Job Description

We are looking for a Mid to Senior Software Engineer to join the Item Domain team within a luxury resale marketplace (Sales & Retail: Pricing, Payments, and Merchandising Tools).

This role focuses primarily on backend services and internal tooling, while also supporting web applications used by shoppers and operators for listing, enrichment, and merchandising.

You will collaborate closely with product, design, and engineering leadership to build scalable and high-quality solutions that directly impact company-wide initiatives.

Key Responsibilities

Develop high-quality, scalable, and testable code
Build and maintain backend services and internal tools
Contribute to web applications for internal and external users
Participate in technical decision-making and system design
Review pull requests and provide constructive feedback
Collaborate closely with cross-functional teams (Product, Design, Engineering)
Support onboarding and pair programming when needed
Ensure reliable and maintainable systems through observability and best practices
Deploy production-ready code responsibly

Tech Stack

Backend: Java, Kotlin (JVM), Ruby, Python, Elixir
Frontend: React, TypeScript, JavaScript frameworks
APIs & Data: GraphQL, REST
Infrastructure: AWS (Lambda), Kafka, PostgreSQL, DynamoDB
Tools: Git, CI/CD pipelines, observability tools

Required Skills & Experience

+5 years of software engineering experience
Strong backend development experience
Required tech stack combination:
- Java + Ruby OR
- Java + Python
Experience with JavaScript frameworks (e.g., React)
Strong understanding of building production-ready systems (reliability, scalability, security)
Experience with APIs (REST/GraphQL) and event-driven architectures (e.g., Kafka)
Strong communication skills with stakeholders and cross-functional teams
Experience contributing to technical decisions (architecture, standards, delivery)
Familiarity with version control, IDEs, and deployment tools
Bachelor’s degree in Computer Science or equivalent experience

Nice to Have

Kotlin and/or Elixir experience (highly preferred in combination with required stack)
Full-stack experience (strong backend focus preferred)
Experience with AI-assisted coding tools (Cursor, Claude Code)
Experience integrating LLMs or AI APIs into applications
Experience with microservices architecture
Experience in eCommerce platforms
Experience with CMS tools (e.g., Prismic)
Experience with monitoring, dashboards, and incident response

What We Offer

✅ 100% remote opportunity
✅ Opportunity to work on cutting-edge AI projects
✅ Collaboration with leading Frontier LLM companies
✅ International and innovation-driven environment
✅ Potential contract extension based on performance and project needs

Sr Software Engineer (Java+Ruby / Java+...