Senior Database Administrator (Open-Source/Fintech Stack)

Senior Database Administrator (Open-Source/FinTech Stack)

About the Company

We are partnering with a highly successful, high-growth financial technology firm and regulated European market operator. Known for their disruptive approach and cutting-edge trading technology, they handle massive volumes of Real Time market data at microsecond speeds.

Instead of traditional, restrictive corporate database structures, they have built a decentralized open-source data architecture engineered purely for extreme performance and scalability.

The Opportunity

We are seeking a Senior Database Administrator to join a talented Infrastructure team and take true ownership of a varied, modern database estate.

This is a hands-on technical role where you can step away from Legacy monolithic systems. You will manage a highly specialized ecosystem built for speed, data version-control, and deep observability. Working closely with Engineering and Operations teams, you will ensure high availability, advise on schema design, and guarantee that core data engines run flawlessly.

The Tech Stack

• Core Relational: MySQL & PostgreSQL
• High-Performance Time-Series: QuestDB (Used for massive market data ingestion & operational metrics)
• Version-Controlled SQL: Dolt (Git-for-data branching technology)
• Caching & Search: Redis & Elasticsearch
• Observability: Grafana & Linux-based monitoring tools

Key Responsibilities

• Estate Ownership: Administer, monitor, and scale the database ecosystem to ensure continuous high availability and reliability.
• Developer Collaboration: Partner closely with engineering teams on schema design, query optimization, and database access patterns.
• Build Observability: Write complex SQL queries to surface vital business and operational metrics onto Grafana dashboards.
• Infrastructure Resilience: Plan and execute seamless upgrades, patch management, and routinely test point-in-time recovery (RPO/RTO) strategies.

What We Are Looking For

• Strong Open-Source DBA Background: Proven experience as a DBA or Database Engineer managing production-scale MySQL environments.
• PostgreSQL Expertise: Solid knowledge of Postgres query planning, indexing, and connection management. (This is highly transferable for their time-series tech, which utilizes the Postgres wire protocol).
• Linux Native: You are entirely comfortable working in Linux-based server environments using command-line tooling.
• Tech Curiosity: A genuine interest in learning and managing specialized, modern data tools (such as time-series engines or branching database systems).
• FinTech or High-Throughput Experience: Background working in a regulated financial services, trading, or high-throughput environment is highly advantageous.

The Culture

The team operates on a culture of trust, collaboration, and continuous improvement. It is a fast-paced but supportive environment where new ideas are actively encouraged, and engineers are empowered to make a direct impact on the core technology products.

Location: London or Paris (Hybrid - 3 days in office)
Employment Type: Full-time, Permanent
Salary: £80/95k + Bonus + Benefits

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