Senior Software Engineer (Backend)

About OnSite

OnSite is the messaging platform replacing WhatsApp for construction teams. We're building tools that turn construction site chaos into easy communication and structured documentation.

About the Role

We are seeking an experienced Back End Engineer to join our team. You’ll work on a modern serverless architecture, integrating with various SaaS platforms to deliver real-time collaboration tools for construction teams.

What we're looking for

You're experienced in building backend systems and can work across our stack:

• Proficient in TypeScript and Python
• Deep expertise in AWS serverless development (Lambda, API Gateway, RDS, Step Functions, etc.)
• Strong experience building and optimizing RESTful APIs and event-driven architectures
• Solid understanding of MySQL and Elasticsearch
• Comfortable integrating third-party APIs ...