# Senior Backend Software Engineer

> Raydar · New York, United States · Full-time · Posted 2026-09-30

**Salary:** USD 210,000–260,000

**Workplace:** on_site

## Description

About the company

Our client is a healthcare technology company.

The role

Raydar is recruiting for this role on behalf of our client. Serve as the lead backend engineer for an early-stage software platform, owning system design, reliability and delivery across a range of high-stakes services. The work spans real-time data processing, transaction handling and payment flows, with broad architectural influence from day one.

What you'll do

\- Own the full backend, including APIs, database design, access controls, backups, staging environments, monitoring and deployments.

\- Build and operate a real-time pricing service that collects data from several sources on a frequent schedule and routes requests to the best option.

\- Manage data flowing in and out of a third-party processing system where errors have immediate real-world consequences.

\- Design and build an in-house processing engine, validating it against the existing system using replayed production traffic until results match.

\- Own payment infrastructure for incoming and outgoing fund flows, meeting strict uptime targets.

\- Make foundational architecture and schema decisions so the platform scales smoothly as usage grows many times over.

## Requirements

What we're looking for

\- 3+ years of backend engineering experience with strong architecture skills.

\- Experience owning production systems where downtime or errors directly affect revenue, such as payments, ledgers, trading or critical infrastructure.

\- Background in backend-focused full-stack work, system architecture and database schema design.

\- Comfort working as the sole engineer in an early-stage startup environment.

\- Proficiency with AI-assisted development tools.

\- Confidence to challenge technical decisions and give candid pushback to a strong-minded founder.

\- Ability to work in person from the New York office.

\- A computer science or related degree is preferred.

Bonus points

\- Experience at a well-regarded fintech or infrastructure startup.

## Benefits

Compensation and benefits

\- Base salary: USD 210,000 to 260,000 per year

\- Equity

Location and work model

\- New York, NY, United States

\- On-site

\- Full-time

## Apply

[Apply at Raydar](https://apply.workable.com/raydar/j/047D787CAA/apply)

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