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Poshmark

Software Engineer II – Core Infrastructure

Poshmark

. Design, develop, and maintain full stack features supporting seller experiences, including listing creation, order management, and inventory management .

Posted 10/8/2026full-timeRedwood City • California • United StatesJuniorMid-LevelWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates proficiency in full stack software engineering, including frontend frameworks like React, Vue, or Angular, and backend languages such as Ruby, Java, JavaScript, or Python. Capable of delivering scalable, efficient, and maintainable systems while collaborating effectively with cross-functional teams.

Highest-signal resume keywords
Full Stack Software EngineeringFrontend Framework ProficiencyBackend Language ProficiencyRESTful API FamiliarityCloud Technologies Interest

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
HTMLCSSJavaScriptTypeScriptReactVueAngularRubyJavaPython
Soft Skills
CollaborativeCuriousMotivated to Learn
Tools & Technologies
RESTful APIsSQL DatabasesNoSQL DatabasesCaching SystemsMessage-Queue SystemsAWSGCP
Certifications & Qualifications
Bachelor’s Degree in Computer Science
Industry Keywords
Software Design PrinciplesData StructuresAlgorithmsUser-Facing Web ApplicationsScalable Architectures

Tech Stack

Tools & technologies
AngularAWSCloudGoogle Cloud PlatformJavaJavaScriptNoSQLPythonReactRubySQLTypeScriptVue.js

About the role

Key responsibilities & impact
  • Design, develop, and maintain full stack features supporting seller experiences, including listing creation, order management, and inventory management
  • Build responsive, accessible, and performant user interfaces using modern frontend frameworks
  • Develop and maintain backend services and APIs powering seller-facing workflows
  • Collaborate with peers and senior engineers to implement scalable, efficient, and maintainable systems across the stack
  • Write clean, well-documented, and well-tested code following best practices
  • Participate in code reviews and improve through feedback
  • Troubleshoot and fix issues across frontend and distributed backend systems in production
  • Improve development processes, tooling, and team workflows
  • Become proficient with the seller pod’s technology stack, development tools, and codebase
  • Ship production-quality full stack features with guidance from senior team members
  • Take ownership of small to medium-sized components or features end-to-end
  • Collaborate with Product, QA, and Design teams on feature delivery
  • Independently deliver full stack features from design to production
  • Contribute to client- and server-side performance improvements and scalability initiatives
  • Develop understanding of system architecture and make data-driven technical decisions
  • Participate in technical discussions and contribute ideas to improve platform reliability, usability, and efficiency
  • Mentor interns or new hires

Requirements

What you’ll need
  • 2–4 years of professional experience, including internships, in full stack software engineering
  • Strong understanding of computer science fundamentals, including data structures, algorithms, and software design principles
  • Proficiency in a modern frontend framework such as React, Vue, or Angular
  • Strong HTML, CSS, and JavaScript/TypeScript skills
  • Proficiency in at least one backend language such as Ruby, Java, Javascript, or Python
  • Familiarity with RESTful APIs, SQL/NoSQL databases, and caching or message-queue systems
  • Experience building responsive, user-facing web applications
  • Interest in cloud technologies such as AWS or GCP and scalable architectures
  • Bachelor’s degree in Computer Science or a related field, or equivalent practical experience
  • Collaborative, curious, and motivated to learn and grow within a fast-paced environment
  • Ability to work from the Redwood City office three days per week
  • Legal authorization to work in the United States

Benefits

Comp & perks
  • No benefits, perks, or additional compensation are specified in the posting