UI Full Stack Developer (WITH AI)

Ampstek; Madison (WI); On-site; USD 100,000 - 150,000; Full time

Job summary

Denari is seeking a full-stack engineer who leans backend, writes TypeScript as a first language, and can build a data-connected frontend in React without a designer holding their hand. This is a high-agency, high-ownership role where a new hire can realistically take full technical ownership of an entire product inside the suite.

The engineering team is small and in heavy build mode — shipping every piece of software an accounting firm needs outside of tax.

Qualifications

• Strong TypeScript proficiency (first language)
• React proficiency (front-to-back)
• Experience designing schemas and data structures that survive real-world use
• Non-trivial track record of shipped products used by real people
• Up-to-date with modern engineering tooling and zeitgeist

Responsibilities

• Design data structures for scalable frontends and data flows
• Build data-connected frontends in React with a backend focus
• Establish patterns and foundations for future engineers
• Own features end-to-end with high agency and ownership
• Collaborate openly and move quickly without extensive specs

Skills

TypeScript

React

Data structures

Backend leaning

shipped product

Modern tooling

Job description

Denari is looking for a full-stack engineer who leans backend, writes TypeScript as a first language, and can build a data-connected frontend in React without a designer holding their hand. This is a high-agency,

high-ownership role where a new hire can realistically take full technical ownership of an entire product inside the suite.

The engineering team is small and in heavy build mode — shipping every piece of software an accounting firm needs outside of tax. The engineer hired here will design data structures, build data-connected frontends, and establish patterns that the next engineers build on top of. Design sense is required. AI is a force multiplier, not a crutch.

Requirements

Technical - Strong TypeScript proficiency — treated as a first language, not a JS migration - React proficiency is non-negotiable — capable front to back, leaning backend - Experience designing schemas and data structures that survive contact with reality - Non-trivial track record — something shipped and used by real people -

Current on modern engineering tooling and the software engineering zeitgeist

Execution and Ownership

High agency, works through ambiguity, does not wait for specs - Design sense —no designers on the team, engineers own the UI - Bias toward ownership, momentum, and open collaboration (no "greater-than-bow energy") - Came from a software business, not a bank IT department or legacy

enterprise

REQUIREMENTS

• Strong TypeScript — treat it as a first language, not a JS migration
• React proficiency (non-negotiable) — build front to back, leaning backend
• Data-connected frontends — not just static UIs
• Schema and data structure design experience
• Non-trivial track record — something shipped and used by real people
• Current on modern tooling and the software engineering zeitgeist
• Design sense — no designers ever, engineers own the UI
• Bias toward ownership, momentum, and open collaboration