Database Engineer (MongoDB)

C Mack Solutions LLC•Ashburn, VA

13h•$90,000 - $125,000•Onsite

About The Position

C. Mack Solutions is looking for a Database Engineer with agile methodology experience to join their team and support a complex program to provide Agile development and operations and maintenance for critical systems on a mission-critical program for the Federal Government business needs. As the Database Engineer, you will be the core data authority on an Agile Scrum team. You will spend your time designing, modeling, securing, and maintaining both modern document-based NoSQL database environments (primarily MongoDB) and relational database management systems (RDBMS like PostgreSQL). The ideal candidate is a blend of a highly skilled database administrator and a forward-thinking data architect who understands when to leverage NoSQL and when to utilize relational models to optimize mission-critical application performance.

Requirements

Must live within the DC, MD, VA area.
U.S. Citizenship is required.
Candidate must be able to obtain a CBP Public Trust clearance.
College degree (B.S.) in Computer Science, Software Engineering, Information Technology, or a related technical field.
5–7+ years of database administration/engineering experience, with a minimum of 3+ years of dedicated, hands-on experience designing and administering MongoDB environments.
In-depth knowledge of MongoDB architecture, replica sets, sharded clusters, locking mechanisms, storage engines (WiredTiger), and transaction handling.
Designing scalable schemas for document-oriented databases (handling polymorphic schemas, bucket patterns, schema versioning) and relational databases.
Working knowledge of relational database administration, schema design, and SQL development (PostgreSQL, Oracle, or Microsoft SQL Server preferred).
Tuning slow queries, creating compound and partial indexes, and debugging performance bottlenecks in both SQL databases and NoSQL systems.
Writing clean, maintainable automation scripts in Python, Bash, or PowerShell.
Configuring database security (TLS/SSL certificates, Kerberos/LDAP integration, auditing logs) and applying database STIGs/hardening guidelines.
Comfortably navigating Linux operating systems (RHEL/CentOS) for database host configuration, volume management, and performance monitoring.

Responsibilities

Design and document logical and physical data models.
Guide software development teams on database schema design, indexing strategies, and data relationships for both NoSQL (document design patterns, referencing vs. embedding) and relational (normalization, foreign keys, indexing) systems.
Administer, configure, upgrade, and maintain MongoDB environments.
Design and manage high-availability infrastructure, including MongoDB replica sets, sharded clusters, and distributed systems.
Administer, model, and maintain relational databases (such as PostgreSQL or Oracle) that interface with modern legacy and modernized systems.
Perform continuous database tuning and query optimization.
Analyze execution plans, evaluate indexes, and optimize MongoDB aggregation pipelines and SQL queries to eliminate bottlenecks.
Implement and maintain database security controls, including authentication, role-based access control (RBAC), auditing, encryption-at-rest, and encryption-in-transit, ensuring alignment with CBP and DHS security regulations.
Develop, test, and implement robust backup, recovery, and disaster recovery strategies for distributed NoSQL and relational databases.
Automate database deployment, configuration management, patching, and routine maintenance tasks using scripting languages (Python, Bash) and Infrastructure-as-Code (IaC) tools.
Actively participate in Agile scrum ceremonies, collaborating closely with developers, cloud engineers, and government stakeholders to support rapid, short-sprint software releases.