lendkoiNew York, NY
Founding Full Stack Engineer
Founding Full Stack Engineer
Founding Full Stack Engineer
lendkoiNew York, NY
Apply for this role (opens in a new tab)yesterday
About the role:
We're looking for a Founding Full Stack Engineer to build our lending platform end-to-end — from the borrower-facing web app through the Django API and the fintech integrations that move money and make loans work. This is a genuinely full-stack codebase, not frontend-with-a-BFF: most features touch both the app and the backend. You'll own problems from ticket to production, raise the engineering bar as the team grows, and work closely with experienced leaders, a cross-functional team, and our vendor partners. The compensation for this role is pay + equity. Flexible New York City hybrid. Full time. The stack you'll work inFrontend: Next.js, React, TypeScript, TanStack React Query, Zustand, React Hook Form + Zod, and a shared component library built on Radix UI + MUI.Schema-first API: OpenAPI schema that generates a fully typed TypeScript client - types flow from Django serializers to React components, so schema drift is caught at compile time, not in production. Infrastructure: AWS (Elastic Beanstalk and core services), GitHub Actions CI/CDFintech Integrations. What you'll own Full-stack feature delivery across the borrower app and the Django API - most features span both. Fintech integration work: new vendor APIs, reliable webhook handling, retry and reconciliation semantics, and payment and loan-servicing workflows. Infrastructure evolution - growing with scale. Raising the engineering bar: testing strategy, observability, performance, and security in a regulated lending domain.
Qualifications:
Strong TypeScript/React (Next.js App Router experience a plus) and strong Python/Django (including Django REST Framework) - this is a genuinely full-stack role.
Comfortable with PostgreSQL data modeling, Celery/queue-based async patterns, and third-party API integration at production quality (idempotency, retries, webhooks).Working AWS knowledge (Beanstalk/EC2, RDS, SQS) - enough to own deploys and debug production.
Strong familiarity with Git, CI/CD pipelines, and automated deployment.
A testing habit - you write tests without being asked (Vitest / Testing Library, Playwright, pytest).Strong command of AI coding tools, with disciplined verification and data-privacy guardrails.
Excellent documentation skills and a commitment to organized, understandable code that scales as the team grows.
Care about correctness with money movement.
Curiosity about fintech and empathy for users - you're passionate about building technology that solves real-world financial challenges.
Founding-engineer temperament: owns problems end-to-end, pragmatic about scope, comfortable with ambiguity and vendor quirks; a self-starter who builds without constant oversight.
Flexible New York City hybrid.
Background check, in-person New York interview, and references required.
Preferred:
Fintech or lending experience - a plus, not a requirement.
Experience with schema-first / OpenAPI-driven development and typed API clients.
Experience with payment processing, loan origination, or loan servicing systems.
Zero-downtime migration discipline and on-call / runbook experience.
CS degree or equivalent hands-on experience.
Why Join LendKoi?
LendKoi is a financial technology company that provides credit and a digital financial suite for immigrants. We're on a mission to empower individuals to achieve stability and thrive. We're an early-stage startup backed by Techstars NYC and top angels with an incredible team.
Mission-driven:
- Be part of a mission to provide fair and accessible credit and unlock opportunities for underbanked communities.
- At The Frontier
- Join a company at the frontier of consumer financial technology, credit, and payments.
- High-impact role
- You will shape how thousands first experience and understand us.
Creative Freedom:
- Test ideas, iterate quickly, and bring personality to fintech.
- Small, fast team
- You'll work closely with the executive team, with plenty of ownership.
- Learn a TonFrom incredibly talented leaders, and genuinely good people; trust and integrity are at the core of how we operate.
Also on the board Same function, level within a rung
Level
Lead
Location
New York, NY
Occupation
Software Developers
Industry
Custom Computer Programming Services
Posted
yesterday