Senior Software Engineer, Full-Stack (Power Packs)

Collaborative Solutions • San Francisco, CA

9d • Hybrid

About The Position

The Power Packs engineering team is responsible for building and operating the customer-facing Power Packs experience, the backend services and internal tools that power pack configuration and purchases, and the integrations with adjacent collection systems that support the full pack lifecycle. We are looking for a Senior Fullstack Engineer who can help build and evolve the systems that power flexible, scalable marketplace experiences across our platform. This role is especially well-suited for an engineer who is strongest on the backend, but also comfortable owning meaningful frontend work to deliver polished end-to-end product experiences. Your work will directly shape how we build APIs and services, connect them to modern web applications, and support new product capabilities such as white-label experiences and new collectible categories. We believe there is significant value in onsite partnership and team collaboration, and candidates within 1-hour commuting distance of the office may be expected to work onsite most of the time. Additional details will be discussed during the recruiting process.

Requirements

• 5+ years of software engineering experience building production applications, with substantial experience in backend systems and meaningful experience delivering frontend product work
• 3+ years experience / strong proficiency in Java and the Spring Boot framework
• Strong fundamentals working with databases and data modeling, both relational (e.g. PostgreSQL) and NoSQL (e.g. DynamoDB)
• Experience designing and building APIs and service integrations that support scalable product development
• 3+ years experience with modern frontend development using Javascript, Typescript, React, and NextJS
• Experience with containerization and orchestration infrastructure (e.g. Docker, Kubernetes, ECS)
• Experience collaborating with Engineering and Product teams to turn complex business requirements into clean, extensible systems and user experiences
• Possess strong technical, analytical, troubleshooting, and communication skills with the ability to visualize and document processes
• Proficient at using appropriate security, documentation, testing, and monitoring best practices
• Familiar with Agile/Scrum methodologies
• Comfortable using AI tooling, preferably Claude, to support solution design, system architecture, and software implementation in day-to-day engineering work

Nice To Haves

• Experience supporting white-label or multi-tenant product architectures
• Experience with distributed messaging systems such as Apache Kafka
• Experience with Python as well as test frameworks such as pytest or unittest
• Experience building applications in the cloud with AWS and familiarity with serverless infrastructure such as AWS Lambda
• Experience contributing to shared design systems
• Experience with Svelte and SvelteKit
• Experience with streaming services such as Twitch
• Experience working across both customer-facing applications and internal tools

Responsibilities

• Participate across the entire software development lifecycle, taking features from concept to production release
• Build backend services, APIs, and data models that support customer-facing product experiences and internal operational workflows
• Contribute to frontend application development using Javascript, Typescript, React, and NextJS to deliver seamless end-to-end experiences
• Collaborate with Product, Engineering, and partner teams to translate business requirements into clean technical designs across both backend and frontend systems
• Troubleshoot data, integration, service, and UI issues across a large distributed codebase
• Contribute to technical documentation to improve maintainability, knowledge sharing, and team velocity
• Help raise the bar on system design, code quality, observability, and engineering best practices across the team
• Leverage AI tooling, with a preference for Claude, to accelerate software design, architecture, and implementation while maintaining strong engineering judgment and code quality

Benefits

• Health Insurance: All full-time employees are eligible to enroll in Medical, Dental, and Vision
• Additional Benefits: Full-time employees are eligible for fertility, commuter, and educational assistance benefits
• 401(K) Matching Plan: We are proud to offer a competitive 401k matching plan to our employees to support their future financial goals
• Vacation: All salaried employees are eligible for flexible time-off
• Holiday Pay: All regular, full-time employees are eligible for ten company paid holidays
• Employee Discounts: Employees receive discounts on select grading services for approved submissions
• Flexible Hours: Many of our teams offer flexible schedules with varying shifts and will work with you to accommodate your needs
• Fun Working Environment: Our team members are invited to participate in celebrations, holiday events, and team building activities

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed