Junior Software Development Engineer in Test (SDET)

Onum; Madrid; Presencial; EUR 30.000 - 50.000; Jornada completa

Descripción de la vacante

An innovative data optimization company is seeking a Junior Software Development Engineer in Test (SDET) to join their dynamic team. This role offers an exciting opportunity to ensure the quality of a cutting-edge analytics platform while collaborating with talented developers and product managers. As a key contributor, you'll write automated test scripts, execute test cases, and actively participate in the software development lifecycle. Ideal for someone eager to learn and grow, this position provides mentorship and exposure to various testing tools and practices, making it a perfect launchpad for your career in software testing and automation.

Formación

• Foundational understanding of software testing principles and automation.
• Familiarity with testing frameworks or tools like Cypress and Postman.

Responsabilidades

• Write and maintain automated test scripts using existing testing frameworks.
• Execute manual and automated test cases across APIs, UI, and data pipelines.

Conocimientos

Software Testing Principles

Problem-Solving Skills

Attention to Detail

Verbal Communication Skills

Written Communication Skills

Eagerness to Learn

Educación

Foundational Understanding of Software Testing

Herramientas

Cypress

Postman

Git

GitHub Actions

Jenkins

Descripción del empleo

Onum is a data optimization and analytics company based in Madrid. We specialize in real-time data analysis to enable rapid decision-making regarding cybersecurity, network performance, and infrastructure management. Onum helps you optimize your data analytics costs by reducing data, avoiding vendor lock-in, and aligning the value of each dataset with actions taken.

About the Role

As a Junior Software Development Engineer in Test (SDET) at Onum, you’ll play a key role in ensuring the quality of our analytics and optimization platform. You’ll be part of a cross-functional engineering team working closely with developers, product managers, and QA engineers to execute test cases, build test automation, and contribute to the reliability and quality of our product.

This is an ideal role for someone early in their career with a strong desire to learn, grow technically, and make a real impact on the quality of our software systems.

Responsibilities

Testing & Automation Support:

1. Write and maintain basic automated test scripts using existing testing frameworks.
2. Execute manual and automated test cases across APIs, UI, and data pipelines.
3. Assist in identifying, documenting, and tracking defects, working with developers to understand and reproduce issues.
4. Participate in testing activities throughout the software development lifecycle, including regression and exploratory testing.

Learning & Development:

1. Gain exposure to performance, integration, and API testing tools.
2. Learn testing practices in CI / CD environments and collaborate on pipeline improvements.
3. Grow your skills with mentorship from mid- and senior-level QA engineers.
4. Work closely with QA, engineering, and product teams to ensure features are testable and meet quality standards.
5. Communicate testing status, findings, and blockers clearly and effectively during daily stand-ups and team syncs.

Process Contribution:

1. Support continuous improvement efforts by sharing feedback on test plans and proposing incremental automation ideas.
2. Follow established testing processes while identifying opportunities to streamline and improve them over time.

Qualifications

1. A foundational understanding of software testing principles and automation.
2. Familiarity with testing frameworks or tools (e.g., Cypress, Postman, or similar).
3. Basic knowledge of version control tools like Git.
4. Strong problem-solving skills and attention to detail.
5. Eagerness to learn new technologies and grow as an automation engineer.
6. Excellent verbal and written communication skills.

Nice to Have

1. Experience with test automation in CI / CD environments (e.g., GitHub Actions, Jenkins).
2. Exposure to cloud services or distributed systems (AWS, GCP, etc.).