Full Stack Engineer

Krew; San Francisco (CA); On-site; USD 100,000 - 130,000; Full time

Job summary

A leading FinTech company in San Francisco is seeking a (Human) Member of Technical Staff. The ideal candidate specializes in full-stack engineering, focusing on high-quality code and team collaboration. Responsibilities include designing frontend interfaces and backend APIs, shipping features end-to-end, and enhancing system reliability. Applicants should have 2+ years of full-stack experience, especially with Python and Next JS. This position is integral in supporting our AI-driven solutions for over 100,000 consumers.

Qualifications

• 2+ years of professional non-internship experience in full-stack engineering.
• Experience with backend development using Python or Go.
• Strong code quality habits including testing and documentation.

Responsibilities

• Design and build frontend interfaces with Next JS.
• Develop backend APIs with Python (FastAPI).
• Ship user-facing features end-to-end.
• Enhance reliability and performance across the stack.
• Collaborate with design and compliance teams.
• Participate in code reviews and uphold code quality.

Skills

Full-stack engineering

Backend development

Python

Code quality

Tools

Next JS

FastAPI

Job description

Krew is on a mission to transform credit‑servicing with the industry’s most advanced AI credit‑servicing agents.

We are backed by Long Journey Ventures (Arielle Zuckerberg, Pascal Levy‑Garboua), and strategic angels including Ryan Hoover (Founder, Product Hunt), Charlie Songhurst (Board Member, Meta), and Michael Jones (Former Chair, Huntington Bank Ventures).

We are a talent dense team comprising of ex‑Figure Robotics, Optiver, Artificial Analysis, Bain, the United Nations, UChicago, and Oxford engineers and researchers.

Our omnichannel agents are supporting >100,000 consumers on their pathways to financial wellness. And we’re just getting started – our goal is to resolve more than $1 trillion in outstanding consumer delinquencies worldwide with an empathetic, human‑centric approach to financial wellness.

Job Description

We’re looking for a (Human) Member of Technical Staff specializing in full‑stack engineering. We’re seeking sharp engineers who value high‑quality code, thrive in collaborative teams, and are excited by rapid innovation.

Job Responsibilities

• Design and build frontend interfaces using Next JS
• Design and build backend APIs and services that power our AI agents and operations tooling using Python (FastAPI)
• Ship user‑facing features end‑to‑end (from data model to API to UI)
• Improve reliability, observability, and performance across the stack
• Collaborate closely with design, ops, and risk/compliance to ship safe, compliant features
• Write tests, enforce code quality, and participate in design/review discussions
• Help evolve our engineering standards and product development process

Minimum Qualifications

• At least 2 years of full time professional, non‑internship experience in full‑stack engineering
• Experience with backend development (Python, Go)
• Strong code quality habits (testing, reviews, docs) and a product mindset

Preferred Qualifications

• Experience in FinTech, Risk Management, or Compliance is beneficial but not mandatory
• Experience with LLM/AI‑powered products, event‑driven systems, or data pipelines
• Security, privacy, and auditing best practices
• Bonus points if you were an ex‑founder