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ThoughtBot

System Architect

Hybrid

Brussels, Belgium

Freelance

19-01-2026

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Skills

Communication Critical Thinking Python SQL Data Warehousing Scrum Architecture Agile Analytical Thinking

Job Specifications

Main Goal: Oversee a large, long-running enterprise Data Warehouse within a major financial institution.

3. Project & Context

Large, long-running enterprise Data Warehouse within a major financial institution.
Millions of queries executed daily.
Not a greenfield project – continuous evolution of an existing platform.
Key goals:
Improve performance and efficiency
Reduce costs where possible
Increase stability and standardization
Improve usability for business users

4. Day-to-Day Responsibilities

Design and review IT architecture for new and ongoing data warehouse initiatives.
Provide architectural proposals for new projects.
Analyze technical topics deeply and independently.
Support multiple parallel initiatives (e.g. performance, reporting, cloud, optimization).
Participate in:
Weekly huddles
Architectural discussions and solution brainstorming
PI retrospectives (every 3 months)
Collaborate with architects across different countries.
Act as a sparring partner for teams by discussing and challenging solution options.

5. Technical Scope & Required Expertise

Core Skills (Must-Have)

Strong SQL (core skill)
Data Warehousing architecture
Structural / relational data models
Data marts
Data transformations
Data quality concepts
IT Architecture experience (senior level)

Technologies & Tools

Teradata
Python
API integrations
Understanding of SAS calculation engine (high-level)
Integration patterns

Domain Knowledge (Strong Plus)

Banking sector experience
Regulatory reporting
Finance & Risk domains

7. Soft Skills & Mindset (Key Differentiators)

Strong conceptual and analytical thinking
Comfortable working in an international, multicultural environment
Open communication style and ability to handle constructive disagreement
Does not take feedback personally
Continuous improvement mindset
Agile / Scrum-oriented thinking
Proactive and constructive attitude
Willingness to:
Share knowledge
Learn from others
Help colleagues
Able to bring positive energy and collaborate effectively over long working hours

8. What Makes a Candidate Stand Out

Proven senior experience in:
IT Architecture
Data Warehousing
Combination of strong technical depth and business understanding.
Experience in large, complex, regulated environments.
Ability to improve existing systems rather than redesign from scratch.
Critical thinking with a pragmatic mindset.

About the Company

We focus on delivering high-performance and premium services to diverse organizations. ThoughtBot is a team of software engineers, programmers, technology experts and technical recruiters who work together to provide our clients with outstanding services. What we do? * IT Consultation * IT Staffing * Web Development * Mobile App Development * IT Consultation In this high-tech and digitalized world, you may be stuck in certain things. You need to analyze your current business practices, approach and standings in technologie... Know more