Senior Database Engineer — Scale & Optimize MySQL

Dyflexis; Den Haag; On-site; EUR 44,000 - 73,000; Full time

Benefits offered by this job

Salary up to €6,500 gross per month

Personal development budget

25 vacation days

In-house chef lunch

Company parties and trips

ARJ Training boxing gym membership

Pension plan

8% holiday allowance

Vacation days trading

Travel allowance

WFH compensation

Friday massages

Job summary

Dyflexis is hiring a Database Engineer to keep our growing data platforms fast, stable, and scalable across multiple clusters in a fintech/HR tech SaaS environment. You’ll work closely with the Platform and development teams to ensure the database layer is considered from the start.

You’ll own performance tuning, migrations, and evolving our infrastructure with scaling strategies like sharding, while writing standards for data management and supporting a broad, international user base.

Qualifications

• 5+ years of experience as a database engineer, ideally across large or complex databases.
• Experience in fintech, HR tech, SaaS, or ticketing and ordering platforms is a plus.
• Deep expertise in MySQL, with solid experience in at least one other Database Management System.
• Familiarity PHP skills, enough to read and review how developers write queries and loops.
• Excellent written and spoken English.

Responsibilities

• Own production database performance: review and optimize queries, indexing, and execution plans using MySQL.
• Run migrations across our database clusters, including working with Atlas.
• Improve and evolve our database infrastructure, including scaling strategies like sharding and partitioning.
• Write and maintain the standards that keep database work consistent across teams, from data modelling to how migrations get done.
• Handle regular database maintenance, from monitoring and mutations to schema changes.
• Review merge requests and PHP code for how they touch the database and join project kick-offs to shape the database approach early.

Skills

5+ years experience

Database performance

English proficiency

Tools

Atlas

PHP

MySQL

PostgreSQL

Oracle

MSSQL

Job description

Dyflexis is hiring a Database Engineer to keep our growing data platforms fast, stable, and scalable across multiple clusters in a fintech/HR tech SaaS environment. You’ll work closely with the Platform and development teams to ensure the database layer is considered from the start.

You’ll own performance tuning, migrations, and evolving our infrastructure with scaling strategies like sharding, while writing standards for data management and supporting a broad, international user base.