System Integration And Test Engineer

principal33 España; Torrejón de Ardoz; A distancia; EUR 40.000 - 55.000; Jornada completa

Descripción de la vacante

A leading IT service company in Spain seeks a System Integration Tester to focus on validating API integrations. Ideal candidates should have extensive experience in automation testing and excellent problem-solving skills. This remote position offers a dynamic work environment and opportunities for professional development.

Servicios

Salary transparency

Annual salary review

Flexible remuneration

Private medical insurance

Day off on your birthday

Gifts for special occasions

Continuous training

Opportunities to attend tech events

Formación

• 3+ years of experience in API or System Integration Testing
• Solid understanding of REST APIs and integration patterns
• Experience with Azure DevOps and CI/CD environments

Responsabilidades

• Develop and maintain integration test plans for API interactions.
• Perform REST API testing and validate request/response payloads.
• Collaborate with team members to understand integration requirements.

Conocimientos

API Testing

System Integration Testing

REST API

HTTP

JSON

Problem-solving

Communication

Automation Scripting

Data Mapping

Herramientas

Postman

Swagger

Azure DevOps

SQL

Descripción del empleo

At Principal33, we strive to make happiness at work a reality. Because it's not just about the money; it's also about the work environment and appreciation. It's about creating the best team setup you can imagine and getting involved in the things you're passionate about. And you can be a part of it because it's fun to get things done!

We want our employees to innovate, and we allow them to do what they are truly passionate about. Based on this conviction, Principal33 aligns its strategy around its vision: to become a leading IT service company and promote a better work-life balance. With currently over 200 employees from different countries, we are actively shaping the future of work.

About the Job

We are seeking a skilled System Integration Tester to join our project team, focusing on validating REST API integrations between an ERP system and external courier services, as well as a Tablet app integrating with the ERP system via SharePoint.

The ideal candidate will ensure seamless data exchange, system interoperability, and reliability by designing, executing, and automating integration tests.

The role will consist of two distinct phases, both within the remit of the successful candidate:

1. Automation System Integration Test Phase
2. UAT Test Coordination Phase

Key Responsibilities

• Develop and maintain integration test plans covering API interactions between ERP and courier systems.
• Collaborate with developers, business analysts, and third-party vendors to understand integration requirements.
• Perform REST API testing, validate request/response payloads, headers, status codes, and error handling.
• Verify authentication mechanisms (OAuth, API keys, JWT).
• Test data synchronization between ERP and courier systems (e.g., order creation, shipment tracking).
• Identify and troubleshoot data mapping issues.
• Integrate tests into Azure DevOps and perform automation scripting (e.g., C++).
• Log, track, and retest defects.

Required Skills & Experience

• 3+ years of experience in API or System Integration Testing
• Solid understanding of REST APIs, HTTP, JSON, and integration patterns
• Experience with manual testing tools (e.g., Postman, Swagger)
• Familiarity with Azure DevOps, including pipelines and boards
• Strong knowledge of ERP systems and data flows
• Good understanding of data mapping, ETL, or middleware logic
• Familiarity with CI/CD environments
• Excellent problem-solving and communication skills

Nice to Have

• Experience with SharePoint integration
• Knowledge of logistics, courier, or supply chain systems
• Familiarity with SQL for data validation
• Background in UAT coordination or user testing environments

What We Offer

Way of working: remote

Remote position within the EU. Please only apply if you hold a valid EU work permit.

Occasional travel to our client's facilities might be required.

• Salary transparency; we discuss ranges in our first contact to align expectations.
• Annual salary review
• Possibility to work as a contractor (B2B)
• Flexible remuneration (only for Spanish or Romanian labor contracts)
• Private medical insurance (only for Spanish or Romanian labor contracts)
• Day off on your birthday
• Gifts for special occasions
• International and multicultural environment

Events

Summer party!

Self-Development

Continuous training to improve your technical skills, evolve in the tech community, and develop professionally. Opportunities to attend local and international tech events are available.

Additional Details

• Senior level: Mid-Senior level
• Employment type: Full-time
• Job function: Information Technology
• Industry: Software Development