Database Engineer (MongoDB, Postgres)

Database EngineerViridien is seeking a Database Engineer to design, maintain, and optimise database platforms that support global production systems and high-performance computing workloads.This role focuses on managing MongoDB and relational database environments, ensuring they remain secure, scalable, and highly available. You will work closely with software and infrastructure teams to improve database performance, support business-critical applications, and drive continuous improvements across the data platform.About The TeamYou will join a team responsible for managing the database platforms that underpin Viridien's global software and HPC environments.The team works closely with software developers, infrastructure engineers, and operations teams to deliver reliable, scalable, and high-performing database services that support data-intensive applications across the business.Key ResponsibilitiesHighly experienced in data architecture, database design, and software development, with strong hands-on expertise in MongoDB.Strong programming experience in any language (Golang is preferred but not essential), with the ability to develop backend services, database utilities and automation toolsManage, maintain, and support MongoDB and relational database environments.Install, configure, and administer MongoDB sharded clusters and replica sets.Support PostgreSQL environments, including day-to-day administration, backup, and recovery.Monitor database health, performance, and availability using tools such as Prometheus, Grafana, and MongoDB Ops Manager.Analyse and optimise database performance, queries, and configurations.Develop strategies to support data growth, scalability, and high-traffic workloads.Implement backup, restore, Point-in-Time Recovery (PITR), and High Availability (HA) solutions.Troubleshoot database issues and ensure the reliability of production systems.Support business continuity through robust operational practices.Work with development teams to improve database design and application performance.Support testing, validation, and quality assurance activities for database changes.Contribute to automation, operational improvements, and database best practices.RequiredBachelor's degree in Computer Science or a related discipline, or equivalent practical experience.Proven experience administering MongoDB in production environments, including sharded clusters and replica sets.Experience supporting PostgreSQL or other enterprise relational databases.Experience with MongoDB Ops Manager and monitoring tools such as Prometheus and Grafana.Strong knowledge of database backup, recovery, PITR, and High Availability strategies.Experience troubleshooting and optimising database performance.Strong analytical and problem-solving skills.Ability to work effectively in production-critical environments.PreferredExperience supporting globally distributed or high-availability database platforms.Experience with database automation using Bash, Python, or Golang.Familiarity with Linux, Docker, Kubernetes, GitLab, or DevOps practices.Knowledge of data modelling, schema design, and database optimisation techniques.Experience supporting databases for microservices or distributed applications.Familiarity with ANSI SQL and relational database concepts.Experience contributing to quality assurance and testing of database platforms.