Co-Founder - Full Stack Developer (Co-Founder Position)

We are seeking an experienced Full Stack Developer (Backend-Focused) to join the CHAAMO team.

This role will be heavily backend-driven, with responsibility for developing and optimising the core systems that power our platform, including data processing, automated data collection, integrations, analytics, and infrastructure. A significant part of this role involves building and maintaining the automated data pipelines that feed our pricing engine, so hands-on experience designing and running large-scale data collection systems is essential.

You will also support frontend development where needed, but the primary focus is building a robust, scalable, and high-performance backend.

This role requires strong technical ability, reliable communication, and the capacity to collaborate and work independently in a fast-paced start-up environment.

Key Responsibilities

Backend (Primary Focus)

• Design, build, and optimise backend systems that power CHAAMO's core features, including pricing, matching logic, marketplace functionality, and user data.

• Build, maintain, and scale automated data collection pipelines that power CHAAMO's pricing engine, ensuring reliability, resilience to source changes, and clean, structured output.

• Develop and refine the data pipelines that turn collected market data into accurate, structured pricing history and analytics.

• Develop and maintain APIs and complex data structures to support app functionality.

• Build and enhance analytics and reporting systems (user tracking, revenue, VAT/OSS, marketplace metrics).

• Manage and improve integrations including Stripe, Sendcloud, and other third-party services.

• Work closely with external providers (shipping, payments, data services) to ensure stable and scalable integrations.

• Improve performance, reliability, and scalability of backend infrastructure.

• Support and refine data pipelines and matching systems to improve pricing accuracy.

Frontend (Secondary)

• Support development and enhancement of features within the React Native mobile application when required.

• Ensure smooth interaction between frontend and backend systems.

General

• Collaborate with design, product, and leadership to turn concepts into scalable features.

• Manage release cycles and deployments (iOS & Android).

• Provide clear timelines, updates, and communication across all workstreams.

• Participate in code reviews and contribute to best practices.

Required Skills and Experience

• Strong backend development experience (critical requirement).

• Proven experience building and maintaining automated data collection systems — designing large-scale data ingestion, handling high-volume data pipelines, managing rate limits and access constraints, and keeping systems reliable as sources change (critical requirement).

• Proficiency in Python, Node.js, and similar backend technologies.

• Solid experience working with databases (e.g., PostgreSQL, Supabase) and data architecture.

• Strong knowledge of APIs, system design, and data processing.

• Experience building backend systems for marketplaces, analytics platforms, or data-heavy applications.

• Experience managing integrations such as Stripe, Sendcloud, or similar services.

• Working knowledge of React Native / frontend development (secondary requirement).

• Strong problem-solving, debugging, and optimisation skills.

• Ability to work independently and meet deadlines in a startup environment.

• Fluent in English with strong communication skills.

• Minimum 25/30 hrs per week

Nice-to-Have

• Experience collecting and matching product or pricing data at scale (e.g. marketplace or e-commerce data).

• Experience with trading card platforms, marketplaces, or auction systems.

• Experience with matching logic or pricing engines.

• Experience with shipping integrations and payment workflows.

• UI/UX understanding.

**What We Offer

• Opportunity to join a rapidly growing marketplace reshaping the trading card industry.

• A chance to work directly with highly driven founders and a skilled team.

• Flexible working hours and a collaborative remote environment.

• Equity/share options, with a salary introduced once the company reaches stable cash flow.

• Long-term growth and leadership opportunities.