Note: The job is a remote job and is open to candidates in USA. LendKoi is looking for a Founding Full Stack Engineer to build their lending platform end-to-end. The role involves full-stack feature delivery, fintech integration work, and evolving the infrastructure as the company scales.
Responsibilities
- 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 - the AWS/Beanstalk setup is deliberately simple today and will need to grow with scale
- Raising the engineering bar: testing strategy, observability, performance, and security in a regulated lending domain
Skills
- 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
- 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
Benefits
- The compensation for this role is pay + equity.
- Flexible New York City remote/hybrid.
Company Overview