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# Senior Frontend Engineer

- **Company:** David Joseph & Company
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Salary:** $150,000.0 - $190,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Cascading Style Sheets (CSS), Python (Programming Language), ReactJS, Flask (Web Framework), Backend, Front End Software Development, Virtual Agents
- **Published:** July 23, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=27a1e5bbe16d77d3

## About the Role

* 5+ years product-facing frontend
 * Strong HTML / CSS / JS fundamentals
 * React (can lead HTMX to React migration)
 * AI-native builder
 * Hybrid: Philadelphia, New York, or DC
 * Portfolio

Green Flags

 * Coded pre-AI, so fundamentals are deep enough to pick up HTMX quickly, and now genuinely AI-native in how they build
 * Early-stage team experience: collaborative, comfortable owning a piece end to end
 * Understands the backend (Python) well enough to be effective, and translates design intent into polished frontend
 * Simplifies complex workflows for users in a B2B setting, and can manage stakeholders (designer, backend, founder)
 * Strong portfolio or side project, and real interest and opinions on human-AI co-working interfaces

Red Flags

 * Purely B2C background with no complex-workflow or B2B experience
 * Five years but purely IC at a large company, no 0-to-1 ownership, no compelling side project or portfolio
 * Not genuinely AI-native in their building
 * A product designer looking for a design role rather than an engineer who owns the build
 * Cannot be based in or commute from Philadelphia, New York, or DC (remote-only is not a fit)

## Description

You'll own the interface where clients work with their AI assistant, from onboarding through daily workflow. Today the product is built with a server-rendered HTMX + Flask approach; the team is splitting its internal and external portals, and the external experience is being rebuilt in React. A key part of this role is spearheading that migration - and the shift from a traditional software interface toward a human-plus-AI co-working workspace where users come in and actually finish the task, not just view data. This is an engineering role, not a design role: there is already a designer, and this person owns the frontend build.

What you'll be doing

 * Own the end-to-end experience users rely on, from onboarding through daily workflow
 * Design interaction patterns that surface what the AI is doing and keep expert users in control
 * Build responsive, performant interfaces on HTMX, Flask templates, and modern CSS/JS, and spearhead the external move to React
 * Partner closely with the designer and backend engineers to turn complex workflows into something that feels simple
 * Own performance, accessibility, and polish - details close deals

Tech stack: HTMX, Flask (Python), modern CSS/JS; external product migrating to React


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