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FirstMate

Fee-free decentralized NFT marketplace aggregator

Software Engineer

Full-TimeUpdated on 10/23/2026
$100k - $140k/yr
Mid
Seattle, WA, USA+1 moreMore locations: San Francisco, CA, USA
In Person
Software EngineeringFull-Stack Engineering

About the job

Requirements
  • Build products with a strong design aesthetic and understand user interface design and customer experience.
  • Know JavaScript, PHP, and React Native.
  • Be fluent in current AI coding techniques beyond high-level tools such as Cursor or Copilot.
  • Thrive in a fast-moving startup environment and work independently without daily direction.
Responsibilities
  • Deliver software features and results at a rapid pace.
  • Work across frontend, backend, databases, and infrastructure, selecting the stack needed to solve problems.
  • Work with raw end-user data and use it to develop product specifications.

About the company

FirstMate operates a decentralized NFT marketplace aggregator that lets creators and collectors buy and sell NFTs without trading fees. It pulls listings from major marketplaces like OpenSea, LooksRare, x2y2, and Foundation to show a single view of available assets. The platform uses decentralized protocols such as Arweave, Seaport, and Reservoir to execute secure, transparent trades and offers creator tools like collector analytics, minting derivatives, and a Discord bot. Its goal is to empower artists and collectors with a fee-free, decentralized marketplace and practical tools, differentiating itself from competitors by removing fees and focusing on creators.

Company Size

1-10

Company Stage

Early VC

Total Funding

$3.8M

Headquarters

New York City, New York

Founded

2022

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Simplify's Take

What believers are saying

  • The 2026 careers page suggests operating momentum despite earlier shutdown claims.
  • Private-environment deployment matches enterprise security demands for engineering tooling.
  • If active, FirstMate targets a large pain point: code quality at scale.

What critics are saying

  • Vincent Declercq said FirstMate shut down by February 2025.
  • Founders moved to Dalton AI, signaling product-market fit failure.
  • The FirstMate name is ambiguous, creating brand confusion and diligence risk.

What makes FirstMate unique

  • FirstMate's AI product used private LLMs and deployed inside customer environments.
  • Its LinkedIn launch emphasized company-context code feedback across engineering teams.
  • Its jobs page advertised engineering leadership and mobile roles in 2026.

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Benefits

  • Hybrid Work Options
  • Training Programs

Company News

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