Architect I - Cloud Infrastructure Services ( Mongo DB Cosmos DB)

UST; Thiruvananthapuram; On-site; INR 1,800,000 - 2,400,000; Full time

Job summary

UST is seeking a highly skilled Senior MongoDB DBA / Data Architect to lead a strategic migration from Azure Cosmos DB (API for MongoDB) to MongoDB Atlas. The role requires deep experience in database architecture, problem-solving, and ownership of migration deliverables with minimal business disruption.

Ideal candidates will have 5–9+ years of experience, familiarity with Atlas Live Migration Service, change streams, and experience designing sharded clusters, replica sets, VPC peering, and

Qualifications

• 5–9+ years of experience in database administration or data architecture.
• Experience migrating from Cosmos DB to MongoDB Atlas with minimal downtime.
• Strong understanding of RU rate-limiting, aggregation behavior, and indexing differences.

Responsibilities

• Lead migration from Cosmos DB to MongoDB Atlas.
• Assess existing app and database environments.
• Provide technical leadership across migration lifecycle.
• Minimize business disruption during cutover.

Skills

Cosmos DB limits

Migration strategies

Atlas infrastructure

Live Migration Service

Change streams

Sharded clusters

Replica sets

VPC peering

Index tuning

Tools

Azure Cosmos DB

MongoDB Atlas

MongoDB

Job description

Role Description

We are seeking a highly skilled Senior MongoDB DBA / Data Architect to support a strategic database modernization initiative involving the migration from Azure Cosmos DB (API for MongoDB) to MongoDB Atlas. The ideal candidate should possess strong database architecture expertise, excellent problem-solving skills, and the ability to assess existing application and database environments while driving migration activities with minimal business disruption. This role requires a proactive individual who can quickly learn new technologies, take ownership of deliverables, and provide technical leadership throughout the migration lifecycle. successful migration from Azure Cosmos DB (API for MongoDB) to MongoDB Atlas, you will need a Senior-level DBA or Data Architect with 5 to 9+ years of experience Migrating out of Cosmos DB's emulation layer requires deep expertise because of fundamental behavioral differences. While both use MongoDB syntax, Cosmos DB enforces strict request unit (RU) rate-limiting, has a different aggregation engine pipeline behavior, and handles indexing differently compared to native MongoDB Atlas. A junior or mid-level DBA might struggle with data type mismatches, indexing re-architecting, and avoiding downtime during the cutover.

Essential Technical Skills to Interview For When vetting a DBA for this specific migration task, ensure they have proven experience with:

1. Cosmos DB constraints: Awareness of Cosmos DB's specific limitations, such as maximum document sizes, different aggregation operators, and strict error handling (like 429 Too Many Requests).
2. Migration Strategies: Experience utilizing the MongoDB Atlas Live Migration Service or custom change streams to fetch data seamlessly.
3. Atlas Infrastructure: Deep familiarity with building sharded clusters, replica sets, setting up VPC peering, and tuning MongoDB indexes on the cloud native platform.