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# Senior Fullstack Engineer (Backend Focus)

- **Company:** Proxima Inc.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $150,000.0 - $190,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Airflow, Amazon Web Services, Software Applications, Microsoft Azure, Cascading Style Sheets (CSS), Cloud Computing, Information Engineering, Extract Transform Load (ETL), Data Systems, Relational Databases, Cursor (Graphical User Interface Elements), Python (Programming Language), Standard Sql, Software Engineering, Systems Integration, Transaction Data, TypeScript, Workflow Management Systems, Google Cloud, GitHub Copilot, ReactJS, Large Language Models, Multi-Agent Systems, Backend, Data Layers, Containerization, Kubernetes, Information Technology, Virtual Agents, Docker
- **Published:** May 30, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=0616e2232a7cf627

## About the Role

Do you have experience in UI implementation?, * 6+ years of professional software development experience

 * Strong backend proficiency in TypeScript, with solid working knowledge of SQL and relational database design
 * Demonstrated experience building or integrating AI-powered applications - agents, orchestration, or LLM-backed systems
 * Proven track record in startup environments - you've shipped fast and worn multiple hats
 * Comfortable owning projects independently in high-velocity environments
 * Working proficiency in React and the ability to build production UIs when the work calls for it
 * Daily use of AI-assisted coding tools (Cursor, GitHub Copilot, Claude Code, etc.) - this is a requirement, not a nice-to-have
 * Bachelor's degree or higher in Computer Science, Engineering, or a related field

Nice to Have

 * Proficiency in Python
 * Experience with AI agent frameworks, orchestration tools, or embeddings
 * Background in data engineering (ETL, dbt, Airflow, etc.)
 * Familiarity with cloud platforms (AWS, GCP, Azure) and containerization (Docker, Kubernetes)
 * Experience writing production-grade CSS/SCSS

## Description

We're looking for a Senior Full Stack Engineer to help build the AI-driven products at the core of our platform. You'll work directly with our proprietary dataset - real-time, anonymized cross-brand transaction data - to build the services, agents, and tools that power Conversion Intelligence.

This is a full stack role with a center of gravity in the backend. The majority of your work will be backend services, data systems, AI orchestration, and APIs - but you'll also own the UIs that surface this work to users, so you should be genuinely comfortable across the stack. If you thrive in fast-moving environments and are energized by pushing the limits of AI-assisted development, we'd love to talk.

What You'll Own

 * Design, build, and document backend services and APIs that power our AI-driven products
 * Develop end-to-end features across AI agent interfaces, orchestration layers, and developer-facing tools
 * Query, model, and manage relational databases - own the data layer, not just consume it
 * Build and scale the systems that turn cross-brand transaction data into product
 * Ship responsive, clean UIs in TypeScript and React where the product needs them
 * Own projects from architecture to deployment in an agile, high-velocity environment
 * Collaborate cross-functionally to ship high-impact features quickly
 * Stay current on modern AI development practices and tooling


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