Principal Software Architect - Hybrid, Impact

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.

Job description
Purpose of Position
We are seeking an experienced and passionate Principal Software 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 Principal Software Engineer , you will be instrumental in translating business and functional requirements into robust, scalable, and evolvable system architectures. This role goes beyond today’s requirements: you will actively anticipate future business needs, emerging technological trends, and architectural evolution, ensuring our platforms remain resilient, adaptable, and aligned with long-term strategy.

You will work closely with business stakeholders, product leaders, engineers, and platform teams to uncover implicit requirements, challenge assumptions, and shape solutions that deliver lasting business value. This is a high-impact role with considerable influence over technology direction, architectural standards, and system design across multiple products and regions.

Your expertise will contribute directly to the quality of modern, component-based front-end 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 heavily influence technical direction and bridge the gap between business and teams while building solutions with genuine business impact.

Essential Functions and

Job Duties
Architecture and System Design

Design and evolve end-to-end system architectures based on functional and non-functional requirements, balancing business goals, scalability, security, performance, and cost.
Produce clear architectural artefacts (diagrams, decision records, reference implementations) that guide…