Senior Software Engineer
About Proxima
Proxima is a data intelligence company helping consumer brands grow more efficiently. We've built the industry's largest commerce graph of first-party social commerce data, 73M+ unique shoppers, 300M+ ecommerce transactions, and $30B+ in transaction volume, and we turn that into actionable intelligence: predictive audiences, customer personas, LTV modeling, and AI-powered creative insights.
Most brands are stuck working with their own siloed data. Proxima gives them something better: cross-brand, real-time purchase behavior at scale, across platforms like Meta, TikTok, Google, Snapchat, and Pinterest. We believe profitable growth starts with better data and we're building the infrastructure to make that a reality for every consumer brand.
About the Role
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 tools that help independent brands find their best customers and help consumers discover brands they'll love.
This is a true full stack role: from custom AI agents and backend orchestration to clean, responsive UIs. If you thrive in fast-moving environments and are energized by pushing the limits of AI-assisted development, we'd love to talk.
Responsibilities
Build, maintain, and scale full stack applications using TypeScript, React, and Python
Develop end-to-end features across AI agent interfaces, orchestration layers, and developer-facing tools
Write and style responsive UIs using CSS/SCSS
Design, build, and document backend services and APIs
Query and manage relational databases using SQL
Collaborate cross-functionally to ship high-impact features quickly
Own projects from architecture to deployment in an agile, high-velocity environment
Stay current on modern AI development practices and tooling
Qualifications
6+ years of professional software development experience
Proven track record in startup environments — you've shipped fast and worn multiple hats
Strong proficiency in TypeScript, Python, and React
Experience writing production-grade CSS
Solid working knowledge of SQL and relational database design
Demonstrated experience building or integrating AI-powered applications
Daily use of AI-assisted coding tools (Cursor, GitHub Copilot, Claude Code, etc.) — this is a requirement, not a nice-to-have
Comfortable owning projects independently in high-velocity environments
Bachelor's degree or higher in Computer Science, Engineering, or a related field
Preferred Skills
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)
Location
Open to remote candidates based in the U.S. or hybrid candidates in New York City, with a preference for NYC.
Work Authorization: Must be authorized to work in the U.S. without sponsorship. Visa transfers may be considered on a case-by-case basis.
Equal Opportunity Employer
Proxima is proud to be an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.