Poshmark

Senior Software Engineer, Core Infrastructure

Poshmark • $137K — $193K *
Redwood City, CA 94061In-Person
Information Technology
Less than 5 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 4+ years of experience in back-end systems development
  • Experience debugging complex problems across the entire stack
  • Familiarity with distributed systems and large-scale engineering challenges
  • Knowledge of NoSQL or SQL databases and scaling techniques
  • Strong communication skills for articulating technical trade-offs and driving team consensus
  • Experience with Ruby (JRuby), Java, Python, and related technologies like MongoDB and Redis
  • Solid foundation in computer science principles, particularly in data structures and algorithms

Responsibilities

  • Write high-quality code in Ruby (JRuby), Java, and Python
  • Develop APIs, frameworks, libraries, and services for other developers
  • Design and enhance architecture for horizontal scalability
  • Resolve performance issues across all application tiers
  • Shape developer experience by defining best practices
  • Leverage AI to augment daily engineering tasks
  • Collaborate with DevOps, security, and SRE teams to ensure platform compliance and reliability

Benefits

  • Opportunities for mentoring and guiding junior engineers
  • Collaborative culture with close partnerships across teams
  • Focus on engineering enablement and improving developer experience
  • Potential for high-impact project involvement
  • Exposure to diverse technologies and microservices architecture
Full Job Description
Job Description:

Job title: Senior Software Engineer, Core Infrastructure

The Core Infrastructure team drives developer experience, microservice development, and performance and reliability related initiatives. Developer experience covers anything that a team might need in order to build, release, run, and support software; for example, ensuring automated tests stay fast and stable. Poshmark's first platform was largely a monolith written in JRuby. Today that monolith is being broken up into smaller microservices written in Java, JRuby, and Python. The Core Infrastructure team develops the microservice frameworks and core libraries used by other teams.

Responsibilities:
  • 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 in order to ensure horizontal scalability at all layers
  • Resolve issues related to performance at all tiers of the application
  • Help shape developer experience a.k.a. engineering enablement at Poshmark, including defining what best practices every team should be following
  • Use AI as a force multiplier in day-to-day engineering work
  • Closely partner with the DevOps, security, and SRE teams to bake compliance, performance, and reliability into the platform

6-Month Accomplishments:
  • Able to plan medium complexity projects with no supervision
  • Provides meaningful design feedback and code reviews to peers
  • Actively mentors junior engineers, guiding them through complex technical tasks and fostering their career development


12+ Month Accomplishments:
  • Able to find technical solutions to large complexity problems with minimal supervision
  • Able to identify architectural gaps and propose solutions
  • Have rolled out a high impact project to production

Desired Skills:
  • 4+ years experience building and operating back-end systems
  • You have experience debugging complex problems across an entire stack
  • You have worked on and/or understand distributed systems and large scale engineering challenges
  • You are familiar with either NoSQL or SQL databases and have experience scaling them
  • You are a strong communicator who can articulate trade-offs and drive consensus across teams
  • Experience with any of: Ruby (JRuby), Java, Python, MongoDB, OpenSearch, Redis, RabbitMQ, containerization, and *nix environments
  • A solid foundation in computer science with strong competencies in data structures, algorithms, and software design

Salary Range:
$137,255.00 - $193,872.50 Annual

About Poshmark

Poshmark is an online marketplace that allows users to buy and sell new and used clothing, shoes, and accessories. The company was founded in 2011 and is headquartered in Redwood City, California. Poshmark's platform is designed to make it easy for users to buy and sell items, with features like in-app payments, shipping labels, and seller ratings. Poshmark has raised over $150 million in funding and has been recognized as one of the fastest-growing companies in the United States.
Learn more about Poshmark
Size
600 employees
Market Cap
$1.4 billion
Industry
Retail & Consumer Goods
Net Income
$6.1 million
Founded
2011
Revenue
$262 million
NASDAQ
POSH
* Ladders Estimates

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