Staff Backend Engineer – Platform & API (Ownership+Equity)

Atrium Staffing LLC; New York (NY); On-site; USD 220,000 - 240,000; Full time

Benefits offered by this job

Equity compensation

Hybrid schedule with remote Fridays

Technical ownership

Leadership exposure

Job summary

Atrium Staffing LLC is actively seeking a Staff Software Engineer, Backend – Platform & API Development to lead the architecture, development, and scalability of its core platform and external API infrastructure. This is a hands-on individual contributor role with significant technical ownership and influence across multiple projects and teams.

The ideal candidate brings extensive backend experience, strong CS fundamentals, and a track record designing complex transactional systems, APIs, and

Qualifications

• 8+ years of professional software engineering experience.
• Hands-on backend engineering experience with production-level applications.
• Experience designing, developing, and launching complex transactional systems.
• Strong experience building external-facing APIs and third-party integrations.
• Deep understanding of relational databases, data modeling, distributed systems, and transactional consistency.
• Demonstrated ability to lead technical initiatives and influence architectural decisions.
• Experience establishing engineering standards and architectural patterns.
• Strong computer science fundamentals and technical problem-solving abilities.
• Experience managing production challenges, system migrations, and reliability improvements.

Responsibilities

• Own architecture, design, and technical roadmap for core backend systems and API infrastructure.
• Design and develop scalable backend services supporting complex transactional workflows.
• Build and maintain external-facing APIs and integrations with third-party platforms.
• Lead the development of reliable systems involving payments, reservations, inventory, and order processing.
• Make foundational architectural decisions involving distributed systems, relational databases, and API design.
• Lead complex technical initiatives from initial design through production deployment.
• Establish reusable engineering patterns, technical standards, and best practices.
• Provide technical guidance and mentorship to engineers while remaining hands-on with production code.
• Collaborate with engineering leadership, Product Managers, and cross-functional stakeholders.
• Identify opportunities to improve system performance, reliability, and scalability.
• Troubleshoot complex production issues, system migrations, and performance challenges.

Skills

Backend engineering

API design

Distributed systems

Relational databases

Technical leadership

Communication

Education

Bachelor's degree in Computer Science

Tools

Ruby on Rails

Node.js

PostgreSQL

AWS

Redis

Kafka

Datadog

OpenSearch

Job description

Atrium Staffing LLC is actively seeking a Staff Software Engineer, Backend – Platform & API Development to lead the architecture, development, and scalability of its core platform and external API infrastructure. This is a hands-on individual contributor role with significant technical ownership and influence across multiple projects and teams.

The ideal candidate brings extensive backend experience, strong CS fundamentals, and a track record designing complex transactional systems, APIs, and