Senior Backend Engineer — Onsite NYC, Scale & Impact

Posh; New York (NY); On-site; USD 140,000 - 190,000; Full time

Job summary

Posh is seeking a Senior Backend Engineer to build and scale the systems behind its platform. You will own backend services, design APIs and architectures for high-scale usage, and mentor junior engineers. This is an in-person role based in our New York City office in SoHo, five days a week onsite.

You will work on data models, pipelines, and production-grade software, with a focus on performance, security, and reliability in a consumer/social marketplace environment.

Qualifications

• 5+ years of backend engineering experience with production systems.
• Deep expertise in APIs, data modeling, distributed systems, and event-driven architecture.
• Proficient in stack technologies: Java, Node.js, PostgreSQL, MongoDB, AWS.
• Experience with Infrastructure as Code (Terraform) and deploying containerized apps.
• Has scaled systems in live environments and can justify architectural choices.
• Clear communication of tradeoffs to engineers, product, and business stakeholders.

Responsibilities

• Build and maintain backend services and APIs powering the platform.
• Own backend systems end-to-end from design to deployment and on-call.
• Address performance and reliability as usage grows; evolve live systems.
• Incorporate security considerations from the start in design.
• Create data models and pipelines for actionable business insights.
• Participate in design reviews and cross-team technical decisions.
• Mentor engineers through code reviews and pairing; assist interviews.

Skills

APIs

Data modeling

Distributed systems

Event-driven architecture

Java

Node.js

PostgreSQL

MongoDB

AWS

Terraform

Containerization

Tools

Docker

Kubernetes

Terraform

Job description

Posh is seeking a Senior Backend Engineer to build and scale the systems behind its platform. You will own backend services, design APIs and architectures for high-scale usage, and mentor junior engineers. This is an in-person role based in our New York City office in SoHo, five days a week onsite.

You will work on data models, pipelines, and production-grade software, with a focus on performance, security, and reliability in a consumer/social marketplace environment.