Fountain builds workforce management software for the world's largest hourly employers.
We are an agent-first engineering organization where coding and review agents are integrated into our daily workflow.
Our platform team builds the critical systems that enable engineers and agents to ship dependable products at scale.
What You'll be Doing:
Develop foundational systems
Ship platform capabilities
Own performance, security, and stability
Enhance agentic systems
Lead architectural decisions
Design reliable code, APIs, and contracts
Collaborate across teams
Work autonomously
Identify problems and ship fixes
What you bring:
5+ years backend-focused engineering
Expert systems design
Strong API/UX/code judgment
Experience with agentic or LLM-based systems
Initiative
Thrives in autonomy
Excellent written communication
Nice to have:
Designed APIs/tools for agents
Startup experience
Event-driven architectures/monorepos/observability
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📌 Senior Software Engineer - Fountain One (Buenos Aires)
🏢 B Capital
📍 Buenos Aires