Senior Full-Stack Engineer – Backend-Driven Marketplace

Collectors; Berkeley (CA); Hybrid; USD 141,000 - 229,000; Full time

Benefits offered by this job

Health Insurance

401(k) Matching Plan

Vacation: Flexible time-off

Holiday pay

Employee Discounts

Flexible Hours

Fun Working Environment

Job summary

Collectors, a leading creator of innovative technology for collectors, seeks a Senior Fullstack Engineer to help build scalable marketplace experiences. You’ll contribute to backend services, APIs, and frontend work using JavaScript, TypeScript, React, and NextJS, shaping how products are experienced by users.

Based in the United States with hybrid/remote options, you’ll collaborate across Product and Engineering to deliver end-to-end solutions, embrace modern tooling (Docker, Kubernetes, AWS),

Qualifications

• 5+ years building production applications with strong backend contributions and frontend work.
• Proficiency in Java and Spring Boot is required.
• Experience designing APIs and service integrations for scalable products.

Responsibilities

• Participate in the full software development lifecycle from concept to production release.
• Build backend services, APIs, and data models to support customer experiences and internal workflows.
• Contribute to frontend development using Javascript, Typescript, React, and NextJS.
• Collaborate with Product and Engineering to translate requirements into clean designs.
• Troubleshoot issues across a large distributed codebase.
• Contribute to documentation to improve maintainability and team velocity.
• Advance system design, code quality, and observability across the team.

Skills

Java & Spring Boot

Backend development

Frontend with React/NextJS

APIs & data modeling

Docker & Kubernetes

AWS & cloud services

Tools

Docker

Kubernetes

AWS

ECS

Job description

Collectors, a leading creator of innovative technology for collectors, seeks a Senior Fullstack Engineer to help build scalable marketplace experiences. You’ll contribute to backend services, APIs, and frontend work using JavaScript, TypeScript, React, and NextJS, shaping how products are experienced by users.

Based in the United States with hybrid/remote options, you’ll collaborate across Product and Engineering to deliver end-to-end solutions, embrace modern tooling (Docker, Kubernetes, AWS),