Senior Full Stack Engineer

Summary

Join Proxima's engineering team and build AI-driven products using a unique, real-time transaction data set. As a Senior Full Stack Engineer, you will play a central role in developing intelligent systems, from AI agents to backend services and user interfaces. This full-stack position requires proficiency in TypeScript, React, Python, and SQL, along with experience in AI-powered application development. You will work in a fast-paced, agile environment, collaborating with cross-functional teams to deliver high-impact features. The ideal candidate has 6+ years of software development experience, proven startup experience, and a passion for AI-assisted development. Proxima offers a competitive salary, unlimited PTO, comprehensive health benefits, and a supportive work environment.

Requirements

• 6+ years of professional software development experience
• Proven experience working in startup environments —you’ve shipped products fast and worn multiple hats
• Proficiency with TypeScript , Python , and React
• Experience writing and maintaining CSS in production-grade web apps
• Strong working knowledge of SQL and relational database design
• Demonstrated experience building or integrating with AI-powered applications
• Daily use of AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code, etc.) is required
• Comfortable owning projects independently in a high-velocity development environment
• Bachelor’s degree (or higher) in Computer Science, Engineering, or a related field

Responsibilities

• Build, maintain, and scale full stack applications using TypeScript , React , and Python
• Work on end-to-end features including AI agent interfaces, orchestration layers, and developer-facing tools
• Write and style responsive user interfaces using CSS/SCSS
• Design, build, and document backend services and APIs
• Query and manage relational databases using SQL
• Collaborate with cross-functional teams to iterate quickly and deliver high-impact features
• Own projects from architecture to deployment in a fast-paced, agile environment
• Stay on the cutting edge of modern development practices, especially around AI integration

Preferred Qualifications

• Familiarity with building or managing AI agent frameworks , orchestration tools, or embeddings
• Experience with data engineering workflows (ETL, dbt, Airflow, etc.)
• Knowledge of cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes)

Benefits

• Competitive salary
• Unlimited PTO
• Health benefits for you and your dependents
• Annual memberships to OneMedical and Teladoc
• Summer Fridays (July 4 – Labor Day)
• Weekly in-office team lunch
• 12 weeks paid parental leave
• 401(k) program
• Pre-tax commuter, HSA, and FSA benefits