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PoshPosh

Senior Software Engineer, Backend

The Senior Backend Engineer will build, scale, and operate production backend services and APIs, taking ownership from design through on-call. The role requires 5+ years of experience with distributed systems, data modeling, cloud infrastructure, and containerized deployments, plus strong technical communication and mentoring skills.

About the job

Responsibilities

  • Build and maintain backend services and APIs powering the platform.
  • Own backend systems end to end, from design through deployment and on-call.
  • Address performance and reliability issues as usage grows, evolving production systems under load.
  • Instrument systems and design security into services from the start.
  • Build data models and pipelines that provide actionable insights.
  • Contribute to design reviews, code reviews, and cross-team technical decisions.
  • Mentor early-career engineers through code review, pairing, and feedback.
  • Participate in technical interviews and calibration.

Requirements

  • 5+ years of backend engineering experience shipping production systems in fast-paced environments.
  • Deep expertise in APIs, data modeling, distributed systems, and event-driven architecture.
  • Proficiency with relevant backend technologies such as Java, Node.js, PostgreSQL, MongoDB, and AWS or similar technologies.
  • Experience with Infrastructure as Code, such as Terraform.
  • Experience deploying containerized applications.
  • Experience scaling systems operationally and evolving live architecture under load.
  • Ability to explain and defend technology tradeoffs to engineering, product, and business stakeholders.
  • GitHub profile or portfolio of past projects.

Nice to Have

  • Experience at a consumer, social, or marketplace company.

Skills

Java, Node.js, Postgres, MongoDB, AWS, Terraform, Docker, APIs, Distributed Systems, Event-Driven Architecture, Data Modeling, Infrastructure As Code

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