Senior Software Engineer, Full-Stack (Power Packs)

Collectors is the leading creator of innovative technology that provides value-added services for collectors worldwide. They are seeking a Senior Fullstack Engineer to build and evolve systems for customer-facing experiences and backend services, while collaborating with various teams to translate requirements into technical designs.

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

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
• 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