Founding Senior Software Engineer

RedTech Recruitment Ltd.•New York, NY

4d•$175,000 - $225,000•Hybrid

About The Position

A fantastic opportunity for a Senior Software Engineer to join an early-stage AI software company building intelligent systems that help consumer brands grow. Joining as the second engineer, you will take ownership of backend systems, data infrastructure and AI agents that turn business insights into automated actions. This role would suit a hands-on engineer who enjoys building products from the ground up, shaping technical decisions and supporting other engineers while working directly with the founders.

Requirements

Strong professional experience in full-stack software engineering, with a particular emphasis on backend development
Experience building and deploying production-grade AI agents or LLM-powered systems, with end-to-end ownership
Hands-on experience integrating AI-powered systems with third-party APIs
Strong understanding of data infrastructure, event-driven systems and reliable API integrations
Experience working within a high-growth technology company or well-funded startup
Experience leading or mentoring engineers while remaining actively involved in coding
Ability to prioritize competing tasks and bring structure to an environment with evolving requirements
Strong communication skills and a proactive approach to solving problems
Able to work from the New York office four days per week

Nice To Haves

Founding engineering
Early-stage startups
E-commerce platforms
Marketing technology
Shopify
Meta Ads API
TikTok Ads API
Klaviyo
Python and TypeScript are relevant to the stack, although engineers with strong experience in other languages will also be considered

Responsibilities

Own full-stack development for an AI-powered platform, with a strong focus on backend systems and infrastructure
Build data infrastructure that captures merchant activity and connects business actions with measurable outcomes
Develop AI agents that assess growth operations, identify improvements and execute actions automatically
Build and maintain reliable integrations with e-commerce and marketing platforms
Develop orchestration tools that coordinate data, external services and AI-driven workflows
Help shape the architecture, engineering standards and technical direction as the company grows
Mentor the existing engineer while continuing to write and ship production code
Work directly with the founders to prioritize development and turn business requirements into reliable software