Senior Fullstack Engineer (Payments)

Location: Remote worldwide; work from anywhere via Deel

Company

hirify.global is a no-code SaaS platform that helps app developers grow revenue through web2app funnels, launched as a new project by Adapty.

What you will do

• Build and improve integrations with payment service providers and external payment systems.
• Develop checkout infrastructure, payment flows, backend logic, asynchronous processes, and webhook-based systems.
• Design scalable and reliable solutions for integration-heavy payment architectures.
• Participate in technical discovery and decompose evolving business requirements.
• Collaborate with Product, Support, and Engineering to shape practical solutions.
• Investigate production incidents and improve engineering quality, observability, reliability, and scalability.

Requirements

• Strong backend engineering experience.
• Solid experience with payment systems, payment service providers, or external integrations.
• Practical experience with APIs, webhooks, asynchronous flows, and integration-heavy architectures.
• Good understanding of distributed systems and backend scalability challenges.
• Experience in startup or fast-changing environments, with the ability to work autonomously amid partially defined requirements.
• Strong ownership, pragmatic engineering judgment, and clear cross-functional communication.

Nice to have

• Experience with Go and multiple payment providers.
• Frontend development or fullstack experience.
• Experience with B2B SaaS or growth-related products.
• Experience with observability, monitoring, or incident handling.
• Interest in product thinking and business impact.

Culture & Benefits

• Flexible remote work from anywhere with a schedule that fits personal needs.
• High ownership and direct influence on product and technical decisions.
• Fast-moving startup environment focused on speed, autonomy, and practical problem-solving.
• Direct and transparent communication with minimal bureaucracy.
• Monthly professional support budget for language learning, development, mental health, sports, or health insurance.