Senior Engineer, Migration Service

Description

We’re looking for a senior engineer to build a migration service that moves customers from a legacy payments platform into a core platform. The source system is a legacy PHP application with a SQL database. The target is a set of REST APIs. The work involves understanding the existing data model, mapping it to the new platform, and building a reliable migration service that can be run repeatedly for different partners. Migration sizes range from a handful of records to hundreds of thousands.

What You’ll Be Working On

• Reading data directly from a legacy SQL schema.
• Mapping legacy entities to current API models.
• Building migration workflows that can start, stop, resume, and retry.
• Tracking migration progress and failures.
• Handling large migrations that may run for hours or days.
• Working through cases where source and target systems don’t map cleanly.
• Integrating with payment, merchant, user, subscription, and token-related data.
• Some payment data may require access to encrypted values within the source environment before being sent to the destination platform.

Tech Stack

• TypeScript / Node.js
• SQL
• REST APIs
• Docker
• Kubernetes

What We’re Looking For

• Strong TypeScript and Node.js experience.
• Data migration and ETL experience.
• Seasoned experience with Docker and Kubernetes in production.
• Comfortable working directly with relational databases.
• Experience building backend services and long-running background processes.
• Good systems design instincts around reliability, observability, and recovery.
• Ability to work through incomplete requirements and messy legacy systems without needing everything specified up front.

Bonus Points

• Payments or fintech experience.
• Experience with PHP (to reverse engineer undocumented legacy API interactions).