Senior Backend Software Engineer

Opiniion Inc. is a resident satisfaction software company that partners with property management firms to enhance living experiences. They are looking for a Senior Backend Software Engineer to lead the migration from MongoDB to PostgreSQL, design database schemas, and ensure the development of secure and efficient APIs.

Responsibilities:

• Write and maintain Node.js API services
• Architect the relational schema from our existing document-based data model
• Design and execute a zero-downtime migration strategy (dual-write, expand-contract, etc.)
• Own DB performance — indexing, query analysis, connection pooling
• Work with Node.js to read, process, and optimize MongoDB and SQL
• Work inside Docker locally and on AWS

Requirements:

• Have shipped a production NoSQL → relational migration, and can walk us through it
• Have a strong background in backend software engineering, and understand relevant computer science fundamentals
• Know PostgreSQL deeply (JSONB, CTEs, window functions, transactions, EXPLAIN ANALYZE)
• Are competent and autonomous at writing Node.js code
• Have used schema migration tooling
• Are comfortable in AWS (RDS, ECS, IAM, VPC basics)
• Think about data integrity first, speed second
• Are willing to use AI in your daily development work