Senior Software Engineer
Proxima
New York, NY 10012$150,000 - $190,000 a yearFull Time
Job Description
About Proxima
Most companies spend years trying to understand their customers. We already know them. Proxima is a data intelligence platform built on a proprietary, real-time database of over 60 million anonymized shopper personas — and growing. We give B2C businesses the AI-powered intelligence they need to acquire customers profitably, retain them efficiently, and operate smarter at scale.
We're on a mission to put institutional-grade data intelligence within reach of every brand — not just the giants. Profitable growth starts with better data, and we've built the engine to prove it.
About the Role
Proxima has a unique dataset most companies only dream of: real-time, anonymized cross-brand transaction data at scale.
We're looking for a Senior Software Engineer to join our team building AI-driven products powered by this data — helping independent brands find their perfect customers while helping consumers discover their next favorite products from businesses they've never heard of.
You'll be one of the first engineers to shape our AI agent layer — building the intelligent systems, backend services, and interfaces that sit at the core of our product. This is a true full stack role, ideal for engineers who are as passionate about crafting polished front-end experiences as they are about building robust APIs and working with data.
If you thrive in fast-paced, startup environments and love pushing the limits of AI-assisted development, we want to talk to you.
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
Qualifications
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
Proficiency with AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code) is required
Comfortable with a high degree of autonomy and accountability
Bachelor's degree in Computer Science or a related field, or equivalent practical experience
Nice to Have
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)
Why Join Our Engineering Team
Join a lean, senior engineering team where your contributions are visible and your voice carries weight
High ownership and accountability — you'll drive projects end-to-end and make meaningful architectural decisions
A fast, iterative, and supportive development environment where your work has real impact
Highly cross-functional role — you'll work closely with product, data, and business teams, not just engineering
Hybrid setup in our New York City office, with a collaborative in-person culture
Compensation Range: $150K - $190K
Most companies spend years trying to understand their customers. We already know them. Proxima is a data intelligence platform built on a proprietary, real-time database of over 60 million anonymized shopper personas — and growing. We give B2C businesses the AI-powered intelligence they need to acquire customers profitably, retain them efficiently, and operate smarter at scale.
We're on a mission to put institutional-grade data intelligence within reach of every brand — not just the giants. Profitable growth starts with better data, and we've built the engine to prove it.
About the Role
Proxima has a unique dataset most companies only dream of: real-time, anonymized cross-brand transaction data at scale.
We're looking for a Senior Software Engineer to join our team building AI-driven products powered by this data — helping independent brands find their perfect customers while helping consumers discover their next favorite products from businesses they've never heard of.
You'll be one of the first engineers to shape our AI agent layer — building the intelligent systems, backend services, and interfaces that sit at the core of our product. This is a true full stack role, ideal for engineers who are as passionate about crafting polished front-end experiences as they are about building robust APIs and working with data.
If you thrive in fast-paced, startup environments and love pushing the limits of AI-assisted development, we want to talk to you.
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
Qualifications
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
Proficiency with AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code) is required
Comfortable with a high degree of autonomy and accountability
Bachelor's degree in Computer Science or a related field, or equivalent practical experience
Nice to Have
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)
Why Join Our Engineering Team
Join a lean, senior engineering team where your contributions are visible and your voice carries weight
High ownership and accountability — you'll drive projects end-to-end and make meaningful architectural decisions
A fast, iterative, and supportive development environment where your work has real impact
Highly cross-functional role — you'll work closely with product, data, and business teams, not just engineering
Hybrid setup in our New York City office, with a collaborative in-person culture
Compensation Range: $150K - $190K