Senior Database Developer - MongoDB

Worklane GmbH; Dublin; On-site; EUR 90,000 - 130,000; Full time

Job summary

Worklane GmbH is seeking a Senior Database Developer in Ireland to design, optimize, and scale MongoDB and AWS-based MySQL/Aurora deployments. You will collaborate with development teams and DBAs to ensure high availability, performance, and reliability.

This role offers opportunities to expand cloud and database expertise, contribute to mission-critical systems, and influence platform design decisions in a supportive, cross-functional environment.

Qualifications

• 5+ years of experience with MongoDB (architecture, development, optimization, ops)
• 4+ years of experience with MySQL Development and administration
• Hands-on AWS experience with RDS/Aurora
• Familiarity with Kubernetes (EKS) and containerized deployments
• Experience with GitHub version control and CI/CD workflows
• Strong skills in database performance tuning, troubleshooting, and query optimization
• Understanding of the SDLC and collaboration across teams
• Knowledge of database security, disaster recovery, and data migration practices

Responsibilities

• Design and implement high-performance MongoDB solutions for demanding workloads.
• Manage and optimize AWS RDS (MySQL/Aurora) instances for security, scalability, and cost efficiency.
• Support deployments and orchestration with EKS (Kubernetes).
• Collaborate with developers to design efficient data models, queries, and indexing strategies.
• Manage database schema versioning and scripts with GitHub and Flyway.
• Monitor and tune performance using native tools, AWS CloudWatch, Datadog; address bottlenecks proactively.
• Ensure data integrity, security, compliance, and disaster recovery readiness.
• Support migrations across different RDBMS platforms.

Skills

MongoDB

MySQL/Aurora

AWS

Kubernetes

GitHub

CI/CD

SQL tuning

SDLC

Data security

Tools

EKS

Job description

About the Role

We are seeking for a Senior Database Developer with strong expertise in MongoDB and working knowledge of MySQL/Aurora on AWS. The ideal candidate will have hands‑on experience designing, optimizing, and scaling databases, while collaborating closely with development teams and DBAs to ensure high availability, performance, and reliability.

This is a great opportunity for a mid-level developer who wants to expand their cloud and database expertise while contributing to mission‑critical systems.

Key Responsibilities

• Design and implement high-performance MongoDB solutions for demanding workloads.
• Manage and optimize AWS RDS (MySQL/Aurora) instances, ensuring security, scalability, and cost efficiency.
• Support database deployments and orchestration with EKS (Kubernetes).
• Collaborate with developers to design efficient data models, queries, and indexing strategies.
• Manage database schema versioning and scripts with GitHub and Flyway.
• Monitor and tune performance using native tools, AWS CloudWatch, Datadog, and proactively address bottlenecks.
• Ensure data integrity, security, compliance, and disaster recovery readiness.
• Support migrations and interoperability across different RDBMS platforms.

Required Skills & Experience

• 5+ years of experience with MongoDB (architecture, development , optimization, and operations).
• 4+ years of experience with MySQL Development and administration.
• Hands-on AWS experience with RDS and/or Aurora.
• Familiarity with Kubernetes (EKS) and containerized deployments.
• Experience with GitHub-based version control and CI/CD workflows.
• Strong skills in database performance tuning, troubleshooting, and query optimization.
• Understanding of the software development life cycle (SDLC).
• Strong communication and collaboration skills in cross-functional environments.
• Knowledge of database security, disaster recovery, and data migration practices.

Nice to Have

• Exposure to Infrastructure-as-Code tools (Terraform, CloudFormation).
• Experience with CI/CD pipelines for database changes.
• Exposure to monitoring, automation, and container orchestration tools (Kubernetes, Docker).
• Familiarity with additional AWS services (e.g., Lambda, CloudWatch, IAM).

What You Can Expect

• A people-first culture that emphasizes growth, learning, and engineering excellence.
• Opportunities to influence database and platform design decisions.
• A collaborative and supportive environment with strong cross-team partnerships.
• The chance to make a tangible impact on products that directly affect customers worldwide.

Joining us is more than saying “yes” to making the world a healthier place. It’s discovering a career that’s challenging, supportive and inspiring. Where a culture driven by excellence helps you not only meet your goals, but also create new ones. We focus on creating a diverse and inclusive culture, encouraging individual expression in the workplace and thrive on the innovative ideas this generates. If this sounds like the workplace for you, we commit to respond to every applicant.