Full-Time

AI Infra Engineer

Updated on 9/4/2026

Serotonin

Serotonin

51-200 employees

Marketing product studio for blockchain technology

Compensation Overview

$90k - $150k/yr

New York, NY, USA

Remote

Category
Software Engineering (2)
,
Required Skills
Python
Git
SQL
OpenAI
GraphQL
Blockchain
n8n
LangGraph
Marketing
Next.js
REST APIs
Zapier

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Requirements
  • Python, fluently: pipelines, agent systems, data processing, scripting
  • Active GitHub with meaningful commit history, not forks and tutorials
  • REST and GraphQL API experience building integrations, not configuring connectors
  • SQL: schema design, not just pulling rows
  • Full-stack development: Next.js or equivalent; you've shipped something users interact with in production
  • LLM API usage: building directly with Anthropic or OpenAI APIs, including agent orchestration frameworks (LangGraph, CrewAI, or custom)
  • Vector databases and RAG: embeddings, retrieval pipelines, semantic search
  • Experience ingesting and fusing data from multiple external sources: social APIs (X, LinkedIn), ads APIs (Meta, Google), or similar multi-source environments
  • Ability to translate raw signal into structured, actionable output for non-technical stakeholders
  • Experience building dashboards or reporting layers others depend on operationally, not just internal notebooks
  • No-code tools (Make, n8n, Zapier) are part of your toolkit but they don’t act as the foundation of your practice. You reach for them when they're genuinely the fastest path to a reliable outcome. A strong developer who knows when to use no-code will always outperform a no-code specialist who can't own the harder technical work.
  • Dune Analytics or equivalent SQL querying against on-chain data
  • Familiarity with wallet activity, token flows, and what on-chain behavior signals about an entity or protocol
  • Not required, but you should be the kind of person who picks up a new data domain fast
  • Working knowledge of how GTM and marketing teams operate day to day: PR, content, growth, social. Enough to know where intelligence systems create real leverage. Crypto experience is a meaningful plus
Responsibilities
  • Build and maintain agentic systems that continuously collect, process, and surface signals from social platforms, on-chain data, and ads ecosystems. Turn raw, multi-source data into structured intelligence that informs real account and campaign decisions.
  • Design and maintain the pipelines that power those systems: ingesting from multiple external APIs, enriching and modeling data, and building semantic layers that both humans and AI agents can actually use.
  • Build multi-step AI agents that automate research, synthesis, monitoring, and reporting. Not single-call LLM wrappers, but orchestrated systems with memory, defined tools, and structured output schemas that teams can depend on.
  • Build full-stack applications and dashboards that make intelligence accessible across client accounts. Live tools, not decks.
  • Spend real time with internal teams across marketing, PR, content, growth, and social before writing a line of code. Map how work actually moves, identify where signal gaps create friction, and build systems that solve for multiple teams from a single architecture.
  • Stay ahead of the AI tooling landscape. Know when a no-code connector is the right call and when you need to build. Define how impact gets measured, and build the reporting to prove it.

Serotonin is a marketing firm and product studio that helps breakthrough technology and blockchain companies establish a strong market presence. It combines marketing strategy, product development, and media outreach to support clients through campaigns, product launches, and strategic consulting. The team brings expertise in digital marketing, blockchain technology, and public relations to deliver a holistic service. Unlike general agencies, Serotonin focuses specifically on transformative tech and Web3, offering both branding and hands-on product development to accelerate client growth. The goal is to position brands for breakout success in fast-moving tech and blockchain markets.

Company Size

51-200

Company Stage

N/A

Total Funding

$4.3M

Headquarters

New York City, New York

Founded

2020

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Simplify Jobs

Simplify's Take

What believers are saying

  • Bit Digital named Amanda Cassatt to its board effective January 1, 2026.
  • Web3Connect verified Serotonin in January 2026 as a leading partner.
  • Serotonin's June 2026 platform still promoted new industry content and services.

What critics are saying

  • Serotonin remains tied to crypto budgets, especially clients like Ripple and TON.
  • Regulatory crackdowns on Web3 marketing hit agencies first, cutting demand fast.
  • If blockchain adoption stalls, Serotonin's agency pipeline shrinks and product studio loses funding.

What makes Serotonin unique

  • Amanda Cassatt built Serotonin from ConsenSys-era Ethereum marketing.
  • Serotonin claims 100-plus Web3 clients, including Arbitrum, Circle, and Polygon.
  • Its studio spawned Spindl, later acquired by Coinbase, proving product creation.

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Benefits

Competitive Salary

Health Insurance

Remote Work Environment

Company News

The Block
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Securities.io
Mar 20th, 2024
From La To Riyadh: Outer Edge Web3 Innovation Summit Debuts In Saudi Arabia In Partnership With Animoca Brands And Kacst

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BeInCrypto
Nov 25th, 2022
Web3 Gaming Sucks: The Struggle With User Experience

For years, playing video games was relatively simple. You turned on your computer or console, booted up your game of choice, loaded a previous save (or jumped straight into online play), and had fun. However, within the last year or so, a new library of terms has entered the lexicon. Whether it’s play-to-earn, play-to-own, wallet, GameFi, or the much-maligned ‘NFT,’ gaming is becoming a little more complicated