We are seeking a hands-on Senior Software Engineer who can help design, build, and launch our platform from the ground up.
Position Overview
The Senior Software Engineer will work directly with the company founder and product leadership to translate business concepts into a secure, scalable, and user-friendly product.
This is a highly hands-on role. The successful candidate will contribute across backend development, frontend development, database design, cloud infrastructure, API integration, automation, and technical architecture.
The engineer will also help build internal tools supporting our live-commerce operations, including inventory management, product cataloging, pricing analysis, order reconciliation, and operational reporting.
Key Responsibilities
Product Development
* Design and build a responsive web platform for trading-card collectors
* Develop user registration, authentication, account, and profile functionality
* Build card-search, collection-management, want-list, and trade-list features
* Develop user-to-user trade proposals, counteroffers, acceptance, and trade-history workflows
* Build messaging, notification, reputation, and trust-related functionality
* Create administrative tools for managing users, cards, inventory, listings, and trades
* Develop mobile-responsive interfaces suitable for desktop and mobile users
Backend and API Development
* Design and develop backend services using Java and Spring Boot
* Build secure RESTful APIs for frontend, mobile, and third-party integrations
* Design service boundaries and scalable application architecture
* Integrate card-catalog, pricing, marketplace, shipping, and notification data sources
* Develop business logic for card variants, languages, conditions, grading, ownership, and trades
* Implement role-based authorization and secure access controls
* Create reliable background jobs and data-processing workflows
Frontend Development
* Develop user-facing applications using React and related frontend technologies
* Translate product requirements and design prototypes into functional interfaces
* Build reusable frontend components and consistent user experiences
* Optimize frontend performance, responsiveness, and accessibility
* Collaborate with product and design resources to improve collector workflows
Database and Data Engineering
* Design PostgreSQL data models for users, cards, sets, collections, inventory, listings, prices, and trades
* Build reliable data-ingestion and synchronization processes
* Maintain data quality across card catalogs and pricing sources
* Develop analytics-ready data structures and operational reporting
* Support pricing history, collection valuation, and marketplace trend analysis
Live-Commerce and Internal Operations
* Build internal tools supporting Pokémon card sales on Whatnot and other channels
* Develop inventory tracking and product-numbering workflows
* Support auction preparation, listing creation, and sold-item reconciliation
* Automate order, shipping, inventory, and profitability reporting where platform access permits
* Help create dashboards for sales, inventory cost, gross margin, repeat buyers, and product performance
* Reduce manual work through Python-based automation and system integration
Cloud, DevOps, and Security
* Deploy and maintain applications on AWS
* Design cloud infrastructure appropriate for an early-stage production platform
* Build and maintain CI/CD pipelines
* Implement logging, monitoring, testing, backup, and recovery processes
* Maintain Git-based development and code-review practices
* Apply secure-development standards for authentication, personal data, APIs, and cloud resources
* Help ensure the platform can scale as users, inventory, and transaction volume grow
Technical Leadership
* Recommend practical technology and architecture decisions
* Balance development speed with security, scalability, and maintainability
* Establish coding standards, technical documentation, and development processes
* Review code and provide guidance to future engineers or contractors
* Evaluate third-party tools, APIs, data providers, and infrastructure services
* Help define the long-term engineering roadmap
Required Qualifications
* Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field
* Eight or more years of professional software-engineering experience
* Strong professional experience with Java
* Five or more years of experience with Spring Boot or similar Java frameworks
* Experience designing and developing microservices or modular service-oriented applications
* Strong experience building RESTful web services and APIs
* Professional experience with React or another modern JavaScript frontend framework
* Experience designing and maintaining PostgreSQL or similar relational databases
* Experience with Git, automated testing, code reviews, and CI/CD pipelines
* Hands-on experience deploying and operating applications in AWS
* Strong understanding of software architecture, application security, and production support
* Ability to independently take features from requirements through production deployment
Preferred Qualifications
* Master’s degree in Computer Science, Data Science, Engineering, or a related field
* Experience using Python for automation, data processing, analytics, or backend services
* Experience building marketplaces, social platforms, e-commerce systems, or community applications
* Experience integrating payment, shipping, catalog, marketplace, or pricing APIs
* Experience with AI, machine learning, large language models, recommendation systems, or computer vision
* Experience in data analytics, workflow automation, or business-intelligence systems
* Familiarity with Docker, Kubernetes, Terraform, serverless computing, or infrastructure as code
* Experience with trading cards, Pokémon TCG, sports cards, collectibles, or hobby marketplaces
* Familiarity with platforms such as Whatnot, TCGplayer, eBay, Collectr, PSA, CGC, or Beckett
* Experience working in a startup or building a product from zero to launch
Ideal Candidate
The ideal candidate:
* Enjoys building new products rather than only maintaining existing systems
* Is comfortable working directly with a founder
* Can operate effectively when product requirements continue to evolve
* Thinks about business outcomes and user experience, not only technical implementation
* Can move between backend, frontend, database, infrastructure, and automation work
* Makes practical decisions appropriate for an early-stage company
* Communicates technical tradeoffs clearly to nontechnical stakeholders
* Takes ownership of delivery, production quality, and long-term maintainability
* Has an interest in collectibles, marketplaces, live commerce, or community-based products
Initial Projects
The engineer’s initial projects may include:
1. Moredou company website and Pokémon trading-platform waitlist
2. Pokémon card catalog and search functionality
3. User authentication and collector profiles
4. Personal collection, want-list, and trade-list management
5. Card condition, language, variant, and grading data models
6. User-to-user trade proposal and counteroffer workflows
7. Inventory-management tools for Whatnot live shows
8. Sales, inventory-cost, and profitability dashboards
9. Market-price data ingestion and pricing-history functionality
10. Administrative tools for card, user, inventory, and trade management
Compensation and Benefits
* Annual salary: $130,000
* Full-time employment
* Paid time off and company holidays
* Opportunity to influence product architecture and company direction
* Potential for expanded technical leadership responsibilities as the company grows
Additional benefits and any potential incentive or equity arrangements will be discussed based on experience and long-term fit.
How to Apply
Please submit:
* An updated resume
* LinkedIn profile
* GitHub profile or technical portfolio, when available
* Examples of products or systems you have helped design and launch
* A brief description of your Java, Spring Boot, React, PostgreSQL, and AWS experience
* Your current location and availability
* Your experience with marketplaces, e-commerce, AI, automation, or collectibles
Qualified candidates will be invited to an initial phone or video interview with the company founder.
Pay: $100,000.00 - $150,000.00 per year
Benefits:
Work Location: Hybrid remote in Levittown, NY 11756
