Design, implement and improve backend services supporting payment and transaction flows.
Develop and refine frontend components that power deposit, withdrawal and account experiences.
Own end to end third party payment and supplier integrations.
Implement and maintain secure authentication, webhook validation, signature verification and callback handling.
Improve integration architecture and internal tooling to reduce onboarding time for new providers.
Ensure transactional integrity, idempotency and reliability across all payment flows.
Identify bottlenecks that slow down integration and delivery cycles and propose structural improvements.
Write clean, efficient and maintainable code with strong focus on scalability and resilience.
Collaborate closely with backend, frontend, QA and DevOps teams to deliver reliably and quickly.
Manage individual project priorities, deadlines and deliverables.

4+ years of experience as a Full Stack Engineer working on backend and frontend systems.
Strong experience building and maintaining APIs and transactional backend services.
Experience contributing to modern frontend applications such as React.
Comfortable working in environments that include Go, TypeScript and PHP.
Proven experience integrating third party APIs, ideally payment providers or financial services.
iGaming, fintech or other high transaction system experience is required.
Solid understanding of authentication flows, external callbacks, webhooks and idempotent systems.
Pragmatic mindset focused on shipping and improving time to market.
Strong debugging and problem solving skills.
Comfortable owning a feature or integration from design to production.
Fluent in English, both spoken and written.

Block Labs

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