Colliers is a leading diversified professional services and investment management company. With operations in 68 countries, our 22,000 enterprising people work collaboratively to provide expert advice to maximize the potential of property and real assets to accelerate the success of our clients, our investors and our people.

We are at the forefront of the real estate industry, leading the way and backed by an exceptional record of success. We are building for our future – and yours.

We strive to build our business at a competitive pace by augmenting internal growth with smart strategic acquisitions that increase market share, expand service offerings and extend our geographic reach for the benefit of our clients and shareholders.

For more than 29 years, Colliers has created value for shareholders that has resulted in superior returns and industry growth. Our people also own significant equity in our business, which brings pride of ownership to everything we do. We are passionate, take personal responsibility and always do what's right for our clients, people and communities.

We are seeking an experienced and passionate Senior QA Engineer for our newly established Technology Hub in Madrid. This is a unique opportunity to become part of the founding team that helps shape the culture, practices, and technical direction. Working in a hybrid model (remote & onsite), you will enjoy significant freedom to innovate and influence the future of one of the world’s largest commercial real estate companies. With the leadership of the Global Technology Hub coming from a background of technology startups, you will benefit from a fast-paced learning environment, high visibility of your contributions and opportunities to shape processes, culture and technology strategies. At the same time, you take advantage of the stability, resources, and reach of a successful global company.

Guided by our global digital strategy, the Madrid Hub collaborates closely with international teams to deliver world-class technology solutions that power the future of commercial real estate.

As Senior QA Engineer, you will be instrumental in ensuring the delivery of high-quality, reliable and scalable enterprise software solutions. You will contribute to global products and platforms that serve both internal and external customers in Commercial Real Estate across multiple regions. Working closely with international Product, Engineering, DevOps, Data, QA and Architecture teams, you will ensure delivery excellence, software quality and great customer experience.

Your expertise will contribute directly to the quality of modern, component-based frontend application built with React and Typescript, as well as robust backend services developed in .NET.

You are a hands-on problem-solver with strong quality principles, who thrives in a collaborative and agile environment. This role offers the opportunity to influence technical direction and mentor junior members of the team while building solutions with real business impact.

Automation-First Test-Strategy

• Collaborate towards the creation of a reusable automation testing framework
• Develop and maintain comprehensive automated tests suites across frontend, backend, and API layers using tools such as Cypress, Playwright, Postman.
• Lead the implementation of testing frameworks that support both functional and non-functional testing, with a focus on early detection of defects and fast feedback loops.
• Partner with engineers to incorporate testing considerations into development efforts from the earliest stages – ensuring code is testable, scalable and maintainable.
• Embed automated tests directly into CI/CD pipelines, working with DevOps and Engineering Operations to build quality gates and establish fast, reliable release workflows.
• Drive culture of test-first development with unit-, integration- and performance-testing
• Support root cause analysis and resolution of production issues, ensuring high reliability and uptime
• Help define and adhere to coding standards, documentation and software lifecycle best practices.

Tooling and Process Development

• Guide the selection and implementation of modern QA tools across test management, performance testing and frontend testing (Storybook integration).
• Contribute to the standardization of test environments and data management strategies
• Set up processes and practices to reduce test flakiness, support parallel execution, and minimize test execution times.
• Advocate for meaningful test coverage that aligns with product requirements and end-user behavior, using Figma and user stories to guide test case development.

Technical Leadership

• Act as a technical mentor to mid-level and junior engineers within your team or project and beyond.
• Identify opportunities for technical improvements and advocate for high-quality engineering standards
• Participate in design and code review sessions to uphold engineering excellence across the team
• Take on technical ownership of production systems
• Continuous improvement of agile methodologies and tools

Global Collaboration

• Work closely with Product Owners and Product team to refine acceptance criteria, identify edge cases, and ensure business needs are clearly understood and validated.
• Work closely with DevOps and Engineering Operations teams to optimize build pipelines, observability and deployment automation.
• Share insights and best practices across teams, helping to foster a strong quality mindset throughout the engineering department.
• Ensure compliance with global standards, information security policies and regulatory requirements

Required Skills/Experience:

• 5+ years of experience in a QA or software testing role, with a strong background in test automation and modern development workflows.
• Experience testing modern web applications using React, Typescript and .NET technologies.
• Hand-on experience with frontend and end-to-end testing frameworks.
• Familiarity with API testing tools such as Postman or Cypress, with experience writing automated API tests and validating backend behavior
• Experience with integrating tests into CI/CD pipelines using Azure DevOps or similar platforms.
• Agile Development experience (Scrum/Kanban), including story estimation, code reviews and pair programming.
• Experience working in distributed or remote teams and using tools such as Jira, GitHub, Miro and Azure DevOps.
• Familiarity with test case management tools and practices
• Solid understanding of performance optimization.
• Excellent interpersonal and communication skills, fluent in English and Spanish.
• Passionate about building high-quality software products with empowered teams.
• Understanding of secure development practices and compliance frameworks (e.g. ISO27001, GDPR, SOC2).

Preferred Skills/Experience:

• Experience with performance testing and security testing tools
• Experience in working in a global, multi-cultural organization.
• Exposure to domain-driven design (DDD) and event-driven architecture.
• Ability to work in a fast-paced, growing tech environment and to foster change in larger organizations