Senior Software Engineer (Backend)
Summary
Builds a serverless backend in TypeScript/Python for a construction-focused messaging platform, integrating SaaS tools and real-time APIs.
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 (Auth0, Jira, Sendbird, etc.)
Nice to haves Experience building platforms for
construction, project management, or collaboration tools Understanding of
real-time messaging
and notification systems Knowledge of
task tracking
and project management concepts
What matters more than any of this Can you ship fast Debug independently Learn what you don't know Work well with a small team where everyone wears multiple hats We're looking for someone who can own features end-to-end and isn't afraid to get their hands dirty across the stack.
Comp Competitive salary + meaningful equity. Every early hire has outsized impact and ownership.
Why this is exciting You'll be working on developing a mission-driven, user-focused product, solving real problems in a $1.8T industry that desperately needs better tooling. We're a small, laser-focused team, where your work ships fast and matters immediately. Interested
Email (HIDDEN TEXT) with your background, links to projects/GitHub, and why construction tech excites you.
OnSite is an equal opportunity employer committed to diversity and inclusion.
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 (Auth0, Jira, Sendbird, etc.)
Nice to haves Experience building platforms for
construction, project management, or collaboration tools Understanding of
real-time messaging
and notification systems Knowledge of
task tracking
and project management concepts
What matters more than any of this Can you ship fast Debug independently Learn what you don't know Work well with a small team where everyone wears multiple hats We're looking for someone who can own features end-to-end and isn't afraid to get their hands dirty across the stack.
Comp Competitive salary + meaningful equity. Every early hire has outsized impact and ownership.
Why this is exciting You'll be working on developing a mission-driven, user-focused product, solving real problems in a $1.8T industry that desperately needs better tooling. We're a small, laser-focused team, where your work ships fast and matters immediately. Interested
Email (HIDDEN TEXT) with your background, links to projects/GitHub, and why construction tech excites you.
OnSite is an equal opportunity employer committed to diversity and inclusion.
