Software Engineer, Core Infrastructure

Poshmark is the leading fashion marketplace where style comes alive through discovery, self-expression, and human connection. Powered by a vibrant community of 165 million members, Poshmark brings real people and taste to shopping through a social experience shaped by shared discovery. Buying and selling fashion feels simple, joyful, and personal, while every item tells its own story. Poshmark empowers sellers to grow meaningful businesses, keeps fashion in circulation longer, and gives shoppers access to unique and trusted finds, from everyday pieces to one-of-a-kind vintage and luxury.

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:

• Integrate into Team Posh. Focus on building out your working network and get connected with your immediate group, the wider engineering team and the cross-functional teams.

• Learn some amazing technical skills. Get familiar with various parts of Poshmark's code base and infrastructure.

12+ Month Accomplishments:

• Build domain expertise and ownership. Become technically knowledgeable in your assigned area of focus so you can support and grow that area.

• Take control of your growth. Discuss your career aspirations and plan for your career growth with your manager.

Desired Skills:

• 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