Fullstack engineer with Ai integration - Remote US or Canada

Qualifications

• A Mid-Level to Upper Mid-Level Full-Stack Engineer (NOT junior, NOT senior, NOT a manager)
• 5–8 years of hands-on IC engineering experience
• focused only on APIs or infrastructure
• Hands-on experience with user-facing products, experimentation, UI + backend
• Preferably 2–5+ years at a VC-backed SaaS or product company
• People Who Have Worked in the USA Long Enough
• “only 1 year of USA experience”
• “limited experience in USA”
• 2+ years of full-time work experience at US tech companies
• being from massive corporations
• lacking product-centric work
• not having customer-facing ownership
• agency background
• freelance for 16 years
• consulting instead of building internal products
• Full-time ICs who shipped and owned a product roadmap
• A 5–8 year full-stack engineer who has:
• Experience at high-growth startups (not big enterprise)
• Strong product sense + customer-facing feature experience
• Solid backend + frontend balance
• Full-time IC roles (not agency, not freelance, not consulting)
• 2+ years working at US tech companies
• They want a mid-level full-stack product engineer with real startup experience, US work history, and hands-on feature-building—not infra, not SRE, not enterprise, not freelancers, and not managers
• 5-7 years of full-stack software engineering experience and you can build products end-to-end (frontend + backend)
• Bonus: fluency in NextJS + React + Typescript stack, comfortable making UX decisions
• 1-2 years of proven experience building and shipping user-facing LLM products
• Bonus: you have iterated on a product through evals & CI/CD
• Ability to thrive in a fast-paced environment, startup experience
• Excellent communication skills (oral & written)
• Bonus: also excellent at communicating with AI (prompting)
• Front-end: Typescript, React, Next.js

Benefits

• Learn an insane amount about the nuts & bolts of clean energy finance

Responsibilities

• Full-stack engineers who build customer-facing features
• You won’t just be building features — you’ll be co-designing the processes and systems that define how we ship high-quality AI products at Crux
• Collaborate directly with customers
• Build products from 0 -> 1
• Pick the tools & frameworks we use

Full Description

Please dont apply unless you fit below.

What This Client Is Actually Looking For1.

A Mid-Level to Upper Mid-Level Full-Stack Engineer (NOT junior, NOT senior, NOT a manager)

They repeatedly reject:

• “too junior”

• “too senior”

• “director level”

• “management-focused vs IC”

Target level:

5–8 years of hands-on IC engineering experience

Not junior, not leadership, not executive

True Full-Stack, Product-Centric Engineers

They reject candidates who are:

• too frontend

• too backend

• too cloud/SRE/DevOps

• focused only on APIs or infrastructure

• not product/feature-focused

They want:

Full-stack engineers who build customer-facing features

Hands-on experience with user-facing products, experimentation, UI + backend

Strong Startup Experience (High-Growth, SaaS, Product-Led)

They consistently reject:

• big company engineers

• agency contractors

• freelancers

• consultants

• people who work “for others” instead of inside a product org

• people without startup experience

They want:

Engineers who have built software inside a high-growth tech startup

Preferably 2–5+ years at a VC-backed SaaS or product company

People Who Have Worked in the USA Long Enough

They reject:

• “only 1 year of USA experience”

• “limited experience in USA”

They prefer:

2+ years of full-time work experience at US tech companies

Not Too Corporate, Not Too Enterprise

Rejected for:

• being from massive corporations

• lacking product-centric work

• not having customer-facing ownership

They want:

Engineers used to startup environments where you ship quickly, own features, and iterate.

Solid Internal Product Engineering — Not Agencies, Not Contractors

Rejected for:

• agency background

• freelance for 16 years

• consulting instead of building internal products

They want:

Full-time ICs who shipped and owned a product roadmap.

Summary: The Ideal Candidate Profile

A 5–8 year full-stack engineer who has:

Experience at high-growth startups (not big enterprise)

Strong product sense + customer-facing feature experience

Solid backend + frontend balance

Full-time IC roles (not agency, not freelance, not consulting)

Built internal tools, platforms, AND external user features

2+ years working at US tech companies

No over-seniority or management-heavy roles

One-Sentence Summary

They want a mid-level full-stack product engineer with real startup experience, US work history, and hands-on feature-building—not infra, not SRE, not enterprise, not freelancers, and not managers.

The Role

The traditional process for financing clean energy is manual, opaque, and slow.

We’ve built products that solve part of that problem — now we’re expanding their breadth and depth with AI.

We’re hiring our first AI Product Engineer to work hand-in-hand with customers, product, commercial, and legal teams to reimagine the way transactions happen in clean energy finance, starting with diligence.

You won’t just be building features — you’ll be co-designing the processes and systems that define how we ship high-quality AI products at Crux.

Much of this framework doesn’t exist yet — and you’ll help invent it using first principles.

What you'll do

Collaborate directly with customers

Build products from 0 -> 1

Pick the tools & frameworks we use

Learn an insane amount about the nuts & bolts of clean energy finance

Raise the bar for our engineering culture

Skills

1. 5-7 years of full-stack software engineering experience and you can build products end-to-end (frontend + backend)

Bonus: fluency in NextJS + React + Typescript stack, comfortable making UX decisions

2. 1-2 years of proven experience building and shipping user-facing LLM products

Bonus: you have iterated on a product through evals & CI/CD

3. Ability to thrive in a fast-paced environment, startup experience

4. Excellent communication skills (oral & written)

Bonus: also excellent at communicating with AI (prompting)

• Front-end: Typescript, React, Next.js

• Back-end: Supabase, Postgres

Employment Type: FULL_TIME