Customer Success Engineer

Customer Success Engineer (Full Stack) 

Your Opportunity

Fluint is an early-stage startup building the platform and AI Agent (“Olli") for complex, B2B sales.

You’ll be joining a team on the leading edge in revenue tech:

• Building AI for a massive market shift. We’re creating AI to ride a fundamental shift in how B2B sales work: by helping buyers champion products internally — where 90% of purchasing decisions actually happen. It’s a new category, in a multi-billion dollar space.
   
• See your impact in real dollars. Your code directly helps sales teams close deals. When you ship a feature, you'll hear, “Yo! This helped me land a $250K deal!” Or, “We just closed 3 months faster because of this." Every line of your code translates to real revenue impact.
   
• Small team, big ownership. Join a founder-led startup with 500+ happy customers and proven product-market fit. Work directly with technical leadership, and have real influence over architecture and product direction as the company scales.
   
• Plus, we’re an AI-native company with tech advantages over, (1) legacy sales tech players; (2) “horizontal” platforms, in our core customer profile — complex sales. Backed by VC firms like Mucker and Drive Capital, with strong inbound demand, and traction upmarket.
   

Tech Stack

• Frontend: Vite, Typescript, React
• Backend: NestJS, Docker
• Data: Mongo, Redis
• Infrastructure: Terraform, AWS, Docker
• Support Tools: You’ll evaluate and own to build our stack.
   

The Job, An Overview

You'll work hand-in-hand with our Customer Success and Engineering teams, serving as the technical problem-solver who ensures our customers achieve their goals with Fluint.

This means diving into a dynamic role requiring deep customer empathy, technical problem-solving skills, and the ability to communicate complex solutions clearly. You'll have significant autonomy to own customer relationships and drive technical solutions.

We're looking for someone who genuinely cares about customer success, enjoys debugging complex issues, and wants to directly impact our product roadmap based on real customer feedback. Using both the right and left sides of their brain, so you’ll need to have a track record working across our stack, with a focus on creative, customer-facing solutions.

Your Day-to-Day

• Customer Interaction: Engage directly with customers via calls, emails, and chat to understand their technical challenges and use cases
   
• Technical Problem-Solving: Diagnose issues across our full stack, from API integrations to frontend bugs, and implement solutions
   
• Solution Implementation: Build custom integrations, write scripts, and develop workarounds to solve specific customer needs
   
• Cross-Team Collaboration: Work closely with Customer Success to understand account health and with Engineering to prioritize bug fixes and feature requests
   
• Documentation: Create and maintain technical documentation, troubleshooting guides, and best practices for both internal teams and customers
   
• Product Feedback: Translate customer pain points into detailed requirements and advocate for customer needs in product planning

The Human We’re Looking For

• Customer-Obsessed: You genuinely care about customer success and take pride in solving their problems, even the complex ones
   
• Technically Curious: You love digging into technical issues and aren't satisfied until you understand the root cause
   
• Communication Skills: You can explain complex technical concepts to non-technical users and advocate for customer needs with engineering teams
   
• Resourceful: You're comfortable working with limited information and can creatively solve problems with available tools
   
• Adaptable: You thrive in a fast-paced startup environment where priorities shift and you need to wear multiple hats
   
• Proactive: You don't wait for problems to escalate – you identify potential issues and address them before they impact customers

Product Philosophy

We heavily invest in solid product foundations and believe the right people in the right roles deliver far more impact than just adding headcount. Customer pain is our pain – we feel it and want to fix it through direct customer interaction and rapid iteration.

To Apply

Our founders and most of the team is based in Denver, CO, but we have a hybrid work setup, with engineers in 3 states. (We’re out to find the right people, but Denver’s a plus.)

If you’re interested, email your resume to [email protected], with "CS Engineer" in the subject.

Instead of a traditional cover letter, please answer these two questions in your email:
 

(1) Describe a time you solved a complex technical problem for a customer. What was the issue and how did you approach it?

(2) What's your philosophy on balancing quick fixes vs. long-term solutions when customers are experiencing issues?

After, our process is a 15-minute call with our team, and if we both agree there's potential, a technical case study and customer scenario interview.