Performance Test Engineer: Backend & APIs

iLoq Oy; Oulu; On-site; EUR 55,000 - 75,000; Full time

Job summary

iLOQ Oy in Oulu, Finland, is seeking a Performance Test Engineer to join our R&D team. You will design, develop and run performance tests for backend services and APIs, ensuring scalability and reliability across systems.

You will collaborate with developers and architects, analyze test results, and help drive improvements using Locust and Python. Fluency in English and a technical degree are required.

Qualifications

• Bachelor's or Master's degree in a technical field.
• Experience in software performance testing, load testing or non-functional testing.
• Experience testing backend systems, APIs and distributed services.
• Understanding of performance metrics such as response times, throughput and scalability.
• Experience with Locust for load testing.
• Python programming skills are a plus.
• Experience analyzing logs and monitoring data.
• Familiar with cloud platforms, preferably AWS.
• Strong analytical problem-solving and attention to detail.
• Good communication and teamwork.
• Fluent in English.

Responsibilities

• Design, develop and maintain performance testing solutions for backend services and APIs.
• Plan, create and execute load, stress, endurance and scalability tests.
• Analyze performance test results and identify bottlenecks in apps, databases and infrastructure.
• Collaborate with developers and architects to optimize system performance.
• Monitor system behavior during tests and support root cause analysis.
• Develop and maintain performance testing frameworks and assets.
• Produce performance reports and recommendations for improvements.
• Support performance-related activities throughout the software lifecycle.
• Contribute to continuous improvement of products and quality practices.

Skills

BSc/MSc degree

Performance testing

Backend testing

APIs testing

Perf metrics

Locust

Python

Log analysis

AWS

Analytical skills

English fluency

Communication

Education

BSc/MSc in technical field

Tools

Locust

Job description

iLOQ Oy in Oulu, Finland, is seeking a Performance Test Engineer to join our R&D team. You will design, develop and run performance tests for backend services and APIs, ensuring scalability and reliability across systems.

You will collaborate with developers and architects, analyze test results, and help drive improvements using Locust and Python. Fluency in English and a technical degree are required.