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Poshmark

Software Engineer, Core Infrastructure

Poshmark

Software Engineer focusing on developer experience and microservice development at Poshmark. Collaborating on performance and reliability initiatives within the Core Infrastructure team.

Posted 6/11/2026full-timeRedwood City • California • 🇺🇸 United StatesJuniorWebsite

Tech Stack

Tools & technologies
Distributed SystemsJavaMongoDBNoSQLPythonRabbitMQRedisRubySQL

About the role

Key responsibilities & impact
  • Write high-quality code in Ruby (JRuby), Java, and Python
  • Develop APIs, frameworks, libraries, and services for use by other developers
  • Design and improve architecture to ensure horizontal scalability at all layers
  • Resolve performance issues at all tiers of the application
  • Help shape developer experience, including defining best practices for teams
  • Use AI as a force multiplier in day-to-day engineering work
  • Collaborate with DevOps, security, and SRE teams to integrate compliance, performance, and reliability into the platform

Requirements

What you’ll need
  • 1+ years experience building and operating back-end systems
  • Experience debugging complex problems across an entire stack
  • Familiarity with distributed systems and large-scale engineering challenges
  • Familiarity with NoSQL or SQL databases and experience scaling them
  • Strong communication skills to articulate trade-offs and drive consensus across teams
  • Experience with Ruby (JRuby), Java, Python, MongoDB, OpenSearch, Redis, RabbitMQ, containerization, and *nix environments
  • Solid foundation in computer science with strong competencies in data structures, algorithms, and software design

Benefits

Comp & perks
  • Health insurance
  • Flexible work arrangements

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
RubyJRubyJavaPythonAPIsframeworkslibrariesdata structuresalgorithmssoftware design
Soft Skills
strong communication skillscollaborationproblem-solvingdefining best practicesarticulating trade-offsdriving consensus