Senior Software Engineer (Backend)

About OnSiteOnSite 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 RoleWe 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 forYou're experienced in building backend systems and can work across our stack:Proficient in TypeScript and PythonDeep expertise in AWS serverless development (Lambda, API Gateway, RDS, Step Functions, etc.)Strong experience building and optimizing RESTful APIs and event-driven architecturesSolid understanding of MySQL and ElasticsearchComfortable integrating third-party APIs (Auth0, Jira, Sendbird, etc.)

Nice to havesExperience building platforms for construction, project management, or collaboration toolsUnderstanding of real-time messaging and notification systemsKnowledge of task tracking and project management concepts

What matters more than any of thisCan 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.

CompCompetitive salary + meaningful equity. Every early hire has outsized impact and ownership.

Why this is excitingYou'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 [email protected] with your background, links to projects/GitHub, and why construction tech excites you.

OnSite is an equal opportunity employer committed to diversity and inclusion.