test automation with Java or Python.
• Experience with distributed systems, microservices and databases (MySQL/PostgreSQL).

Responsibilities

• Design, implement, and maintain test strategies, plans and cases for backend services.
• Own QA across SDLC including requirements analysis and production support.
• Perform functional, integration, regression, system, and end-to-end testing.
• Develop and maintain automated testing frameworks for REST APIs.
• Collaborate with cross-functional teams to mitigate quality risks.
• Monitor production systems and troubleshoot defects.

Skills

Backend testing

API testing

Test automation

Distributed systems testing

SQL data validation

CI/CD practices

Debugging

English proficiency

Education

Bachelor's degree in Computer Science or Software Engineering

Tools

Java

Python

JUnit

JMeter

Gatling

Locust

Redis

Kafka

Docker

Kubernetes

Git

CI/CD tooling

Job description

Ceffu is a leading digital asset custody platform that supports institutions with secure, compliant, and scalable solutions. We are seeking an experienced QA Engineer to design and execute robust test strategies for backend services and APIs, while shaping test automation and CI/CD practices at scale.

You will own QA across the software development lifecycle, collaborate with cross-functional teams, and help ensure data consistency, reliability, and high availability in distributed systems.