MongoDB Expert with Scala

6 dni temu

Gdańsk, Pomerania, Polska Scalac Pełny etat 50 000 zł - 100 000 zł rocznie
MongoDB Expert with Scala

Remote | EU Time Zone | Contract / B2B

We're looking for a MongoDB Expert with a strong Scala background to join a high-impact project with one of our clients. This is an opportunity to tackle complex technical challenges in a system that's critical for the client's operations, while also shaping the long-term architecture.

 
About the Project

Our client operates around 30 microservices built in Scala, all using MongoDB Scala Driver as their primary database. The system currently relies heavily on transactions across multiple collections, which has led to:

  • ~1 million MongoDB sessions open simultaneously

  • Terminated transactions due to overload

  • Severe performance issues with queues of up to 2–4 hours

The client recognizes this approach isn't sustainable and wants to fix the short-term issues while also redesigning the long-term architecture.

 
Your Role

You will play a key role in both the stabilization and the future redesign of the platform:

Short-term goals:

  • Investigate why so many sessions/transactions are created

  • Fix code and/or adjust MongoDB Driver usage to stabilize operations

Long-term goals:

  • Redesign the shared data model across 30 services to eliminate the need for transactions

  • Provide guidance and hands-on support in implementing a scalable, transaction-free architecture

  • Potentially tune and optimize MongoDB for high-performance workloads

 
What We're Looking For

  • Deep knowledge of MongoDB (transactions, drivers, performance optimization) 

  • Experience with data model redesign and building scalable, high-performance architectures 

  • Proven experience with Scala (production-grade systems, microservices architecture) 

  • Background in large-scale system migrations or refactorings 

  • Ability to work independently and provide technical leadership 

  • Strong problem-solving and debugging skills in distributed systems

Nice to have:

  • Experience with MongoDB cluster tuning and performance optimization

Why Join

  • Work on a technically challenging project that directly impacts system performance

  • Chance to influence and redesign a critical data model used across 30+ services

  • Remote-first engagement with flexibility

  • Rate up to 50 EUR/h 

If you're an experienced MongoDB + Scala expert who enjoys solving deep technical challenges and building scalable solutions, we'd love to hear from you.

Apply now or reach out to learn more

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