Proxima is the Conversion Intelligence platform for ecommerce. Powered by a proprietary Commerce Graph spanning 73M+ buyers across 2,000+ ecommerce brands, we help teams understand what actually drives conversion across the broader market, and turn those signals into clear creative direction.
Our data is deterministic (real names, emails, and addresses from actual orders, not inferred from sessions), granular (full SKU-level receipt data), and point-in-time (timestamped history that enables recency scoring and ML without look-ahead bias). Headquartered in New York City, we're a team of operators, builders, and ecommerce veterans solving the hardest problems in modern customer acquisition.
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 and React.
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.
Why Proxima
Work on one of the most differentiated data assets in consumer tech
High ownership and accountability — drive projects end-to-end and make decisions that actually matter
Lean team where your contributions are visible and your voice carries weight
Highly cross-functional — work closely with product, data, growth, and leadership
Hybrid setup in our NYC office with a collaborative in-person culture, plus quarterly team events in and out of the office
Benefits & Perks
Competitive base salary and meaningful equity
Comprehensive medical, dental, and vision coverage
HSA and FSA options
401(k)
12 weeks of fully paid parental leave
Unlimited PTO
Summer Fridays from July 4th through Labor Day
Mental health and wellness support through Talkspace, Health Advocate, and One Medical
Commuter benefits
$1,000 annual learning & development stipend
Quarterly team events, both in and out of the office
How to Apply
Submit your application through our Ashby job board. We review every application and will reach out directly if there's a potential fit.
Proxima is 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. We're committed to building a team that reflects a range of backgrounds, perspectives, and experiences, and we evaluate all candidates on merit.
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