The **Senior Software Engineer** designs and develops business applications and customizes the platforms that support Clean Harbors' field operations, billing, and service workflows. This role balances new development with production support — investigating and resolving data and application issues that impact day-to-day business operations. You'll work as part of a cross-functional team supporting one or more business domains, partnering closely with Product Owners, QA, DBAs, and business stakeholders. Senior Engineers mentor less experienced team members and help raise the technical bar across the team.

**Why work for Clean Harbors?**

+ Health and Safety is our #1 priority and we live it 3-6-5!
+ Competitive wages
+ Comprehensive health benefits coverage after 30 days of full-time employment
+ Group 401K with company matching component
+ Own part of Clean Harbors with our Employee Stock Purchase Plan
+ Generous paid time off, company paid training a...