Senior PostgreSQL & AI Data Platform Engineer

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Senior PostgreSQL & AI Data Platform Engineer - 3 months - Belgium

Freelance Position | Partial Remote | Immediate Start

Intro

RELYzIT Talent is seeking a Senior PostgreSQL & AI Data Platform Engineer for our client, a forward-thinking organization at the forefront of responsible AI adoption. Join a multidisciplinary team shaping the future of AI in a secure, ethical, and high-impact environment. This is your opportunity to architect the data backbone that empowers next-generation AI solutions, driving real-world transformation.

Why This Role Matters

Our client is pioneering a strategic vision for AI, ensuring innovation is balanced with security, compliance, and ethical responsibility. As a Senior PostgreSQL & AI Data Platform Engineer, you will be instrumental in building and optimizing the data infrastructure that underpins AI-driven applications, including generative AI, RAG, and machine learning. Your work will directly enable safe, scalable, and high-performing AI solutions that support critical operational and support functions.

What You’ll Be Doing

• Designing, managing, and optimizing PostgreSQL database platforms to support both traditional and AI-powered applications.


• Installing, configuring, and maintaining robust database clusters, ensuring high availability and business continuity.


• Implementing and monitoring high-availability solutions, including replication, clustering, and fail-over strategies.


• Optimizing queries and indexes for peak performance and minimal latency, especially for AI and LLM workloads.


• Configuring and supporting vector databases (pgvector) and integrating them into AI data platforms and RAG architectures.


• Developing and maintaining ETL/ELT pipelines to ensure seamless data flow and integrity across platforms.


• Integrating databases with REST APIs and OpenAPI specifications for scalable, secure data access.


• Collaborating closely with data scientists, architects, and DevOps engineers in a multidisciplinary environment.


• Ensuring compliance with legal, regulatory, and security requirements, embedding governance from the start.


• Championing a culture of continuous improvement, clear communication, and technical excellence.

What We’re Looking For

• Proven expertise in PostgreSQL administration, optimization, and high-availability architectures.


• Hands-on experience with AI data platforms, vector databases (pgvector), and supporting LLM/RAG workloads.


• Advanced skills in ETL/ELT processes, data engineering, and scripting (Python, Bash).


• Strong integration experience with REST APIs and OpenAPI standards.


• Ability to translate complex business challenges into robust, scalable technical solutions.


• Clear communicator, comfortable engaging with both technical and non-technical stakeholders.


• Continuous improvement mindset, open to feedback and new ideas.


• Team player with a collaborative spirit, eager to work alongside diverse profiles.


• Technological curiosity and a passion for applied AI and data-driven innovation.

Technical Skills

• PostgreSQL (Expert)


• pgvector, Vector DB concepts (Expert)


• SQL (Expert)


• ETL, ELT (Expert)


• Replication, Clustering, Fail-over (Expert)


• REST APIs, OpenAPI (Expert)


• Python, Bash (Expert)

Language Proficiency

• Professional proficiency in English required


• Knowledge of French or Dutch is a plus

Other Requirements

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, AI, or equivalent experience


• Open to non-traditional backgrounds (career changers, self-taught, open source contributors) with demonstrable impact


• First-hand experience developing applications integrating AI


• Strong attention to detail, code quality, and awareness of AI performance (latency, scalability)


• Ability to work on-site in Belgium at least 2 days per week; remote work authorized within Belgium


• Multidisciplinary team environment with internal and external collaborators


• Start date: ASAP | Duration: 3 months (with possible extension)