Senior Backend Engineer — Payroll & Ledgers

Posted yesterday

simplex hiresNew York (NY)

Bookkeeping, Accounting, and Auditing Clerks Payroll Services

SENIORITY

Senior

Apply

About the role

Simplex Hires LLC is hiring for a senior backend engineer to own the payroll and financial systems in our NYC office. You will design double-entry ledgers, idempotent payment execution, and reconciliations that auditors can read, partnering with Platform Engineering and store owners to ensure accuracy across payroll, bills, and deposits. You will drive the financial-correctness standards, build integrations, and guide the code quality in a small, ownership-driven team that ships rapidly with

Before you apply

Applying takes about a minute. These four things decide how fast it moves after that.

Your profile is current

It's what we read first. Occupations, seniority and locations matter more than a long history.

Two examples you can talk through

Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.

A number in mind

What you're on now and what would make you move. We negotiate better when we know both.

Your notice period

Employers plan around it, and it's the question that stalls offers most often.

Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.