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04 · SAAS TUNING

Remote Industries — tuning a 10K+ user SaaS

A short, focused engagement: three months, a 45% API boost.

Period
June — August 2024 · 3 months
Role
Backend Developer
Stack
Node.jsPostgreSQLMongoDBRabbitMQDocker

Backend engineer on a production SaaS with ten thousand active users. Focus: API performance, message queues, and preparing the architecture to scale horizontally.

Context

The team needed someone who would quickly locate bottlenecks in the production API and prepare the architecture for growth — without a rewrite.

What I did

  • Built new API features and core functionality for a SaaS serving 10,000+ users.
  • Optimised PostgreSQL and MongoDB queries — latency on key endpoints dropped by 45%.
  • Set up RabbitMQ queues for asynchronous work: email notifications, report generation, exports.
  • Dockerised dev environments with proper networking and volumes for the team.
  • Refactored the schema — reduced redundancy and prepared it for horizontal scaling.