Senior Full Stack Engineer (Remote) | FuseAI (YC W25)

FuseAI (YC W25); Cantabria; A distancia; EUR 60.000 - 100.000; Jornada completa

Descripción de la vacante

Join a pioneering startup on a mission to transform enterprise automation with AI-driven solutions. As a Senior Full Stack Engineer, you'll work alongside seasoned founders to develop innovative software that enhances sales processes. This role offers the chance to shape the future of sales automation while working in a dynamic, remote-first environment. With a focus on rapid iteration and continuous learning, your contributions will directly impact the company's growth and success. If you're passionate about AI and eager to make a difference, this is the opportunity for you.

Servicios

Stock Options

Competitive Compensation

Remote Work

Mentorship from Elite Leaders

Formación

• 3+ years of full-stack development experience.
• Proficiency in React, Node.js, MongoDB, and AWS.
• Experience with microservices and Chrome extensions.

Responsabilidades

• Develop and maintain end-to-end features across the tech stack.
• Collaborate with the CTO to build and ship features rapidly.
• Optimize performance and scalability in a microservices architecture.

Conocimientos

React

Node.js

MongoDB

AWS

Microservices

Chrome Extensions

AI-driven Automation

Langchain

Descripción del empleo

FuseAI is a Y Combinator-backed startup on a mission to revolutionize enterprise automation with vertical AI agents. We’re building a new agentic operating system designed to transform how GTM (Go-To-Market) teams operate—think Salesforce meets OpenAI Operator. Our platform empowers organizations to automate their entire sales cycle through an AI-powered interface, streamlining lead generation, customer engagement, and deal management in seconds. Our AI Agents replace bloated sales tech stacks, making teams 10x more productive. With a powerhouse founding team that combines deep GTM expertise and a decade of machine learning innovation, FuseAI is positioned for exponential success. This is your chance to be part of something groundbreaking.

The Role

We’re looking for a Senior Full Stack Engineer to join our fast-paced, high-impact engineering team. You will work directly with our co-founder and CTO, an AI startup veteran with a successful exit, a decade of ML experience, and a Forbes 30 Under 30 recognition. As a core team member, you’ll have the opportunity to shape the future of AI-powered sales automation while building world-class software at breakneck speed.

What You’ll Do

• Architect, develop, test, and maintain end-to-end features across our stack (React, Node.js, MongoDB, AWS, microservices, and Chrome extensions).
• Collaborate closely with the CTO and engineering team to build and ship features rapidly.
• Design and implement scalable, high-performance AI-driven applications.
• Optimize system performance, reliability, and scalability in a microservices architecture.
• Experiment with AI agent architectures (bonus points for Langchain experience).
• Contribute to a culture of rapid iteration, continuous learning, and engineering excellence.

What We’re Looking For

• 3+ years of experience in full-stack development, with proficiency in React, Node.js, MongoDB, and AWS.
• Experience working with microservices architecture and Chrome extensions.
• Ability to thrive in an ultra-fast-paced startup environment where we ship daily.
• Passion for AI-driven automation and interest in Langchain or agent architectures is a plus.
• Experience working with sales tools or GTM automation is a bonus.
• High agency with a bias for action and ownership.
• Strong communication skills with proficiency in English.

Why Join Us?

• Work directly with world-class founders. Get mentorship from elite technical leaders and be a core part of building something game-changing.
• Make an extreme impact. Your work will directly shape the future of AI-powered GTM automation.
• Remote-first. Work from anywhere with WiFi while collaborating with an all-star team.
• Y Combinator-backed. Join a company with strong venture backing, high growth potential, and a massive market opportunity.
• Competitive compensation. A mix of stock options and cash to ensure you have skin in the game.

This is not an average 9-to-5 job—this is a starship. If you’re ready to push boundaries, move fast, and build the future of AI-powered sales, we’d love to hear from you!

Apply on LinkedIn with your resume, plus a cover letter that gets us hyped. You can also email Imogen directly at