Full-stack, Backend Leaning, SWE
Software Engineering
USD 150k-240k / year + Equity
Posted on Jun 27, 2026
About This Role
There is an enormous gap between the technology available in Silicon Valley and what the average small business owner in America actually has access to. The pharmacist in rural Louisiana. The auto dealer in the midwest. The vet clinic owner who has been doing their books the same way for twenty years. They are running the businesses that hold American communities together, and the infrastructure serving them has never reflected how important they actually are. Affiniti is closing that gap. We're building the financial operating system for small businesses across America, and the backend is what makes it real. The systems you architect, the APIs you build, the data pipelines you design are what turn a great idea into something tens of millions of business owners can actually depend on. Reliability, speed, and correctness are not engineering virtues here. They are the product. If you want to write code that matters beyond the pull request, this is that opportunity.
About Affiniti, and who we look for:
LOCATION NYC, VAN, TO
EXPERIENCE We are hiring for multiple engineers with 2+ YOE. There is no upper limit.
TOTAL COMPENSATION
$150K to $240K + Equity
(Location and experience adjusted)
BENEFITS
Reimbursed Relocation
Free Lunch and Dinner (In NYC)
Paid Technology Equipment Set Up
Health, Dental, and Vision Insurance Fully Covered
Key Responsibilities
Design and build robust, scalable backend systems, APIs, services, and data pipelines, that power real financial workflows for SMB owners across America
Own system architecture decisions end-to-end: define service boundaries, design data models, evaluate tradeoffs, and document decisions that the team can reason about and build on
Move fast without breaking things. Ship features quickly, write code that's easy to maintain, and build in the observability and testing that lets you iterate with confidence
Translate ambiguous customer and stakeholder problems into crisp technical specs, then execute them with minimal hand-holding
Operate what you build: monitor production systems, debug hard problems, and take ownership when things go wrong
Raise the technical bar around you: participate in design reviews, give sharp code review feedback, and improve the systems and processes the whole team depends on
Qualifications
2+ years of production engineering experience. Early-stage startup experience is preferred.
Deep fluency in TypeScript and Node.js / Express; you know the language well enough to have strong opinions about it
Proven ability to architect end-to-end systems. You think in service boundaries, data flows, and failure modes before writing a single line of code
Strong at picking up context fast and making accurate technical decisions under ambiguity. You don't need perfect requirements to move
Detail-oriented without being slow: you catch the edge case and still close the PR
A high ownership, do what it takes mentality, that doesn’t see a job as “just a job”
It’s About Time Someone Revived The Backbone Economy
If you’re interested, email aaron@affiniti.com and sahil@affiniti.com with a brief description on why we should chat!