Founding AI Engineer for Agentic Systems

Fairmarkit; Boston (MA); On-site; USD 336,000 - 375,000; Full time

Benefits offered by this job

Equity

Benefits

Job summary

Fairmarkit, the leading autonomous sourcing platform, is building a new AI-driven, agentic business line from the ground up. This is a founding-engineer role; you’ll work directly with co-founders to shape both the system and the user experience.

You’ll thrive on building, shipping, and iterating daily, aligning product decisions with real customer input and rapid experimentation. You will shape the architecture, drive pragmatic technical decisions, and own the end-to-end stack as the team

Qualifications

• Hands on experience building and deploying LLM powered applications or agentic systems in production.
• Strong full stack engineering fundamentals across modern JS/TS frameworks, Python, REST/GraphQL APIs, and cloud platforms such as AWS, GCP, or Azure.
• Experience with AI orchestration frameworks such as LangChain, LlamaIndex, AutoGen, CrewAI, or equivalent.
• Strong product and design sensibility, with the ability to make good UX calls without a dedicated designer in the room.
• The ability to move fast without sacrificing foundational quality: you know when to cut corners and when not to.
• A founder mentality: you think about product, users, and business outcomes, not just tickets.
• Comfort with ambiguity and zero to one environments where you're building the playbook, not following one.

Responsibilities

• Architect and build AI agentic systems from the ground up that reshape how commerce operates.
• Own end to end full stack development from front to back, infrastructure to interface, with AI first thinking throughout.
• Design and build intuitive, AI native user experiences, not just backend logic.
• Prototype quickly and iterate in direct collaboration with co‑founders and early customers.
• Partner with forward leaning industry leaders who are moving fast and expect the same.
• Help define the technical foundation, stack decisions, and engineering culture for a scaling team.
• Operate daily in the trenches with leadership, with high visibility, high ownership, and high impact.

Skills

LLM powered apps

Full stack fundamentals

Founder's mindset

Product & design sensibility

Speed with quality

Ambiguity tolerance

Zero to one thinking

Tools

LangChain

LlamaIndex

AutoGen

CrewAI

AWS

GCP

Azure

Job description

Fairmarkit, the leading autonomous sourcing platform, is building a new AI-driven, agentic business line from the ground up. This is a founding-engineer role; you’ll work directly with co-founders to shape both the system and the user experience.

You’ll thrive on building, shipping, and iterating daily, aligning product decisions with real customer input and rapid experimentation. You will shape the architecture, drive pragmatic technical decisions, and own the end-to-end stack as the team