Geos

Senior Fullstack Developer / Founding Engineer (Node.js, React, AI)

In short

Senior Fullstack Developer / Founding Engineer role at Geos LLC to build and scale LeadBridge, an AI-powered SaaS platform for service businesses already live with paying customers. The job requires taking technical ownership, improving AI reliability, integrating LLM APIs/AI agents, and coordinating a small development team. It demands 7+ years of experience with Node.js, TypeScript, React, PostgreSQL, and production SaaS architecture, with compensation being below-market salary plus vesting equity.

About the Role
Geos LLC, a US-based software company, is looking for an experienced engineer to join LeadBridge, an AI-powered SaaS platform for service businesses.
LeadBridge is already in production with paying customers. We're looking for a hands-on senior engineer who can take technical ownership, solve complex problems, improve AI reliability, and coordinate a small development team.
This is an opportunity to help build and scale an existing product, with meaningful ownership in its future.
Key Requirements
•Experience: 7+ years in software development preferred.
•Backend: Strong TypeScript, Node.js, REST APIs, webhooks, asynchronous processing.
•Frontend: React, JavaScript/TypeScript.
•Database: PostgreSQL, SQL.
•Architecture: Production SaaS, complex integrations, scalability, and reliability.
•AI: Experience with LLM APIs, AI agents, and AI-assisted development tools (Claude Code, Codex, Cursor).
•DevOps: CI/CD, automated testing, cloud infrastructure.
•Leadership: Ability to make independent technical decisions, review code, and coordinate other developers.
Nice to Have
•Voice AI, telephony, Twilio, RingCentral, or similar integrations.
•CRM integrations and multi-tenant SaaS.
•Experience in early-stage startups.
Details
•Location: Remote, Europe preferred.
•Engagement: Full-time, long-term.
•Compensation: Below-market salary + equity in LeadBridge (subject to vesting).
•Language: Conversational English.
•Start: ASAP.
We're looking for someone who values long-term ownership and is comfortable combining hands-on engineering with technical leadership.
How to Apply
Send your CV/LinkedIn profile, relevant experience, and a short introduction via DM.

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