Full Stack Engineer at Cox Exponential (CX2)

Feedinkoo; United States; Remote; USD 90,000 - 150,000; Full time

Job summary

Cox Exponential (CX2) is seeking a Fullstack Engineer to join our in‑house tech team, partnering with venture and accelerator teams to prototype, build, and scale cloud‑native web applications and AI agent platforms for portfolio companies. You’ll shepherd startups from proof‑of‑concept to production, leveraging modern web technologies both on the cloud and in the browser.

You will architect and implement services using Node.js, React, and AWS, design databases, prototype MVPs, establish CI/CD

Qualifications

• 2+ years of full stack development with Node.js and React.js (or vanilla JS) in production.
• 2+ years designing and operating AWS infrastructure, including serverless and containerized services.
• Hands-on experience with IaC tools (Terraform, CloudFormation, or CDK).
• Solid understanding of relational and NoSQL database design and optimization.
• Proven ability to build and document RESTful APIs.
• Strong communication skills and comfort working directly with founders.

Responsibilities

• End-to-End Development: Architect and implement web and microservice applications using web technologies (such as but not limited to nodejs/express) on the backend and React.js (or native/vanilla JS) on the frontend.
• AWS: Design, deploy, and optimize AWS services such as ECS/EKS/beanstalk, Lambda, RDS/DynamoDB.
• Database Design: database schema design for relational (PostgreSQL, MySQL) and vector‑enabled stores (pgvector, DynamoDB), ensuring data integrity, performance, and extensibility.
• Prototyping & MVPs: Collaborate directly with founders and product teams to rapidly prototype features, iterate on user feedback, and transition MVPs into robust products.
• CI/CD & Automation: Establish automated pipelines (GitHub Actions, Jenkins, or CircleCI) for testing, security scans, and deployments across environments.
• Monitoring & Reliability: Implement observability—logging, metrics, alerts—and own incident response and post‑mortems to maintain high availability.

Skills

Node.js

React.js

AWS

Terraform/CloudFormation/CDK

Relational DB design

NoSQL DB design

RESTful APIs

Collaboration with founders

AI/LLM integration

WebGL/Three.js visualization

Startup/accelerator experience

Job description

About the Company

Cox Exponential (CX2) is the AI accelerator + early‑stage venture arm of Cox Enterprises. Created by AI founders for AI founders, we’re a team of technologists trained to spot great ideas and build exponential value for startups and businesses. We give startups the unfair advantage of our deep technical expertise and connection to Cox businesses to fast‑track the journey from idea to breakthrough technology.

About the Role

As a Fullstack Engineer at CX2, you’ll be a member of our in‑house technical team and partner with our venture and accelerator teams to prototype, build, and scale cloud‑native web applications and AI agent platforms for portfolio companies. You’ll shepherd startups from proof‑of‑concept to production, leveraging modern web technologies both on the cloud and in the browser.

Responsibilities

• End‑to‑End Development: Architect and implement web and microservice applications using web technologies (such as but not limited to nodejs/express) on the backend and React.js (or native/vanilla JS) on the frontend.
• AWS: Design, deploy, and optimize AWS services such as ECS/EKS/beanstalk, Lambda, RDS/DynamoDB.
• Database Design: database schema design for relational (PostgreSQL, MySQL) and vector‑enabled stores (pgvector, DynamoDB), ensuring data integrity, performance, and extensibility.
• Prototyping & MVPs: Collaborate directly with founders and product teams to rapidly prototype features, iterate on user feedback, and transition MVPs into robust products.
• CI/CD & Automation: Establish automated pipelines (GitHub Actions, Jenkins, or CircleCI) for testing, security scans, and deployments across environments.
• Monitoring & Reliability: Implement observability—logging, metrics, alerts—and own incident response and post‑mortems to maintain high availability.

We collaborate with multiple companies so we expect our team members to be versatile and be passionate to dive in and work with a plethora of technologies.

Qualifications

• 2+ years of full stack development with Node.js and React.js (or vanilla JS) in production.
• 2+ years designing and operating AWS infrastructure, including serverless and containerized services.
• Hands‑on experience with IaC tools (Terraform, CloudFormation, or CDK).
• Solid understanding of relational and NoSQL database design and optimization.
• Proven ability to build and document RESTful APIs.
• Strong communication skills and comfort working directly with founders.

Nice‑to‑Have Skills

• Experience integrating AI/LLM‑based agents (RAG, vector search).
• Familiarity with WebGL/Three.js or SVG based visualizations (beyond basic DOM).
• Startup or accelerator experience.