AI-Native Full-Stack Software Developer

Fairmarkit; Województwo mazowieckie; Sur place; PLN 300 000 - 600 000; Plein temps

Résumé du poste

Fairmarkit, the AI-powered procurement platform, is hiring for a founding-level role to architect AI agentic systems and lead full stack development from backend to frontend. You will shape the product vision with co-founders and early customers, delivering AI-native experiences with rapid prototyping and strong product sensibility.

You should be deeply engaged in AI, shipping, and experimentation, able to move fast while maintaining quality.

Qualifications

• Hands on experience building and deploying LLM powered applications or agentic systems.
• Strong full stack engineering fundamentals across modern JS/TS, Python, REST/GraphQL, and cloud platforms (AWS/GCP/Azure).
• Experience with AI orchestration frameworks such as LangChain, LlamaIndex, AutoGen, CrewAI, or equivalent.
• Strong product and design sensibility with ability to contribute to UX decisions without a dedicated designer.
• Founder mentality: think about product, users, and business outcomes, not just tasks.
• Comfort with ambiguity and building in zero-to-one environments where you create the playbook.

Responsabilités

• Architect and build AI agentic systems from the ground up for new commerce paradigms.
• Own end-to-end full stack development from infrastructure to interface with AI-first thinking.
• Design and build intuitive AI-native user experiences, not just backend logic.
• Prototype quickly and iterate with co-founders and early customers.
• Partner with industry leaders moving fast and set high standards.
• Define technical foundation, stack choices, and engineering culture for a scaling team.
• Operate daily with leadership, high visibility, ownership, and impact.

Connaissances

LLM apps

Full stack

Product design

Founder mindset

Ambiguity tolerance

Fast delivery

Outils

JavaScript/TypeScript

Python

REST/GraphQL

AWS

GCP

Azure

LangChain

LlamaIndex

AutoGen

CrewAI

Description du poste

Fairmarkit is the #1 autonomous sourcing platform revolutionizing the way all organizations buy & sell. Fairmarkit equips procurement teams with automation, AI, and GenAI so they can source more competitively at scale. Our solutions for tail spend and strategic sourcing help innovative procurement teams reduce cycle times, drive out costs, meet ESG/Diversity targets, and provide a better stakeholder experience to internal partners and suppliers. Fairmarkit has been recognized with awards by organizations such as Gartner and IDC, and is backed by strategic investors like Notable Capital, Insight Partners, 1984.VC, and Newfund.

The Role

Fairmarkit is building a brand new AI and Agentic business line from scratch, and we're assembling a small, elite founding team around it. This is one of the first two technical hires on this venture. You'll work directly with co-founders Kevin Frechette and Victor Kushch every day, with zero bureaucracy between your work and real company impact.

We're looking for builders: current, former, or future founders who want to architect something massive from the ground up. You need to already be deep in AI, shipping, experimenting, and living it daily. You should also have a strong eye for product and design, since you'll be shaping not just how this system works but how it looks and feels to use.

What You'll Do

• 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

What You'll Bring

• 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

Bonus Points

• Experience with marketplace or PLG products
• Startup or founder experience
• Experience using AI coding tools extensively
• Experience with procurement, supply chain, or B2B commerce

Headquartered in Boston, and backed by a $35.6M Series C co-led by OMERS, Highland, Notable Capital, Insight Partners, and ServiceNow. We are looking for exceptional candidates who want to help grow our company into a global enterprise and make their mark on the B2B tech industry. Come soar to new heights with us!

Fairmarkit is an equal opportunity employer, and selects individuals best matched for the job based upon job-related qualifications regardless of race, religion, color, creed, sex, sexual orientation, age, ancestry, national origin, gender identity, genetic information, disability, pregnancy, veteran or military status or any other status or characteristic protected by law.