Sr. MongoDB DBA / Data Architect – Cosmos DB to MongoDB Atlas Migration - Any UST Location - Immediate Joiner

UST; Bengaluru; On-site; INR 1,800,000 - 3,000,000; Full time

Job summary

UST in Bengaluru is seeking a seasoned database engineer to design and manage large-scale MongoDB deployments. You will administer MongoDB, architect clusters, implement Atlas-based migrations, and ensure robust data modeling, indexing, and high availability.

The role requires collaboration with Java teams, deep understanding of Cosmos DB MongoDB API, and the ability to optimize queries, handle change streams, and manage throttling scenarios.

Qualifications

• 5-9+ years of database/data engineering experience.
• Strong MongoDB administration and architecture skills.
• Experience with MongoDB Atlas and Cosmos DB APIs.
• Migration experience Cosmos DB to MongoDB Atlas or similar.
• Deep knowledge of data modeling, indexing, and aggregation.
• Understanding of sharding, backups, HA, and change streams.
• Familiarity with Cosmos DB RU throttling and 429 scenarios.
• Ability to work with Java development teams.

Skills

MongoDB administration

MongoDB Atlas

Cosmos DB API for MongoDB

Migration tooling

Data modeling

Index design

Aggregation pipelines

Query optimization

Sharding

Change Streams

Cosmos DB throttling

Hashing/Performance

Java interop

Tools

MongoDB Atlas Migration Tools

Cosmos DB Migration Tools

Change Streams tooling

Job description

Mandatory Technical Skills

• 5-9+ years of relevant database/data engineering experience.
• Strong hands‑on expertise in MongoDB administration and architecture.
• Strong experience with MongoDB Atlas.
• Good understanding of Azure Cosmos DB - API for MongoDB.
• Hands‑on experience with database migration, preferably Cosmos DB to MongoDB Atlas or similar MongoDB migrations.
• Strong understanding of:
• MongoDB document/data modeling
• Index design and performance tuning
• Aggregation pipelines
• Query optimization
• Sharding
• Backup and recovery
• High availability
• Change Streams
• Understanding of Cosmos DB RU-based throttling, including 429 Too Many Requests scenarios.
• Ability to identify behavioral and feature differences between Cosmos DB MongoDB API and native MongoDB.
• Experience with migration approaches/tools such as MongoDB Atlas migration capabilities, change streams, or custom migration utilities.
• Strong understanding of cloud networking, including VPC/VNet peering, private connectivity, firewall/network controls, and security.
• Ability to understand application code/database interaction and work effectively with Java development teams.