Senior Java Architect - MongoDB-Powered Data Platforms

gravity9; England; On-site; GBP 90,000 - 150,000; Full time

Job summary

gravity9 seeks an experienced Java/MongoDB architect to lead architecture, design and delivery across global data platforms. You will design security-aware data architectures, build production Java services, and guide migrations from legacy systems toward a MongoDB-based model with strong auditability.

UK-resident applicants with current SC clearance or eligibility will thrive in this client-facing delivery role, working in a multi-vendor environment and shaping architectural decisions across

Qualifications

• Strong hands-on Java development experience in production systems.
• Solid experience with MongoDB document models, query patterns and sharding considerations.
• Track record delivering data-intensive architectures and migrations at scale.
• Experience designing API boundaries and RESTful services for multi-system integration.
• Demonstrated automated testing discipline and performance testing.

Responsibilities

• Architect and defend data architectures, security models and governance decisions.
• Build production Java services and RESTful APIs integrated with MongoDB Atlas/Enterprise.
• Lead data modernization: model relational/XML into MongoDB; plan cutover with minimal risk.
• Implement access control, encryption and audit within apps and data paths.
• Collaborate with client teams and other vendors; produce design docs and runbooks.

Skills

Java

MongoDB

Data-intensive systems

API design

Testing

Kubernetes

AWS

Security clearance

UK residency

Tools

Terraform

Kubernetes

AWS

Job description

gravity9 seeks an experienced Java/MongoDB architect to lead architecture, design and delivery across global data platforms. You will design security-aware data architectures, build production Java services, and guide migrations from legacy systems toward a MongoDB-based model with strong auditability.

UK-resident applicants with current SC clearance or eligibility will thrive in this client-facing delivery role, working in a multi-vendor environment and shaping architectural decisions across